238results about How to "Save mineral resources" patented technology

The invention relate to a method of extracting scandium from red mud, the method utilize the red mud that come from the process of producing aluminum oxide from alumyte, in accordance with specific characteristics of red mud, applying hydrochloric acid leach, P204 abstraction, acid-washing edulcoration, sodium-hydroxide back extraction, ammonia modifier hydrolytic decomposition zirconium and titanate in hydrochloric acid solution, oxalic acid precipitating scandium and medium temperature calcining technique, the purity of final production Sc2O3 is 99.9%. Extracting scandium from red mud change refuse into available material, save mineral resources, benefiting environmental conservation. The invention also fills up the study vacant of isolation technique in high-strength zirconium titanate and scandium.

The invention provides a multifunctional inorganic thermal insulation material composition, a multifunctional inorganic thermal insulation material product prepared from the multifunctional inorganic thermal insulation material composition and a preparation method of the multifunctional inorganic thermal insulation material product. By substantially utilizing industrial and construction wastes as a gel enhancement and inorganic thermal insulation system and adding a little amount of cement as well as a proper amount of regulator, the multifunctional inorganic thermal insulation material composition is molded in a casing mode by one step, thereby forming a wall plate, a block material (wall materials decorated by wall floor tiles) and a roof. Therefore, the wall body, the block material and the roof have the multifunction and the characteristics of thermal insulation, fire prevention, water resistance, freezing resistance, crack resistance, sound insulation, light weight, corrosion resistance, weather resistance, decoration, energy conservation, environmental friendliness, safety, sanitation, work saving, time saving, cost saving and the like.

The invention relates to an anticorrosion expansion compacting agent composition and a preparation method thereof; the composition comprises the following components by weight: 15-35% of aluminium-containing compounds, 0-8% of zirconium-containing compounds, 2-10% of magnesium salts, 0-3% of titanium dioxide compounds, 0-6% of lithium salts, 2-6% of alkanolamine salts, 0-10% of super-plasticizers, 0-10% of solidification adjusting agents, 0-5% of acids, and the balance of carriers. The components are reacted in a reaction vessel at 80 DEG C+/-5 DEG C for 3 hours, and then cooled to 45 DEG C+/-5 DEG C; thermal insulation is performed for one hour; and anticorrosion expansion compacting agents of a standard type, a solidification-promoting type, or a pumping slow-solidifaction type are obtained according to the added solidification adjusting agents with different types and amounts.

The invention relates to the waste reusing technology, in particular to a precision casting waste sand reusing method. The precision casting waste sand contains mullite, mullite sand, zirconite and zircon sand. The precision casting waste sand is cleaned, dried, crushed and screened to form aggregate and powder for a fireproof casting material; and a bonding agent and an admixture are added into the aggregate and the powder, and the components are mixed and homogenized to form the fireproof casting material. The method solves the problem that the conventional precision casting waste sand pollutes the environment.

The invention discloses a regeneration method of steelmaking carbonic crushed bricks. The regeneration method comprises the following technical flow steps of: piling in classification; sorting; removing impurities; preprocessing; drying; crushing; screening; packing; and producing a regeneration product. Regeneration grains can be used for producing regenerated magnesia carbon bricks, aluminum-magnesium-carbon bricks, aluminum carborundum carbon bricks, tundish dry materials, aluminum-magnesium-carbon fireclay and slag-pot unfired bricks. The regeneration use rate of the carbonic crushed bricks can reach as high as 100 percent. The invention saves resources, clears garbage and protects the environment.

The invention relates to the technical field of active calcium oxide, desulfurizing agents, calcium carbide raw materials and preparation methods of active calcium oxide, in particular to active calcium oxide with calcium carbide dreg as a raw material, a desulfurizing agent, a calcium carbide raw material and a preparation method of active calcium oxide. The active calcium oxide with the calcium carbide dreg as the raw material is obtained through the following steps: firstly, the calcium carbide dreg is subjected to filter pressing, and primary wet dreg is obtained. According to the active calcium oxide with the calcium carbide dreg as the raw material, the desulfurizing agent, the calcium carbide raw material and the preparation method of active calcium oxide, the calcium carbide dreg is turned into wealth, accordingly, the problem of adverse influence on the environment due to stacking of a large amount of calcium carbide dreg is solved, and the environment is effectively protected; besides, utilization of mineral resources such as limestone is reduced, the mineral resources such as the limestone are saved, and the idea of harmonious development of economic development and environment protection is realized; meanwhile, according to the active calcium oxide with the calcium carbide dreg as the raw material, the desulfurizing agent, the calcium carbide raw material and the preparation method of active calcium oxide, the purity of the desulfurizing agent can be improved; moreover, the cost of the calcium carbide raw material for producing calcium carbide is lower, and industrial application prospect is realized.

