88results about How to "With compressive strength" patented technology

The invention provides a pervious material as well as a preparation method and an application thereof. The pervious material is mainly prepared from a coarse aggregate, an adhesive material, a water purification functional material, and water. As being influenced by a natural shape of the coarse aggregate, the interior of the pervious material is provided with multiple gaps with a high porosity, the gaps can allow a water body to pass through, and the water body can be filtered by virtue of the water purification functional material. The pervious material provided by the invention has high compression strength and breaking strength, has functions of storage regulating permeation and storage regulating purification at the same time, and can be used for constructing various underground spaces for purifying and storing dispersed rainwater by virtue of a simple way of building blocks. The preparation method of the pervious material provided by the invention is simple in process and low in cost, and is suitable for large-scale production. The pervious material provided by the invention has the functions of storage regulating permeation and storage regulating purification at the same time, can be used for constructing various underground water purification devices and underground reservoirs, and can also be used for constructing debris flow protection slopes.

The invention belongs to the technical filed of environmental protection engineering and particularly relates to a harmless treatment method for electroplating sludge. The harmless treatment method comprises the following steps: the electroplating sludge is taken, certain amount of quicklime and flue gas desulfurization gypsum is added, crushed sufficiently and stirred uniformly, the mixture is left to stand for a period of time, and modified electroplating sludge is obtained; the modified electroplating sludge and fly ash are taken and stirred uniformly, a certain amount of a composite activator is added and stirred sufficiently again, and a mixture is obtained; an electroplating sludge test block is obtained in a pressure forming manner and cured in a room-temperature environment for 7-28 days, and a solidified electroplating sludge body is obtained. The harmless treatment method adopted for treating the electroplating sludge has the advantages of simple process, low cost, large electroplating sludge curing amount, small capacity increase and the like, meanwhile, the solidified electroplating sludge body obtained after treatment is highly corrosion-resistant, stable for a long time and low in heavy metal leaching toxicity, has certain compressive strength and can be taken as general solid waste to be subjected to landfill treatment.

The invention relates to an MAX phase ceramic-metal lamellar composite material, a preparation method and a purpose. The MAX phase ceramic-metal lamellar composite material comprises n layers of superposition units, wherein each superposition unit comprises a metal foil layer and an MAX phase ceramic layer attached to the metal foil layer and n is equal to or greater than 2. Ti2AlC powder and metal foil are used as raw materials for the MAX phase ceramic-metal lamellar composite material; a preform is prepared by superposing the metal foil coated with MAX phase ceramic particles; and next, the preform is subjected to pressurization heat treatment, so that the MAX phase ceramic-metal lamellar composite material is obtained. The MAX phase ceramic-metal lamellar composite material is used inthe field of carrying tools, the field of power transmission and transformation or the field of military materials.

The invention discloses a rapid molding method of a sodium silicate sand mould and belongs to the field of rapid casting. The rapid molding method comprises the following steps: (1), establishing a three-dimensional entity model of a sodium silicate sand mould to be molded, taking the Z axis as the molding direction, and setting molding layer thickness; (2), first, paving one layer of molding sand material, and then spraying an adhesive so as to form the current layer of outline pattern, wherein the adhesive is a mixed solution of sodium silicate and polyvinyl alcohol; (3), carrying out microwave heating on the current layer of outline pattern, and forming the current layer of sand mould outline; (4), stopping microwave heating, and lowering the work table for a height of one layer thickness along the Z axis; and (5), repeating steps (2-4) until the sodium silicate sand mould is molded. The method meets the high requirement of sodium silicate sand hardened through microwave heating on the mould, solves the problems that the surface of the sodium silicate sand mould becomes powdery due to overheating and easily absorbs moisture, and further overcomes the poor feasibility, difficult molding sand storage and difficult molding sand recycling defects of the existing micro-injection bonding sodium silicate sand rapid molding technology.

