130 results about "Alkali activated slag" patented technology

The present invention belongs to the field of resource utilization of building materials and solid waste, and relates to a red-mud-based cementing material based on efficient drying, component homogenization and activity improvement, and a preparation method therefor. The preparation method comprises: adding a filter aid to red mud to carry out sedimentation, then subjecting same to filter pressing until the water content is 14-16%, then drying the solid material, which has been subjected to filter pressing, until the water content is 4% or below, and finally grinding same to obtain the product. The filter aid comprises the following raw materials: 10-30 parts of polyaluminum chloride, 5-15 parts of polyaluminum sulfate, 1000-1200 parts of blast furnace slag or fly ash, 700-900 parts of steel slag, 400-600 parts of carbide slag or alkaline residues, and 300-400 parts of desulfurized gypsum or phosphogypsum or fluorgypsum. By means of the present invention, the dehydration efficiency of red mud can be improved, the red-mud-based cementing material can also be prepared in one step; the preparation process for the red-mud-based cementing material is simplified; and the prepared red-mud-based cementing material has the advantages of a high mechanical strength, high durability and erosion resistance.

The invention discloses a cementing material for a solid waste-based road of a coal-fired power plant and a preparation method of the cementing material. The cementing material mainly comprises a cementing component, an alkali-activated component and a reinforcing component, the gelling component is a mixture of coal-fired power plant fly ash and furnace slag; the alkali-activated component is a mixture of alkali residues, red mud, blast furnace slag and coal-fired power plant desulfurized gypsum; the reinforcing component is rice hull ash or peanut hull ash. The mass ratio of the gelling component to the alkali-activated component is (4 / 1)-(10 / 1); and the addition amount of the reinforcing component is 1-3% of that of the main body material. The coal-fired power plant solid waste fly ash, the furnace slag and the desulfurized gypsum are used as main bodies, a small amount of other industrial solid waste is added, and the cementing material belongs to a full-solid-waste low-carbon cementing material and can be applied to a road base, a subbase or a base layer. The invention has the characteristics of low carbon emission, high solid waste consumption, simple production process and strong pavement performance, and in addition, the invention has a good stabilization effect on the problem that part of solid waste heavy metals and sulfate ions in a coal-fired power plant exceed the standard.

The invention relates to a curing agent for an iron tailing engineering backfill material and a use method of the curing agent. The curing agent is composed of Portland cement, calcium hydroxide, fly ash, modified superfine slag powder, alkaline residues and a sodium phosphate buffer system. And by adding the curing agent, the backfill material has excellent compressive strength, durability and permeability resistance. Due to the filling and interface enhancing effects of the modified superfine slag powder, the compactness of the material is remarkably improved, and the porosity and the permeability coefficient are reduced; the alkaline residues accelerate the curing reaction, and the freeze-thaw resistance of the material is improved. The method is suitable for various complex geological and environmental conditions, and the stability and safety of the backfill material in an extreme environment are ensured.

The invention discloses a preparation method of a mine filling material based on iron-rich solid waste and the obtained material.The preparation method comprises the steps that 5-30 parts by mass of steel slag powder, 40-50 parts by mass of copper slag powder, 5-20 parts by mass of red mud, 25-50 parts by mass of ferronickel slag powder, 10-12 parts by mass of carbide slag and 10-12 parts by mass of alkaline residues are subjected to dry mixing; then adding 10-15 parts by mass of water glass, 5-10 parts by mass of a water reducing agent, 5-10 parts by mass of a foaming agent and 10-40 parts by mass of water, mixing and stirring, and finally adding 100-250 parts by mass of tailings, and stirring again to obtain the mine filling material. According to the invention, various industrial wastes are utilized as resources and completely replace traditional cement raw materials, so that the production cost and carbon emission of the mine filling material are remarkably reduced, and the prepared mine filling material is good in compressive strength and improved in mechanical property.

