789 results about "Clinker (waste)" patented technology

The invention discloses a method for preparing a solid waste cementing material from micro-carbonized steel slag, and belongs to the technical field of building materials. The preparation method comprises the following steps: carrying out crushing, iron separation and grinding treatment on steel slag particles to obtain steel slag powder; mixing the steel slag powder with water and a carbonization aid to obtain a steel slag wet mixture; feeding the wet steel slag mixture into a carbon dioxide curing kettle for curing and intensely stirring, quickly carbonizing to obtain micro-carbonized steel slag particles, and grinding and drying to obtain micro-carbonized steel slag powder; 45-70 parts of micro-carbonized steel slag, 15-35 parts of slag, 1-8 parts of gypsum, 1-8 parts of cement or clinker, 1-15 parts of fly ash or metal tailings, 1-10 parts of an alkaline solution and 25-30 parts of water are mixed to obtain the micro-carbonized steel slag solid waste cementing material. The micro-carbonized solid waste steel slag cementing material prepared by the invention has the advantages of low cost, simple preparation process and equipment, better early and later mechanical properties, good stability, low carbon, high additional value and the like.

The invention relates to a high-strength stable solid waste-based composite cementing material and a preparation method and application thereof in the field of building materials. The high-strength stable solid waste-based composite cementing material is prepared from the following raw materials in parts by weight: 70-85 parts of composite solid waste micro powder; 10 to 20 parts of Portland cement clinker; 3-8 parts of a composite activator; 0.5 to 2 parts of a nano-scale function regulator; wherein the composite solid waste micro powder is prepared by mixing and grinding the following raw materials in parts by weight: 40-60 parts of blast furnace slag powder; 20 to 30 parts of fly ash; 10-20 parts of chemically modified electrolytic manganese residue powder; and 5-15 parts of steel slag powder. According to the preparation method, sodium metasilicate is adopted to assist medium-temperature calcination to chemically modify the electrolytic manganese residues, so that not only is the gelation activity of the electrolytic manganese residues effectively excited, but also free-state manganese, cadmium and other heavy metal ions in the electrolytic manganese residues are fixed in situ in newly formed zeolite-like silicate mineral lattices through thermochemical reconstruction; and a brand new technical path is opened up for safe and high-value utilization of the typical hazardous waste, namely the electrolytic manganese residues.

The invention relates to the technical field of concrete preparation, in particular to fiber-reinforced building solid waste recycled aggregate concrete and a preparation method thereof.The preparation method comprises the following preparation steps that S1, recycled coarse aggregate, slag, fly ash and river sand are mixed and stirred according to the proportion, and a cement mixture is obtained; s2, calcining the cement mixture for 2-3 hours to obtain cement clinker; s3, cement clinker, modified fibers, modified graphene oxide and tetrasodium iminodisuccinate are mixed according to the proportion and then poured into a stirrer to be stirred for 5-6 min; and S4, adding water into the stirrer according to the proportion, continuously stirring for 6-10 minutes, and taking out to obtain the fiber-reinforced building solid waste recycled aggregate concrete. According to the invention, the polystyrene fiber and the concrete are connected more tightly by using the modified fiber, and the polystyrene fiber can be subjected to multiple reactions with components in the concrete in an alkaline environment of the concrete to form a stable network structure, so that mechanical indexes such as crack resistance and breaking strength of the concrete are improved.

The invention discloses a low-carbon cement calcining process using carbide slag to replace limestone clinker, and relates to the technical field of low-carbon calcined cement processing. A treatment table, a step-by-step crushing mechanism, a screening reflux mechanism, a self-turning drying mechanism and a linkage driving mechanism are matched to complete low-carbon cement calcination by using the carbide slag to replace limestone clinker, and the step-by-step crushing mechanism for performing multi-stage crushing on the waste carbide slag to gradually reduce the particle size is mounted on the upper end surface of the treatment table; according to the calcium carbide slag crushing and drying device, seamless connection of crushing and drying of calcium carbide slag is achieved through combination of the step-by-step crushing mechanism and the self-overturning drying mechanism, the processing speed is increased, dust is reduced, and the crushing and drying efficiency is improved. By means of the combination of the first-stage crushing assembly and the second-stage crushing assembly and staggered rubbing of the trapezoidal crushing plate and the crushed plate, complex stress is applied, the stress direction is increased, hard particles are effectively treated, and the uniformity of carbide slag is ensured.

