392 results about "Copper slag" patented technology

The invention discloses a method for preparing battery-grade iron phosphate and lithium carbonate from a waste lithium iron phosphate battery, and belongs to the technical field of lithium batteries, the method comprises the following steps: slurrying a waste lithium iron phosphate positive electrode material, adding concentrated sulfuric acid for leaching, adding sodium sulfite, controlling reaction potential, and carrying out filter pressing after reaction to obtain a leachate; iron is added into the leachate to remove copper, and copper-removed liquid and copper slag are obtained after filter pressing; adding sodium dihydrogen phosphate into the copper-removed liquid to remove aluminum, and carrying out filter pressing to obtain aluminum slag and impurity-removed liquid; adjusting the pH value of the impurity-removed solution, adding hydrogen peroxide, reacting to obtain an iron phosphate dehydrate precipitate and an iron phosphate mother solution, and treating the iron phosphate dehydrate to obtain battery-grade anhydrous iron phosphate; adjusting the pH value of the iron phosphate mother liquor, carrying out filter pressing to obtain impurity-removed slag and a lithium sulfate solution, adding sodium carbonate into the lithium sulfate solution, carrying out heating reaction, filtering slurry to obtain a lithium carbonate wet material, and treating to obtain battery-grade lithium carbonate. According to the method, the problem of recycling the waste lithium iron phosphate battery material iron phosphate is solved, and comprehensive recycling of the iron phosphate and the lithium material is realized.

The invention discloses a method for producing iron powder by solid reduction treatment of copper smelting slag in a rotary kiln. Copper slag powder is obtained by crushing the copper smelting slag; carrying out solid-state reduction on the pellets containing the copper slag powder in a rotary kiln; carrying out magnetic separation on the reduced material to obtain iron powder and tailings; the pellets are fed into the rotary kiln from the tail of the rotary kiln, air is blown into the rotary kiln from a kiln head, and the reduced materials are discharged from the kiln head; the raw materials of the pellets comprise copper slag powder, limestone powder and pulverized coal. According to the method, the copper smelting slag is subjected to solid-state reduction treatment through the rotary kiln to comprehensively recover and produce the iron powder, and treatment and resource recycling of the copper smelting slag are achieved; the reduction, harmlessness and recycling of the industrial waste residues are realized, the investment is saved, the energy is saved, the consumption is reduced, the operation cost is low, and the popularization is easy.

The invention provides a low-shrinkage copper slag-based cementing material and a preparation method thereof, and relates to the field of solid waste utilization. The low-shrinkage copper slag-based cementing material is prepared from copper slag, slag, fly ash, standard sand, water, a water glass exciting agent, sodium hydroxide, a magnesium oxide expanding agent, a water reducing agent and magnesium-aluminum hydrotalcite. According to the invention, the defects in the prior art are overcome, the problem of environmental pollution caused by solid waste stockpiling can be solved by taking the copper slag and the fly ash as siliceous materials and the slag as a calcium-silicon raw material, and the method has important environmental protection significance for the society. The resource utilization of various solid wastes is realized, and the sustainable development of resources is promoted. The prepared cementing material has good physical and mechanical properties and durability, and the product performance meets the national standard requirement.

The invention discloses a method for recovering metal from high-nickel copper fire refining slag and application of the method, and relates to the technical field of metal metallurgy. Comprising the following steps: carrying out weak acid arsenic leaching on the copper fire refining slag to obtain arsenic-removed leaching slag and arsenic-containing copper liquid; copper removal is carried out on the arsenic-containing copper liquid to obtain a copper-containing material and copper-removed liquid, and arsenic precipitation is carried out on the copper-removed liquid; the arsenic-removed leaching residues are subjected to oxidation copper leaching to obtain copper leaching residues and a copper sulfate solution, and the copper leaching residues are subjected to reduction vulcanization smelting to obtain nickel matte, tin-antimony smoke dust and smelting residues. According to the method, the cost of separation of copper and arsenic in the raw materials can be reduced, the problem of furnace caking caused in the reduction smelting process is avoided, the obtained copper sulfate solution serves as electrolyte replenishing liquid to be applied to the copper electrolysis process, and the influence on the self-purification process of electrolyte is small. According to the method, nickel and copper are enriched in matte nickel through reduction vulcanization smelting, then copper-nickel separation is conducted through the post-treatment process, the post-treatment process is shorter, nickel recovery is achieved while copper recovery is guaranteed, and better economic benefits are achieved.

