32results about How to "Achieve pyrolysis" patented technology

The invention provides a method for preparing ferro-silicon-aluminum by using a waste refractory material as a raw material through smelting in an electric arc furnace. According to the method, the waste refractory material is used as the raw material; an aluminum cell waste cathode carbon block is used as a reducing agent; pulverized fuel ash is used as an additive to adjust the content of aluminum in the raw material; diatomite waste residues are used as an additive to adjust the content of silicon in the raw material; the aluminum oxide and silicon oxide-based material is subjected to high-temperature reduction in the electric arc furnace to prepare the ferro-silicon-aluminum alloy with certain components; in the high-temperature reduction process, the decomposition of cyanide in the waste cathode carbon block, and the volatilization and recovery of fluoride, chloride and alkali metals in the material are realized; and the comprehensive utilization of various hazardous wastes and solid waste is realized in the same process.

The invention discloses a two-step flotation treatment method for incineration fly ash of medical waste. The following steps are adopted: 1) decarbonization flotation to obtain two products of enriched carbon and primary tailings, and sending the enriched carbon product into garbage Combustion in the second combustion chamber of the incinerator; 2) acid leaching filtration: add inorganic acid to the primary tailings obtained in step 1) to carry out acid leaching and then filter to obtain two products: residual ash and heavy metal waste liquid; the residual ash is directly sent to domestic garbage Landfill for safe landfill disposal or reuse; 3) Ion flotation: Add flotation agents to the heavy metal waste liquid obtained in step 2) to carry out ion flotation to obtain two products of heavy metal concentrated foam and waste water; concentrate the heavy metal The foam is sent to the smelter to recover heavy metals Pb and Zn, and the wastewater is neutralized and discharged into the sewage system after reaching the standard. The invention has the advantages of simple operation, low cost, good treatment effect and no secondary pollution.

The invention discloses coal pyrolysis equipment. The equipment comprises a coal pyrolysis device used for performing pyrolysis on coal, a coal conveying device used for conveying coal to the coal pyrolysis device, a power source used for providing power to the coal conveying device, a pyrolysis gas dust collection device used for collecting dust for gas after coal pyrolysis, and a dust-removing particle supply device used for supplying dust-removing particle supply device to the pyrolysis dust-collection device. The coal pyrolysis equipment has high automatic degree and high utilization of dust-removing particles.

The invention provides a method for preparing a silicon-iron alloy by using aluminum ash as a raw material and feeding material by a hollow electrode. According to the method, secondary aluminum ash is used as a raw material, an aluminum electrolysis cell waste cathode carbon block serves as a reducing agent, fly ash serves as an additive to adjust the content of aluminum in the raw materials, diatomaceous earth waste residues serve as additives to adjust the content of silicon in the raw materials, and high-temperature reduction in an electric arc furnace takes aluminum oxide and silicon oxide as main materials so as to prepare a certain-component aluminum-silicon-iron alloy; the hollow electrode is used for conveying powdery materials, so that the smelting process of the whole electric arc furnace can be enhanced, reduction of oxides and volatilization of fluoride are promoted, particularly, decomposition of the toxic substance aluminum nitride and the cyanide is accelerated, the production efficiency is improved, the production cost is reduced, and comprehensive utilization of various dangerous waste and solid waste is realized in the same process.

The invention provides a method for preparing a silicon-iron alloy with a raw material of aluminum ash and through plasma jet feeding. According to the method, the quadratic aluminum dust is used as the raw material, an aluminum electrolysis cell waste cathode carbon block is used as a reducing agent, the aluminum content in the raw material is adjusted by taking fly ash as an additive, the content of silicon in the raw material is adjusted by taking diatomaceous earth waste residue as an additive, and high-temperature reduction is conducted on materials mainly containing aluminum oxide and silicon oxide in an electric arc furnace to obtain a certain-component aluminum-silicon-iron alloy; and a powdery material is conveyed by adopting a plasma flame flow, the reaction temperature can be increased by heating the material, reduction of the oxides and volatilization of fluoride can be accelerated, particularly decomposition of aluminum nitride in the aluminum ash, decomposition of cyanide in the waste cathode carbon block, volatilization and recovery of the fluoride, chloride and alkali metals in the material are realized in the high-temperature reduction process, the high-temperature reaction process of the whole electric arc furnace smelting is enhanced, and the production efficiency is improved, and the comprehensive utilization of each-kind dangerous waste and solid waste isrealized in the same process.