The invention discloses a high-content steel slag-based functionalized nano-composite cementing material and a preparation method thereof, and belongs to the technical field of solid waste resource comprehensive utilization. The nano composite cementing material is prepared from the following raw materials in parts by mass: 50 to 65 parts of steel slag, 10 to 20 parts of fly ash, 10 to 25 parts of carbide slag, 8 to 15 parts of desulfurized gypsum, 0.3 to 1.0 part of nano silicon dioxide and 0.003 to 0.03 part of silane coupling agent. On the basis of a solid waste synergism theory and an internal alkali excitation effect, quaternary solid wastes such as steel slag and fly ash are optimized and compounded by adopting methods of mechanical-thermal activation, addition of modified nano silicon dioxide, synergistic gelling between solid wastes and the like; the paint is prepared through gradient grinding and a medium-temperature wet curing process. The preparation method is simple, high-temperature calcination is not needed, cement clinker and exogenous excitant do not need to be added, the obtained cementing material can replace part of cement to be applied to the fields of road bases, mine filling, low-carbon building material products and the like, resource utilization and high-value utilization of regional bulk industrial solid waste can be achieved, and carbon emission and production cost are effectively reduced.

The invention discloses a method for selectively extracting rubidium from lithium ore tailings in a short process, and relates to the field of comprehensive utilization of mineral waste. The method comprises the following steps: grinding the lithium ore tailings into powder; adding an additive into the lithium ore tailing powder, and fully stirring and mixing; roasting the mixture to obtain a calcined clinker; directly carrying out water leaching on the calcined clinker; rubidium enrichment liquid and leaching residues are obtained from the leaching liquid through solid-liquid separation; the rubidium extraction composite material is mixed with rubidium enrichment liquid, and selective adsorption of rubidium is achieved; and recycling the composite material, and the like. According to the method, efficient selective recovery of rubidium in the lithium ore tailings is achieved, the water leaching time is shortened, the water leaching temperature and the rubidium extraction roasting reaction temperature are reduced, the separation efficiency of impurities in the lithium ore tailings and the selective recovery efficiency of the rubidium element are remarkably improved, and efficient selective recovery of rubidium in the lithium ore tailings is achieved.

According to the modified fiber mining filling material and the preparation method thereof provided by the invention, through a dual modification technology of plasma treatment and a silane coupling agent, the uniform dispersity of fibers in a cementing agent is enhanced, and the properties such as rapid hardening, early strength and compressive strength retention rate of the filling material are remarkably improved. The filling material comprises cement clinker, solid waste, a retarder, an early strength agent, modified fibers, an accelerator, gypsum, a water reducing agent, a suspending agent and other raw materials, the modified fibers are treated through specific steps, surface functional groups are increased, and the compatibility and binding power of the modified fibers and a cementing agent are improved. The filling material disclosed by the invention has the advantages of good transportability, simplicity and convenience in construction, low cost and environmental protection characteristic, conforms to the development trend of green mining industry, is particularly suitable for being applied to mine filling and supporting, and has wide application prospects and social and economic values.

The invention provides a CO2 mineralized cementing material based on steel slag-mineral slag-fly ash multi-element solid waste and a preparation method, and relates to the technical field of building materials. The CO2 mineralized cementing material based on the steel slag-slag-fly ash multi-element solid waste is prepared from the following raw materials in parts by mass: 10 to 15 parts of steel slag, 30 to 40 parts of slag, 50 to 60 parts of slag fly ash, 5 to 20 parts of gypsum, 1 to 5 parts of clinker, 1 to 5 parts of cement, 5 to 20 parts of exciting agent, 4 to 6 parts of cross-linking agent composition, 0.1 to 0.5 part of alkaline water and 0.1 to 0.5 part of defoaming agent. According to the invention, the steel slag, the furnace slag and the furnace slag fly ash are excited by adopting a composite exciting agent of aluminum sulfate, calcium aluminate and sodium hydroxide, the problem of early strength is successfully solved through alkali excitation and aluminate excitation, the proportion of the exciting agent is reasonably configured, the effect of the exciting agent is exerted to the maximum extent, and the mechanical strength of the CO2 mineralized cementing material is improved.