The invention relates to the technical field of pavement repair material, and provides a rapid construction highway repair material and a preparation method and application method thereof. The rapid construction highway repair material is obtained according to the following steps: adding a required amount of dibutyl phthalate, acetone, a filling material and ethene diamine in order into heated to epoxy resin, and mixing evenly to obtain the rapid construction highway repair material. The rapid construction highway repair material provided by the invention not only has the compressive strength and flexural strength of an ordinary cement concrete, but also has the advantages of short forming time and low spreading temperature, so as to reduce the construction temperature requirement and simplify the construction process. Therefore, the rapid construction highway repair material provided by the invention has higher practicability, allows usage of the highway as soon as possible, realizes full performance of usage efficiency of the highway, and shows wide application prospect.

The invention discloses an encapsulated sustained-release acid for oil-water well reconstruction and a preparation method thereof. The encapsulated sustained-release acid comprises a capsule core and a sustained-release supporting layer coated on the outer layer of the capsule core, wherein the capsule core is a soluble or meltable solid acid, the sustained-release supporting layer comprises a sustained-release wall material and a supporting wall material, the sustained-release wall material is an organic fatty acid or a derivative thereof, the supporting wall material is acrylic resin or a derivative thereof, and the solid acid is solid hydrochloric acid powder or citrate. The encapsulated sustained-release acid is a spherical granule with the particle size of 0.15-0.25 mm. The encapsulated sustained-release acid also comprises an adhesive spray-coated on the capsule core, wherein the adhesive is water-soluble vegetable gum or a derivative thereof, and is specifically guar gum, hydroxypropyl guar gum or carboxymethyl hydroxypropyl guar gum. According to the invention, the control mode of the acid radical ion consumption is simple and accurate; the preparation process is simple; and the encapsulated sustained-release acid is reliable in performance, safe for transportation and carrying, and convenient for use, and can be used for reducing the probability of underground tool acid corrosion and operation personnel damage in the application.

The invention discloses a plugging agent for environment-friendly water-based drilling fluid and a preparation method of the plugging agent. A product is obtained from a reaction of, by weight, 30-50 parts of carbon balls coated with AlOOH, 10-20 parts of acrylamide, 10-20 parts of N-isopropylacrylamide and 2-4 parts of hexamethylenetetramine under the action of 0.01-0.05 part of initiator, and the plugging agent for the environment-friendly water-based drilling fluid is obtained by mixing the product and 30-50 parts of vinyl acetate-ethylene copolymer emulsion under the action of 2-5 parts of dispersant. The plugging agent for the environment-friendly water-based drilling fluid has the advantages of good plugging effect, no toxic effect, certain compressive strength, high temperature-resistance capability and good compatibility with the drilling fluid.

The invention relates to the technical field of oil field oil production engineering, and particularly belongs to an alkali-resistant film-coating propping agent suitable for ASP compound flooding. The propping agent mainly solves the problems that an existing coating film propping agent is not resistant to alkali, the propping agent is transferred in the ASP compound flooding process, accordinglyfracturing cracks are closed, and fracturing measures fail. The propping agent comprises, by weight, 90-93% of quartz sand, 2.5-5% of alkali-resistant resin, 1.3-3.6% of a curing agent, 0.07% of a silane coupling agent, 1.5% of a diluent and 0.5% of a lubricant. The alkali resistance of the film-coating propping agent is improved, so that the film-coating propping agent still has relatively highcompressive strength under a strong alkali system of ASP compound flooding, and requirements of the ASP compound flooding oil-water well fracturing measures are met.

The present invention provides a vacuum container, capable of keeping a sufficient mechanical strength and implementing a lightweighting, and reducing a material cost and a processing cost to the utmost. A plasma processing container (100a) includes a square tubular lower container (1) and an upper container (10) combining with the lower container (1). The upper container (10) has a frame (21), a spray head (25) connected to the frame through an insulating member (23), and a beam structure (27) arranged above the frame (21) and the spray head (25); a bottom board (31) composing the spray head (25) is exposed in an external space of the atmosphere pressure.

