81results about How to "Effective blockage" patented technology

The invention provides microarc-oxidized coating silylation fluid and a hole sealing method thereby. The hole sealing method by the microarc-oxidized coating silylation fluid includes: firstly, mixing deionized water, alcohol and silane coupling agent according to a volume ratio of 3-6:1:1, and adjusting pH value to obtain the microarc-oxidized coating silylation fluid; secondly, hydrolyzing the microarc-oxidized coating silylation fluid for more than 12 hours to obtain silane coupling agent hydrolyzed solution; thirdly, soaking microarc-oxidized coating in the silane coupling agent hydrolyzed solution for 19s to 20min, taking out the coating for air drying to obtain coating with absorbed hydrolyzed solution; and fourthly, heating and solidifying the coating with absorbed hydrolyzed solution at 50-300 DEG C for 15-300 minutes. The microarc-oxidized coating is silylated by the soaking-solidifying method, the process is simple, cost is low, and the hole sealing method by the microarc-oxidized coating silylation fluid is applicable to hole sealing of microarc-oxidized coatings of magnesium alloy, aluminum alloy and titanium alloy.

The invention discloses a hot-pressed veneer adhesive and a preparation method thereof. The hot-pressed veneer adhesive mainly comprises the following components: deionized water, polyvinyl alcohol, an emulsifier, an initiator, methacrylic acid, N-methylol acrylamide, vinyl acetate, a plasticizer, a buffering agent, cassava starch, borax, a dispersing agent, aqueous rosin, a defoaming agent and a corrosion inhibitor. When the hot-pressed veneer adhesive is prepared, the preparation method comprises the following steps of: firstly synthesizing a self-crosslinked polyvinyl acetate copolymerization modified emulsion, then adding 20-35% of raw cassava starch, a crosslinking agent, waterborne tackifying resin and other auxiliaries for mixing and finally preparing the hot-pressed veneer adhesive with excellent performances. Compared with a traditional urea resin veneer adhesive, the adhesive prepared by the invention has the advantages of convenience in use, low curing temperature, short curing time and no harm to an environment and a human body.

The present invention discloses a kind absorptive bone hemostatic for surgical and orthopedic operation. The absorptive bone hemostatic includes mainly chitosan or modified chitosan 20-95 weight portions, konjaku glucomannan or carboxymethyl modified konjaku glucomannan 5-80 weight portions, and water in 50-500 % of total solid matter. It is prepared through mixing powder or water solution of the material. The absorptive bone hemostatic has simple operation, good compatibility, no irritation and inflammation reaction, and can induce bone growth.

The invention discloses a cement-based material carbon sequestration internal curing agent as well as preparation and application thereof. The internal curing agent is modified biochar or a compound of the modified biochar and light aggregate and / or super absorbent resin; and the modified biochar is biochar powdery particles obtained by soaking biochar obtained by pyrolyzing biomass under high-temperature and oxygen-limited conditions in an alkaline solution, drying and grinding. The rich pore structure and the strong hydrophilic performance of the biochar enable the biochar to achieve the internal curing effect of the cement-based material, and the good stability can ensure the long-term and stable development of the performance of the cement-based material; the biochar is sealed in the cement-based material, so that the release of CO2 can be reduced, and the effects of carbon sequestration and emission reduction are achieved; and the biochar modified by the aqueous alkali can make the cement more fully hydrated, and when the biochar is matched with the lightweight aggregate and / or the super absorbent resin for use, the internal curing effect is stronger. After the internal curing agent provided by the invention is doped, the compressive strength and bending strength of the cement-based material at the age of 28 days are improved, and the self-constriction is effectively reduced.

The invention provides an oil and water selective self-expansion rubber plugging agent for a fractured-vuggy reservoir as well as a preparation method and an application of the rubber plugging agent and belongs to the field of functional polymer materials. The rubber plugging agent has the performance characteristics such as high mechanical strength, high mineralization resistance, high toughness,high volume expansion rate, no separation, autohesion and the like. The rubber plugging agent is prepared from raw materials in parts by weight as follows: 100 parts of nitrile butadiene rubber, 50-110 parts of water-absorbent resin, 5-15 parts of oil swelling resin, 15-30 parts of a reinforcing agent, 0.5-2 parts of a softening agent, 2-5 parts of an accelerant, 3-6 parts of zinc oxide and 0.5-3.5 parts of a vulcanizing agent. The rubber plugging agent can be applied to deep plugging of high-temperature, high-salt and highly-mineralized fractured-vuggy carbonate reservoirs.

