967 results about "Calcium carbide" patented technology

The invention discloses a coal gasification slag-based backfill material for replacing flow-state solidified soil, a preparation method and an application, utilizes a synergistic gelling effect among three raw materials, breaks through a material strength forming mechanism of traditional flow-state solidified soil, solves the problems of multiple components and high cost of a flow-state solidified soil material in the prior art, and has the advantages of low raw material cost, low raw material cost, low raw material cost, low raw material cost and the like. And the product popularization is facilitated. The specific scheme is as follows: the coal gasification slag-based backfill material for replacing the fluidized stabilized soil comprises coal gasification slag, carbide slag and titanium gypsum, the ratio of the coal gasification slag to the carbide slag to the titanium gypsum is 6-8: 1.5-3.5: 0.5-1.5, and an alkaline activator is also added; the coal gasification slag is a slag block with a set particle size formed after slag at the bottom of a gasification furnace is cooled, the carbide slag is waste slag which takes calcium oxide as a main component after acetylene gas is obtained by hydrolyzing calcium carbide, and under the action of an exciting agent, the coal gasification slag and the carbide slag are fully activated to release polyhedrons; part of the polyhedrons form a gelling product so as to improve the early strength of the coal gasification slag-based backfill material.

The invention provides a gel material, an industrial solid waste solidified immature soil material containing the gel material and a preparation method of the industrial solid waste solidified immature soil material, and belongs to the technical field of building materials.The industrial solid wastes such as desulfurized gypsum, carbide slag, slag powder and red mud are used for forming a full-solid-waste gel system, and the full-solid-waste gel system is mixed with immature soil, a water reducing agent and water; the high-flow-state and high-performance industrial solid waste solidified raw soil material suitable for pouring construction can be prepared on the premise of not additionally introducing an additive through a two-step method of ageing coating and stirring. The industrial solid waste solidified immature soil material has the advantages of being good in workability, high in mechanical property, good in durability, environmentally friendly, low in cost and simple in preparation process, use of the industrial solid waste solidified immature soil material in areas with relatively short resources and relatively backward economy is promoted, and the industrial solid waste solidified immature soil material can be used for treating engineering slurry and is applied to filling projects such as pipe galleries, temporary ground hardening and roads.

The invention provides a method for improving the manganese recovery rate of a silicon-manganese alloy, which comprises the following steps: sequentially filling smelting raw materials into a closed electric furnace for smelting to obtain an alloy melt; transferring the alloy melt into a steel ladle, and blowing magnesium powder for desulfurization; the desulfurized alloy melt is subjected to slagging-off, and manganese-silicon alloy molten iron is obtained; the manganese-silicon alloy molten iron is poured into a mold for ingot casting, and a manganese-silicon alloy finished product is obtained after cooling; the smelting raw materials are sequentially filled with a backing material, a mixture and a surface material from bottom to top in the closed electric furnace; the surface material comprises aluminum powder and calcium carbide which are mixed according to a certain proportion, in the method, the surface material comprises the aluminum powder and the calcium carbide which are mixed according to a certain proportion, the effect of a reducing agent can be achieved while the ignition effect is achieved, manganese can be directly reduced in the reaction through addition of the aluminum powder, and therefore the effect of improving the manganese recovery rate is achieved.

The invention relates to the technical field of flue gas purification, in particular to a flue gas purification system with carbide slag as a desulfurizer, which comprises a desulfurization cylinder, a gas inflow self-adjusting assembly is arranged in the middle of the inner side of the desulfurization cylinder, a spraying assembly is fixedly connected above the gas inflow self-adjusting assembly, a separation assembly is fixedly connected to the bottom of the inner side of the desulfurization cylinder, and the separation assembly is fixedly connected to the bottom of the inner side of the desulfurization cylinder. A cleaning assembly is arranged on the outer side of the separation assembly, the top of the desulfurization cylinder is communicated with an exhaust pipe, the cylinder wall of the desulfurization cylinder is communicated with four communicating pipes, one ends of the four communicating pipes are communicated through an annular pipe, and a mounting frame is integrally formed between the inner walls of the desulfurization cylinder. According to the improved flue gas purification system, the speed of the flue gas entering the desulfurization cylinder is adjusted in a self-adaptive mode through the gas inflow self-adjusting assembly, meanwhile, the gas inflow self-adjusting assembly can synchronously adjust the spraying amount, and under mutual cooperation, insufficient reaction caused by the too high flue gas entering speed can be avoided.