To provide a photosensitive resin composition for spacers capable of reducing defects in an unfilled region due to a dropping amount of a liquid crystal, capable of preventing damage by pressure on a color filter, capable of suppressing thickness variation which is unavoidable in a process, free from leaching of ions or impurities in a liquid crystal, not lowering voltage retentivity, having no effect on liquid crystal alignment, and capable of forming spacers excellent in rubbing resistance, having satisfactory voltage retentivity and liquid crystal aligning property, and excellent in developability, high sensitivity, heat stability, dimensional stability and compressive strength. The photosensitive resin composition for spacers comprises (a) a resin selected from the group consisting of (i) an alkali-soluble acrylate resin, (ii) a photopolymer resin and (iii) a mixture of these, (b) a urethane resin, (c) a crosslinkable monomer having at least two or more ethylenic double bonds, (d) a photopolymerization initiator and (e) a solvent.

The invention discloses a two-pore zeolite microsphere and a preparation method thereof. The diameter of the microsphere is 4-6mm, the water absorption is 18-24%, the apparent density is 610-630kg / m<3>, and the compressive strength is greater than or equal to 6MPa. Compared with the prior art, the prepared super-light micropore-mesopore two-pore zeolite microsphere has certain compressive strength, is easily fluidized and prevents water loss; with micropore and mesopore two-model pore distribution, the diffusion path of molecules can be shortened, the specific surface area is large, and the adsorption exchange ability is relatively strong; and the two-pore zeolite microsphere can be applied to deep treatment of industrial wastewater, and also can be used as a carrier of an aerobic (anaerobic) microorganism / photocatalyst of an aerobic (anaerobic / photocatalysis) fluidized bed reactor in the field of water (wastewater) treatment. The invention provides a new green efficient method for expanding the application of industrial waste fly ash to the field of environmental protection.

The invention relates to filling and sealing of a roof falling hole inside a coal mine tunnel, in particular to a chemical macromolecule grouting filling sealing material. The material comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1:1. The component A comprises a three-functional-group polyether polyol, a two-functional-group polyether polyol and an amido polyether polyol, wherein the ratio of the three-functional-group polyether polyol to the two-functional-group polyether polyol to the amido polyether polyol is 8:1:1; additives including, by weight, 0.1% of a metallic tin catalyst, 0.05% of an amine catalyst, 0.5% of a foam stabilizer, 14% of a fire retardant DMMP, 6% of a fire retardant and 2-4% of water are added on the basis of the polyether polyol. All the components form the component A after being directly mixed. The component B is isocyanate. The material is reasonable in design, construction is convenient and rapid, labor intensity is low, efficiency is high, no hazardous gas is generated, the reaction temperature is lower than 80 DEG C, the foaming ratio is larger than 40 folds, and the compressive strength reaches 80 kPa when the compressive strain is 10%.

The invention provides an absorbing material and a preparation method thereof. The absorbing material comprises a base material; an absorbent; an anti-aging agent; and a solvent, wherein the absorbentcomprises magnetic hollow microspheres made of hollow glass microspheres The absorbing material reduces the density of the material while ensuring the absorbing property and the mechanical property,and can effectively meet the requirement of light weight of the material.

The invention provides a high-temperature blast hole thermal insulation sheath comprising a sheath body. The high-temperature blast hole thermal insulation sheath is characterized in that the sheath body comprises an outer thermal insulation layer, a middle thermal insulation layer and an inner thermal insulation layer which are sequentially bonded into a whole from outside to inside; the outer thermal insulation layer, the middle thermal insulation layer and the inner thermal insulation layer are made of tin foil paper, thermal insulation compressed powder materials or super-thermal insulation blankets and ceramic fibers respectively; a charging cartridge made of kraft paper is further arranged in the sheath body, an upper cover and a lower bottom are arranged at the upper end and the lower end of the charging cartridge respectively, and the lower bottom is a flat bottom or an arched bottom. The invention further provides a blasting assembly comprising the thermal insulation sheath and a construction method. According to the thermal insulation sheath, the blasting assembly and the construction method, blasting safety hidden danger is eliminated under the high-temperature blast hole condition, the construction process is simple, reliability is high, cost is saved, and large-scale construction operation can be achieved.