The invention relates to the field of resource recycling, and discloses an iron slag ash and waste soil composite curing agent as well as a preparation method and application thereof. The composite curing agent comprises the following components in parts by weight: 30-50 parts of iron slag ash; 20 to 40 parts of waste soil; 10-20 parts of industrial alkaline residues; 5-10 parts of a functional auxiliary agent; 3-5 parts of a curing synergist; the curing synergist is composed of an inner core and a coating layer, the inner core material comprises a porous carrier and an exciting agent, and the film forming material of the coating layer is one or more of stearic acid, paraffin and polyethylene wax; the weight ratio of the core material to the coating layer material is (8-9): 1. According to the composite curing agent, resource utilization of waste is achieved, the material cost is remarkably reduced, and the composite curing agent is particularly suitable for flow-state backfilling, light filling and sludge in-situ curing and has remarkable environmental protection and economic benefits.

The invention relates to the technical field of cementing materials, in particular to a green high-performance solid-waste-based cementing material as well as a preparation method and application thereof. The green high-performance solid waste-based cementing material is prepared from the following raw materials in parts by weight: 15 to 25 parts of cement clinker, 15 to 25 parts of desulfurized gypsum, 0 to 5 parts of quick lime, 50 to 60 parts of superfine slag powder, 0 to 18 parts of red mud, 0 to 10 parts of manganese slag, 0 to 10 parts of carbide slag, 0 to 15 parts of fly ash, 0 to 10 parts of alkaline residue and 0 to 2 parts of exciting agent. According to the preparation process of the material, effective utilization of solid waste is realized, efficient resource conversion of the solid waste is promoted, and carbon dioxide emission in the high-energy-consumption clinker production process is remarkably reduced; other industrial wastes can be solidified in the production process, heavy metal polluted soil and wastewater are treated, energy consumption and pollution emission are reduced, and sustainable development of the building industry is facilitated.

The invention relates to the technical field of civil engineering materials, and particularly discloses alkaline residue-based fluidized stabilized soil and a manufacturing method thereof. According to the invention, solid wastes such as fly ash, blast furnace slag, vanadium tailings, aluminum slag and the like are selected and compounded with the alkaline residue, under the synergistic effect of the components, pores and cracks in the alkaline residue-based fluid-state solidified soil can be effectively filled, the defect of loose structure of the alkaline residue is overcome, a high-strength skeleton structure is formed, full cementing of all the components is realized, and the solid-state solidified soil has the advantages of high strength and high strength. And the whole material can have high strength, and the requirements of engineering construction can be fully met.

The invention discloses a method for increasing the recovery rate of lead fire refining alkaline residues. The temperature of the roasting furnace is set to be 580-650 DEG C, after the actual temperature reaches the set temperature, the refined alkaline residues are conveyed into the roasting furnace, the rotating speed of the roasting furnace is controlled to be 0.5-1 circle / min, the amount of blown air is 2-5 m < 3 > / min, the materials are subjected to oxidizing roasting in the roasting furnace for 30-60 min, the temperature is reduced to 30-50 DEG C, and roasted sand materials are obtained; detecting the roasted product material to obtain the content of the S element; the roasted sand materials and corresponding auxiliary materials are put into a smelting furnace in batches, the temperature in the furnace is controlled to be 900-1100 DEG C, the smelting time is 2-3 h, and produced lead bullion is discharged after the smelting time is up; the auxiliary materials are prepared according to the input amount of a single-batch roasted product material and the content of the S element. The recovery rate of lead, tin, antimony and copper in the pyrorefining alkaline residues can be effectively increased, and the cost of smelting auxiliary materials is reduced.