The invention discloses a welding slag ladle for containing copper slag and a design method. The welding slag ladle is suitable for containing, cooling and inverted placing procedures of high-temperature copper slag. The cinder ladle comprises a cylinder body, a ladle bottom, rib plates, trunnions and supporting legs, the cylinder body and the ladle bottom are formed by welding high-temperature-resistant and high-strength rolled plates, the thickness of the cylinder body is 70-100 mm, and the thickness of the ladle bottom is 80-120 mm; setting an inclination angle beta of 11.5-21 degrees relative to the center line of the bus of the cylinder body, and controlling the roughness of the inner wall to be less than or equal to 12.5 microns so as to reduce the separation resistance after the copper slag is cooled; thickness combination, stress distribution, deformation and rib plate arrangement are optimized through structural mechanical simulation, and it is ensured that the structural strength meets the requirements under high temperature and thermal cycle loads; full penetration weld joints are adopted, nondestructive testing is carried out, and the welding reliability is guaranteed; compared with a traditional casting cinder ladle, the mass of the cinder ladle is reduced by 10%-15%, the deslagging efficiency is improved, the service life is prolonged to more than two times of the original service life, and the cinder ladle has the advantages of being light in structure, high in bearing capacity, high in deformation resistance and good in maintainability.

The invention belongs to the technical field of slag waste heat recovery and comprehensive utilization, and particularly relates to a copper slag waste heat recovery system and a waste heat recovery method thereof. Comprising a slag ladle, a granulating bin is arranged at a slag outlet of the slag ladle, a spray gun is arranged in the granulating bin, and a revolving cup device is arranged on the spray gun; an outlet of the granulation bin is connected with a boiler, the boiler is connected with a waste heat boiler and a pyrolysis gasification furnace, and the boiler is connected with the waste heat boiler and the pyrolysis gasification furnace; the waste heat boiler is connected with power generation equipment, low-pressure steam generated after power generation of the power generation equipment is used for heating the user heat storage device, and condensate water generated by heating of the user heat storage device enters the boiler. The first hot air in the granulation bin enters the waste heat boiler, and superheated steam generated by the boiler enters the power generation equipment. The granulation method combining gas quenching and centrifugation is adopted, high-temperature gas and superheated steam at different temperatures are obtained through air and water cooling in different environments, the high-temperature gas and the superheated steam are specifically applied to a pyrolysis gasification furnace and a waste heat boiler, and efficient utilization of copper slag waste heat is achieved.

The invention provides a copper slag magnetic separation iron extraction method and application thereof.The copper slag magnetic separation iron extraction method comprises the steps that copper slag and a calcium oxide-based additive are mixed to obtain mixed copper slag, the calcium oxide-based additive comprises calcium oxide and / or a calcium oxide raw material, the calcium oxide raw material can generate calcium oxide through heating, and the calcium oxide raw material can generate calcium oxide through heating; the adding amount of the calcium oxide-based additive meets the condition that the total mass of the primary calcium oxide and / or the generated calcium oxide is 29%-47% of the mass of fayalite in the copper slag; the calcium oxide raw material comprises calcium carbonate and / or calcium sulfate; after the mixed copper slag is heated to 1250-1800 DEG C, heat preservation is conducted for 30-120 min, and modified copper slag is obtained; and the modified copper slag is sequentially subjected to slow cooling, crushing and magnetic separation, and iron is obtained. According to the method, the iron element is enriched in a liquid phase, and the recovery rate of iron resources in the copper slag is substantially increased from the source.

The embodiment of the invention relates to a method for recovering ferro-molybdenum through co-smelting of waste silicon-molybdenum rods and copper slag, and the method comprises the following steps: mixing the copper slag, the silicon-molybdenum rods, coke and calcium oxide to obtain a mixture; the mixture is heated, so that the copper slag and the coke are subjected to a smelting reduction reaction to obtain metal iron, molybdenum disilicide in the silicon molybdenum rod is subjected to a pyrolytic reaction under the action of the metal iron and calcium oxide, molten metal and molten slag are obtained, and the molten metal contains ferromolybdenum alloy components; according to the method, the molybdenum element in the waste silicon molybdenum rod can be fully enriched into iron, the recovery rate is high, the process is efficient and environmentally friendly, and waste liquid is not generated.

