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32results about How to "Gelling" patented technology

Method for preparing hydraulic cementing material by utilizing sulfur fixation ash

InactiveCN102617058AHigh strengthSlurry expansion rate is smallCement productionFinenessSubgrade
The invention discloses a method for preparing a hydraulic cementing material by utilizing sulfur fixation ash. The method is characterized by comprising the following steps of grinding raw materials, namely grinding the sulfur fixation ash serving as a raw material until the fineness (d50) of the sulfur fixation ash is less than or equal to 14 mu_m, and grinding calcined lime serving as another raw material until the fineness of the calcined lime is 80 mu_m and the screening residue of a standard screen is less than or equal to 10 percent; burdening, namely taking the raw materials according to a proportion that every 100 parts by weight of sulfur fixation ash is doped with 3 to 14 parts by weight of calcined lime or slaked lime or 1 to 3 parts by weight of CaSO4.2H2O; mixing the raw materials, namely uniformly mixing and stirring the raw materials, thus obtaining the hydraulic cementing material. According to the method, waste is turned into wealth, so that environment pollution is reduced; and the hydraulic cementing material prepared by the method can be used as a component of cement concrete, artificial aggregate, a steamed building block, a filling structure and a roadbed and has the advantage of high performance.
Owner:SOUTHWEAT UNIV OF SCI & TECH

A low bleeding rate pumpable phosphogypsum and yellow phosphorus slag filling paste and its preparation method

The invention relates to a low-bleeding-rate pumpable phosphogypsum and yellow phosphorus slag filling paste and a preparation method of the paste. The paste is prepared by adding a certain percentage of yellow phosphorus slag as a cementing material into industrial waste residue phosphogypsum as a filling aggregate, calculating the required amount of water according to the target concentration on the basis that the natural moisture content of the phosphogypsum is determined, adding water and stirring. The filling paste has the advantages of precise concentration control, relatively low bleeding rate, relatively good fluidity, certain early strength and relatively good middle-term strength and long-term strength, and is used for the paste filling of phosphorite underground mined-out areas; the bleeding rate of slurry for phosphogypsum underground cementing filling is reduced, cost of underground drainage and filling is lowered and the pollution to the mine water environment is reduced. According to the invention, the industrial waste residue phosphogypsum and yellow phosphorus slag can be fully and effectively utilized, requirements on filling operation of phosphorus resource mining are met, the production capacity of a mine is enlarged, economic benefits are increased, the ground accumulation of industrial waste residue is reduced, the occupancy rate of land is lowered and the secondary pollution of filling wastewater to the environment can be effectively reduced.
Owner:CENT SOUTH UNIV

High-performance roadway wall back filling layer material taking pretreated phosphogypsum as aggregate

The invention belongs to the technical field of roadway wall back filling layers and solid waste recycling, and discloses a high-performance roadway wall back filling layer material with pretreated phosphogypsum as aggregate. According to the ardealite backfill material, ardealite which is pretreated after being dried for 8 hours at the temperature of 130 DEG C is used as aggregate, slag and carbide slag are added, the mixture is stirred with tap water, and no other additive is added. The ardealite, the slag and the carbide slag pretreated by the aggregate used by the wall back filling layer material respectively account for 65-75%, 20-25% and 5-10% of the total solid mass. The ardealite wall back filling layer manufactured according to the mixing ratio can meet the compressive strength requirement, the fluidity requirement and the water permeability requirement of the wall back filling layer in a roadway composite support system, and has the advantages of being low in cost and easy and convenient to manufacture. Meanwhile, the problem that a large amount of industrial solid wastes such as ardealite and the like are accumulated is solved, land resource pressure is released, contribution is made to environmental protection, and certain practical significance is achieved.
Owner:LIAONING TECHNICAL UNIVERSITY

Method for treating acid chromium-contained polluted waste water with molten iron residues as raw material

The invention relates to the field of heavy metal pollution treatment, in particular to new application of molten iron residues in the field of treating polluted waste water. The method for treating acid chromium-contained polluted waste water with molten iron residues as raw material includes the following steps that 1, molten iron residues are added to acid chromium-contained polluted waste water; 2, after the molten iron residues and the acid chromium-contained polluted waste water are mixed to react with each other for 12 hours to 36 hours, the treated waste water is discharged directly, the molten iron residues precipitated at the bottom and Cr (OH) 3 sediment are collected and recycled. The method for treating acid chromium-contained polluted waste water with molten iron residues as raw material provides a new way for acid chromium-contained polluted waste water treatment and comprehensive utilization of the molten iron residues.
Owner:SHANGHAI MCC ENVIRONMENTAL ENG TECH CO LTD +1

A treatment process of nickel slag in the process of nickel slag concrete processing

The invention discloses a nickel slag processing technology in a nickel slag concrete manufacturing process. The processing technology specifically comprises the steps of powder grinding and refining treatment, hydration activity treatment and durability treatment. The processing technology has the advantages that abrasion of iron to a roller press can be effectively reduced via a novel high efficient powder grinding and demagnetizing mechanism, the service life of the roller press can be prolonged, and iron content in the nickel slag can be effectively removed via two times of deironing; due to the mode of introducing nickel stream into a high-temperature vacuum furnace, and sieving nickel powder, particle diameters of the nickel powder can be effectively controlled, the condition that the nickel slag has uniform powder particle size is ensured, and thus quality of subsequently manufactured nickel slag concrete can be further improved; formation of hydration products under a hydrothermal condition is facilitated by adjusting a CaO/SiO2 ratio, the composition of the nickel slag and kaoline and the hydrothermal condition and by using a seed crystal technology, and thus hydrate with gelling property can be acquired; minerals such as tobermorite and Mg(OH)2 are formed by using the high temperature and high pressure hydrothermal technology, and thus MgO content is effectively reduced, and durability of the nickel slag concrete is improved.
Owner:江苏中鼎建材集团有限公司

Technological method for producing water permeable bricks through dry slag

InactiveCN109400119AGood water permeabilityIncreased strength and bearing capacityCeramic materials productionCeramicwareAdhesiveEmbryo
The invention discloses a technological method for producing water permeable bricks through dry slag. The technological method includes the following steps that firstly, raw materials are selected; secondly, the raw materials are pretreated; thirdly, mixing and stirring are conducted; fourthly, brick embryos are produced; fifthly, high sintering is conducted; sixthly, stacking and piling are conducted; and seventhly, curing is conducted, and wherein in the step one, the dry slag, adhesives, quartz, fine powder, white cement, permeable fibers, silica sand and mineral color powder are selected as the raw materials. According to the technological method for producing the water permeable bricks through the dry slag, the water permeable bricks are produced by the raw materials of the selected dry slag, the adhesives, the quartz, the fine powder, the white cement, the permeable fibers, the silica sand and the mineral color powder, the water permeability is good, the strength and bearing capacity are high, the water permeable bricks with different colors can be made according to different mineral color powder, and the color is rich; and in the production process, the steps are simple, thedry slag is effectively reused, environmental pollution is lowered, the production cost is effectively lowered, and the production efficiency is improved.
Owner:贵州瑞泰实业有限公司
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