The invention relates to the technical field of civil engineering materials, and discloses a collapsible loess curing agent as well as a preparation method and a use method thereof. The collapsible loess curing agent is prepared from the following raw materials in parts by weight: 20-40 parts of slag powder, 10-20 parts of modified silica fume, 10-20 parts of biogel, 10-20 parts of desulfurized gypsum, 5-10 parts of polymer fibers, 10-30 parts of alkaline residues and 15-25 parts of cement, the components of the collapsible loess curing agent are adjusted, and on the basis of adding the cement, the collapsible loess curing agent is prepared from the following raw materials in parts by weight: 20-40 parts of slag powder, 10-20 parts of modified silica fume, 10-20 parts of biogel, 10-20 parts of desulfurized gypsum, 5-10 parts of polymer fibers, 10-30 parts of alkaline the slag powder, the desulfurized gypsum, the alkaline residues, the modified silica fume, the biological glue and the polymer fibers are synergistically matched, so that the permeability coefficient, the compressive strength and the breaking strength of the cured collapsible loess are remarkably improved, and the collapsible loess in northern areas such as Gansu, Xinjiang and the like has excellent impermeability and mechanical properties after being cured; the material can be used as a high-quality road building material.

The invention discloses a mixing design-based ratio optimization method for a multi-source solid waste cementing material containing alkaline residues, which is used for optimizing to obtain an optimal ratio of five solid waste components according to a preset cementing material performance target, the alkaline residues are used as an alkaline excitation component, a D optimal mixing design method is adopted to determine a test point, a three-order normative polynomial model is established, and the optimal ratio of the five solid waste components is obtained. Setting constraint conditions of each solid waste component, testing the three-day compressive strength and 28-day compressive strength of the neat paste for each test point, obtaining a first fitting model based on compressive strength response and a second fitting model based on response according to test data, and according to a preset performance target, the first fitting model and the second fitting model, calculating the compressive strength of the neat paste according to the first fitting model and the second fitting model. Solving through a multi-objective optimization algorithm to obtain an optimal proportion of five solid waste components; according to the method, the problems of low efficiency and high cost of a traditional trial and error method are solved, and scientization and standardization of the proportion design of the multi-source solid waste cementing material are realized.

The invention discloses a mixed roadbed filler prepared by compounding and cooperating multi-source solid waste materials with shield muck. The mixed roadbed filler is prepared from the following raw materials in parts by mass: 100 parts of shield muck, 3 parts of carbide slag / lime, 0-3 parts of fly ash, 0-3 parts of alkaline residues and 0-3 parts of desulfurized gypsum, according to the mixed roadbed filler, lime / carbide slag is used as a curing agent, fly ash, alkaline residues and desulfurized gypsum are used as additives, and a mixture with good strength and durability is formed after uniform stirring and compaction. The mixed filler is applied to roadbed backfilling, so that the shield muck and bulk solid wastes are recycled, and the mixed filler has important social and economic significance in reducing occupation of scarce land resources caused by industrial waste accumulation, reducing environmental pollution hazards and saving construction cost, and is simple in preparation engineering, easy in raw material obtaining and suitable for large-scale popularization and application. And popularization in engineering practice is facilitated.

The invention discloses a high-water-content large-dosage titanium gypsum-based flow-state curing material as well as a preparation method and application thereof, and belongs to the technical field of industrial solid waste resource utilization and building materials. According to the material, 50-70 parts of titanium gypsum, 15-30 parts of slag / fly ash and 5-15 parts of alkaline residue / carbide slag are used as main raw materials, and 0.1-1 part of xanthan gum is used as a flow state regulator as an auxiliary material. The material has high fluidity and self-compaction performance, the mechanical strength (7-day compressive strength is larger than or equal to 5 MPa) and the water stability (the water stability coefficient is larger than or equal to 0.7) of titanium gypsum can be remarkably improved, and meanwhile the leaching concentration of solidified heavy metal ions is lower than a standard value. The preparation method comprises the processes of raw material pretreatment, dry mixing, wet mixing and maintenance, is suitable for the fields of roadbed filling, building 3D printing, mine backfilling and the like, and realizes collaborative development of solid waste recycling and low-carbon building materials.

