262 results about "Iron copper" patented technology

The invention discloses a water treatment method of zero-valent iron-copper bi-metal activated persulfate. The water treatment method specifically comprises the steps that bi-metals including zero-valent iron and copper are added into water containing micro-pollutants, then persulfate is added, full mixing is performed, the bi-metals including the zero-valent iron and the copper are utilized to activate the persulfate so as to remove the micro-pollutants in the water. The water treatment method utilizes the bi-metals including the zero-valent iron and the copper to efficiently activate the persulfate so as to produce free sulfate radicals having strong oxidizing property, can achieve the purpose of quickly and thoroughly removing micro-pollutants, including multiple types of poisonous and harmful micro-pollutants in water, such as polychlorinated biphenyl, brominated flame retardants, drugs and personal care products (PPCPs) and algal toxin, and has the advantages of high activation efficiency, high oxidation and degradation efficiency of pollutants, wide pH using range, convenient operation and the like. The water treatment method can be applied to underground water remediation, treatment of industrial water (including electroplating wastewater, hospital wastewater, printing and dyeing wastewater and the like), drinking water treatment, wastewater treatment and the like.

The invention relates to the technical field of powder metallurgy, in particular to water atomization ferrum-copper alloy powder and a manufacturing method, which are used for improving dimensional precision of powder metallurgy parts. Chemical components of the water atomization iron-copper alloy powder include 0-0.1% of C (carbon), 0-0.3% of Si (silicon), 0.05-0.5% of Mn (manganese), 0-0.05% of P (phosphorus), 0-0.05% of S (sulfur), 5-45% of Cu (copper) and the rest ferrum. The manufacturing method includes the steps of smelting, water atomization, drying, reduction and crushing. The powder serves as a copper additive for a series of copper-containing powder metallurgy parts with Fe-Cu-C, Fe-Ni(nickel)-Mo(molybdenum)-Cu-C and the like, has sintered dimensional change stability better than that of electrolytic copper powder, and is beneficial to controlling dimensional precision of sintered parts.

Disclosed is a manufacturing process of a sintered iron-copper base porous alloy and of an oil-impregnated sintered bearings, having the steps of: preparing a mixed powder comprising an iron powder, and at least one of a copper powder and a copper alloy powder; forming the mixed powder into a green compact; and sintering the green compact to obtain a sintered iron-copper base porous alloy. The iron powder contains a porous iron powder which has a particle size of 177 microns or less and a specific surface area of 110 to 500 m²/kg according to a gas adsorption method. The sintered compact has high intercommunicating porosity and low permeability, and it is sized to prepare the sintered bearing into which a lubricating oil is impregnated.

The invention relates to superfine iron-copper alloy powder and a preparation method thereof. The superfine iron-copper alloy powder is prepared by using ferric oxalate powder at an industrial raw material stage and cupric oxide powder at an industrial raw material stage as raw materials through high-energy ball milling and hydrogen reduction and has a fisher particle size smaller than 1.0 microns and a oxygen content smaller than or equal to 0.5 percent by weight. The invention has the advantages that grains of the superfine iron-copper alloy powder are thinner, the physical and chemical properties are superior, and the manufacture cost is low.

The invention relates to a method for sorting high-pelitic and high-iron copper oxide ore hard to treat, and belongs to the technical field of mineral processing. After being ground, raw copper oxide ore is subjected to rapid flotation, so that a high-grade copper concentrate is obtained; then copper minerals hard to float are separated out through segmented flotation, and a low-grade copper concentrate is obtained; and finally a magnetic concentrate is obtained through high-gradient magnetic separation. Compared with a traditional copper oxide flotation method, the recovery rate of the method is higher by 15%-35%, and interference of mud and iron is avoided. The technological process is stable, high in adaptability, low in production cost, high in copper recovery rate and capable of being industrially implemented.