The invention provides a method and a device for recovering valuable metals from copper smelting slag, and the method for recovering valuable metals from copper smelting slag comprises the following steps: before molten copper smelting slag is transferred into a slag ladle for cooling, adding first gas, gypsum slag and nitrogen into the molten copper smelting slag in a plasma injection mode, and after injection is completed, adding second gas into the slag ladle for cooling; and metal gaseous substances and copper slag are obtained. Carrying out post-treatment and flotation on the copper slag to obtain a valuable metal sulfonium phase and depleted slag; wherein the first gas is one or more of CO, H2, CO2 and CH4; and the metal gaseous substances comprise gaseous lead and gaseous zinc. And the valuable metal sulfonium phase is sulfides of copper, iron, lead and zinc. The process method and device are simple, the production time is shortened, CO2 emission can be reduced, secondary pollution caused by waste water and waste residues is avoided, and the green metallurgy requirement is met.

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

The invention provides a copper slag self-pulverization iron extraction method and application thereof.The copper slag self-pulverization iron extraction method comprises the steps that copper slag and a calcium oxide-based additive are mixed to obtain mixed copper slag, the calcium oxide-based additive comprises calcium oxide and / or a calcium oxide raw material, the calcium oxide raw material can generate calcium oxide through heating, and the calcium oxide raw material can generate calcium oxide through heating; the adding amount of the calcium oxide-based additive meets the condition that the total mass of the primary calcium oxide and / or the generated calcium oxide is 29%-47% of the mass of fayalite in the copper slag; after the mixed copper slag is heated to 1250-1700 DEG C, heat preservation is conducted for 30-120 min, and modified copper slag is obtained; slowly cooling the modified copper slag at a cooling rate of 0.25-1 DEG C / min to obtain self-pulverization copper slag; and magnetic separation is performed on the self-pulverization copper slag, magnetite is recycled, and the technical problems of tedious production line and high energy consumption caused by the fact that procedures such as crushing and ore grinding cannot be avoided in the common technology are ingeniously solved.

The invention relates to a low-carbon high-performance cement clinker and a preparation method thereof. Relates to the technical field of building materials, in particular to a low-carbon cement clinker and a preparation method thereof. The cement clinker comprises the following raw material components in percentage by weight: 75-90% of a raw material, 5-20% of steel slag and 2-8% of a tempering material, and the tempering material comprises at least two of lead-zinc slag, copper slag, manganese slag and lithium slag. The weight percentage of the lead-zinc slag in the tempering material is 0-5.5% according to the oxide ZnO; the weight percentage content of the copper slag is 0-2.0% based on the oxide CuO; the weight percentage of the manganese slag is 0-7.0% in terms of oxide MnO2; and the weight percentage content of the lithium slag is 0-3.0 wt% according to the oxide Li2O. The tempering material is added, the purposes of stabilizing R-type tricalcium silicate and improving the strength of the clinker are achieved by guaranteeing the content of zinc or copper or manganese or lithium in the clinker, components such as fluorine and sulfur which pollute the environment are not additionally added, the clinker is environmentally friendly, safe and reliable, and the used raw materials are wide in source and high in applicability.

The invention discloses a preparation method of a mine filling material based on iron-rich solid waste and the obtained material.The preparation method comprises the steps that 5-30 parts by mass of steel slag powder, 40-50 parts by mass of copper slag powder, 5-20 parts by mass of red mud, 25-50 parts by mass of ferronickel slag powder, 10-12 parts by mass of carbide slag and 10-12 parts by mass of alkaline residues are subjected to dry mixing; then adding 10-15 parts by mass of water glass, 5-10 parts by mass of a water reducing agent, 5-10 parts by mass of a foaming agent and 10-40 parts by mass of water, mixing and stirring, and finally adding 100-250 parts by mass of tailings, and stirring again to obtain the mine filling material. According to the invention, various industrial wastes are utilized as resources and completely replace traditional cement raw materials, so that the production cost and carbon emission of the mine filling material are remarkably reduced, and the prepared mine filling material is good in compressive strength and improved in mechanical property.