The invention relates to the technical field of agriculture, provides a red soil hardening reduction conditioner based on modified straw adsorption carbon as well as a preparation method and application thereof, and solves the problems that an existing red soil hardening conditioner is poor in soil improvement effect and does not have a slow release function. Comprising the following steps: (1) preparing oyster shell-biochar composite powder; (2) loading functional components; (3) directional immobilization of microorganisms; (4) coating a slow-release layer; (5) activating treatment; the red soil hardening reduction conditioner is prepared from the following raw materials in parts by weight: 80 to 100 parts of oyster shell powder, 100 to 200 parts of modified straw adsorption carbon, 10 to 30 parts of rice hull powder, 30 to 50 parts of nano dihydrate gypsum, 100 to 200 parts of a polyglutamic acid solution, 10 to 50 parts of acid-resistant bacillus, 15 to 30 parts of sodium alginate, 30 to 60 parts of humic acid, 10 to 30 parts of carbide slag and 30 to 60 parts of attapulgite.

The invention relates to a calcium carbide sensible heat utilization technology, in particular to a calcium carbide sensible heat utilization system based on continuous discharging. A calcium carbide sensible heat utilization system based on continuous discharging comprises a calcium carbide furnace, a tundish, a heat taking device and a plate crushing device, calcium carbide is connected with the tundish through a chute, and the tundish is connected with the heat taking device through a flow dividing groove; furnace gas enters the heat removal device after being subjected to heat exchange through the heat exchanger; the heat removing device comprises a heat removing furnace, a flow dividing groove and a heat removing roller way are arranged in the heat removing furnace, and a vertical flow dividing plate is arranged in the middle of the flow dividing groove, so that molten calcium carbide flowing out of the tundish is divided into multiple belt type molten calcium carbide flows; the heat removal roller way is connected with the plate crushing device; and the furnace gas subjected to heat exchange by the heat exchanger enters the upper and lower furnace wall positions at one end of the heat extraction furnace from the heat extraction pipeline, is discharged from the other end of the heat extraction furnace, and enters the recovery pipeline. The system is based on continuous discharging of molten calcium carbide, and the production efficiency can be greatly improved; meanwhile, calcium carbide sensible heat can be utilized in the whole stage, and the heat utilization efficiency is higher.

The invention relates to the technical field of solid waste treatment, in particular to a cementing material as well as a preparation method and application thereof. The invention provides a preparation method of a cementing material, which comprises the following steps: S1, adding water into waste incineration fly ash, electrolytic manganese residue and carbide slag, and carrying out mechanical activation to obtain mixed slurry; s2, after the mixed slurry is subjected to pouring forming, curing is conducted, and a cementing material is obtained; the doping amount of the carbide slag accounts for 5-10 wt% of the total mass of the waste incineration fly ash, the electrolytic manganese slag and the carbide slag solid. According to the method, the waste incineration fly ash, the electrolytic manganese residues and the carbide slag are subjected to mechanical activation and synergistic treatment, self-cementation solidification is achieved in an alkaline environment provided by the carbide slag by utilizing the complementary effect of potential gelation activity of aluminosilicate in the electrolytic manganese residues and calcium-rich substances in the waste incineration fly ash, traditional excitants such as cement and lime do not need to be additionally added, and the cost is reduced. The dependence on additional raw materials is obviously reduced, and an effective solution is provided for recycling of a large amount of solid wastes.

The utility model provides a single-double holding clamp for pulling calcium carbide lumps, comprising: a mounting rack, the top of which is used for connecting a lifting device; the double-holding-clamp assembly comprises two clamping units used for carrying the calcium carbide pot; the two clamping units are hinged to the two opposite sides of the mounting frame respectively, each clamping unit is in axial symmetry relative to the mounting frame, and the parts, located on the same side of the mounting frame, of the two clamping units are connected through a connecting piece; the two single holding clamp arms are used for pulling out calcium carbide in the calcium carbide pot and are in axial symmetry about the mounting frame, and the two ends of each single holding clamp arm are hinged to the corresponding connecting piece and detachably connected with the corresponding connecting piece through the corresponding elastic piece. The single-double holding clamp can clamp a calcium carbide pot and a calcium carbide lump in the calcium carbide pot, so that the double-holding clamp assembly and the single-holding clamp arm are prevented from being replaced back and forth in the calcium carbide pot transferring process or the calcium carbide lump pulling-out process, and the operation time is saved; therefore, the transfer efficiency of the calcium carbide pot and the clamping and pulling-out efficiency of the calcium carbide lump in the calcium carbide pot are improved.