A kind of preparation method of microspherical Fischer-Tropsch synthesis catalyst, mix ferric nitrate or ferric sulfate solution with lanthanum nitrate and copper nitrate or copper sulfate mixed solution, then add precipitating agent sodium carbonate or ammonia solution, the obtained iron-containing lanthanum copper After the precipitation slurry is washed and filtered to obtain a co-precipitation filter cake, the potassium silicate water glass solution is directly added to the wet slurry containing iron, lanthanum and copper, and the slurry is beaten and mixed evenly to obtain a catalyst slurry, which is then spray-dried and roasted to obtain a catalyst slurry. Spherical slurry bed Fischer-Tropsch synthesis iron-based catalyst. The invention simplifies the technological process, and the spray drying method has the characteristics of large processing capacity, low energy consumption, rapid catalyst formation, suitable for industrial continuous large-scale production and the like.

The invention relates to a high strength self-lubricating iron-copper powder composite material, a preparation method and application thereof. The composite material is characterized by comprising an iron alloy base body and a copper alloy base body as a surface layer, wherein the iron alloy base body contains Cu, C, Sn, Pb and Fe, and the copper alloy base body contains Ni, C, MoS2, Sn, Fe, Pb and Cu. The preparation method comprises the following steps of: respectively preparing copper alloy layer warm-pressing powder and iron alloy base body warm-pressing powder; filling the warm-pressing powder into a mould and then pressing once to form a green compact; sintering the green compact in the protection atmosphere; and shaping the sintered sintering compact in the mould so that the composite material is prepared. By the invention, the cost of parts can be greatly reduced on the basis of ensuring the use performance of the parts.

The invention relates to a wastewater treatment process of an iron-copper-sulfur polymetallic mine slurry detention reservoir. The step includes the steps of 1,water intaking from the slurry detention reservoir, wherein wastewater can enter a slurry pool through a dirt leading pipe; 2, pretreatment, wherein impurities and sand particles are removed, homogeneity and averaged quantity are achieved, and meanwhile an oxidizing agent is fed to remove reducing substances; 3, preliminary physicochemical treatment, wherein a conditioning agent, coagulant, a heavy metal ion capturing agent and a flocculating agent are added, 4, secondary physicochemical treatment, wherein the conditioning agent, the coagulant, the heavy metal ion capturing agent and the flocculating agent are added, the PH value of wastewater is adjusted to 6.0-11.0, and zinc ions and various remaining metal ions are removed; 5, pH back conditioning; 6, slurry treatment, wherein slurry is dehydrated with a screw pump to form a dry filter cake. By means of the wastewater treatment process, the phenomenon of re-dissolution of heavy metal ions can be avoided; the treatment cost is low, less slurry is generated, and the situation of secondary pollution is avoided.

The invention discloses a comprehensive treatment method for mixed waste residues. The comprehensive treatment method comprises the following steps that (1) the mixed waste residues are mixed with reducing agent coke for reduction smelting to obtain iron-copper alloy, lead-zinc smoke dust and secondary smelted slag; (2) lead-free cathode ray tube (CRT) glass, quartz sand and an additional agent are added for glass ceramic smelting according to components of the secondary smelted slag, and obtained molten glass microcrystalline phase is subjected to water quenching granulation to obtain glass ceramic particles; and (3) the obtained glass ceramic particles are subjected to pressing plate molding forming, formed materials are subjected to nucleation and crystallization treatment to obtain glass ceramic plates with good performance. The mixed waste residues are treated through a two-step high-temperature smelting method, valuable metal in the residues can be effectively recycled and enriched, and the technical process is simple. Meanwhile, the follow-up preparation of the glass ceramic plates is combined, so that economic profits are achieved.

The invention relates to a method for recovering copper and nickel from nickel-iron-copper alloy waste, belonging to the technical field of resource comprehensive utilization. The method comprises the following steps: oxidation for iron removal: heating the nickel-iron-copper alloy waste to obtain molten-state nickel-iron-copper alloy waste, then adding a slag former, and spraying oxidation gas to obtain molten metal and slag; first-stage electrolytic refining to recover copper: casting the obtained molten metal into a soluble anode, and then electrolyzing by taking a soluble anode plate as an anode, a stainless steel plate as a cathode and copper sulfate as electrolyte to obtain copper on the cathode; second-stage electrolytic refining to recover nickel: heating the electrolyte after the electrolytic refining to remove iron and copper and then feeding into a nickel electrolytic tank as the electrolyte for recovering nickel, and electrolyzing by taking an insoluble titanium plate as an anode and a stainless steel plate as a cathode to obtain nickel on the cathode. According to the method provided by the invention, the three processes of alloy structure damage, anode plate casting and oxidation for iron removal are coupled together, so that the energy saving effect of the process is remarkable.