The invention relates to the technical field of expansive soil treatment, and particularly discloses an expansive soil rapid hardening material as well as a preparation method and application thereof. The invention discloses an expansive type rapid hardening material for soil. The expansive type rapid hardening material is prepared from the following components: high belite sulphoaluminate cement clinker, ordinary Portland cement, gypsum, solid waste high-activity superfine powder, a nano crystal nucleus induction activating agent, a nano modified complexing agent and a modified early strength agent, the nano crystal nucleus induction activating agent is prepared from nano Al2O3, sodium dodecyl benzene sulfonate, NaOH and Na2SiO3; the nano modified complexing agent is prepared from nano SiO2, lauryl sodium sulfate and silane; the modified early strength agent is prepared from modified graphene oxide, Na2SiO3 and water. According to the technical scheme, the solid waste can be recycled, the expansive soil treated by the hardening material can achieve the effects of high hour strength and good water stability, and the curing speed and the production efficiency are greatly improved.

The invention discloses a high belite iron aluminate cement clinker, which is prepared from the following raw materials in parts by weight: 39 to 73 parts of carbide slag, 8 to 37 parts of low-grade bauxite, 10 to 16 parts of ardealite, 1 to 31 parts of fly ash and 3 to 9 parts of steel slag. According to the cement clinker, the resource utilization rate of industrial solid waste in cement preparation can be remarkably increased, and dependence on natural raw materials and high-grade raw materials is reduced; impurities in various solid wastes can be used as in-situ mineralizing agents and activating agents, and on the basis of realizing high-added-value resource utilization of various industrial solid wastes and low-grade bauxite, efficient synthesis of target minerals at a relatively low temperature is promoted; and gradient temperature control calcination and gradient cooling processes are further combined, so that sufficient crystallization and development of a target mineral phase can be effectively promoted, a clinker microstructure is optimized, excellent early strength and continuously increased later strength of the cement are ensured, and the common problems of strength shrinkage and the like of the traditional solid waste-based cement can be effectively avoided.

The invention provides equipment for extracting lithium from leaching residues and a two-stage roasting water leaching lithium extraction process. The solid waste extraction device comprises a base, an extraction tank, a top plate, an auxiliary pipe and a discharging mechanism. The bottom of the extraction tank is mounted at the top of the base through bolts, the top plate is mounted at the top of the extraction tank through bolts, and the auxiliary pipe is fixedly connected into the top plate; according to the scheme, secondary utilization is carried out on primary leaching residues generated in the traditional lithium leaching and extracting process, secondary leaching is carried out on lithium elements in the primary leaching residues to extract the lithium elements, and therefore secondary utilization is achieved, it can be guaranteed that solid waste is fully utilized, and green and environment-friendly development is facilitated; and secondly, in the blanking process of the primary leaching residue roasting clinker, the rotating pipe in charge of blanking adopts self-rotation design, so that the primary leaching residue roasting clinker can be prevented from being adhered to the inner wall of the pipe through self rotation of the rotating pipe while the blanking can be quickly realized, and the blanking is ensured to be smoother.

The invention relates to a method for improving early-stage performance of an all-solid-waste cementing material, and aims to improve the early-stage performance of the cementing material. At present, the early strength (1d strength) of an all-solid waste cementing material is generally low, but the characteristic is closely related to construction efficiency and is a key limit for large-scale application of the all-solid waste cementing material. Sintering is not included in the working procedures, and the product does not contain cement clinker. The method comprises the following steps: selecting industrial solid wastes such as steel slag, blast furnace water slag, iron alloy slag, silicomanganese slag, industrial byproduct gypsum, sintering fly ash, fly ash, calcined coal gangue and the like as raw materials; the industrial solid waste is subjected to independent or mixed grinding treatment; by optimizing the raw material ratio and introducing key component minerals, the specific surface area of the cementing material is increased, and active sites of the key minerals are dissociated and exposed. The mass of the introduced key components for optimizing the raw material ratio accounts for less than or equal to 15% of the total mass of the cementing material, the mass fraction of the key and active minerals is increased by less than or equal to 10%, and the early strength of the all-solid waste cementing material is increased by 30%.

