613 results about "Calcium carbide" patented technology

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 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 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 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 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 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 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 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 utility model discloses a system for producing sodium carbonate by using carbon dioxide and carbide slag in boiler flue gas, which is characterized in that the boiler flue gas discharged by a coal-fired boiler is purified and then enters a carbonization tower instead of part of lime kiln gas to react with ammoniacal salt water to generate NaHCO3, the NaHCO3 is calcined to generate a final product sodium carbonate, carbon is fixed to the final product, and the emission of CO2 is reduced; and meanwhile, the consumption of CO2 generated by calcining the limestone is reduced, so that the consumption of the limestone and the coke is greatly reduced. Calcium carbide slag generated by a calcium carbide method PVC production device is ground and screened to obtain coarse powder, fine powder and superfine powder, the coarse powder, the fine powder and the superfine powder are mixed in proportion to obtain a calcium carbide slag powder mixture with reasonable grain size distribution, the mixture is used for preparing lime milk, lime milk meeting the ammonia distillation requirement of a sodium carbonate system can be prepared without adding quick lime, the lime milk is used for the ammonia distillation system, and the production cost is reduced. Lime milk notches caused by reduction of lime yield are supplemented, and meanwhile, the utilization value of the solid waste carbide slag is improved.

The invention relates to the technical field of shield muck treatment, in particular to a preparation method of a high-carbon-sequestration shield muck baking-free brick, which comprises the following steps: mixing quick lime and steel slag micropowder in proportion, adding water, controlling the temperature, and standing to form an alkaline activated material; uniformly spreading the calcium-aluminum-iron-loaded red mud-based hydrotalcite on the surface of the alkaline activated material, and spraying slurry of carbide slag and water to form a hierarchical carbon sequestration precursor; after standing, adding water into the modified charcoal loaded with calcium magnesium phosphate and a water reducing agent, pre-stirring to form slurry, and adding the slurry into a hierarchical carbon sequestration precursor at a constant speed; adding the premixed original-state shield muck and a curing agent into the hierarchical carbon sequestration precursor, then adding high-calcium cement and fly ash, and stirring; after compression molding, curing and post-curing through a damp-heat curing and gradient pressurizing carbonization process to obtain the baking-free brick. A hierarchical precursor is constructed by quick lime, steel slag, red mud-based hydrotalcite and the like, and modified charcoal is combined, so that active ions are promoted to be dissolved out and uniformly distributed, the CO2 reaction efficiency is enhanced, and the carbon sequestration effect is improved.

The invention relates to the technical field of calcium carbide furnaces, and discloses an intelligent regulation and control system for a closed arc smelting furnace of an industrial silicon electric furnace. By integrating multiple types of sensors including electrical parameters, sound pressure frequency spectrum, infrared thermal image, feed opening vision and the like and adopting a data fusion algorithm, the application can analyze the condition in the furnace from multiple angles, especially through voiceprint recognition and thermal image analysis; state changes, which cannot be quickly sensed, of traditional electrical parameters such as a'micro-open arc ', a'local sintering' and a'material collapse precursor 'can be sensitively captured in an early stage, a data basis is provided for subsequent regulation and control, and timely regulation and control can be further facilitated. The control of each mechanism is performed based on the same intelligent decision, and the decision of the operator is recorded and fed back to the knowledge base under the situation of combined use with the man-machine collaborative intervention interface, so that the dependence on the original single fixed operation experience is gradually reduced, and the user experience is improved. And a cooperative control scheme for a plurality of control terminals is gradually improved and converted.

The utility model discloses a dust remover discharge structure in a calcium carbide dust removal station, which comprises a dust remover, a plurality of discharge ports are arranged at the bottom end of the dust remover, a fixed sleeve is sleeved outside each discharge port, the top end of each fixed sleeve is respectively and fixedly connected with the bottom end of the dust remover, two semi-conical barrels are arranged in each fixed sleeve, and the two semi-conical barrels are respectively connected with the bottom end of the dust remover. The two semi-conical barrels are used for discharging, so that the situation of blockage caused by accumulated materials can be avoided to the greatest extent under the cooperative use of the two semi-conical barrels and the cleaning rod, meanwhile, an arc-shaped groove and a threaded connecting ring are arranged, so that a collecting bag is pressed, secondary pollution is avoided, and meanwhile, the two semi-conical barrels can be closed firstly under the situation, so that the cleaning rod is convenient to clean. And the collecting bag can stay and stand, so that secondary pollution is further avoided, and the dust collector is simple and convenient to operate.

