55results about How to "Increase the amount of liquid phase" patented technology

The invention discloses a production method of a readily available and controlled release composite fertilizer containing three nitrogen elements. The production method is as follows: raw materials containing nitric nitrogen, ammonium nitrogen and amido nitrogen are added in materials; in order to prevent that urea reacts with nitro phosphate fertilizer to generate too much urea nitrate and the production can not performed, ammonia gas is introduced in the granulation process according to different proportions to ammonify nitro phosphate fertilizer, reduce the generation of urea nitrate and increase the neutralization degree of monoammonium phosphate; and powdery fundamental fertilizers containing nitrogen, phosphorous and potassium are added to granulate, and then the composite fertilizer can be obtained through drying, cooling, screening and coating. In the production method of the invention, a lot of heat generated in the thermolysis of the nitro phosphate fertilizer and the neutralization heat of the reaction of ammonia gas and monoammonium phosphate are fully utilized to heat materials and increase the granulation temperature; and the viscosity of urea nitrate is utilized, the solubility of ammonium phosphate salt is increased, the quantity of the liquid phase for granulation can be satisfied, higher granulation rate can be realized without using other adhesive, the cost is reduced, the water content of the granulation material is significantly reduced, the drying energy consumption can be reduced and a large amount of energy consumption can be saved.

The invention provides a chromium-iron mineral powder sintering method for stainless steel production. According to the chromium-iron mineral powder sintering method, pelletization and sintering are carried out after laterite is added to chromium-iron mineral powder; as the laterite and water have good wetting property, the laterite serving as nucleation particles and the chromium-iron mineral powder adhere to each other and grow, and then are pelletized and clustered in a pelletization process, thus solving the problem that the chromium-iron mineral powder is difficult in pelletizaiton; simultaneously, the sintering temperature of chromite can be reduced due to the addition of the laterite, the amount of a liquid phase is increased, the energy consumption is reduced, the rate of finished product and the strength of a sinter are increased, and the problems of difficulty in sintering of the chromium-iron mineral powder, high content of mixed carbon and high energy consumption in the prior art are solved; as compositions of the laterite are similar to that of a smelting slag system, follow-up smelting and slagging working procedures for stainless steel production are not added, the price is relatively low, and the total cost of the stainless steel production can be effectively reduced; and the chromium-iron mineral powder sintering method has the advantages of increasing the economic benefits of enterprises and relieving the energy saving and emission reduction pressure of the enterprises.

The invention discloses road silicate cement clinker on the basis of industrial waste residues and a method for preparing the road silicate cement clinker. The road silicate cement clinker comprises nickel slag, calcium carbide residues, zirconium-containing silica residues, bauxite tailing, desulfurization gypsum and mineralizers. The method includes mixing, grinding and homogenizing the nickel slag, the calcium carbide residues, the zirconium-containing silica residues, the bauxite tailing, the desulfurization gypsum and the mineralizers to obtain cement raw materials; preheating the cementraw materials, then calcining the cement raw materials under the condition of the temperature of 1280-1350 DEG C for 30-35 min and then carrying out cooling to obtain the road silicate cement clinker.The road silicate cement clinker and the method have the advantages that the 28 d compressive strength of the road silicate cement clinker can reach 63.9-75.2 MPa, the strength grade of the road silicate cement clinker can reach 62.5 grade, the 28 d breaking strength of the road silicate cement clinker can reach 9.8-18.2 MPa, the 28 d mortar abrasion loss of the road silicate cement clinker is lower than 2.5 kg/m<2>, cement is high in stability, and the road silicate cement clinker is high in abrasion resistance and excellent in work performance; the method is simple, complicated working procedures can be omitted, and the road silicate cement clinker and the method are low in cost.

The invention discloses a method for preparing a porous ceramsite filter material by using lepidolite extracted lithium slag. The lithium slag extracted by a lepidolite sodium chloride pressure digestion method is used as a main raw material. The method comprises the following steps of: adding partial ground clay powder serving as a plasticizer, adulterating a little amount of pore forming agent (one or two of carbon powder, bran powder, calcium carbonate powder and waste glass powder), balling, sintering and sintering. The filter material has the characteristics of low stacking density, high porosity, uniform pore distribution, high cylinder pressure strength and long service life. The method can simplify the production process and reduce the production cost, is favorable for pollution-free production of a lepidolite mineral lithium extracting process, and has significance for resource recycle and environmental friendliness.

The invention discloses a manufacturing process of a high-temperature resistant nixing pottery. The manufacturing process comprises the steps of preparing a preform body, moulding, finishing, drying and calcining the preform body, and is characterized in that the preform body comprises the following materials in parts by weight: 5-6 parts of white mud, 4-5 parts of purple mud, 1.5-2 parts of TiO2, and 1.5-2 parts of MgO. A high-temperature resistant nixing pottery vessel prepared from the high-temperature resistant nixing pottery has the advantages of excellent spalling resistance and better mechanical strength, can be directly used on various heat sources, does not crack after being used for a long period of time, and meets the requirements of the fine ceramic cookware standard QB/T2580-2002.