The invention discloses an iron tailing-based all-solid-waste clinker-free cementing material and a preparation method thereof, and belongs to the technical field of building materials. The cementing material comprises the following components in parts by weight: 30-50 parts of activated iron tailings, 10-20 parts of steel slag, 20-40 parts of mineral slag, 5-20 parts of phosphogypsum and 5-20 parts of an activating agent; a preparation method of the activated iron tailings comprises the following steps that the iron tailings and the red mud are mixed, then an alkaline solution is added, alkali-heat combined treatment is conducted for 2-6 h at the temperature of 150-230 DEG C after even mixing, and the activated iron tailings are obtained after drying. According to the method, the activity of the iron tailings and the red mud is improved through component complementation in the iron tailing activity excitation process, the dosage of NaOH in the alkali-heat excitation process is reduced, and the cementing material with high hydration activity is prepared through multi-source solid waste synergistic interaction in the clinker-free cementing material preparation process.

The invention belongs to the technical field of masonry cement, and particularly discloses all-solid-waste low-carbon-emission masonry cement and a preparation method thereof. Comprising the following steps: 1, finely grinding iron tailings, carbide slag, fly ash and silica fume, and proportioning according to a design to obtain a cement raw material; 2, agglomerating or pelletizing the cement raw material, and calcining according to a designed temperature to obtain a cement clinker; and 3, mixing the cement clinker with a certain proportion of gypsum, and grinding to the target fineness to obtain the masonry cement. The masonry cement is prepared from all solid wastes, meanwhile, a calcium source is mainly provided by the carbide slag with low carbon emission, compared with cement fired by calcium carbonate calcium sources, the carbon emission is greatly reduced, the goal of high-valued and green utilization of various solid wastes including iron tailings is achieved, and the method is suitable for industrial production. The compressive strength, the sulfur trioxide content and the screen residue of the prepared masonry cement meet the national standard requirements of masonry cement. In addition, the masonry cement is prepared from all solid waste raw materials, so that the preparation cost of the masonry cement is reduced.

The invention relates to the technical field of metal smelting and impurity removal, in particular to a method for solidifying heavy metal beryllium and thallium in the lithium extraction process of lepidolite ore. In the process of mixing and leaching the clinker of the lepidolite ore obtained by roasting with the sulfate method and water, the slurry is treated by adding the curing agent, and beryllium and thallium metal elements are adsorbed and retained in the leaching residues in the form of precipitates; therefore, the problem of environmental pollution caused by secondary leaching of beryllium and thallium elements in the leaching residues due to factors such as rainwater in the subsequent landfill treatment process is solved, the beryllium and thallium elements in the lithium residues are solidified in the lithium extraction process to become common solid waste, and extra resource consumption caused by secondary processing solidification after the lithium residues are output is reduced. The cost is reduced and the efficiency is improved for enterprises. Meanwhile, the curing agent used in the method is simple in component and small in dosage, and the resource cost can be saved under the condition that the beryllium and thallium curing effect is guaranteed.

The invention discloses a method for preparing low-carbon cement based on construction wastes, which comprises the following steps: carrying out deep hydrothermal reaction on the construction wastes by using an autoclave under high-temperature and high-pressure conditions, so that silicon-aluminum minerals in the construction wastes are subjected to more thorough hydrothermal rearrangement to generate more stable hydrated silicate and aluminosilicate; the reaction activity of the clinker can be improved at the subsequent lower calcining temperature, so that the utilization rate and the high activity of complex components such as the building wastes in the cement preparation process are realized. The low-carbon cement disclosed by the invention is relatively high in later compressive strength and breaking strength, the strength grade of the low-carbon cement is 32.5, and the low-carbon cement meets building requirements and can be widely applied to the fields of buildings, roads and the like. According to the invention, closed cycle of solid waste-material is realized through waste recycling, and double innovation of material performance and ecological benefit is achieved.

The invention relates to the technical field of concrete preparation, and discloses machine-made sand concrete and a preparation process thereof.The machine-made sand concrete comprises broken stone, machine-made sand, cement and water according to a conventional ratio, the cement is slag cement, and the slag cement comprises, by weight, 20-25 parts of steel slag, 18-32 parts of blast furnace slag, 2-4 parts of water, 1-3 parts of a water reducing agent, 1-3 parts of a water reducing agent and 1-3 parts of a water reducing agent. And 6-12 parts of Portland cement clinker. The prepared machine-made sand concrete is good in anti-permeability and anti-carbonization capacity, the chemical corrosion resistance and bonding strength of the machine-made sand concrete are improved through the added barium sulfide industrial waste residues, and the machine-made sand concrete has the long service life. The invention solves the industrial technical problems in preparation of green high-performance concrete from machine-made sand and industrial waste residues, and breaks through the common key technical problems of high-efficiency production regulation and control of machine-made sand and the like.