The utility model relates to gas purification technical field especially is a calcium carbide method acetylene gas purification device, including washing tower, circulating pump, cooler and collector, the one side lower extreme of washing tower is installed for the acetylene pipe of air inlet, the top of washing tower is installed for the first connecting pipe of air outlet, the other end of first connecting pipe is connected in the one side lower extreme of cooler, and the other side of cooler is installed for the heat exchange pipe of cooling use, the top of cooler is installed with second connecting pipe, and the other end of second connecting pipe is installed with collector, and the top of collector is installed with the air pipe, in the utility model, integrated acetylene gas purification process, after entering washing tower, acetylene gas is fully washed through the multistage shower nozzle structure of inside back type setting, can effectively remove the alkali liquor and small impurities of entrainment, improve gas quality, and the cooler of cooperation setting can further reduce gas temperature and moisture content, improve the stability of subsequent reaction.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an environment-friendly fluorine and heavy metal-containing water treatment agent and a preparation method thereof. The environment-friendly fluorine and heavy metal-containing water treatment agent is prepared from the following raw materials in parts by mass: 8 to 12 parts of calcium carbide waste residue, 5.5 to 7.5 parts of clay modifier, 8 parts of gel substrate, 1 to 2 parts of PVP (Polyvinyl Pyrrolidone), 0.5 to 1.5 parts of polyacrylamide and 0.1 to 0.3 part of polyformaldehyde fiber. The calcium carbide waste residue is taken as a core, and calcium fluoride precipitation, heavy metal adsorption and wastewater neutralization can be realized by alkalinity of the calcium carbide waste residue; straw powder particles and citric acid modified clay form a porous structure and Lewis acid sites, and heavy metal adsorption is enhanced; fe3O4 generates flocculate under alkalinity, and the flocculate and clay form a crystal phase to improve the strength; a chitosan-modified diatomite composite gel substrate promotes ion diffusion, prevents pore blockage and stabilizes the structure; the agent is low in cost, high in stability and capable of synchronously and deeply removing fluorine and heavy metal.

The invention relates to an extraction agent and an extraction method, and relates to the technical field of wet extraction of industrial solid waste, and the extraction agent comprises the following components in parts by mass: an extraction main agent, an anti-impurity stabilizer and an extraction aid; the extraction main agent comprises di (2-ethylhexyl) phosphate and mono (2-ethylhexyl) phosphate, the impurity-resistant stabilizer comprises an imidazoline derivative, a triazine derivative and dimethyl methylphosphonate, and the extraction assistant comprises isooctyl alcohol; the extraction method comprises the steps of ash ball preparation, impurity removal, extraction and the like. According to the extraction agent and the extraction method, interference impurities such as trace heavy metal ions, sulfides and cyanides generated due to component fluctuation in the purified ash of the calcium carbide furnace are selectively chelated, the impurities are prevented from being combined with the extraction main agent, and then the anti-interference stability of the extraction agent under the condition that the impurity content of the purified ash of the calcium carbide furnace fluctuates is improved; and the control difficulty in the production process is reduced.

A smelting wire (11) comprising a metal sheath (12) enclosing a core (14) containing a refining material (14), the refining material (14) comprising calcium carbide, the calcium carbide being located at or near the center of the core along at least a portion of the length of the core.

The utility model relates to the technical field of calcium carbide furnace purification, and discloses a special ash removal device for a calcium carbide furnace, which comprises a first calcium carbide furnace body, a second calcium carbide furnace body is arranged at the right end of the first calcium carbide furnace body, and air shock wave ash removal mechanisms are arranged at the outer ends of the first calcium carbide furnace body and the second calcium carbide furnace body. Sound wave ash removal mechanisms are arranged at the tops of the first calcium carbide furnace body and the second calcium carbide furnace body, and accumulated ash adhered to a heat exchange tube bundle can be removed through an air shock wave ash removal device by means of energy of instantly generated supersonic fluid shock waves (shock waves) through a pressure relief explosion release technology; compressed air is instantly emitted into the first calcium carbide furnace body and the second calcium carbide furnace body through the air shock wave ash removal mechanism, vibration and impact effects are generated in the equipment, dust and deposited carbon are removed from the surface of the equipment through the vibration and impact effects, the deposited dust can be effectively loosened and stripped, and therefore the ash removal effect is achieved.