The invention provides homologous and isomeric alkaline residue-based fluidized stabilized soil as well as a preparation method and application thereof, and belongs to the technical field of solid waste resource utilization. The alkali residue-based curing agent is prepared from the alkali residue after filter pressing, the slag, the desulfurized fly ash, the fly ash and the cement. According to the method, high-water-content pasty raw alkali residues, alkali residues obtained after desalination and salt fixation and furnace slag are used as the alkali residue-based matrix soil. The homologous and isomeric alkaline residues are different in structure and form, so that the homologous and isomeric alkaline residues can be used as matrix soil on one hand, and can be used for preparing the curing agent on the other hand, and physical and chemical reaction and particle size matching among different components are promoted and improved, so that the mechanical property of the homologous and isomeric alkaline residue-based fluid-state solidified soil is improved. By adding a proper amount of water and water reducing agent, the fluidity of the homologous isomeric alkaline residue-based fluid-state solidified soil can be adjusted, the construction requirement can be met, and excellent dense pouring performance is achieved.

The invention discloses a solid-waste-based anti-seepage material as well as a preparation method and application thereof. The solid-waste-based anti-seepage material comprises the following components in parts by mass: 40-45 parts of coal gangue, 20-30 parts of blast furnace slag, 20-25 parts of lithium slag, 10-20 parts of alkaline residue and 5-10 parts of a modifier, through cooperation and modification of all the components, the anti-seepage effect on heavy metal percolation of the lithium slag storage yard is good, durability is good, and the influence on the surrounding and underground water environment can be reduced.

The invention discloses a high-antimony lead production process based on lead refining alkaline residues, and belongs to the technical field of lead bullion refining alkaline residues. Through carbonization treatment after urea intercalation and urea decomposition and escape, more pores and larger interlayer spacing are left, so that the specific surface area of anthracite is increased, porous anthracite is obtained, and the specific surface area of the anthracite is increased; the porous anthracite is subjected to secondary intercalation by using nano calcium oxide, the obtained modified porous anthracite is larger in interlayer spacing and larger in surface area, a large amount of nano calcium oxide is uniformly attached to the surface of the anthracite, the reaction activity is remarkably improved, and an enlarged pore structure is beneficial to gas diffusion, so that the reduction reaction efficiency of the anthracite is improved; the zeolite-based modified asphalt powder is used as a binder, and zeolite particles can fill micro pores and cracks in the asphalt, so that the void ratio is reduced, the compactness of the asphalt is improved, and the bonding strength is improved; the lead product prepared through the production technology is high in purity, the antimony recovery efficiency is high, meanwhile, the amount of generated slag is small, and the content of lead in the slag is low.

The invention discloses a multi-source solid waste-based cementing material and a preparation method thereof, and relates to the technical field of solidified organic matter soft soil cementing materials. The cementing material is prepared from the following raw materials: carbide slag, desulfurized fly ash, yellow phosphorus slag, high-activity and high-stability steel slag, modified red mud, alkaline residues, desulfurized gypsum, mineral slag and calcium sulphoaluminate; the high-activity and high-stability steel slag is prepared by carrying out steel slag preliminary stabilization treatment and steel slag excitation activation on liquid steel slag; exciting and activating the steel slag: preparing high-activity and high-stability steel slag from the stabilized steel slag, the modified ettringite particles, aluminum sulfate, a polycarboxylate superplasticizer, hexadecyl triethyl ammonium bromide and potassium hydroxide; the modified red mud is prepared from red mud, magnesium hydroxide, N-methyldiethanolamine, desulfurized fly ash, calcium oxide and a ferric chloride solution; the modified ettringite particles are prepared from polyvinyl alcohol and N-beta-aminoethyl-gamma-aminopropyl trimethoxy silane as a modifying agent. The preparation method comprises the following steps: preparing the modified ettringite particles; according to the multi-source solid waste-based cementing material, the compressive strength and the water stability coefficient of the solidified organic matter soft soil are effectively improved.

The invention relates to the technical field of building materials, and particularly discloses red-layer mudstone premixed flow-state solidified soil, a curing agent and a preparation method thereof.The curing agent is prepared from, by mass, 30 parts of ordinary Portland cement, 3-15 parts of sulphoaluminate cement, 3-15 parts of alkaline residue powder, 18-90 parts of composite mineral admixture and 5-8 parts of surfactant. 2-5 parts of a high-molecular polymer; the composite mineral admixture comprises the following components in parts by mass: 20 parts of lithium slag powder, 3-20 parts of magnesium slag powder and 5-15 parts of blast furnace ferronickel slag powder. The method has the advantages that the shrinkage strain is reduced on the premise that the fluidity and the early strength of the red-layer mudstone premixed flow-state solidified soil meet the construction requirements of the premixed flow-state solidified soil, and the engineering application performance of the red-layer mudstone is greatly improved.