The invention discloses a method for preparing a mine filling cementitious material by using cyanide tailings, comprising the following steps: weighing dried cyanide tailings, secondary aluminum ash, barium slag and phosphogypsum in proportion, and putting them into a tank mixer for mixing; after uniform mixing, adding sodium hydroxide solution for wetting, and using a tablet press to press the powder into a cubic green body, and placing the green body in an oven for drying without overlapping; putting the dried green body into a high-temperature box-type muffle furnace for calcining; adding phosphogypsum into the calcined clinker phase, crushing the green body, and sending the green body into a ball mill for ball milling treatment to obtain a cementitious material, and using tailings as aggregates, and supplemented with a polycarboxylic acid water reducer, and adding water to prepare a cementitious material for mine filling; the invention uses cyanide tailings as raw materials, and combines industrial solid wastes such as barium slag, secondary aluminum ash and phosphogypsum, and adopts a one-step activation method to prepare a cementitious material, which can simultaneously complete the decyanation and detoxification of the tailings and the activation of the tailings, has a simple process flow, and the prepared filling material has a fast hydration and hardening rate, good fluidity and high mechanical strength.

The invention provides solid waste-based delayed coagulation micro-expansive cement and a preparation method thereof, and belongs to the technical field of building materials. The solid waste-based delayed coagulation micro-expansive cement is prepared from the following raw materials in percentage by mass: 40%-50% of Portland cement clinker, 0.04%-0.06% of a delayed coagulation type grinding aid, 8%-12% of high-calcium steel slag, 10%-16% of slag, 8%-16% of fly ash, 8%-12% of modified phosphogypsum and 8%-12% of calcium-containing powder, wherein a preparation method of the modified phosphogypsum comprises the following steps: uniformly mixing phosphogypsum with phosphorus tailings subjected to high-temperature calcination, and storing for 10-30 days to obtain a mixture; and mixing the mixture with high-calcium steel slag, grinding, and drying to obtain the modified phosphogypsum. The solid waste-based delayed coagulation micro-expansive cement has the advantages of stable delayed coagulation effect, shrinkage compensation effect, continuous increase of later strength and the like; wherein the initial setting time of the solid waste-based delayed coagulation micro-expansive cement is 350 to 380 minutes, and the final setting time of the solid waste-based delayed coagulation micro-expansive cement is 420 to 460 minutes; 28-day compressive strength is greater than or equal to 45 MPa; the 28-day dry shrinkage rate is less than or equal to 0.09%; and the 28-day linear expansion rate is less than or equal to 0.5%.

The invention discloses a method for preparing cement clinker by taking coal gangue as a raw material, and belongs to the field of solid waste recycling. The preparation method comprises the following steps: crushing coal gangue, transferring the crushed coal gangue into a ball-milling tank, adding perovskite manganese oxide nano powder, and carrying out ball-milling mixing, so as to obtain modified coal gangue powder after the ball-milling mixing is finished; and performing acoustic resonance mixing on the ground and dried limestone, manganese slag, copper slag, silica fume, disodium hydrogen phosphate and modified coal gangue powder, calcining after mixing, and cooling to obtain the cement clinker. The coal gangue is used for replacing part of raw materials, under the condition that the quality of the cement clinker is ensured, coal gangue solid waste can be properly treated, waste resources are recycled, organic matter, ash, lignin and other components in the coal gangue can provide part of heat energy, the use amount of fuel coal can be saved, energy consumption is remarkably reduced, and the cost is reduced. Therefore, the production cost of the clinker is reduced.