The invention relates to a tamping plug used for blocking a blast hole after the blast hole is filled with an explosive, and belongs to the technical field of blasting engineering. An inner concave arc-shaped part is arranged at the front end of the tamping plug; a cone-shaped part is arranged at the rear end of the tamping plug; the inner concave arc-shaped part has an arc-shaped longitudinal profile; the diameter of the inner concave arc-shaped part is 1-2 cm smaller than that of the blast hole; the maximum diameter of the cone-shaped part is the same as the diameter of a cylindrical section of the inner concave arc-shaped part. The tamping plug for blasting engineering provided by the invention uses indigenous raw materials, adopts materials with stronger shear performance such as plastics and rubber and is manufactured in a die, therefore the manufacture is easy, manufacturing materials are wide in source, the plugging method is simple, more sufficient reaction of the explosive in the blast hole is ensured, more heat is released, the formation amount of poisonous and harmful gases is reduced, the action time of explosion gases is prolonged, the temperature and pressure of the explosion gases for escaping from the free face are reduced, the explosive consumption per unit volume of rock is reduced, air shock waves are reduced, initiation of gas explosion is prevented, the blocking length of the blast hole is reduced, and economic effects are good.

The invention provides an egg preservation whey protein self-assembly fiber coating agent and an application method thereof. A whey protein solution with,mass concentration of 2-4% is prepared by using deionized water; the pH value of the solution is adjusted to 1.5-2.5 through 3mol / L hydrochloric acid, the solution is centrifuged for 15-20 min at a rotating speed of 9000r / min and at 4 DEG C, and the supernatant is subjected to suction filtration by a mixed fiber membrane with pore diameter of 0.45 micron; the filtrate is added into an airtight round-bottom flask and is heated in a water bath oscillation manner for 7-9h at 75-85 DEG C and a rotating speed of 300r / min to obtain fibrous protein, and the fibrous protein is freeze-dried or spray-dried to obtain fibrous protein powder. According to the invention, the whey protein is used as the raw material and is treated to form the fibrous protein powder with a certain length. The powder is prepared into 2-4% solution to coat eggs, protective films formed after air drying can effectively block air holes and seal tiny cracks to keep the eggs fresh and prolong the quality guarantee period by three to four times.

The invention relates to a double-drum filter valve, wherein an included angle Alpha which is matched with the rotation angle of an upper plunger valve is formed between the central axis of the seal end of a valve seat a and the central axis of the seal end of a valve seat b in an upper valve cavity; an included angle Beta which is matched with the rotation angle of a lower plunger valve is formed between the central axis of the valve port seal end of a valve seat c and the central axis of the valve port seal port of a valve seat d in a lower valve cavity; and the included angle Alpha and theincluded angle Beta are both 90 DEG. Due to the setting of the included angles, the clamping force between the valve and the valve seats is increased, and the sealing performance is improved; in addition, a seal ring is arranged on the seal end of each valve seat, two axial ends of the upper plunger valve and the lower plunger valve are respectively provided with a ceramic cup-cover-shaped seal structure which forms plug seal to the seal ends of the valve seats, and a positioning flange on each seal structure is in a shape of a cone which is narrowed along the free end. With the structure design, when the plunger valve and the valve seats are sealed, double seal surface seal of end surface and lateral surface is formed, and the plug seal is more reliable; and when a single filtering drum works, a filtering drum which does not work cannot generate liquid leakage.

The invention relates to the field of pharmaceutical formulations, and in particular relates to a traditional Chinese medicine for treating coronary heart disease. The traditional Chinese medicine is characterized by being prepared from the following raw medicines in parts by weight: 20 to 40 parts of pubescent holly root, 7 to 13 parts of ziziphora clinopodioides, 5 to 7 parts of red rhodobryum, 10 to 20 parts of fuscoporia punctata, 12 to 18 parts of semen cassia, 10 to 20 parts of humifuse euphorbia herb, 12 to 18 parts of notopterygium root, 6 to 14 parts of ardisiae japonica, 15 to 25 parts of storax, 10 to 20 parts of acorus calamus, 15 to 25 parts of woody-rhizomed fimbristylis herb, 10 to 20 parts of radix bupleuri, 12 to 18 parts of humulus scandens, 15 to 25 parts of semen lepidii, 5 to 13 parts of zornia gibbosa, 8 to 16 parts of trichosanthes kiritowii maxim, 15 to 25 parts of eucommia ulmoides, 15 to 25 parts of cynanchum paniculatum, and 15 to 25 parts of alpinia katsumadai. The traditional Chinese medicine is prepared by soaking the nineteen raw medicines with water, then decocting, and removing the leaves to obtain the filtrate. According to the traditional Chinese medicine for treating coronary heart disease, all raw medicines are coordinated to act to realize the effects of effectively treating coronary heart disease and cardiovascular blockage, the treatment effect is accurate, the recovery rate is high, and any toxic and side effects are not caused.