The invention provides a multi-solid-waste cementing material as well as a preparation method and an application method thereof. The multi-solid-waste cementing material comprises a multi-solid-waste cementing material and engineering residue soil, wherein the multi-solid-waste cementing material comprises 25%-35% (by mass) of superfine slag powder, 25%-35% (by mass) of fly ash, 7%-15% (by mass) of coal gangue, 8%-15% (by mass) of carbide slag, 5%-12% (by mass) of superfine steel slag powder and 8%-14% (by mass) of an alkali activator; the mass ratio of the multi-solid waste cementing material to the engineering residue soil is 1: (6-8). The cementing material is prepared from a plurality of industrial solid wastes, and has the characteristics of high backfill strength, good fluidity, difficulty in shrinkage, low carbon and environmental protection.

The invention discloses an all-solid waste cementing material and a preparation method thereof, and belongs to the technical field of building materials. The all-solid waste cementing material comprises the following components in parts by mass: 30-45 parts of steel slag, 20-30 parts of mineral slag, 10-20 parts of red mud, 20-25 parts of carbide slag, 10-20 parts of fly ash, 5-10 parts of an interface regulator and 5-20 parts of gypsum. According to the invention, various industrial solid wastes such as the steel slag, the red mud, the carbide slag, the fly ash, the mineral slag and the gypsum are fully utilized as raw materials, so that cyclic utilization of resources is realized, the solid wastes can generate hydration products, form a firm network structure and provide strength, harmless treatment and resource utilization of the solid wastes are realized, and the cement can be used as a substitute material of cement. The method has good economic and environmental benefits, achieves the purpose of carbon reduction in the field of cementing materials, and meets the current industrial development requirements of energy conservation, environmental protection and circular economy.

The invention belongs to the technical field of cold forging steel manufacturing, and particularly discloses a production method of high-aluminum cold forging steel for medium-strength and high-strength standard parts, which comprises the following steps: controlling the slag alkalinity, the contents of C, S and P in molten steel, the tapping temperature, the thickness of a steel ladle slag layer and the tapping time during converter smelting; a deoxidizing agent, lime, low-carbon ferromanganese, silicon-manganese alloy, aluminum-iron alloy and a carburant are added, argon is blown into molten steel when calcium-iron wires are fed in an argon blowing station, components of a refining slag modifier are controlled to be added during LF refining, calcium carbide and the aluminum-iron alloy are added according to the oxygen content and the aluminum content in the molten steel, a tundish for continuous casting is protected by argon, and the molten steel is continuously cast. The thickness of a powder slag layer and the thickness of a liquid slag layer are controlled, a covering agent is added into the tundish, the purity of molten steel is increased by adjusting the whole process section, and therefore follow-up tundish nozzle nodulation is reduced, and the problem that in the prior art, due to the fact that the purity of molten steel is low, a high-aluminum cold heading steel casting continuous casting tundish nozzle is prone to nodulation is solved.

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 utility model discloses a pocket type dust collector for discharging a calcium carbide furnace, which comprises a dust collection box body, a bag mounting frame is arranged in the dust collection box body, a counterbore is arranged on the bag mounting frame, a dust collection bag is arranged in the counterbore, a framework is arranged in the dust collection bag, and an elastic ring is arranged on the framework; a cover ring is rotatably arranged above the dust removal bag, and the dust removal bag is detachably installed in the counterbore through a plug pin by means of the cover ring. According to the dust collection bag, the dust collection bag is detachably installed in the counterbore through the elastic ring, the cover ring and the plug pin, and the dust collection bag can be replaced by pulling out the plug pin and rotating the cover ring during replacement; and meanwhile, the dust removal bag is fastened in the countersunk head groove through the cover ring and the elastic ring, so that the dust removal bag is not easy to fall off.