The invention provides a composite additive for strengthening high magnesium-type laterite-nickel ore direct reduction and an application of the composite additive. The composite additive comprises, by weight, 25-35% of desulphurization gypsum, 20-30% of sodium carbonate, 10-15% of sodium humate, 10-15% of polyacrylamide, 5-10% of coal powder, 5-10% of calcium oxide and 1-5% of iron powder. According to the composite additive for strengthening high magnesium-type laterite-nickel ore direct reduction, high-nickel concentrate can be prepared from high magnesium-type middle-low grade laterite-nickel ore and can be applied to direct reduction of high magnesium-type laterite-nickel ore. The application method of the composite additive comprises the steps that laterite-nickel ore and the composite additive are mixed, and a fresh pellet is obtained through pelletizing; the fresh pellet is dried, so that the fresh pellet is solidified to be a dried pellet, wherein the strength of the dried pellet exceeds 300 N; the dried pellet is placed into a rotary kiln, reduction coal is added into the rotary kiln to conduct segmented reduction, and a reduced product is obtained; and after water quenching and splat cooling are conducted on the reduced product, crushing ball-milling and wet magnetic separation are conducted, and high nickel iron ore concentrate is obtained.

The present invention discloses process of preparing Portland cement with waste ceramic tile polishing material. Portland cement clinker in 77-84 wt%, setting retarder gypsum in 3-6 wt% and mixed material in 10-20 wt% are mixed and ball milled in a ball mill to form Portland cement of specific surface area 350 sq m/kg, where the mixed material comprising waste ceramic tile polishing material of 3-6 wt%, mineral slag of 4-8 wt% and flyash of 3-6 wt%. Using waste ceramic tile polishing material as partial material for Portland cement can dispose waste, save resource and raise production efficiency.

The invention provides a production method of sintered ores. The production method comprises the following steps: taking the following raw materials: 70-85% of iron ore powder, 5-10% of steel slag, 5-15% of boron-containing iron ore powder, 3-6% of coke powder or pulverized coal and 1-5% of SiC powder; adjusting the alkalinity of sintered ores as ingredients to be 1.8-2.2 by adding limestone and quick lime; feeding a mixture formed by mixing iron ore powder, steel slag, boron-containing iron ore powder and coke powder or pulverized coal uniformly into a drum mixer, adding the SiC powder after pellets are formed, enabling the SiC powder to uniformly wrap the surfaces of the mixture pellets, and finally distributing the materials, thus completing production of the sintered ores. The production method has the beneficial effects that environments with higher alkalinity than the finished sintered ores can be formed inside the sintered ores, and the indexes such as reduction degradation and the like of the sintered ores can be improved, so that the low-temperature reduction degradation index RDI+3.15 is 83.73% and the low-temperature reduction degradation index RDI-0.15 is 4.16%; meanwhile, the metallurgical performance and cold and hot strength of the sintered ores can be substantially improved, the drum strength of the sintered ores is 83.13%, and the fuel consumption of the sintered ores can be reduced.

The invention relates to a mineralizer for cement production, and in particular, relates to a composite mineralizer for barium calcium phosphoaluminate cement. The composite mineralizer for the barium calcium phosphoaluminate cement comprises the main chemical components by the mass percentage: 20-54% of Fe2O3, 13.5-33.3% of SO3, 13.5-20.8% of MgO, 5-10.4% of CaF2, and 13.5-16.5% of Na2O or K2O, wherein the mixing mass percentage of the composite mineralizer in a barium calcium phosphoaluminate cement raw material is 1.25-10%. According to the composite mineralizer, SO3 comes from a variety of industrial waste gypsums, MgO comes from high-magnesium limestone, Fe2O3 comes from steel slag, and Na2O or K2O comes from cement main raw material impurities. According to the composite mineralizer for the barium calcium phosphoaluminate cement, cement clinker formation is promoted by introducing the compound mineralizer, the calcination temperature is reduced by 150-200 DEG C, the formation of a main mineral phase barium calcium phosphoaluminate is significantly promoted, a conventional rotary kiln production line can be applied to production of the barium calcium phosphoaluminate cement, the large-scale production is facilitated, and energy saving and consumption reduction of the production process are achieved.