The present invention provides a production method for reducing the incidence of edge cracks of Q235 wide and thick slabs, comprising the following steps: (1) converter smelting, with an iron-steel ratio of 850 kg / t, and adding silicon-manganese alloy and ferrosilicon weak deoxidation during the steel tapping process; (2) adding fluorite, lime, calcium carbide, and Taiwan aluminum to LF for strong stirring to promote sufficient pre-melting of the slag, diffusion deoxidation, and then power supply to form white slag, with the LF outlet composition controlled as follows: C: 0.15-0.18%, Si: 0.15-0.30%, Mn: 0.55-0.65%, P≤0.035%, ALs: 0.007-0.015%, S≤0.010%; (3) continuous casting process :A. The cross-section of the slab casting machine is 300mm×2200mm, and the casting speed is 0.80m / min; B. An immersion nozzle with an outlet inclination angle of 12°, an area of ​​4500 square millimeters, and an insertion depth of 110-140mm is adopted; C. Low melting point, low alkalinity, and low viscosity mold slag is used to slow down heat transfer; D. Weak cooling is adopted for secondary cooling water distribution; E. The side taper of the crystallizer is 1.2%; F. The sum of the inner and outer arcs of the wide surface taper of the crystallizer is controlled at 1.6-2.4mm, and the inner and outer arcs are both controlled at 0.8-1.2mm. The method of the present invention can reduce the incidence of subcutaneous cracks on the edge of Q235 wide and thick slabs to below 1%.

The invention relates to the technical field of calcium carbide slurry processing, and discloses a device for preparing dry calcium hydroxide powder from calcium carbide slurry, which comprises a plurality of groups of supporting legs, a drying cylinder is fixedly connected among the upper ends of the plurality of groups of supporting legs, the lower end of the left side of the drying cylinder is fixedly connected with a discharge pipe, and the upper end of the right side of the drying cylinder is fixedly connected with a mixing cylinder through a supporting frame; the lower end of the mixing cylinder penetrates into the drying cylinder and is fixedly connected with the drying cylinder, an electric heating plate is fixedly connected into the drying cylinder, a stirring shaft is rotationally connected into the drying cylinder, multiple sets of stirring blades are symmetrically arranged on the stirring shaft front and back, a motor is fixedly connected to the left end of the drying cylinder, and the output shaft end of the motor is fixedly connected with the left end of the stirring shaft. Through the synergistic effect of the material scattering diffusion assembly and the limiting mechanism, the additive is uniformly scattered under the cooperation of the rotating centrifugal force of the rotating disc and the shielding of the stepped material blocking cover, so that local block mass caused by one-time concentrated feeding is effectively avoided, the mixing time is remarkably shortened, and the energy consumption is reduced.

The application relates to an aerated concrete prepared from granite waste rock powder and a preparation method thereof. The aerated concrete of the application takes granite waste rock powder (skeleton effect), calcium carbide slag (calcic material), clay (sintering promotion), red mud (gel filling) and coal gangue (siliceous material) as core raw materials, replaces traditional natural sandstone and lime, realizes industrial solid waste resource utilization, conforms to the development direction of green building materials, and significantly reduces the dependence on natural resources.

The invention relates to the technical field of polyvinyl chloride production equipment, in particular to a hot water subsection control device and method for a calcium carbide method polyvinyl chloride production converter. The first-stage cooling assembly comprises a foreground conversion hot water tank, the output end of the foreground conversion hot water tank is connected with the cooling water outlet end of the first-stage converter through a first connecting pipe, and the output end of the foreground conversion hot water tank is sequentially connected with a first conveying pump assembly and a first hot water condenser. The output end of the first hot water condenser is connected with the cooling water inlet end of the first-section converter through a second connecting pipe. The method is beneficial to prolonging the service time of the catalyst and reducing the rebuilding frequency of the converter catalyst.

The application discloses a quaternary solid waste-based soil stabilizer (GSCP) for a base layer, which is composed of slag (GGBFS), steel slag (SSA), calcium carbide slag (CS) and phosphogypsum (PG) and has a weight ratio of GGBFS:SSA:CS:PG=56:24:12:8. The stabilizer forms C-S-H colloid and ettringite (AFt) through alkaline activation and sulfate activation, does not need to add cement or chemical activator, is used for stabilizing silty clay and steel slag mixed soil, and significantly improves the unconfined compressive strength, splitting tensile strength, water stability and freeze-thaw resistance. Compared with a traditional cement-based stabilizer, the application reduces carbon emission by 82% and cost by 31.25%, provides a low-carbon and economical solution for road engineering, and is suitable for the base layer and the subbase layer of a secondary road or above.