The invention discloses a clinker-free low-carbon cementing material and a preparation method thereof, and belongs to the technical field of building materials. The invention aims to solve the problems of high energy consumption and high carbon emission of the traditional cement-based material, increase of the utilization rate of low-grade diatomite and bauxite waste residues and reduction of the cement production cost. The clinker-free low-carbon cementing material is prepared from the following components in parts by mass: 600 parts of an active component, 281-382 parts of an exciting agent component, 6-30 parts of a nano reinforcing agent, 3-20 parts of a calcium supplement and 2-10 parts of an organic solvent. The method comprises the following steps: 1, preparing activated diatomite; 2, preparing an alkali activator; 3, mixing the powder; 4, preparing slurry; and 5, carrying out vibration molding, and curing to obtain the clinker-free low-carbon cementing material. The invention provides an effective technical means for realizing the aim of carbon neutralization. Meanwhile, compared with traditional cement production, the link of high-temperature clinker calcination is avoided, and energy consumption and carbon footprint are reduced fundamentally.

The invention relates to high-performance super sulfate cement-based pervious concrete and a preparation method thereof, and belongs to the technical field of solid waste building materials, the high-performance super sulfate cement-based pervious concrete comprises the following raw materials by weight: 75-105 parts of high temperature activated powder, 180-240 parts of slag, 15-30 parts of cement, 800-1100 parts of coarse aggregate, 100-120 parts of water, and 6-12 parts of a water reducer; the high-temperature activated powder comprises the following raw materials in parts by weight: 45-60 parts of sludge ash and 30-45 parts of gypsum. According to the high-performance super-sulfate cement-based pervious concrete and the preparation method, solid wastes such as slag and sludge are effectively treated, so that solid waste resources are recycled, land resource shortage caused by solid waste accumulation is reduced, the use of cement clinker is greatly reduced, and the performance of the high-performance super-sulfate cement-based pervious concrete is also provided.

The invention discloses a method for preparing a low-clinker composite mortar material from granite weathered construction engineering residue soil and mortar. The method comprises the following steps: settling and screening engineering residue soil, and respectively carrying out biomimetic mineralization modification, particle size allocation and proportioning on powdery clayey soil and coarse particles to form mixed mortar; according to the mixed mortar, granite weathering type constructional engineering muck solid waste can be fully utilized, the recycling rate reaches 96%, the performance of the mortar is improved by introducing a biomimetic mineralization modification technology, conditions are mild, no harmful by-products exist, and the mechanical performance of the composite mortar is excellent. Through a biomimetic mineralization modification technology, after the prepared mortar is cured for 28 days, the highest compressive strength can reach 65.45 MPa, and the compressive strength is superior to that of traditional OPC mortar, fly ash composite mortar and untreated muck mortar.

The invention relates to the technical field of solid waste treatment, and discloses a lithium slag treatment method which comprises the following steps: (1) mixing lithium slag and an alkaline reactant, and grinding to obtain a mixed raw material; (2) sintering the mixed raw material to obtain sintered clinker; and (3) dipping the sintered clinker in an alkaline solution, and carrying out solid-liquid separation. According to the method, toxic elements in the lithium slag can be effectively removed, environmental risks caused by long-term stockpiling of the lithium slag are avoided, potassium and sodium elements in the lithium slag can be effectively removed, adverse effects of the lithium slag on soil and building materials in building and soil application are avoided, and the utilization rate of the lithium slag is increased.

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 belongs to the technical field of negative carbon building materials, and particularly relates to a multi-element solid waste negative carbon cement-based material and a preparation method thereof. The material is prepared from the following components in parts by weight: 10 to 320 parts of carbonized carbide slag, 0 to 240 parts of uncarbonized carbide slag, 25 to 640 parts of calcined coal gangue, 25 to 800 parts of Portland cement, 6 to 320 parts of silica fume and other pozzolanic mineral admixtures and 30 to 800 parts of mixing water. The preparation method comprises the following steps: carbonizing the carbide slag until the content of calcium carbonate is more than or equal to 90%, and calcining and activating the coal gangue at 700-800 DEG C; all the powder raw materials are subjected to dry mixing, water is added for segmented stirring, and standard curing is performed after pouring forming. The carbonized carbide slag is used for replacing limestone to achieve carbon sequestration, the calcined coal gangue is used for replacing calcined clay, natural resources are prevented from being exploited, the cement clinker replacement rate of 70% is achieved through the synergistic effect of multi-element solid waste in a low clinker system, the material has excellent mechanical and durability, and carbon emission and resource consumption are remarkably reduced.