The invention discloses a carbide slag fly ash concrete aerated block and a preparation method thereof, and belongs to the technical field of resource utilization of building materials and solid waste. The aerated block comprises the following raw materials: carbide slag, fly ash, gypsum, Portland cement, aluminum powder paste, a nano core-shell structure calcium-aluminum-silicon polymer and a zwitterionic foam-stabilizing polymer, the raw materials have a specific weight part range. Wherein the nano core-shell structure calcium-aluminum-silicon polymer is prepared by dispersing fly ash in water to form slurry, reacting the slurry with sodium silicate and a sodium metaaluminate solution in sequence, then adding calcium nitrate and a zinc sulfate solution for continuous reaction, and carrying out separation, washing, drying and grinding; the zwitterionic foam-stabilizing polymer is prepared by polymerizing a monomer in a solvent, precipitating and separating out, quaternizing, activating carboxyl crosslinking, dialyzing and purifying, and freeze-drying. All the steps relate to process parameters such as dry mixing time, stirring time, curing temperature, pressure and time, and the performance of the aerated block is improved through component optimization and preparation process improvement.

The invention relates to a method for preparing superfine calcium carbonate powder by using a carbide slag ammonium salt circulation method, and belongs to the field of inorganic material preparation. The calcium carbide slag is used as a raw material, calcium in the calcium carbide slag is leached out through an ammonium salt solution, and a refined calcium salt solution is obtained after impurity removal and refining. Then, the nucleation particles are subjected to carbonization reaction with carbonizers of different systems in a stator-rotor reactor, and the particle size, dispersity and morphology of the nucleation particles are effectively controlled by adjusting the rotating speed, the recycle ratio and the temperature in the reaction process to strengthen the gas-liquid mass transfer and micro-mixing process. And after the reaction is finished, filtering, washing and drying to obtain the superfine calcium carbonate powder. The mother liquor can be recycled. By adopting the stator-rotor reactor, the reaction efficiency is greatly improved, the reaction time is shortened, and the prepared calcium carbonate powder has the characteristics of small particle size and good dispersity. The method realizes resource utilization of industrial waste residues and emission reduction of carbon dioxide, has the advantages of low cost, no pollution and environmental protection, and is suitable for industrial production.

The invention discloses a stress response prediction method for a calcium carbide operation robot, and belongs to the technical field of artificial intelligence, and the method comprises the steps: carrying out the simulation of the impact collision process of the calcium carbide operation robot under different working conditions, collision data, obtained through simulation, of the calcium carbide operation robot in the impact collision process under different working conditions are extracted, and a sample data set is constructed; constructing a stress prediction model; training the constructed stress prediction model by using the sample data set; and utilizing the trained stress prediction model to predict the stress of the calcium carbide impact robot under different working conditions. According to the method, the stress prediction of the calcium carbide robot is realized by fusing finite element simulation and a deep learning technology. And the calculation efficiency and robustness of the model are effectively improved. And the prediction precision of the model in a complex industrial scene is obviously improved.

The present invention relates to the technology of utilizing sensible heat of calcium carbide, and particularly relates to a calcium carbide sensible heat utilization system based on the recycling of heat extraction medium. A calcium carbide sensible heat utilization system based on the recycling of heat extraction medium includes a calcium carbide tundish. The calcium carbide tundish is connected to a rotary drum through a calcium carbide flow trough. The rotary drum has openings at both ends, and an intake buffer chamber and an exhaust buffer chamber are respectively arranged at the discharge end and the feed end of the rotary drum. A rotary gear ring is arranged on the outer wall of the rotary drum, and the rotary gear ring cooperates with a rotary motor. Driven by the rotary motor, the rotary drum rotates continuously. A scraping device is arranged inside the rotary drum. This kind of calcium carbide sensible heat utilization system changes the traditional process of using a calcium carbide pot for cooling, directly uses a high-speed heat extraction gas flow to impact the calcium carbide liquid into scattered point-like falling materials for cooling, which is convenient for the high-speed heat extraction gas flow to absorb heat and utilize the sensible heat, and the heat extraction gas medium can be recycled, saving energy and protecting the environment.