The utility model discloses an alkaline residue slurry crushing device, which comprises a front-end stirring and crushing device, a plurality of variable-frequency and variable-speed motors, and a plurality of stirring and crushing devices, wherein the output end of each variable-frequency and variable-speed motor is connected with a spiral blade through a knife rest bearing; the rear end crushing device comprises a box body, a grinding tool bit is arranged in the box body, and a high-pressure nozzle is arranged in the box body; the screening device comprises a rotary screen used for communicating the bottom of the steel frame with the top of the box body, holes are uniformly distributed in the rotary screen, and a high-pressure spray head used for removing slag slurry particles adhered to the holes is arranged on the rotary screen; a screw conveyor; and an integrated control device. The utility model effectively solves the problem that the crushing device is adaptive to the alkaline residue treatment process, and fills the blank in the field of alkaline residue crushing devices; meanwhile, the problem that the equipment operation and maintenance cost is too high due to corrosion of the alkaline residues can be effectively solved, and the economical efficiency is high; an automatic control system is adopted, long-time continuous operation capacity is achieved, unattended operation can be achieved, and the requirement for large-scale treatment is met.

The present invention provides a treatment process for efficiently recovering indium from alkali slag, specifically comprising: S1, grinding and screening the alkali slag, and washing it with water to obtain a pretreated alkali slag; S2, placing the pretreated alkali slag into a reaction tank, adding an acid solution, and heating the reaction to obtain an acid leaching solution I; S3, adding the acid leaching solution to hydrogen peroxide for stirring and reacting, stopping the stirring, and allowing it to stand to obtain an acid leaching solution II; S4, adding water to the acid leaching solution II, followed by adding polyacrylamide for dispersion, filter pressing, and reducing with iron powder to obtain high-copper slag and acid leaching solution III; S5, purifying the acid leaching solution III through a reverse osmosis membrane and reducing it with zinc flakes to obtain sponge indium; S6, smelting the sponge indium to cast an indium ingot to obtain crude indium, and electrolytically refining the crude indium to obtain refined indium. The treatment process of the present invention achieves one-time recovery of indium, with a direct recovery rate of indium as high as 95% and a purity of 99.995%. At the same time, the direct recovery rate of copper reaches up to 85%, while all lead remains in the slag mud, achieving the separation of indium from other valuable metals, increasing economic benefits, and having good application prospects.

The invention provides a solid waste-based geopolymer and a preparation method and application thereof, the solid waste-based geopolymer comprises the following components: coal gasification slag, slag, alkaline residue, ardealite and sand, and the weight ratio of the coal gasification slag to the slag to the alkaline residue to the ardealite is (30-45): (30-45): (5-20): (5-20); the weight ratio of the sand to the sum of the weight of the coal gasification slag, the slag, the alkaline residues and the ardealite is (3-5): 1. The solid waste-based geopolymer disclosed by the invention has high strength, realizes effective comprehensive utilization of various solid wastes, and solves the problem that solid wastes such as coal gasification slag and phosphogypsum cannot be effectively utilized in the prior art.

The invention discloses a roadbed soil curing material based on large-dosage red mud and a preparation method thereof, and the roadbed soil curing material is prepared from the following components in parts by mass: 80-120 parts of red mud, 4-10 parts of steel slag, 15-20 parts of blast furnace slag, 20-30 parts of iron tailings, 5-15 parts of desulfurized gypsum, 10-15 parts of alkaline residue, 5-10 parts of carbide slag, 4-6 parts of industrial sludge, 1-5 parts of salt dealkalizing agent and 1-5 parts of water stability enhancer. The roadbed soil curing material prepared by adopting the method is simple in preparation method, the compressive strength of the silty clay can be improved, the water stability of the silty clay can be effectively improved, the cured silty clay can meet the strength requirement of the roadbed soil, and efficient curing of the silty clay is realized.