The invention provides a magnesia carbon brick and a preparation method thereof, belonging to the field of refractory materials. The raw materials of the magnesia carbon brick include 30-80 parts of waste magnesia carbon brick grains, 3-40 parts of magnesia grains, 6-12 parts of graphite, 5-15 parts of magnesia powder, 3-15 parts of micro powder additives, 2.2-3.5 parts of organic bonds by weight. The preparation method is characterized by sorting, hydrating, drying and grinding the waste magnesia carbon bricks from the steel mills and then mulling the waste magnesia carbon brick grains with other raw materials, forming and carrying out heat treatment to prepare the magnesia carbon brick. The energy-saving and environment-friendly aluminium-magnesia carbon brick prepared by the invention has high compression strength, low porosity, good resistance to molten steel corrosion and service life reaching or exceeding the service lives of the traditional aluminium-magnesia carbon bricks. In the invention, the waste aluminium-magnesia carbon bricks are rationally utilized and consumption of the mineral resources is reduced.

The invention relates to treatment of waste metal materials, and in particular relates to a method for recycling germanium, gallium, indium and selenium in a waste diode. The recycling method comprises the following steps of: (1) crushing the waste diode; (2) separating plastic powder from metal powder; (3) oxidizing roasting; (4) recycling selenium; and (5) recycling gallium, indium and germanium. By using the method, the pollution of the diode on the environment is reduced, valuable elements of selenium, indium, gallium and germanium are recycled, and mineral resources are saved; and the method is simple to operate, lower in cost, high in recycling rate of selenium, indium, gallium and germanium elements and very high in purity of recycling products.

The invention relates to a reworked material working lining of a continuous casting tundish and a preparation method for the reworked material working lining. The reworked material working lining is divided into an impact zone working lining and a non-impact zone working lining, which are internally attached to a permanent lining; the non-impact zone working lining sequentially comprises a ladle edge working lining, a ladle wall working lining and a ladle bottom working lining from top to bottom; the impact zone working lining is built by adopting waste magnesia-carbon bricks and regenerated coating material mud through a wet process; the ladle wall working lining and the ladle bottom working lining are built by adopting a regenerated dry material; an overflow port working lining and the lade edge working lining are built by adopting the regenerated coating material; a space between the two sides of a turbulent flow controller and the ladle wall permanent lining is filled by waste; and a regenerated coating material layer coats the outer surfaces of the waste magnesia-carbon bricks, the outer surface of the waste and the upper surface of the turbulent flow controller. By applying the reworked material working lining, the service life of a shaped blank continuous casting tundish reaches 33-38 hours, and refractory material cost of the regenerated material working lining is reduced by more than 60% year on year.

The invention provides an aluminum electrolysis dangerous solid waste comprehensive treatment method and resource utilization. According to the aluminum electrolysis dangerous solid waste comprehensive treatment method, other solid waste, except for waste anodes and waste aluminum dust, of aluminum electrolysis can be recycled, treatment processing is carried out through multiple procedures of primary election impurity removal, magnetic separation iron removal, flotation carbon removal, smelting reduction and the like, all aluminum electrolysis solid waste is effectively treated, renewable resources are all comprehensively utilized, and finally aluminum-silicon alloy products, electrolyte products for aluminum electrolysis, fuel powdered carbon products and the like are produced; and solidwaste treatment of the aluminum electrolysis industry is achieved, valuable resources containing aluminum, silicon, fluorine and the like are recycled and reutilized, and the good aims of protectingthe environment, saving resources and creating benefits are achieved.

The invention relates to a method for smelting medium/high-carbon hard-wired steel by vanadium-titanium containing molten iron, belonging to the technical field of metallurgy, wherein the technical scheme is as follows: vanadium-titanium containing molten iron is used as raw material; a molten iron vanadium extracting pre-processing technology is adopted in a converter steelmaking process, to produce two parts of semi-steel, and one part of the semi-steel, which is used for converter steelmaking, is referred to as steelmaking semi-steel, and the other part, which is used for recarburizing molten iron produced by the steelmaking converter, is referred to as recarburizing semi-steel; on the end point of converter smelting, a low-tensile carbon method is adopted to tap; the alloying process is recarburized little or not recarburized; after tapping, a certain amount of recarburizing semi-steel is mixed in the molten iron depending on the carbon content in the molten steel to recarburize until the molten iron carbon component is qualified, so the problems of uneven carbon element distribution in the recarburized steel, lower than 0.010% of vanadium element and lower than 0.005% of nitrogen element of the recarburizing agent are solved. By a process that the recarburizing semi-steel skips over the converter smelting and is directly turned into qualified molten steel while mixing the recarburizing semi-steel in the molten liquid to recarburize, the smelting cost of the converter smelting is directly saved.