The invention discloses a biologically-active porous coarse-aggregate ecological bank-protecting matrix engineering material, comprising coarse aggregate, a binding material and a filling material, wherein the coarse aggregate is castaway slag; the binding material is a mixture of C60-or-above high-strength cement, sand, an additive and a binder; and the filling material is a mixture of soil, activated sludge, a water-retaining agent and fertilizer. The coarse aggregate and the binding material are mixed and then coagulated and molded with a mold so as to form a porous ecological bank-protecting matrix engineering material with n rhombic hollowed-out structures, and the filling material is added into pores and / or the rhombic hollowed-out structures. The ecological bank-protecting matrix engineering material designed in the invention can maintain substance and energy exchange among riverbanks, water bodies and natural environment, retains the water and soil of riverbanks, improve ecological vitality in waterfronts and river bottoms and realizes environmental protection ecology and landscape optimization.

The invention discloses a fireproof A1 level inorganic interior and exterior wall heat insulation board and a production method thereof. The heat insulation board comprises 60-80wt% of Portland cement, 0-21wt% of slag powder, 10-35wt% of fly ash, 1.4-2wt% of a waterproof agent, 1-2wt% of iron oxide black, 0.1-0.34wt% of fiber, 0.01-0.8wt% of cellulose, 0.3-1.2wt% of an early strength agent, and 7-12wt% of a foaming agent. The invention also provides a production method of the fireproof A1 level inorganic interior and exterior wall heat insulation board. The heat insulation board is produced by adopting inorganic materials, so the heat insulation board has the advantages of certain compressive strength and tensile strength, light weight, water and fire proofing, corrosion proofing, sound insulation, heat insulation, non-toxicity, no peculiar smell, small heat conduction coefficient, freeze and thaw resistance, and good weather ability, has same life with a unit building, and is a most rational exterior heat insulation material. Repeated construction, repeated investment and repeated pollution are avoided in the invention. The heat insulation board and the production method have good economic, social and environmentally friendly benefits.

The invention provides a rigid gas-liquid coalescing filter element, and a preparation method and device thereof. The filter element comprises a coalescing layer which surrounds the outer side of a central air inlet channel and is used for coalescing and separating liquid drops flowing in from the air inlet channel, and the filter element also comprises a liquid discharging layer which surrounds the outer side of the coalescing layer and is used for providing a liquid discharging channel for condensed liquid drops, wherein the coalescing layer is formed by drying and solidifying a first flexible material containing an adhesive, the liquid discharging layer is formed by drying and solidifying a second flexible material containing an adhesive, the first flexible material containing the adhesive is obtained by carrying out vacuum suction to enable an adhesive solution to pass through the first flexible material, and the second flexible material containing the adhesive is obtained by carrying out vacuum suction to enable an adhesive solution to pass through the second flexible material. According to the invention, the strength of the gas-liquid coalescing filter element can be improved, and requirements of a high-pressure working condition can be met.

The invention discloses an encapsulated sustained-release acid for oil-water well reconstruction and a preparation method thereof. The encapsulated sustained-release acid comprises a capsule core and a sustained-release supporting layer coated on the outer layer of the capsule core, wherein the capsule core is a soluble or meltable solid acid, the sustained-release supporting layer comprises a sustained-release wall material and a supporting wall material, the sustained-release wall material is an organic fatty acid or a derivative thereof, the supporting wall material is acrylic resin or a derivative thereof, and the solid acid is solid hydrochloric acid powder or citrate. The encapsulated sustained-release acid is a spherical granule with the particle size of 0.15-0.25 mm. The encapsulated sustained-release acid also comprises an adhesive spray-coated on the capsule core, wherein the adhesive is water-soluble vegetable gum or a derivative thereof, and is specifically guar gum, hydroxypropyl guar gum or carboxymethyl hydroxypropyl guar gum. According to the invention, the control mode of the acid radical ion consumption is simple and accurate; the preparation process is simple; and the encapsulated sustained-release acid is reliable in performance, safe for transportation and carrying, and convenient for use, and can be used for reducing the probability of underground tool acid corrosion and operation personnel damage in the application.