The present invention relates to an iron-copper base catalyst synthesizing mixture of lower alcohols. In weight percentage, the iron-copper base catalyst consists of 20 percent to 60 percent of Cu, 15 percent to 60 percent of Fe, 0.4 percent to 20 percent of Mn, 0.4 percent to 30 percent of Zn and 0 percent to 5 percent of MA. The catalyst is prepared by a coprecipitation method. The iron-copper base catalyst has the advantages of simple preparation, easy operation, good reaction performance repeatability of the catalyst, realizing industrial amplification easily, good stability and high total alcohol selectivity.

The present invention relates to a polishing composition for silicon wafer comprising silica, a basic compound, a polyaminopolycarboxylic acid compound having hydroxy group, and water. The polishing composition can prevent metal contamination by nickel, chromium, iron, copper or the like, particularly copper contamination in polishing of silicon wafer.

The invention provides an iron-copper oxide/copper base electrode material and a preparation method thereof. The iron-copper oxide/copper base electrode material is expressed as Fe3O4/CuO/copper base.A copper hydroxide nanowire array, i.e. Cu(OH)2/copper base, is grown on the copper base in an in-situ way; then ferric hydroxide is electrodeposited on the Cu(OH)2/copper base in the electrolyte solution containing iron ions by using the method of potentiostatic electro-deposition so as to form the hollow tubular structure Fe(OH)3/Cu(OH)2/copper base; and then the ferric hydroxide is transformedinto ferric oxide and the copper hydroxide is transformed into copper oxide through high temperature roasting, and the hollow tubular structure is maintained so that the hollow tubular structure Fe3O4/CuO/copper base material is obtained. The material has great super capacitance performance and is suitable for being used as the supercapacitor electrode material.

The invention relates to a method for absorbing and purifying hydrogen sulfide with an EDTA (ethylene diamine tetraacetic acid) chelated iron copper compound system, which comprises the following steps: dissolving 1-10wt% of soluble iron salt in deionized water to prepare an iron salt solution; adding soluble copper salt and EDTA disodium salt into the iron salt solution in an iron salt/copper salt/EDTA disodium salt mass ratio of (1-5):1:1, thereby obtaining an EDTA chelated iron copper compound absorption solution; and introducing hydrogen sulfide gas with the concentration of 800-4000ppm to carry out absorption reaction. The method provided by the invention has the advantages of high removal efficiency, mild reaction conditions, low absorption solution cost, low raw material consumption, wide application range and the like, and is simple to operate.

The invention discloses an iron-copper composite oxide supported catalyst for room-temperature ozonolysis, particularly relates to an ozonolysis catalyst and a preparation method of the ozonolysis catalyst, and relates to the fields of catalysis and environmental protection. Honeycomb ceramics or multi-hole foam metal or activation carbon fiber cloth is used as a carrier of the catalyst, iron-copper composite oxide is a main active component, and gold is an auxiliary active component. The preparation method mainly comprises: A. Fe2O3-CuO composite oxide powder is prepared through the adoption of a precipitation method; B. the powder is dispersed in water, the PH value of the water is adjusted to be 7-8, HAuCl4 solution is dropped in the water, and the PH value of the water is again adjusted to be 7-8; C. the suspension liquid is heated to 30-50 DEG C, reacts for 1-3 hours, and is filtered, washed, dried and roasted to obtain a target product; and D. deionized water and silica gel which are provided with a fixed ratio are added to the catalyst to be processed into seriflux, the carrier of the catalyst is placed in the seriflux, soaked, taken out and then dried and roasted. The catalyst prepared by adopting the method is simple in process, low in cost, and high in catalytic activity and stability for ozonolysis in the indoor air.