The present invention discloses a kind of highway roadbed solid waste alkali residue solidified soil and its construction method, relates to road engineering technology and solid waste utilization technology field, respectively utilizes the microscopic enhancement mechanism of self-made whiskers, combines interface enhancement to form stable chemical bonds and utilizes nano-silica to meet the particle hole filling and synergistic effect, and the remaining holes after dehydration are filled with hydration products, especially silicon-containing hydrogel provides nucleation sites, accelerates product growth, nano-silica high specific surface area promotes C-S-H nucleation, and the two admixture components work together to further improve the compressive strength of solidified soil. Solve the problem that alkali residue itself has the characteristics of large water content, excessive dosage will lead to increased water content of improved soil, difficult compaction during construction, resulting in increased porosity and decreased mechanical properties.

The application discloses high-performance desert sand foam concrete and a preparation method thereof. The concrete comprises the following components in parts by weight: 70 parts of Portland cement, 30 parts of fly ash, 20-100 parts of desert sand, 25-35 parts of salt water, 0.2-0.5 parts of a foaming agent, 5-12 parts of a composite activator, 5-15 parts of alkali-activated metakaolin composite microbeads and 0.5-2 parts of a roughened PET polymer fiber. The composite activator is composed of calcined phosphogypsum, alkali residue, nano silicon dioxide, silica fume and 5% mass concentration polyvinyl alcohol in a weight ratio of (40-50):(30-40):(10-15):(5-10):(10-15). The alkali-activated metakaolin composite microbeads are composed of fly ash floating beads, metakaolin, water glass, sodium hydroxide and deionized water in a weight ratio of 100:(20-30):(15-25):(3-5):(20-30). The application is particularly suitable for a buffer pressure relief filling layer between primary support and secondary lining in a tunnel engineering, thereby effectively reducing high ground stress and stratum load acting on a tunnel lining structure.

The present invention discloses a green backfilling method based on all-solid waste engineering soil, and relates to the technical field of backfilling deep, narrow and long irregular spaces such as various trenches and fertilizer troughs in housing construction projects, road and bridge projects. It is composed of saturated surface dry-pressed alkali slag, carbide slag, phosphogypsum and slag in a specific particle size range, replacing traditional natural soil as the backfill matrix, and using alkaline materials such as alkali slag to stimulate the activity of slag materials. Under the action of appropriate amount of water, the material is prompted to undergo hydration and gelation reaction, further improving the performance of the material. While saving the cost of later maintenance and repair, it reduces environmental pollution and promotes the resource utilization of solid waste materials.

The invention relates to a curing agent for high-flow-state solidified soil applied to underwater structure scour pit protection, the high-flow-state solidified soil and application of the high-flow-state solidified soil, and relates to the field of hydraulic engineering materials. The curing agent comprises a powder curing agent and a liquid curing agent, and the mass ratio of the powder curing agent to the liquid curing agent is (5-15): (0.1-0.6); the powder curing agent comprises sulphoaluminate cement, superfine slag powder, fly ash, gypsum powder, plant ash, silica powder, alkaline residues, hydroxypropyl methyl cellulose, polyvinyl alcohol, an exciting agent and a water reducing agent; the liquid curing agent comprises deionized water, sodium methyl silicate, potassium methyl silicate and polydimethylsiloxane. The raw materials of the high-flow-state solidified soil comprise slurry, fine sand and a curing agent. The application refers to the application in underwater structure scour pit protection. The construction method has the advantages in the aspects of underwater construction, scouring resistance, compact filling, bearing and the like, and the constructability, adaptability, durability and safety of the solidified soil in the aspect of underwater structure protection are improved.