The invention provides a method for extracting iron through copper slag sedimentation and application thereof.The method for extracting iron through copper slag sedimentation comprises the steps that copper slag and a calcium oxide-based additive are mixed to obtain mixed copper slag, the calcium oxide-based additive comprises calcium oxide and / or a calcium oxide raw material, the calcium oxide raw material can generate calcium oxide through heating, and the calcium oxide-based additive is added into the mixed copper slag; the adding amount of the calcium oxide-based additive meets the condition that the total mass of the primary calcium oxide and / or the generated calcium oxide is 29%-47% of the mass of the fayalite phase in the copper slag; the mixed copper slag is heated to 1200-1800 DEG C for ore phase reconstruction, and modified copper slag is obtained; and after the modified copper slag is crystallized and settled for 10-20 hours under the condition of heat preservation, mother liquor is collected, and an iron concentrated solution is obtained. According to the method, magnetite in the copper slag can be purified and recycled through devitrification and sedimentation, the process is simplified, and energy consumption and mineral separation pollution in the crushing and ore grinding process in the common technology are effectively avoided.

The invention discloses a preparation method of an iron-manganese bimetallic catalytic material by using copper slag. The preparation method comprises two steps of pretreating the copper slag and preparing the iron-manganese bimetallic catalytic material. The iron-manganese bimetallic catalytic material prepared by the method belongs to a porous material, is rich in pores and large in specific surface area, is rich in Fe < 3 + >, Mn < 3 + >, Mn < 4 + > and other active sites on the surface, has the advantages of high catalytic activity, good stability and environmental friendliness, and realizes reduction and high-value utilization of the copper slag. In addition, the prepared iron-manganese bimetallic catalytic material can be used for catalyzing persulfate to form an advanced oxidation system, and is suitable for degradation treatment of organic wastewater such as printing and dyeing wastewater, pharmaceutical wastewater, food wastewater and raffinate.

The invention provides a comprehensive treatment method for gold-copper-containing smelting wastewater, and belongs to the technical field of wastewater treatment. The method comprises the following steps: adding reduced iron powder into the gold-containing copper smelting wastewater, and fully reacting to obtain an iron powder replacement turbid solution; a first pH value regulator is added into the iron powder replacement turbid solution, an oxidizing agent is added after the pH value is regulated, and an iron-removed turbid solution is obtained after full reaction; adding a flocculating agent into the iron-removed turbid liquid, fully flocculating, and carrying out solid-liquid separation to obtain iron-removed underflow and iron-removed overflow; carrying out filter pressing dehydration treatment on the iron-removed underflow to obtain gold-copper slag and filter pressing liquid; and mixing the iron-removed overflow and the press filtrate, adding a second pH value regulator, and fully reacting after regulating the pH value to obtain a neutralized turbid solution. By means of the mode, valuable substances are effectively recycled, meanwhile, harmful metal ions in the wastewater are prevented from affecting a production system or the ecological environment, hazardous waste is not generated in the whole process, and unification of environmental benefits and economic benefits is achieved.

The invention relates to the technical field of battery recovery, and particularly discloses a recovery method of a waste lithium ion battery negative electrode material and a lithium ion secondary battery. The recycling method comprises the following steps: discharging, disassembling and separating the waste lithium ion battery to obtain a waste shell, a waste positive electrode material, a waste negative electrode material and a waste diaphragm material; crushing and screening the waste negative electrode material to obtain waste negative electrode powder; the method comprises the following steps: mixing waste negative electrode powder with ammonium bifluoride, and roasting for a preset time at 100-500 DEG C in an inert gas atmosphere; carrying out water leaching treatment on the roasted product, and carrying out solid-liquid separation on the obtained slurry to obtain a first leaching solution and a regenerated negative electrode material; mixing the first leaching solution with a reducing agent, reacting, and carrying out solid-liquid separation to obtain a second leaching solution and copper slag; mixing the second leaching solution with alkali, reacting, and carrying out solid-liquid separation to obtain a third leaching solution and positive electrode precursor slag; and concentrating the third leachate to obtain recovered ammonium bifluoride. By implementing the method, green closed-loop recovery of all parts of materials can be realized, and the energy consumption is low.

The present invention relates to the field of sludge treatment technology, and more specifically, to a method for solidifying arsenic in high-arsenic sludge using clay and copper slag. The method involves drying the high-arsenic sludge at 105°C for 12 hours and grinding it to a particle size of less than 0.5 mm to obtain a dry material. The dry material is then mixed evenly with clay powder, copper slag, and coal powder. Water is then added, stirred at room temperature for a pre-reaction of 6 hours, and poured into a crucible to obtain a paste-like mixture A. The dry mixture A is then calcined at 850-900°C for 20-40 minutes under a protective atmosphere. The reaction product, after natural cooling, is then used as a roadbed material, for example. This method utilizes clay and copper slag calcination to treat high-arsenic sludge, resulting in low arsenic and other heavy metal leaching toxicity and excellent stability, while also fully utilizing metallurgical solid waste.