The invention discloses anti-cracking, wear-resistant and seepage-proof compound mortar. The anti-cracking, wear-resistant and seepage-proof compound mortar is prepared from raw materials in parts by weight as follows: 20-30 parts of long and short reinforcing fiber, 15-20 parts of a waterproof additive, 10-20 parts of gelatine powder, 10-16 parts of a composite aid, 10-14 parts of glass beads, 65-75 parts of Portland cement, 55-65 parts of fine sand, 35-45 parts of composite filling sand, 1-2 parts of triethanolamine and 1-3 parts of sodium tripolyphosphate. The compound mortar has excellent anti-cracking, wear-resistant and efflorescence preventing properties and has better water resistance, seepage-proof property and adhesion force, relatively excellent impact resistance and thermal insulation and sound insulation effects and a certain pollutant air absorption function; besides, according to the provided preparation method, the material cost is lower, raw materials are easy to obtain, the process is simple, and the compound mortar has higher practical value and excellent application prospects.

The invention provides environment-friendly high-adhesion building primer and a preparation method thereof. The primer comprises a polymer emulsion, a potassium silicate solution, a pH regulator, a freeze-thaw stabilizer, a dispersing agent, a wetting agent, a defoaming agent, pigment, a thickening agent, a coalescing agent, a base material wetting agent and water. The potassium silicate solutionand the cement in the base material belong to silicate inorganic substances and have very good compatibility, and the molecular-level potassium silicate solution can easily wet and permeate into capillary holes of the base material under low surface tension, so that the alkali efflorescence resistance of the primer is improved, the base material is reinforced, and the bonding strength of the basematerial and the primer is improved. Besides, the primer is excellent in performance, all raw materials adopted are environment-friendly and low-odor, harmful substances such as VOC, formaldehyde, heavy metals, APEO and a biocide are not added artificially, the produced product is non-toxic and odorless, and therenewable potassium silicate solution is used as a film forming substance.

The invention relates to a method for maintaining a blast furnace taphole. The technical scheme is that the method comprises the following steps of: cleaning iron runners on two sides of the taphole, a mud sleeve and a taphole frame 1, welding a blind plate 3 to the taphole frame, grouting a grouting nozzle stub on the blind plate 3 by adopting a thermoplastic phenolic resin bonded hard press-in material, standing for 1 to 1.2 hours, detaching the blind plate 3, and cleaning up the grouting material in the taphole; welding a baffle plate 5 to the taphole frame, and pouring an iron runner castable; and respectively opening a grouting hole on a left cross joint, a right cross joint and a vertical joint on the taphole cooling wall, and grouting each grouting hole until the pressure is 4.5 to 5MPa. The method has the characteristics of good treatment effect, reduction of gas leakage in a blast furnace taphole area and guarantee of normal production of the blast furnace.

The present invention is electronic intelligent comprehensive management system and method for preventing theft and rubbing of motor vehicle. The system includes data detection part, data transmission part and data processing part, and the data detection part includes a remote card set in the vehicle, a short-range card carried about by the vehicle owner and a card-detecting instrument. The management method includes: setting remote card fixed in the vehicle; setting the short-range card with unique number and important vehicle data and information; detecting the cards with the card-detectinginstrument to obtain the data of the vehicle; transmitting the obtained data to be data detection part; receiving in the detection part the said data and comparing them with those pre-stored in the data base.

The invention discloses an aerosol heavy oil shaking and dissolving device and a viscosity reducing method. Nitrogen is produced by ground equipment, and the nitrogen is pressurized by using nitrogencompression equipment and input into an air inlet pipe of the aerosol heavy oil shaking and dissolving device; meanwhile, a viscosity reducer is injected into a liquid inlet pipe of the aerosol heavyoil shaking and dissolving device by a pumper, the nitrogen and the viscosity reducer are mixed and atomized to form aerosol in the aerosol heavy oil shaking and dissolving device to be pumped into downhole; and after injection is completed, a well is shut in and soaked, and after the aerosol fully reacts with an oil reservoir, the well is opened for production. The aerosol heavy oil shaking and dissolving device is applied to the oil and gas field exploitation process, the nitrogen and chemical agents into the well are atomized to squeeze and inject into an oil layer of an oil well to ensurenormal production of the oil well through a ground aerosol generator.