This invention provides a hot-quenched steel slag-based multi-solid waste synergistic composite cementitious material and its preparation method, comprising the following steps: preparing ultrafine powders: grinding and sieving the raw materials of the cementitious material to obtain various ultrafine powders; mixing ultrafine coal gangue powder, ultrafine calcium carbide slag powder, and a portion of ultrafine desulfurized gypsum powder, adding water, and mixing evenly to obtain a preliminary wet mixture; pressing; preparing clinker powder; mixing ultrafine hot-quenched steel slag powder, ultrafine slag powder, the remaining ultrafine desulfurized gypsum powder, and clinker powder, mixing evenly, and sealing for storage to obtain the cementitious material. Through the synergistic effect of hot-quenched steel slag-based multi-solid wastes, the cementitious material is prepared without the use of chemical alkaline activators, achieving effective resource utilization of steel slag, reducing waste, and mitigating carbon emissions and land occupation caused by long-term steel slag accumulation, resulting in significant environmental and social benefits.

This invention relates to the field of fire prevention and extinguishing technology in goaf areas, and proposes a fire prevention and extinguishing material and method for goaf areas. The fire prevention and extinguishing material comprises the following raw materials in parts by weight: 60-80 parts water, 50-60 parts fly ash, 15-25 parts calcium carbide sludge, 5-10 parts polyethylene glycol, 10-20 parts polyacrylamide, 15-20 parts flame retardant, and 2-8 parts imidazole ethanol. This technical solution solves the problem of poor flame retardancy and protective properties of existing goaf fire prevention and extinguishing materials.

The utility model relates to a carbide slag dry powder anti-blocking device in the technical field of carbide slag. The carbide slag dry powder anti-blocking device comprises a storage bin, a discharging pipe is arranged at the bottom of the storage bin, a stirring assembly is arranged at the joint of the discharging pipe and the storage bin, and a drying assembly is arranged in the discharging pipe below the stirring assembly. The stirring assembly comprises a horizontal rotating rod, one end of the horizontal rotating rod extends out of the discharging pipe and is connected with a first stepping motor, a plurality of stirring rods are fixed to the horizontal rotating rod, the drying assembly comprises an air distribution ring, the air distribution ring is fixed to the inner wall of the discharging pipe, air spraying holes are evenly distributed in the inner ring face of the air distribution ring, and the air distribution ring is connected with an air inlet pipe. According to the utility model, crushing can be carried out when carbide slag dry powder in the storage bin blocks the discharge pipe, the discharge pipe is prevented from being blocked, and when the discharge pipe is not blocked, the stirring assembly does not work, so that energy is saved; and meanwhile, the dry powder can be dried, blockage caused by caking of the dry powder due to high humidity during pneumatic transportation is avoided, the dry powder transportation efficiency is improved, and subsequent production is facilitated.

The utility model relates to the field of acetylene production, in particular to an acetylene production electric stone feeding device which comprises an external frame, four sets of lifting lugs are fixedly connected to the top end of the outer wall of the external frame, a storage barrel is arranged on the side wall of the inner side of the external frame, a vibration mechanism is arranged on the side wall of the inner side of the external frame, and the vibration mechanism is arranged on the side wall of the outer side of the external frame. A degradation assembly is arranged on the inner wall of the bottom end of the external frame, a support is fixedly connected to the side wall of the inner side of the external frame, a limiting assembly is arranged on the inner wall of the support, a hinge rod is hinged to the outer wall of a protruding block of a sliding block A, and a sliding block B is hinged to the end, away from the sliding block A, of the hinge rod. According to the calcium carbide discharging device, the contact block is driven by the double-shaft motor to rotate, so that the storage barrel moves up and down in a reciprocating manner, calcium carbide is prevented from being blocked at the discharging port, the discharging smoothness is ensured, the production efficiency is improved, meanwhile, the calcium carbide is uniformly discharged under the vibration action, and the production stability is improved.

This invention discloses a method for preparing green heating fuel from fish farming waste, comprising the following steps: (1) mixing papermaking sludge with acidic electroplating solution, sealing the mixture, and then heat-insulating it; after completion, drying and grinding the obtained solid product to obtain modified papermaking sludge powder for later use. (2) draining the water from the fish farming waste filtered out, then mixing the obtained wet material with calcium carbide powder and the modified papermaking sludge powder, stirring the mixture, and collecting the gas generated during the reaction; after the reaction is completed, sealing the obtained solid product and allowing it to stand to obtain a modified fuel matrix for later use. (3) mixing the modified fuel matrix with molasses and pressing it into granules to obtain the green heating fuel. The method of this invention not only converts fish farming waste into high-value biomass fuel, but also significantly reduces the energy consumption caused by the moisture in the dried waste.