The invention provides a zinc-copper-nickel-copper smelting deslagging agent and a preparation method and a use method thereof. The zinc-copper-nickel-copper smelting deslagging agent comprises the following raw materials in percentage by mass: 5-15% of calcium fluoride, 20-30% of sodium carbonate, 5-15% of sodium fluoride, 10-20% of sodium hexafluoroaluminate and the balance of borax. Compared with the prior art, the zinc-copper-nickel-copper slag remover prepared by mixing the raw materials can effectively reduce impurities to be less than 0.14% of Fe, less than 0.005% of Pb and less than 0.003% of Si in the smelting process, the impurity components are obviously reduced, the number of times of component adjustment and unqualified sampling is reduced, impurities mixed in a casting blank are reduced, and finally the metal purity and the casting quality are improved. Meanwhile, loss of zinc and nickel is reduced to the maximum extent; and adverse effects on the zinc-copper-nickel alloy are avoided.

The invention discloses a method for preparing a NaFeO2 material and leaching copper, zinc and molybdenum from copper slag, and relates to the technical field of metallurgical solid waste resource utilization. The method comprises the following steps: grinding the copper slag, mixing the ground copper slag with a sodium salt, roasting the mixture in a muffle furnace at a proper temperature, and finally carrying out ultrasonic washing and filtering on the roasted product to obtain filter residues and filtrate; and drying filter residues to obtain a high-purity NaFeO2 material, and recovering valuable metals such as copper, zinc and molybdenum from filtrate. In the washing process, valuable metal elements copper, zinc and molybdenum in the copper slag are efficiently leached into the solution, the leaching rate reaches 96% or above, and synchronous recovery of the valuable elements is achieved; according to the method, the industrial waste residue copper slag is successfully converted into the NaFeO2 product with the high additional value, meanwhile, valuable metal is efficiently extracted, the method has the advantages of being simple in process, low in cost, high in recycling degree and environmentally friendly, a new way is opened up for high-value utilization of the copper slag, and the method has good industrial application prospects.

The invention relates to the technical field of industrial waste resource utilization, and discloses a method for preparing an alpha-Fe2O3 byproduct polysilicate aluminum ferric material through industrial waste collaboration.The method comprises the steps that copper slag and red mud are evenly mixed and ground, and a mixture A is obtained; adding waste alkali liquor into the mixture A to obtain a solid-liquid mixture B; carrying out alkalization roasting on the solid-liquid mixture B, then carrying out ultrasonic reaction and carrying out solid-liquid separation to obtain a solid precipitate C and a filtrate D; adding hydrogen peroxide into the solid precipitate C, and calcining to obtain a solid E; grinding the solid E, blending into ore pulp, and carrying out magnetic separation on the ore pulp to obtain alpha-Fe2O3 and mineral active micro powder F; and reacting the filtrate D under an acidic condition, and curing to finally obtain the polysilicate aluminum ferric material. According to the method, the copper slag, the red mud and the waste alkali liquor in the iron-containing solid waste are used as raw materials to replace pure chemical reagents to prepare the high-added-value material, the problems that the existing solid waste / liquid utilization rate is low, the disposal cost is high and the like are solved, and value-added utilization of the iron-containing solid waste and the waste alkali liquor is achieved.

The invention discloses a method for recycling zinc smelting tailings, which comprises the following steps of: sieving the dried zinc smelting tailings, classifying and sampling, leaching coarse fraction by hydrochloric acid to obtain a leaching solution I and lead chloride slag, mixing the leaching solution with fine fraction tailings, adjusting the pH value of the solution to be neutral to obtain neutralized slag and neutralized liquid, and recycling the neutralized slag and the neutralized liquid. The neutralized liquid is subjected to replacement to obtain replacement slag and a replacement liquid, the replacement liquid is subjected to iron removal purification electrodeposition casting to obtain a zinc ingot, the replacement slag is subjected to acid leaching again to obtain copper slag and a leaching solution, and the germanium-gallium-indium leaching solution is subjected to extraction and electrolytic refining to obtain germanium concentrate, metal gallium and metal indium; the lead chloride slag is leached through sulfuric acid to obtain lead sulfate slag, the lead sulfate slag is subjected to pyrogenic process lead smelting to recover lead metal, a leaching solution II is subjected to hydrochloric acid and sulfuric acid separation, and a sulfuric acid solution and a hydrochloric acid solution are obtained and can be recycled. The method is high in recovery rate and low in production cost, and the purposes of low-pollution, low-carbon and economical industrial production and rare and precious metal recycling are achieved.