The invention relates to the technical field of building materials, in particular to a preparation method of a quaternary solid waste-based cementing material and a curing method of cement shield muck. The quaternary solid waste-based cementing material is prepared from the carbide slag, the blast furnace slag micropowder, the fly ash and the graphene oxide, and then the shield muck is cured by using the quaternary solid waste-based cementing material. Not only can the utilization of the shield muck be realized, but also the mechanical property of the solidified shield muck can be improved.

The invention relates to a synthesis method of a compound, in particular to a synthesis method of a thioacetamide derivative, 2-methylbenzimidazole / oxathiazole and a derivative thereof. According to the invention, calcium carbide, hydrogen sulfide and a reaction substrate are used as main raw materials for reaction; according to the method, calcium carbide is used as a solid alkyne source, acetylene gas is released by depolymerizing the calcium carbide through hydrogen sulfide, and the acetylene gas reacts with a reaction substrate, so that the thioacetamide derivative, the 2-methylbenzimidazole / oxathiazole and the derivative of the 2-methylbenzimidazole / oxathiazole are synthesized. The synthesis method disclosed by the invention is carried out in a closed environment, and can be used for synthesizing the thioacetamide derivative, the 2-methylbenzimidazole / oxathiazole and the derivative thereof under a relatively mild condition without additional pressurization and high-pressure-resistant equipment except for pressure generated by introducing hydrogen sulfide and pressure generated by gas generated in a reaction process; and the explosion risk is effectively reduced.

The invention discloses a method for preparing a calcium carbide pellet raw material by taking semi-coke powder as a raw material, and relates to the technical field of calcium carbide preparation. The method specifically comprises the following steps: uniformly mixing quick lime, a binder and semi-coke powder, adding a certain amount of water, conveying the mixed material into a high-pressure ball press machine for pelletizing, and drying the prepared pellets to obtain the calcium carbide pellet raw material. The composite binder is low in price, impurities of pellets are not increased, the contact area of carbon and calcium oxide is increased, and the generation rate of calcium carbide is increased. The calcium carbide raw material prepared by the method disclosed by the invention is relatively high in low-temperature compressive strength and high-temperature compressive strength, meets the requirements of low-temperature conveying and high-temperature calcining, ensures that pellets are kept in a block shape in a high-temperature state, and achieves the purpose of recycling wastes of semi-coke powder in production.

The invention belongs to the field of industrial waste treatment and comprehensive utilization, and provides a method and a process for preparing a heavy metal polluted acidic wastewater purifying agent by coupling red mud with carbide slag, and the process comprises the following steps: S1, raw material pretreatment: respectively drying original red mud and carbide slag at 105 + / -5 DEG C to constant weight, crushing, and sieving with a 100-mesh sieve; s2, mixing: uniformly premixing the red mud and the carbide slag powder in proportion, mixing the mixture with a binder in proportion, and uniformly stirring; s3, activating: slowly spraying a proper amount of water into the uniformly mixed dry powder, and stirring while adding until the material forms a wet block mass with certain plasticity; s4, granulation: feeding the wet material into a granulator with the granulation particle size of 2-5 mm, and aging the raw material particles at room temperature for 12-24 hours; and S5, drying and activating: drying the aged particles at 105-120 DEG C until the weight is constant, cooling to room temperature, and sieving to obtain the purifying agent product. The method has the effects of being high in heavy metal removal rate, stable, safe and efficient.

The present application relates to a kind of small square billet sulfur titanium-containing welding wire steel and its preparation method, belong to the technical field of steelmaking.The converter smelting process, refining process and continuous casting process, specifically are as follows:in the converter smelting process, tapping is carried out using aluminum block, ferrosilicon, silicon manganese deoxidation alloying, pre-slagging is carried out by adding lime, after tapping is finished, the total mass content of FeO and MnO in slag is controlled≤2.5%;In the refining process, lime, calcium carbide and aluminum particles are added for slagging and diffusion deoxidation, after slagging is finished, the slag basicity is controlled to be 2.5~3.0, the total mass content of FeO and MnO in slag is≤0.5%, the total oxygen content of molten steel is≤10ppm, sulfur wire and titanium wire are accurately fed;In the continuous casting process, the inclusion is controlled to gather in the stopper head and the water gap bowl by stopper shaking method, and the basicity of protective slag is controlled to be 0.85~0.95.The sulfur titanium-containing welding wire steel prepared by the above method.The present application solves the problems of small square billet sulfur titanium-containing welding wire steel surface slag inclusion, intermediate crack and water gap nodule.