The invention discloses a high-pressure-bearing plugging agent for an oil extraction casing pipe and a processing technology thereof. The high-pressure-bearing plugging agent for an oil extraction casing pipe comprises 48-60 parts of MOFs-modified epoxy resin, 23-27 parts of solid particles, 17-21 parts of a curing agent, 13-17 parts of a coupling agent and 0.7-1.2 parts of a curing regulator. TheMOFs-modified epoxy resin is prepared from bisphenol A epoxy resin, nano silicon nitride, an acrylate monomer, methacrylic acid, acrylonitrile, hydroxyl-terminated nitrile rubber powder and an MOFs material through multistage reaction, the modified epoxy resin is crosslinked with the curing agent and the solid particles to form the plugging agent, and the plugging agent has the advantages of highmechanical strength, strong pressure bearing capacity, high thermal stability, salt and alkali resistance and capability of slowly expanding when meeting water to enhance the sealing property. The plugging agent acts on an oil extraction casing pipe, can effectively plug leakage layers such as pores and cracks, and can extrude to prevent leakage.

The invention discloses an embolism microsphere, a preparation method thereof and a drug-loaded embolism microsphere, and belongs to the field of medical materials. The preparation method of the embolism microspheres comprises the following steps: forming liquid drops from an aqueous solution containing a polyhydroxy polymer and a cross-linking agent under the electrostatic action, dripping the liquid drops into a collecting solution, dehydrating to obtain a microsphere primary product, and performing cross-linking reaction on the microsphere primary product to obtain the embolism microspheres. According to the preparation method, the size of the embolism microspheres can be accurately regulated and controlled within a proper range, and the prepared embolism microspheres can stably exist in water.

The invention provides a method for determining an organic chrominum cross-linkage gel system based on low molecular weight high concentration polymers, comprising steps of: selecting chromium acetate as a primary cross-linking agent; selecting high concentration polymers having a low molecular weight of 4 million as raw materials of profile control agents; For the high concentration polymers having a low molecular weight of 4 million, the concentration is 0.6 to 0.8 percent; the concentration ratio between the high concentration polymers and the first cross-linking agent is 25:1 to 35:1; the intensity of formed gel is 190 to 200mPa.s. The invention has a strong selectivity and is simple in a construction process, moreover the invention can neither bring permanent damage to stratums nor obstruct the performing of later measures.

The invention discloses a double-waterproof composite roof which comprises a reinforced concrete face plate, a cement mortar leveling layer, a flexible waterproof layer, a foam concrete layer and an inorganic permeable crystalline waterproof mortar protective layer. The reinforced concrete face plate, the cement mortar leveling layer, the flexible waterproof layer, the foam concrete layer and theinorganic permeable crystalline waterproof mortar protective layer are sequentially flatly laid and overlaid; chemical reaction can be carried out on mortar of the inorganic permeable crystalline waterproof mortar protective layer and free alkali in the foam concrete layer to generate stable permeable crystal substances, the permeable crystal substances can be permeated into concrete crack of theconcrete layer, and particular molecular structures of the permeable crystal substances are [Ca(O-R-OH)2]. The double-waterproof composite roof has the advantages that the waterproof ability and the heat-insulation capability of the building roof can be improved, and the service life of the double-waterproof composite roof can be prolonged.

A starting method for an aluminum electrobath relates to aluminum electrobath starting, in particular to a large starting method which includes being charged into a furnace, baking and starting process. The method is characterized in that: a, the material components which are added when being charged into the furnace are 7 to 8 percent of added calcined soda, 9 to 10 percent of calcium fluoride, 5 to 6 percent of magnesium fluoride, 19 to 20 percent of electrolyte blocks and the rest percent of high molecular ratio cryolite; b, the starting process is to add the high molecular ratio cryolite with an amount of 3 to 4 times as that of the high molecular ratio cryolite used for being charged into the furnace in the electrobath, to add the calcium fluoride with an amount of 19 to 20 percent of that of the calcium fluoride used for being charged into the furnace, to add the magnesium fluoride with an amount of 32 to 34 percent of that of the magnesium fluoride used for being charged into the furnace, to add the calcined soda with an amount of 23 to 25 percent of that of the calcined soda used for being charged into the furnace and to add the electrolyte blocks with an amount of 1.4 to 1.6 times as that of the electrolyte blocks used for being charged into the furnace. The method of the invention adopts the high molecular ratio cryolite and reduces the amount of the calcined soda, thus being able to lead the molecular ratio to be more than 2.8 after starting the electrobath, improving the stability of the technique technology conditions and reducing the working intensity of workers.