The invention relates to a wet catalytic oxidation catalyst and a preparation method thereof. The preparation method comprises the following steps: mixing a composite activator solution containing alkali metal hydroxide and a hydrated sodium silicate solution with a dry mixture containing water-quenched blast furnace slag and metallurgical copper slag to form precursor slurry, wherein the weight ratio of the dry mixture to the composite activator solution is 3: 2-2: 1; dispersing a solid copper-based active component in the precursor slurry to form catalyst slurry, wherein the weight ratio of the copper-based active component to the precursor slurry is 2: 100 to 25: 100; the catalyst slurry is subjected to curing forming, acid pickling and drying, and the wet catalytic oxidation catalyst is obtained. The catalyst prepared by the invention not only effectively improves the catalytic degradation efficiency of a wet catalytic oxidation system on organic matters, but also can be conveniently recycled and reused, and the cost of wastewater treatment is remarkably reduced.

The invention discloses a method for recovering valuable metals by roasting waste coffee grounds and metallurgical waste residues, and relates to the crossing field of biofuel and environmental engineering, the metallurgical waste residues and the waste coffee grounds are respectively pretreated and then mixed according to a certain mass ratio to obtain a mixture, and then the mixture is roasted and cooled to obtain molten residues; and finally, the molten slag is subjected to magnetic separation, and valuable metal is obtained through recovery. According to the method, the valuable metal is recycled through collaborative roasting of the waste smelting slag and the waste coffee grounds in the metallurgical production industry, secondary recycling of the copper slag is achieved, and meanwhile the problems of open circuit at the tail end of the copper slag and organic pollution of the waste coffee grounds are solved. Rich organic matters in the waste coffee grounds are used as a utilization target, so that waste is turned into wealth, and a green low-carbon economic sustainable development road is opened up for treatment of the waste grounds and the waste coffee grounds in the metallurgical industry.

The invention belongs to the technical field of metallurgy, and relates to a method for comprehensively recovering valuable elements from nonferrous smelting waste acid, which comprises the following steps: S1, mixing the waste acid with pyrrhotite, reacting in a sulfur dioxide atmosphere, and after the reaction, carrying out solid-liquid separation to obtain copper slag and copper removal liquid; and S2, H2S gas is introduced into the copper removal liquid obtained in the step S1, and after reaction, arsenic sulfide slag and arsenic removal liquid are obtained through solid-liquid separation. According to the method, FeS in the pyrrhotite selectively reacts with CuSO4 in the waste acid to generate indissolvable copper sulphide precipitates, meanwhile, under the protection of the sulfur dioxide atmosphere, the arsenic element in the waste acid is kept in a dissolved state and does not precipitate, the copper and arsenic elements in the waste acid can be effectively separated through the synergistic effect of the FeS and the CuSO4, and the separation steps are simple and efficient.

The invention relates to the technical field of building structure construction, and provides a prefabricated assembly type copper slag steel pipe concrete-H-shaped steel beam column joint. Comprising a copper slag steel pipe concrete column, an annular hoop piece, a lower column prefabricated upper end plate, a connecting device, an upper column prefabricated lower end plate, a first L-shaped steel plate, a second L-shaped steel plate, a bolt fastening piece, a convex sliding rail, an L-shaped steel groove, an H-shaped steel beam and special-shaped I-shaped steel. The lower column prefabricated upper end plate is arranged on the lower side of the copper slag concrete-filled steel tubular column, and the upper column prefabricated lower end plate is arranged on the upper side of the copper slag concrete-filled steel tubular column. According to the H-shaped steel beam column joint, connecting, splicing and positioning and placing of the concrete-filled steel tubular column and the H-shaped steel beam column joint can be more concise and convenient, on-site construction steps are saved, and the complexity degree is reduced; the construction method has the advantages that the construction cost is reduced, the construction efficiency is improved, the bearing capacity and durability of the joint can be effectively improved through beam-column joint connection, and good engineering application prospects are achieved.