The invention discloses a multi-solid-waste subgrade filling material and a preparation method and application thereof.The multi-solid-waste subgrade filling material is prepared by adopting different types of industrial waste superfine slag powder, coal ash, coal gangue, carbide slag and steel slag micropowder as main raw materials, adding sodium hydroxide and sodium silicate in a proper proportion as active agents playing an excitation role, and conducting stirring and mixing technological treatment to obtain the multi-solid-waste subgrade filling material. And the multi-solid-waste roadbed filling material disclosed by the invention is obtained through chemical reaction under the condition of normal temperature. The solid waste-based filling material is applied to a roadbed with relatively small bearing capacity and relatively large settlement deformation by utilizing a roadbed treatment technology, so that the aims of increasing the bearing capacity of the roadbed and reducing the settlement deformation are fulfilled.

The invention discloses a method for synthesizing a platinum-based nitrogen-doped graphdiyne catalyst based on an atomic layer deposition technology and application of the platinum-based nitrogen-doped graphdiyne catalyst. Firstly, hexabromobenzene and calcium carbide are subjected to vacuum ball milling, calcination and purification to obtain a graphdiyne carrier, then the graphdiyne carrier and melamine are mixed and calcined to achieve nitrogen doping of the carrier, and then loading of platinum nanoparticles is accurately controlled through an atomic layer deposition technology. According to the method, the characteristics of an atomic layer deposition technology are utilized, deposition parameters and the number of cycles are controlled, uniform distribution and size control of Pt nano-particles on porous graphdiyne are achieved, and a nitrogen-doped graphdiyne carrier and the platinum nano-particles have a synergistic effect. The platinum-based nitrogen-doped graphdiyne catalyst prepared by the invention has the specific surface area of 734.8 m < 2 > g < 1 > and the average pore size of 8.68 nm, and shows excellent electrocatalytic activity and dynamic performance in reaction.

The invention provides a thermochemical conversion system coupled with high-temperature heat energy storage. A high-temperature heat source is provided for various industrial processes through gradient utilization of a heat storage medium. Comprising the following steps: in a calcium carbide production process, an electric heating fluidized bed is combined with high-temperature heat storage gas of 1500 DEG C or above to supply heat, so that efficient reaction is realized and high-purity carbon monoxide is recycled; in the field of biomass conversion, a cracking zone is constructed by using a heat storage medium at 800-1200 DEG C, so that the tar conversion efficiency is remarkably improved; in the reforming hydrogen production process, a heat storage medium is used for replacing traditional natural gas combustion for heat supply, and a stable reaction environment of 800-1000 DEG C is maintained; in the aspect of waste plastic treatment, deep conversion of organic components is realized by means of high-temperature heat storage, tar generation is effectively reduced, and dioxin formation is inhibited. By arranging a heat transfer path of a heat storage medium in each process, the energy utilization rate of each independent process is increased by more than 30%, the carbon emission is reduced by 50%, and a modularized high-temperature heat supply decarburization solution is provided for the industrial field.

The invention relates to the technical field of comprehensive utilization of solid wastes, and discloses a preparation method of a high-performance cement-based grouting anti-seepage slope-fixing material based on waste slag, which comprises the following steps: obtaining carbide slag and desulfurized gypsum, mixing and grinding to obtain a superfine low-hardness composite activator; independently grinding the granulated blast-furnace slag to obtain hard superfine slag powder; putting the superfine slag powder and the composite exciting agent into high-speed powder modification equipment according to a specific proportion, and driving the composite exciting agent to plastically deform and mechanically embedded into surface defects of the superfine slag powder by utilizing impact kinetic energy provided by linear speed and Mohs hardness difference of the superfine slag powder and the composite exciting agent, so as to form core-shell structure composite particles with mechanical interlocking interfaces; according to the invention, by constructing a mechanical chimeric core-shell structure, space-time decoupling of high rheological property in a slurry construction period and high strength in a hardening period is realized.