The invention relates to an anode covering material for aluminum electrolysis. The material comprises the following components of, by mass, 35-40% of aluminum oxide, 18-25% of aluminum fluoride, 35-47% of a mixture of sodium fluoride and calcium fluoride, wherein the mass ratio of the anode covering material with the particle size of 10-50 mm to the particle size less than 10 mm is 3 to 2. According to the material, the anode covering material for the aluminum electrolysis can improve the conductivity of aluminum electrolyte so as to promote the bonding and curing of the fluorine-containing solid particles.

The invention relates to a concrete additive, in particular to a concrete surface reinforcement repair agent. The concrete surface reinforcement repair agent is composed of the following substances inpercentages by weight: 40% to 60% of methacrylic acid-methyl acrylate polymer, 20% to 40% of deionized water, 0.4% to 0.6% of carboxylic acid, 4% to 6% of colloid silicon oxide, 2% to 4% of magnesiumstearate, 8% to 12% of coal ash, 0.4% to 0.6% of silicate and 1% to 2% of anhydrite. The concrete surface reinforcement repair agent disclosed by the invention can be quickly permeated to the interior of concrete to reach the effect of effectively improving the using strength of concrete.

The invention relates to lightweight waterproof concrete blocks used in a river channel and a preparation method of the concrete blocks, and belongs to the technical field of river control engineering. The lightweight waterproof concrete blocks comprise the following raw materials: water, cement, crushed stone, ceramsite, mineral slag powder, fly ash and a composite waterproof admixture, wherein the composite waterproof admixture comprises the following materials: water, a water reducing agent, sodium methylsiliconate, sodium dodecyl sulfonate, heavy calcium carbonate, calcium acrylate, calcium hydroxide, sodium silicate, silica fume, nano aluminum oxide, titanium dioxide, pozzolan and polypropylene fibers; and the method comprises the following steps: performing mixing, performing compression moulding, performing maintenance for multiple times, and performing cutting to obtain the lightweight waterproof concrete blocks. The lightweight waterproof concrete blocks used in the river channel provided by the invention not only have the advantages of good water resistance, good compactness and higher strength, but also have the advantages of a light mass and a low price; and an occurrence of cracking generated at the surface during preparation is reduced, the finished-product rate is improved, and the concrete blocks are suitable for gabions in river channel revetment construction.

The invention discloses polypropylene crosslinking copolymer fiber concrete leaking stoppage paste which comprises earlier-stage leaking stoppage paste and later-stage leaking stoppage paste. The earlier-stage leaking stoppage paste is composed of the following components of, by weight, 3 to 5 parts of a composite filling agent, 4 to 5 parts of a composite reinforcement agent, 2.5 to 3 parts of sodium polyacrylate crosslinking copolymer particles, 5 to 6 parts of flax fibers, 0.5 to 1 part of saw powder and 80 to 85 parts of water. The later-stage leaking stoppage paste is composed of the following components of, by weight, 20 to 30 parts of silicate cement, 5 to 10 parts of sodium polyacrylate crosslinking copolymer particles, 5 to 15 parts of flax fibers, 15 to 20 parts of medium sand and 5 to 10 parts of water. According to the leaking stoppage paste, a bridge connection leaking stoppage method and a chemical leaking stoppage method are combined, leaking stoppage risks are reduced, the leaking stoppage effect is improved, and meanwhile cost is low.

The invention discloses an expansive fiber crack-resistant waterproofing agent for concrete and a preparation method thereof, belonging to the technical field of concrete admixture production; and the expansive fiber crack-resistant waterproofing agent comprises the following components in%age by weight: 15-25% of wollastonite powder, 20-32% of coal gangue powder, 30-40% of pyrophyllite powder, 15-25% of desulfurized gypsum and 3-10% of cellulose fiber. According to the invention, through the synergistic effect of the desulfurizing gypsum, the coal gangue, the pyrophyllite, the cellulose fiber and the like, the compactness of the concrete is effectively enhanced, capillary pores are reduced, and the impermeability, corrosion resistance and bending resistance are greatly improved.