The invention discloses a seawater-mixed high-pressure salt corrosion-resistant all-solid-waste anti-seepage grouting material and a preparation method thereof. The high-pressure salt corrosion-resistant all-solid-waste anti-seepage grouting material can adapt to a high-salt and high-pressure environment. In addition, the adopted raw materials are almost zero in cost, solid raw materials are all taken from solid wastes, and solid waste recycling is achieved; strong alkaline leachate of an alkaline residue field is used as an alkali activator, and waste is treated by waste; finally, seawater is adopted for mixing according to local conditions, so that fresh water resources are greatly saved, and the anti-seepage performance can be improved.

The invention relates to the technical field of building material admixtures, and particularly discloses nano calcium carbonate, an alkaline residue-based solid waste cementing material early strength agent, a preparation method and application. The preparation method of the nano calcium carbonate comprises the following steps: carrying out reaction on alkaline residues and a chlorine-containing solution, and carrying out solid-liquid separation to obtain filtrate; and adding an alcohol solvent into the filtrate, introducing carbon dioxide and nitrogen to carry out carbonization reaction, and crystallizing to obtain the nano calcium carbonate. The growth process of the nano calcium carbonate crystals is controlled by controlling the carbonization reaction conditions and the flow of nitrogen and carbon dioxide, the method has the advantage of being easy to operate, and the prepared nano calcium carbonate is applied to the alkaline residue-based solid waste cementing material early strength agent; the strength, the initial setting time and the final setting time of the solid waste cementing material at each age can be improved, and a new idea is provided for preparation of the alkaline residue-based solid waste cementing material early strength agent.

The application provides a homologous heterogeneous alkali residue-based fluid-state solidified soil and a preparation method and application thereof, and belongs to the technical field of solid waste resource utilization. The alkali residue-based solidified agent is prepared by using the pressure-filtered alkali residue, slag, desulfurization ash, fly ash and cement. The high-water-content paste-shaped original alkali residue, desalted solid salt alkali residue and slag are used as the alkali residue-based matrix soil. The homologous heterogeneous alkali residue has different structures and forms, which can be used as the matrix soil and can be used to prepare the solidified agent, promotes and improves the physicochemical reaction and particle size matching among different components, and thus improves the mechanical properties of the homologous heterogeneous alkali residue-based fluid-state solidified soil. The flowability of the homologous heterogeneous alkali residue-based fluid-state solidified soil can be adjusted by adding a proper amount of water and water reducing agent, the construction demand can be met, and the homologous heterogeneous alkali residue-based fluid-state solidified soil has excellent compacting performance.

This invention discloses a high-pressure salt-erosion resistant solid waste seepage-proof grouting material mixed with seawater and its preparation method. This high-pressure salt-erosion resistant solid waste seepage-proof grouting material can adapt to high-salt and high-pressure environments. Furthermore, the raw materials used are almost "zero-cost": the solid raw materials are all taken from solid waste, realizing the resource utilization of solid waste; the strongly alkaline leachate from the alkali slag field is used as an alkali activator, treating waste with waste; finally, seawater is used for mixing according to local conditions, which not only saves a large amount of freshwater resources but also improves seepage-proof performance.

The invention discloses a preparation method of a CO2 adsorbent based on coal-based waste residues, which comprises the following steps: carrying out flotation on gasified ash residues to obtain refined carbon; mixing, crushing and screening the refined carbon and the calcium carbide alkaline residues to obtain a mixture; and uniformly mixing the mixture with residual oil to prepare a columnar profile material with the size of phi 2.5 mm * 10mm, and roasting at high temperature to obtain the CO2 adsorbent. Carrying out constant-temperature adsorption on the prepared gasified ash-residual oil-calcium carbide alkaline residue adsorbent, wherein the constant-temperature adsorption temperature is 700 DEG C; according to the method, a feasible method is provided for comprehensive utilization of gasification ash, catalytic cracking residual oil and calcium carbide alkali residues, economic benefits of coal gasification enterprises are increased, waste is turned into wealth, the obtained adsorbent reacts with CO2 through CaO, MgO and other active ingredients to adsorb and solidify CO2 on one hand, CO2 is adsorbed through activated carbon subjected to activation treatment on the other hand, and the CO2 is recycled. The absorption and solidification of CO2 are realized through the combined action.