The invention discloses a road paving method, relating to the technical field of highway construction. The method adopts a cement concrete roadbed and comprises the following steps: (A) preparing a black pavement material by adopting the following raw materials in parts by weight: 30-45 parts of asphalt, 20-31 parts of deep-color silica powder, 13-25 parts of black iron powder, 10-18 parts of carbon powder, 25-35 parts of low-heat cement, 40-50 parts of stone sand, 36-45 parts of water and 12-25 parts of water reducing agent; and (B) paving the black pavement material on the cement concrete roadbed, and compacting by a rolling machine, wherein the paving thickness is 5-7 centimeters. The road paving method is used for changing a white pavement into a black pavement; and compared with the prior art, the road paving method has the advantages of solving the problems that the white pavement is poor in elasticity, poor in visual effect and easy to cause traffic accidents.

The invention discloses a preparation method of starch-based porous micro-spheres and belongs to the technical field of natural high molecular materials. The preparation method comprises the followingsteps: mixing a starch-based porous micro-sphere blank with water in a mass ratio of 1: 10 to 1: 15 and adding amylase which is 0.02-0.05 time of the starch-based porous micro-spheres by mass and lipase which is 0.01-0.002 time of the starch-based porous micro-spheres by mass into a mixture of the starch-based porous micro-sphere blank and water; stirring and mixing the mixture; filtering the mixture to obtain pre-treated starch-based porous micro-spheres; mixing the pre-treated porous micro-spheres with 10-18% by mass hydrochloric acid in a mass ratio of 1: 5 to 1: 6; stirring and mixing themixture; filtering the mixture to obtain a filter cake; washing the filter cake with deionized water for 5-8 times; and drying the filter cake at 80 DEG C for 2-3 hours to obtain the starch-based porous micro-spheres. The starch-based porous micro-spheres prepared by the technical scheme have the characteristic of high porosity and have a wide prospect in development of natural high molecular material technology.

The invention relates to water-permeable asphalt concrete and a preparation method and application thereof. The water-permeable asphalt concrete is prepared from, by weight, 200-400 parts of coarse aggregate, 20-40 parts of fine aggregate, 40-50 parts of fly ash, 80-120 parts of Portland cement, 80-120 parts of modified asphalt, 10-20 parts of enhancer, 10-20 parts of water reducing agent and 120-180 parts of water; wherein the fine aggregate comprises expanded vermiculite and / or expanded perlite; and the average particle size of the fine aggregate is 2-4mm. Through specific setting of the components of the water-permeable asphalt concrete and specific selection of the weight parts of the components, the obtained water-permeable asphalt concrete not only has excellent water permeability, but also has relatively high mechanical properties, and is suitable for pavement materials and bridge deck materials under different conditions.

The invention relates to a thermal insulation structure foundation of a molten salt storage tank, belonging to the technical field of solar power generation. The invention consists of a deformation-resistant structure, a thermal insulation structure, and a reinforced concrete bottom plate from top to bottom, the steel ring wall is placed on the reinforced concrete bottom plate, and the thermal insulation structure is compacted ceramsite with good gradation, which can follow the steel ring wall to reach high temperature. The deformation-resistant structure is a dry sand layer with a slope close to the lower surface of the tank bottom plate, which can convert the sliding friction generated by the displacement of the storage tank bottom plate when thermal deformation occurs into rolling friction; the reinforced concrete bottom plate is embedded with air The cooling pipe can reduce the temperature of the concrete floor and avoid high temperature deformation and cracking. The invention adopts thermal insulation measures, a deformation-resistant structure and a heat-dissipating structure, and realizes the functions of not only keeping the medium in the storage tank warm, but also resisting high-temperature deformation and pressure bearing, and avoiding the excessive settlement of the molten salt storage tank and the undesired failure of the foundation. The inclination or instability of the storage tank caused by the uniform settlement may even lead to secondary hazards such as the rupture of the storage tank.