An activated composite waste dregs powder used for cement, concrete and non-calcine brick is prepared from acidified zeolite powder, lead or copper dregs, carbonate stone powder, phosphate dregs (ardealite), lime dregs and powdered coal ash as basic materials. Its advantages are high property and low cost.

A process for extracting scandium (Sc) from the silt in river includes such steps as classifying, gravitational separation, magnetic dressing, electric dressing to obtain titanaugite concentrate, leaching, extracting, phase transfer, and purifying. Its advantages are high effect and low cost.

The invention discloses a bacillus cereus for activating soil nutrient and application of the bacillus cereus. The bacillus cereus is preserved in the China General Microbiological Culture Collection Center (CGMCC) on May 21, 2012 with preservation number of CGMCC No. 6127, and the 16SrDNA nucleotide sequence is shown by SEQ ID No: 1. According to the bacillus cereus, the soil nutrient can be obviously activated, the effectiveness of phosphorus and nitrogen in soil can be improved, the composition of a soil microbial community can be improved, the diversity and the evenness of the soil microbial community can be improved, the metabolic activity of the soil microbe can be improved and the like, the soil fertility can be improved, the crop growth can be promoted, the bacillus cereus is good for the agricultural sustainable development and utilization, and the bacillus cereus is wide in application prospect in the production practice.

The invention provides a preparation method of iron-based low-rare earth NdFeB rapid quenching permanent magnetic powder. The preparation method comprises the procedures of: raw material preparation, vacuum melting, vacuum rapid quenching, primary pressing, crystallization thermal treatment, powder preparation, and magnetic property and physical property detection, wherein in the raw material preparation procedure, the iron-based low-rare earth NdFeB rapid quenching permanent magnetic powder is prepared from the following raw materials in percentage by weight: 15.5-19% of praseodymium-neodymium alloy, 3-7% of lanthanum-cerium alloy, 4.5-5.5% of zirconium, 1.15-1.25% of boron, and the balance of iron, thereby forming prepared materials. The use amount of the praseodymium-neodymium alloy is reduced by 19%, the lanthanum-cerium alloy is properly added, the performance index can achieve Hcj9.592, (BH)m9.751 through proper magnetic separation, and the property of the magnetic powder can achieve 14.38MGO. By utilizing the preparation method, the best result of producing the iron-based low-rare earth NdFeB rapid quenching permanent magnetic powder through a vacuum rapid quenching manner can be realized, the economic benefits can be directly improved by about 15%, thereby striding a new pace for saving limited mineral resources.

A multilayer composite film with solid multicolor patterns for decorative use comprises a plastic bottom film layer. The technical proposal of the composite film is that a thermal sol layer, a metal deposition layer or a multicolor dyeing film layer with convex and concave solid patterns or solid embossing patterns, transparent double adhesive vinyl, and a transparent film layer with characters or/and patterns are arranged on the plastic bottom film layer in sequence. The invention has the advantages that the composite film adopts metal film composite materials and a multicolor printing and cold mounting process, so as to achieve the sense of metal of metal tags and the rich color change which can not be reached by the metal tags, thereby saving a large amount of mineral resources. The process produces no smell, no pollution or noise, and is more environment-friendly and beautiful compared with the chemical corrosion process for producing the traditional tag, and improves the production efficiency by more than 10 times. The invention particularly adopts the thermal sol layer with a certain thickness. In the invention, the thermal sol layer is not only a bounding layer, but also a framework layer for the metal layer composite material to form the permanent solid pattern.

The high concentration kaolin beneficiating process includes the following steps: providing raw kaolin ore; stirring and dispersing raw kaolin ore in the presence one water and dispersant while maintaining viscosity in 7.6-78.3 comprise; desanding the dispersed kaolin ore in a screw grader; elutriating desanding obtained coarse quartz sand in a secondary screw grader and a third screw grader; and returning the ore slurry from the secondary screw grader to the raw kaolin ore stirring and dispersing step and the ore slurry from the third screw grader to the secondary screw grader. The process can ensure the ore slurry concentration within 45-55 %, is favorable to kaolin beneficiating operation and post treatment, and has kaolin mineral resource recovering rate as high as 95 % and low water consumption.