The invention discloses a multi-component magnesium refractory aggregate using copper slag flotation tailings as raw materials and a preparation method thereof, the multi-component magnesium refractory aggregate is obtained by using copper slag flotation tailings powder, light-burned MgO powder, magnesite powder and alpha-Al2O3 powder as raw materials through compression molding and calcination. The preparation method comprises the following steps: mixing the copper slag flotation tailing powder, the light-burned MgO powder, the magnesite powder and the alpha-Al2O3 powder in a mixer to obtain mixed powder; adding a binding agent solution into the mixed powder, and performing mechanical pressing to obtain a green body; and heating the formed green body to 950-1150 DEG C, preserving heat for 4-6 hours, finally heating to 1480-1580 DEG C, preserving heat for 4-6 hours, cooling, crushing, and screening to obtain the multi-component magnesium refractory aggregate. According to the method, the copper slag flotation tailing powder is used as the raw material, resource utilization of the copper slag flotation tailings is achieved, and the obtained multi-component magnesium refractory aggregate is suitable for a cement rotary kiln.

The invention relates to the technical field of hydrometallurgy, and provides a method for separating and enriching iron and zinc by activating and roasting copper slag, which comprises the following steps: activating and roasting a mixture containing copper slag, a reducing agent and a dissociation agent at 700-1000 DEG C to obtain roasted sand; mixing the roasted product with an acid solution to obtain ore pulp with the pH value of 2.5-4 and the mass concentration of 15-25%, and carrying out ball-milling leaching and solid-liquid separation on the ore pulp under the condition that the ball-to-material ratio is (3-6): 1 to obtain iron-containing filter residues and zinc-containing filtrate. According to the method, the zinc leaching rate is remarkably increased, efficient separation of iron and zinc is achieved, namely, high-value recovery of iron and full recovery of zinc are achieved at the same time, and the technical problems that in an existing copper slag recovery process, metal such as iron and zinc is difficult to separate, the process temperature is high, and energy consumption is high are effectively solved.

The invention relates to the field of building materials, and particularly discloses a high-ductility cement-based composition with wave-absorbing performance and a preparation method thereof, the high-ductility cement-based composition comprises the following raw materials: cement, sand, water, copper slag, a ferrite-copper slag compound, fly ash, mineral powder, an additive, modified carbon fiber loaded with mica powder-modified waste rubber powder composite filler, and PE fiber; the ferrite-copper slag compound is prepared by mixing iron-containing electroplating sludge and iron salt, adding water to form slurry, adding copper slag and calcium oxide into the slurry, performing high-temperature oxidation treatment in an air atmosphere, and crushing; the preparation method comprises the following steps: mixing the cement, the sand, the copper slag, the ferrite-copper slag compound, the fly ash and the mineral powder, adding the modified carbon fiber loaded with the mica powder-modified waste rubber powder composite filler and the PE fiber, and stirring to prepare a primary mixture; and mixing the admixture with water, adding the primary mixture, and stirring to obtain the concrete. The preparation method has the characteristic of preparing the cement-based material with high ductility and wave-absorbing property.

The utility model belongs to the technical field of nonferrous metallurgy, and particularly relates to a slag salvaging device special for a tellurium and copper removal pot, which comprises a digging spoon and a telescopic rod, the digging spoon is fixedly connected with the telescopic rod, the digging spoon comprises a spoon head and a spoon handle, one side of the spoon head is fixedly connected with the spoon handle, one side of the spoon head, opposite to the spoon handle, is provided with digging teeth, and the telescopic rod is fixedly connected with the digging teeth. A bushing structure is arranged at the bottom of the spoon head and comprises a first bushing and a second bushing, the second bushing is horizontally arranged, an obtuse angle is formed between the first bushing and the second bushing, the digging teeth are correspondingly arranged above the first bushing, a worker pulls tellurium slag and copper slag in a boiler through the digging teeth, and the tellurium slag and the copper slag are gathered and then fished out. The first leakage plate and the second leakage plate which are arranged at the bottom of the spoon head are used for filtering tellurium slag and copper slag liquid, the first leakage plate is fixed through screws, the second leakage plate is fixed in an inserted connection mode, replacement is convenient, and the first telescopic rod and the second telescopic rod are fixed through the fixing assembly in a threaded connection mode.