The invention discloses a coordination type deep-sea oil transportation pipeline which comprises an inner pipe, an outer pipe and heat-insulation materials. Spaces between the inner pipe and the outer pipe are filled with the heat-insulation materials, the heat-insulation materials are made of polyurethane foam materials or foam cement, an anticorrosion layer is arranged on the outer wall of the inner pipe, antislip mats are equidistantly wound on the anticorrosion layer, and centering rings with continuous groove structures are butted onto the antislip mats. The coordination type deep-sea oil transportation pipeline has the advantages of excellent coordination effects and buckling resistance, good heat-insulation performance, low steel consumption, high bending rigidity and applicability to deep-sea and extra-deep-sea oil and gas development environments.

The invention discloses a high-strength strong-weak-electricity compound cable which comprises four power cable cores, wherein the four power cable cores are peripherally and evenly arranged, a buffercore is arranged among the four power cable cores, a central hole is formed in the middle of the buffer core, a control cable core is arranged in the central hole, four lateral holes are peripherallyand evenly formed in the outer side of the central hole and on the buffer core, reinforcing cores are arranged in the lateral holes, a water-blocking taped covering layer is arranged on the outer sides of the four power cable cores, space of the inner side of the water-blocking taped covering layer is filled with an insulation foam layer, and a halogen-free low-smoke flame-retardant polyethyleneinner protective jacket layer, a metal protection layer and a low-smoke halogen-free flame-retardant polyolefin outer protective jacket layer are sequentially arranged on the outer side of the water-blocking taped covering layer. The high-strength strong-weak-electricity compound cable disclosed by the invention has the advantages of compact structure, high compression resistance and tensile strength, ability in effectively blocking water, good rat and ant resistance, safe and reliable signal transmission and ability in achieving integrated control.

The invention belongs to the technical field of preparation of nano porous materials, and particularly relates to a preparation method of a hydrophobic foamed cement composite silicon aerogel material. Tetraethyl orthosilicate is taken as a precursor, organosilane is taken as a modifying agent, foamed cement is taken as a hard reinforcing matrix, a sol-gel method, an in-situ polymerization methodand a vacuum impregnation process are adopted, and rapid ethanol supercritical drying is combined to prepare the composite silicon aerogel material. The prepared hydrophobic foamed cement composite silicon aerogel material has a density of 0.40-0.73 g / cm<3>, the compressive strength is 0.8-2.1 MPa, the normal-temperature thermal conductivity is 0.054-0.186 W*m<-1>*K<-1>, and the hydrophobic angleis 118-146 degrees. The process is cheap in material and simple and convenient in preparation method; the production period is compressed from 5-7 days of a conventional method to within 10 hours; a large amount of ethanol is saved while the preparation period is shortened; and the preparation method has the significance of large-scale industrial production.

The invention relates to the field of a miniature fuel battery, and particularly relates to a machining method of a miniature metal bipolar plate based on a plasticine support. The machining method comprises the steps of arranging the plasticine support below a metal plate, paving a layer of PVC (Polyvinyl Chloride) plastic film with the thickness of less than 5mum on the upper surface layer of the plasticine support, controlling the motion path and speed of a micro-forming die head, and finishing the forming of the whole metal bipolar plate by the micro-forming die head through accumulation of plastic forming of a small region, wherein the plasticine comprises 70-80% of clay powder, 3-5% of liquid paraffin, 3-5% of glycerol, 2-3% of vaseline, 3-6% of talcum powder, 0.5-1.0 of alpha-SiC whisker reinforcing agent and 3-5% of water, wherein the whisker reinforcing agent has the particle size of 15-20mum and the whisker size of 150-200mum. The machining method solves the problems that when no support is arranged, the machining accuracy is low, and when an elastic support is added, resilience exists and the shape of the bipolar plate are affected, and has the advantages of high machining accuracy and low cost.