The invention discloses a solid-waste-based low-calcium clinker prepared from industrial solid wastes at low temperature and a method, which comprises the following steps: grinding a calcium raw material, a siliceous raw material, an aluminum correction raw material, an iron correction raw material and gypsum as raw materials, and fully mixing in proportion to obtain a homogeneous mixed raw material; calcining the mixed raw material at low temperature, quickly cooling after calcining, and grinding to obtain solid waste-based low-calcium clinker; the mineral phase of the cement clinker comprises 45-50% of calcium sulphosilicate (C5S2), 25-35% of calcium sulphoaluminate (C4A3), 10-15% of an iron phase (C6AF2) and the balance of unreacted raw materials and calcium aluminate in different forms. The CaO content required by the clinker prepared by the method disclosed by the invention is 45-48% and is about 17-20% lower than the CaO content (more than 65%) in ordinary Portland cement clinker. Finally, the carbon emission generated by limestone decomposition is significantly reduced. The low-calcium cement clinker prepared by the invention has the advantages of good burnability, low firing temperature, good grindability and excellent early compressive strength.

The invention discloses a low-carbon masonry cementing material as well as a preparation method and application thereof. The low-carbon masonry cementing material is prepared from the following raw materials in parts by weight: 95-100 parts of ceramsite waste residue powder, 1-10 parts of magnesium aluminum silicate slag and 0-4 parts of clinker, the low-carbon masonry cementing material contains a large amount of amorphous active silicon, and under the direct excitation hydration action of the magnesium aluminum silicate slag component, the hydration rate of the low-carbon masonry cementing material is promoted, so that the low-carbon masonry cementing material has the characteristics of improved early and long-term strength, strong durability, high water retention rate and small hydration heat; besides, by adding the clinker, mineral components such as CaO, SiO2 and Al2O3 can be released and promoted to be subjected to a hydration reaction, C-S-H series hydrates and ettringite are generated, and the artificial stone is coagulated and hardened into the hard artificial stone at the normal temperature like cement.

The application discloses a method for preparing low-carbon clinker by electrolytic manganese residue and phosphogypsum, and the method comprises the following steps: obtaining phosphogypsum, electrolytic manganese residue and carbonaceous raw materials, drying and crushing, and then mixing and grinding according to the modified C:S, KH value and total CaO:SiO2 mass ratio; the obtained mixture is added with water to form material balls, and then the material balls are dried; the dried material balls are calcined in an oxygen-deficient or oxygen-free environment, and then the low-carbon clinker is obtained after cooling; and the reduction components in the electrolytic manganese residue are used for decomposing the phosphogypsum, so that the industrial solid wastes, i.e., the electrolytic manganese residue and the phosphogypsum, are effectively and cooperatively utilized, and energy is saved; except for the carbonaceous raw materials, the total utilization rate of the electrolytic manganese residue and the phosphogypsum in the batching reaches 100%, the industrial solid wastes, i.e., the electrolytic manganese residue and the phosphogypsum, are effectively and cooperatively utilized, the amount of the carbonaceous raw materials required for decomposing the phosphogypsum is reduced, the cost and carbon emission are reduced, and the low-carbon clinker is synchronously prepared.

The invention discloses a preparation method of lightweight micro-expansion ceramsite. The lightweight micro-expansion ceramsite is prepared from the following raw materials: 30-90 parts of lightweight clay clinker powder, 5-50 parts of quartz tailing powder, 1-10 parts of an expanding agent, 5-15 parts of a binding agent and 0-10 parts of a reinforcing agent. The preparation method comprises the following steps: uniformly mixing the light clay clinker powder, the quartz tailing powder, the expanding agent, the binding agent and the reinforcing agent in a double-shaft stirrer, and then adding the mixture into a pelletizing disc for pelletizing or adding the mixture into an extruder for extruding and pelletizing. The mass of the used water is 15-30% of the mass of the whole solid material. And putting the ceramsite blank granulated in the step into a curing kiln for curing or naturally curing for more than or equal to 8 hours. And carrying out heat treatment on the ceramsite cured in the previous step at the treatment temperature of normal temperature to 700 DEG C to ensure that the water content is less than 1.5%, thereby obtaining the light micro-expansion ceramsite. The lightweight micro-expansion ceramsite prepared by the invention has excellent micro-expansion characteristic at high temperature, has the characteristics of heat insulation, heat preservation, low preparation cost by utilizing industrial solid waste and the like, and is a preferred raw material for preparing lightweight heat-insulation castable or lightweight heat-insulation bricks.