The invention discloses an adsorbing material for adsorbing perfluorinated compounds in a water body. The adsorbing material is prepared by taking iron tailings as a main raw material, taking straw powder and fly ash as doping agents, adding cement, mixing, granulating, maintaining and performing anoxic roasting. The raw materials comprise the following components in percentage by mass: 50-75% ofiron tailings, 5-35% of straw powder, 5-15% of fly ash and 10-25% of cement. The iron tailings comprise, by mass, 48%-53% of SiO2, 13%-18% of CaCO3, 8%-13% of Fe2O3, 6%-8% of Al2O3 and 5%-13% of othercomponents. The adsorbing material is low in cost, simple and convenient in process and high in removal efficiency.

The invention provides a method for preparing an aluminum silicon iron alloy through hollow electrode feeding by using a waste refractory material as a raw material. The waste refractory material is used as the raw material, an aluminum cell waste cathode carbon block is used as a reducing agent, pulverized fuel ash is used as an additive to adjust the aluminum content in the raw material, kieselguhr waste residues are used as an additive to adjust the silicon content in the raw material, and high temperature reduction is carried out on materials with aluminum oxide and silicon oxide as main in an electric-arc furnace to prepare the certain-component aluminum silicon iron alloy; and a hollow electrode is used for transporting powder materials, the entire electric-arc furnace smelting process can be strengthened, reduction of oxide and volatilization of fluoride are promoted, the decomposition of toxic substances cyanide and volatilization and recovery of the fluoride, chloride and alkali metals in the materials are especially accelerated, the production efficiency is improved, the production cost is reduced, and comprehensive utilization of a variety of hazardous waste and solid waste in the same process is achieved.

The invention discloses a biomass poly-generation method and a system based on a triple medium and low temperature fluidized bed. The system comprises a biomass fluidized bed drying furnace, a biomassfluidized bed pyrolyzing furnace and a biomass fluidized bed gasification furnace, wherein a first biomass inlet for allowing biomass with a high water content to enter is formed in the biomass fluidized bed drying furnace; a second biomass inlet for allowing biomass with a low water content and a high volatile matter content to enter is formed in the biomass fluidized bed pyrolyzing furnace; anda third biomass inlet for allowing a biomass raw material to enter is formed in the biomass fluidized bed gasification furnace. According to the system and the method, graded utilization of the biomass raw material is achieved by the triple fluidized bed; sectional conversion of drying, pyrolyzing and gasification of the biomass raw material can be achieved; products of all conversion working sections can achieve efficient poly-generation; and the best economic benefit of a whole project can be achieved.

The invention provides a method for preparing ferro-silicon-aluminium by using waste refractory materials as raw materials through plasma jet feeding. The waste refractory materials are used as raw materials. An aluminum electrolysis cell waste cathode carbon block is used as a reducing agent. The aluminum content in the raw materials is adjusted by taking fly ash as an additive. The silicon content in the raw materials is adjusted by taking diatomite waste residues as an additive. High-temperature reduction is carried out on raw materials mainly including aluminum oxide and silicon oxide in an electric arc furnace to prepare a certain-component aluminum-silicon-iron alloy. In the high-temperature reduction process, cyanide in the waste cathode carbon block is decomposed, and the volatilization and recovery of fluoride, chloride and alkali metals in materials are realized. The comprehensive utilization of a plurality of kinds of dangerous waste and solid waste is realized in the same process.

The invention discloses a biomass pyrolysis system and a biomass pyrolysis method. The biomass pyrolysis system comprises a pyrolysis furnace, a combustion lift pipe, a separation device, a biochar heat carrier pipeline and a smoke flue. According to the biomass pyrolysis system, efficient biomass pyrolysis is realized through simultaneous heating by the aid of internal biochar heat carriers and external smoke.