The invention relates to a treatment method for construction residue soil in construction waste. The method comprises the following steps: performing material separation on the construction waste to obtain the construction residue soil, detecting a chemical component content of the obtained construction residue soil, performing preparation to obtain a cement raw material including limestone, the construction residue soil, an iron raw material and sandstone, enabling a saturation ratio of the cement raw material to be 0.8-1.0, a silicon ratio to be 1.9-2.5 and an aluminum ratio to be 1.3-1.9, and producing cement clinker. The treatment method for the construction residue soil in the construction waste provided by the invention can continuously and effectively utilize the construction residue soil in the construction waste and is almost not limited by generation time and regions of the construction waste of each batch, and after high-temperature calcination is performed to form the cement clinker, harmful substances mixed in the construction residue soil are solidified in the cement clinker and do not cause harm to the environment and humans, and cement products produced by the method are qualified.

The invention discloses a fabrication process of low expansion Nixing pottery. The process comprises the steps of blank preparation, blank forming, blank trimming, blank stoving and blank firing. The process of low expansion Nixing pottery is characterized in that the blank prepared from, by weight, 5-6 parts of east mud, 4-5 parts of west mud, 0.5-1 part of NiO, 1.5-2 parts of TiO2 and 1.5-2 parts of MgO. The Nixing dishes prepared through the fabrication process of low expansion Nixing pottery have the advantages of excellent thermal shock resistance, good mechanical strength and capable of being used in various heat sources directly without cracking even after being used for a long period. The Nixing pottery dishes prepared through the process of low expansion Nixing pottery can meet the requirements of QB/T2580-2002 <Fine ceramic cookware>.

The invention relates to the technical field of paint and in particular relates to fireproof paint. The fireproof paint comprises the following raw materials in parts by weight: 35-50 parts of diphenylether-formaldehyde resins, 16-27 parts of modified expanded graphite, 12-17 parts of perlite powder, 7-12 parts of yttria powder, 5-9 parts of aluminum dihydrogen tripolyphosphate, 2-6 parts of cellulose acetate, 8-15 parts of ortho-xylene, 5-12 parts of a film-forming agent, 3-9 parts of pentaerythritol, 0.3-1.5 parts of a coupling agent, 1.5-4.5 parts of an antifoaming agent, 0.2-0.6 part of awetting agent, 1.5-2.5 parts of a stabilizer and 0.2-0.7 part of microgel. The fireproof paint disclosed by the invention has excellent fire resistance.

The invention relates to a V2AlC block material synthesized by microwave sintering and a preparation method thereof. The method comprises the following steps: weighing vanadium powder, aluminum powder and graphite powder according to a molar ratio of V:Al:C of 2:(1.1-1.4):1; a sintering aid LaF3 or CeF3 is added; adding the powder into absolute ethyl alcohol, grinding for 30 minutes by using a quartz mortar, and carrying out vacuum drying for 5 hours at the temperature of 50 DEG C to obtain a mixed raw material; placing the mixed raw materials in a steel grinding tool to be pressed for 60 s under the pressure of 240 MPa, and forming a cylindrical blank; and putting the pressed blank into a microwave sintering device, heating the material to 1250 DEG C in an argon atmosphere, preserving heat for 5 minutes, and cooling the material to obtain the V2AlC block material.

The invention belongs to the technical field of iron ore sintering, and particularly relates to a sintering mixture and a mixing method, sintering ore and a sintering method. The sintering mixture comprises the following components in parts by weight: 90-110 parts of iron ore powder to be sintered, 14-20 parts of returned ore A, 8.5-10.5 parts of returned ore B, 2-4 parts of coke powder, 7-9 partsof quicklime and 6.5-8.5 parts of adhesives, wherein the particle size of the returned ore A is 1-2 mm, and the particle size of the returned ore B is 2.5-5 mm. Through adding the adhesives with an adhesive effect and the returned ore A and the returned ore B with specific particle sizes to the sintered mixture, the particle size and particle structure of the sintering mixture are further improved, so that microparticles with the returned ore as cores are formed, the air permeability of a material layer is greatly improved, the sintering requirement of an ultra-thick material layer of 1000 mmor above is fully met, and the air permeability and the vertical combustion speed of a sintering material layer, and the output and yield of the sintering ore are all improved to various degrees.

The invention belongs to the technical field of new materials, in particular to a non-fluorite mineralizer applicable to production of white Portland cement and a preparation method thereof. The non-fluorite mineralizer applicable to production of white Portland cement comprises barium oxide, phosphorus pentoxide, magnesium oxide, Portland cement main elements and a small amount of other trace elements. The effective components in the mineralizer are introduced from different industrial waste residues, barium oxide is introduced from low-iron barium slag, phosphorus pentoxide is introduced from phosphorus slag, and magnesium oxide is introduced from white slag. Calcium oxide, silicon oxide and aluminum oxide are main components in the three waste residues, and other trace elements comprisesulfate, chloride and the like. The invention provides the non-fluorite mineralizer applicable to production of white portland cement, which is low in cost, easy to obtain and excellent in performance, and can effectively reduce the production cost of products and improve the performance of the products, and the preparation method thereof.