The invention relates to an iron-copper-based powder alloy brake block and a preparation method thereof. The powder material is formed by adding 30-50% of copper powder, 30-50% of iron powder, 1-6% of tin powder, 1-8% of molybdenum powder, 1-10% of silicon carbide, 1-7% of lead powder, 1-6% of molybdenum disulphide and 5-20% of flaky graphite in weight ratio. Preprocessing, burdening, mixing, pressing, sintering, cooling and machining are carried out on the raw materials, so that a sector powder alloy friction piece is formed, and the friction piece is paired with heat-resisting alloy steel or wear-resisting cast iron to form a friction couple. The iron-copper-based powder alloy brake block is applicable to an airplane multi-disc type brake device or the brake and the clutch of a heavy duty vehicle.

The invention discloses a beneficiation process for refractory micro-fine particle-graded iron-copper ore. The beneficiation process for the refractory micro-fine particle-graded iron-copper ore comprises the following steps: (1) performing first flotation; (2) performing second flotation and first magnetic separation to obtain iron ore concentrate 1 and tailings 1; (3) performing third flotation and second magnetic separation to obtain copper ore concentrate 2 and tailings of the three times of flotation, and performing secondary magnetic separation on the tailings of the three times of flotation to obtain iron ore concentrate 2; (4) performing third magnetic separation and gravity separation to obtain iron ore concentrate 3, tailings 3, iron ore concentrate 4 and tailings 4; (5) performing combined beneficiation on the micro-fine particle-graded tailings: performing centrifuge roughing-table concentration on the tailings 4 obtained through the process to obtain iron ore concentrate 5 and tailings 5. The beneficiation process disclosed by the invention has the beneficial effects that during a separation process, stage grinding and stage separation are adopted, so that the over crushing phenomenon is not easy to occur on the iron ore concentrate, and the goals of early recovery and high recovery is achieved; copper and iron in the iron-copper ore are comprehensively recovered; moreover, during the utilization of tailings recovery, the recovery rate of the iron ore concentrate is improved by 10-20 percent; the beneficiation process for the refractory micro-fine particle-graded iron-copper ore has very good economic benefit.

The invention discloses iron-copper alloy powder and a preparation method thereof. The iron-copper alloy powder is prepared from the following raw materials in percentage by mass: 10-30 percent of copper oxide powder and 70-90 percent of iron-copper pre-alloyed powder. The preparation method comprises the following steps: selecting the copper oxide powder prepared through roasting and crushing, uniformly mixing the copper oxide powder and the iron-copper pre-alloyed powder according to a ratio, carrying out active diffusion sintering on the mixture in a reducing atmosphere, crushing and sieving the mixture subjected to sintering, and finally preparing the iron-copper alloy powder. The iron-copper alloy powder is lower in apparent density and good in formability, has the apparent density being 2.5-3.0g/cm<3> and the green strength being 12-15MPa, makes up for the deficiencies in the prior art and broadens the application market.

The present invention relates to a wastewater treatment method by ultrasonic reinforcement micron-scale iron-copper bimetallic particles, and belongs to the field of refractory wastewater treatment. The method includes the following process steps: adding the micron-scale iron-copper bimetallic particles to a reactor, then feeding wastewater to-be-treated continuously to the reactor and starting an ultrasonic probe, treating the wastewater by the micron-scale iron-copper bimetallic particles which are in a fluidized state with the action of ultrasonic, and continuously discharging the wastewater processed by the micron-scale iron-copper bimetallic particles from the reactor, wherein the retention time of the wastewater in the reactor is 0.2-1.0 h. The method not only improves the efficiency of wastewater treatment, but also can prevent the ultrasonic probe from cavitation corrosion and packing passivation compaction, and broadens the range of pH for the wastewater treatment.

The invention relates to a method for treating wastewater of caprolactam production. The method of the invention employs a technology combining oxidizing agent pretreatment, iron-copper micro-electrolysis pretreatment and a membrane bioreactor (MBR). The method first conducts pretreatment to remove part of COD (chemical oxygen demand) and biological toxic substances from ammoximation wastewater, and then mixes the treated ammoximation wastewater with the rest wastewater of caprolactam production for MBR biochemical treatment. A biochemical treatment unit in the MBR system adopts a granular biomembrane filling material. In a membrane separation unit, a pulsed gas-containing water flow drives the granular biomembrane filling material to clean membrane components continuously. The method of the invention not only improves the treating effect to wastewater of caprolactam production, but also enhances the operation effect and system stability of the membrane separation system, and reduces treatment cost.