The invention discloses a multicolor integrated dental repair material and a preparation method thereof and relates to the technical field of denture repair materials. The multicolor integrated dentalrepair material and the preparation method thereof can solve the problem that false teeth made of existing repair materials are different in color from real teeth and unattractive in appearance. Themulticolor integrated dental repair material is composed of raw materials including, by weight part, 60-70 parts of polymethyl methacrylate, 30-40 parts of methyl methacrylate, 0.03-0.06 part of 2, 6-di-tert-butyl-4-methylphenol, 0.02-0.04 part of N, N-dimethyl-p-toluidine, 0.02-0.04 part of glycol dimethacrylate and 0.2-0.6 part of color master batch. According to the preparation method of the multicolor integrated dental repair material, through interaction of catalysts, cross-linking agent and polymerization inhibitor, curing speed can be controlled; through a casting manner, the multilayercolor-gradient dental repair material can be prepared. The multicolor integrated dental repair material is high in simulation, attractive in appearance, wide in applicability, capable of meeting people's demand on color-gradient dentures and improving the denture processing efficiency, high in interfacial strength, less prone to separation when under cutting force during processing and good in impact resistance.

The invention provides a base plate for PCB drilling and a manufacturing method of the base plate for the PCB drilling. The base plate comprises a foamed core material layer, and a first hardness panel layer and a second hardness panel layer which are respectively arranged on the upper surface and the lower surface of the foamed core material layer. According to hardness panels, the flash of an opening can be well inhibited, and because the foamed core material layer is arranged in the middle of the base plate, a foam interlayer of the base plate has the certain compressive strength, so that a PCB can be prevented from generating slight deformation due to pressing in the drilling process, the plate can be easily cut into powder by a drill bit, drilling cuttings adhered to the drill bit are thrown out, an effect of cleaning the drill bit is achieved, and a support is provided for forming relatively high-quality drill holes.

The invention discloses a production process of sandwich cotton for color steel sandwich compounding. The production process specifically includes the following steps: A, feeding raw materials including 62.5-67.5% of SiO2, 5.5-7% of B2O3, 10.5-12% of CaO and MgO, 0.0-1.0% of Fe2O3, 0.7-3.0% of Al2O3 and 14.5-18.0% of K2O and Na2O according to a certain sequence, and mixing the raw materials, wherein the temperature during preparation is 35-45 DEG C; B, feeding the mixed materials into a kiln, and increasing the temperature for melting; C, monitoring and ensuring the continuity and uniformity in feeding by an automatic liquid level control system, and recycling waste gases, wherein the measurement error of a laser liquid level indicator is + / -0.5mm; D, allowing the melted raw materials to flow into a centrifuge, drawing fiberglass, and feeding high-bonding-strength adhesives and air atomized glue sprays to the lower portion of the centrifuge to form the sandwich cotton. The sandwich cotton produced by the production process has the felt properties of glass cotton rolls and the compression strength of glass cotton strips, has high hydrophobicity, and has the advantages of noise reduction, insulation, high corrosion resistance, high mechanical strength and the like.

The invention relates to building materials, in particular to a sound-insulating aluminum plastic composite plate with high heat-dissipating property. The section structure comprises an ETFE (ethylene-tetrafluoroethylene copolymer) coating, an aluminum alloy plate upper layer, a polyethylene (PE) plate upper layer, an aluminum silicate fiberboard layer, a PE plate lower layer, an aluminum alloy lower layer, and a PVDF (poly-vinylidene difluoride) coating sequentially from outside to inside, wherein the aluminum alloy upper layer, the PE plate upper layer, the aluminum silicate fiberboard layer, the PE plate lower layer and the aluminum alloy plate lower layer are bonded; an aluminum heat-conducting column is fixedly connected between the aluminum alloy plate upper layer and the aluminum alloy plate lower layer; the aluminum heat-conducting column runs through the PE plate upper layer, the aluminum silicate fiberboard layer and the PE plate lower layer. The sound-insulating aluminum plastic composite plate with high heat-dissipating property has excellent heat-conducting capability, has a certain sound-insulating and sound-absorbing function and is suitable for buildings such as machine rooms to use.