The invention belongs to the technical field of petroleum, and particularly relates to a profile control agent with a fired-coal waste residue and a profile control method. The profile control agent is prepared from two parts of a high-permeation oil layer profile control agent and a medium-permeation oil layer profile control agent, wherein, in percentage by weight, the high-permeation oil layerprofile control agent is prepared from 70 to 80 percent of the fired-coal waste residue with a mesh number of 50 to 100 meshes, 10 to 20 percent of high molecular polymer, 0.5 to 1.0 percent of cross-linking agent, 0.05 to 0.08 percent of stabilizing agent and the balance of water; the medium-permeation oil layer profile control agent is prepared from 40 to 50 percent of the fired-coal waste residue with a mesh number of 100 to 150 meshes, 5 to 10 percent of thickening agent, 1 to 2 percent of dispersing agent, 0.1 to 0.2 percent of pH regulator and the balance of water. The profile control agent with the fired-coal waste residue, which is provided by the invention, has the characteristics of being good in stable performance, high in plugging intensity, high in profile-control success rate, long in valid period and good in production increment effect and can be used for meeting the profile control demand of oil reservoirs with different permeation rates; meanwhile, the profile controlagent is used for effectively solving the problem of environmental pollution caused by the external discharge and the landfill of fired-coal waste and therefore, the profile control agent can be widely applied to the resource treatment of the fired-coal waste residue and the water shutoff and profile control processes of oil and water well.

The invention discloses a quantitative sub-packaging device for raw material masterbatches and used for cable machining. The quantitative sub-packaging device for the raw material masterbatches and used for cable machining comprises a support box and a falling funnel, wherein a falling hole is formed in the top end of the support box; the falling funnel is fixedly connected to the position of thefalling hole in the top end of the support box; an opening is formed in one side of the support box; a measurement box is fixedly connected to the inner wall of the top end of the support box and to the position of the falling hole; a thread hole is formed in one side close to the opening, of the measurement box; a thread rod is installed in the thread hole through a thread; one end of the threadrod extends into the measurement box and is rotationally connected with a vertically-arranged adjustment baffle; a guide hole is further formed in the measurement box; and a guide rod is fixedly connected to one side close to the opening, of the adjustment baffle. The quantitative sub-packaging device for the raw material masterbatches and used for cable machining is ingenious in structure, capable of completing quantitative sub-packaging for the masterbatches, simple and convenient to operate, and low in measurement error; bag openings do not need to be manually expanded, so that the labor issaved; and moreover, the device is capable of measuring the masterbatches with different volumes and numbers through adjustment, and wider in use scene.

The invention discloses a fishable free falling tubing plug. The improvement is performed on the basis of a ZL201420608036.3 patent, the deformation of an expansion rubber tube is produced after being pressed and the diameter of the expansion rubber tube is increased through the pressure medium energy in an underground tubing, a reliable sealing structure is formed between the expansion rubber tube and an inner hole of the tubing, and the effect plugging is performed on the tubing. The sealing of the plug cannot be affected by the reduction of the external pressure due to the characteristic of the band direction sliding of an open thread locking block. The anchoring with the wall of the inner hole of the tubing is implemented due to the matching of an inclined wedge type slide column and a sliding block slip. Only a fishing head needs to be pulled upward to open a pressure channel when the fishing is required, a protection pressure sleeve and the sliding block slip are driven by the fishing head to move upward relative to the slide column through an underground pressure medium, and accordingly the unlocking is implemented. The effective plugging can be performed on the tubing and the fishable free falling tubing plug can be taken out of the tubing conveniently.

The invention relates to a sealing charcoal adhesive used in blast furnace and ferroalloy electric furnace, and especially relates to a micro-expansion pressed-in charcoal adhesive applied between a blast furnace bottom hearth and a cooling device, and between a ferroalloy electric furnace graphite lining and furnace housing. The charcoal adhesive comprises the raw materials of, by weight, 45-65 parts of expansion graphite, 5-25 parts of tar, 1-10 parts of aluminum powder, and 3-30 parts of thermoplastic phenolic resin. During long-time application in blast furnace and electric furnace low-temperature sections, heat can be effectively conducted, in-furnace coal gas communication can be prevented, furnace lining cooling capacity can be improved, charcoal brick lining corrosion speed can be reduced, and entire furnace lining service life can be prolonged.