The invention provides a high-performance rare earth composite calcium carbide furnace cover refractory castable and a preparation method thereof. The castable comprises the following raw materials in parts by weight: 100 parts of casting mixture, 0.5-3 parts of rare earth oxide, 0.1-0.2 parts of explosion-proof fiber, 0.1-0.3 parts of water reducer and 5-8 parts of water; wherein the casting mixture is composed of the following raw materials in parts by weight: 50-68 parts of brown corundum, 15-20 parts of mullite, 5-10 parts of aluminate cement, 4-7 parts of alumina micropowder, 4-6 parts of silicon oxide micropowder, 3-5 parts of clay additive, and 1-2 parts of chromium oxide green. The preparation method comprises: sieving brown corundum and mullite to the required particle size; weighing the above raw materials and their proportions, and then putting all the raw materials except water into a mixer and stirring for 10-20 minutes to fully mix the materials; after the materials are stirred evenly, slowly adding 5-8 parts of water and stirring until the castable is in a viscous state. The refractory castable provided by the invention improves the mechanical strength and thermal shock resistance of the furnace cover castable while ensuring that the furnace cover castable does not peel off or form a skin.

The invention discloses a titanium gypsum-based baking-free brick and a preparation method of the titanium gypsum-based baking-free brick, and belongs to the technical field of recycling of inorganic non-metallic materials and solid waste. 5.0 to 25.0 percent of cement; 0 to 30.0% of gravel aggregate; 0-15% of slag powder; the titanium gypsum is subjected to crushing and scattering treatment. The preparation method of the titanium gypsum-based baking-free brick comprises the following steps: adding 65.0-85.0% of titanium gypsum particles; 10.0 to 35.0% of cement; 0 to 30.0% of gravel aggregate; 0-15% of slag powder; stirring and mixing 0-3% of carbide slag, dispersing a curing agent and a waterproof agent in water, fully stirring with the mixture, and preparing the materials into green bricks through a two-way static pressure brick making machine; and finally, curing to obtain the high-performance titanium gypsum baking-free brick. The method is an effective method for efficiently utilizing the titanium gypsum baking-free brick at low cost.

The utility model discloses an opening and closing device based on a calcium carbide pot inserting plate, which comprises a horizontally arranged base, a first driving mechanism is arranged on the base, the first driving mechanism is in transmission connection with a sliding seat, the sliding seat is in sliding connection with the base, the sliding seat is rotatably connected with a base cylinder, and the base cylinder is connected with the calcium carbide pot inserting plate. A sliding column is connected into the base cylinder in a sliding mode, an arm plate and an electric push rod are connected to the sliding column, two movable plates are connected to the arm plate in a sliding mode, operation hooks are connected to the movable plates, and the two movable plates move reversely through a second driving mechanism; the calcium carbide pot inserting plate has the advantages that the special calcium carbide pot inserting plate structure is designed, the calcium carbide pot inserting plate opening and closing device with the higher automation degree is designed in a matched mode, opening and closing of the calcium carbide pot inserting plate do not need manual operation, long-distance operation is achieved, meanwhile, operation is more efficient and faster, and the calcium carbide pot inserting plate opening and closing efficiency is improved. Dangerous accidents such as scald and crashing injury are effectively avoided, and the device is worthy of wide-range popularization and application.

The invention belongs to the technical field of building materials, and particularly relates to a silicon-aluminum material as well as a preparation method and application thereof. The silicon-aluminum material comprises 10-65 parts by weight of red mud, 20-60 parts by weight of slag powder, 0-20 parts by weight of Portland cement clinker, 0.1-8 parts by weight of an exciting agent and 5-15 parts by weight of an expanding agent; wherein the expanding agent is prepared from the following components in percentage by mass: 0 to 60 weight percent of aluminum sulfate, 0 to 70 weight percent of carbide slag, 0 to 70 weight percent of tricalcium aluminate, 0 to 60 weight percent of calcium sulphoaluminate and 0 to 60 weight percent of gypsum, and the content of at least two components in the expanding agent is not 0. The silicon-aluminum material with specific components and content can give consideration to both high strength and low shrinkage rate, and when the silicon-aluminum material is used in cement mortar, the compactness of cement can be enhanced and cracking can be prevented, so that the material can be used for a long time.