124 results about "Zinc electrowinning" patented technology

The invention belongs to the field of wet metallurgy of zinc, and particularly relates to a synergistic leaching-copper arsenate removing method for leaching residues in high-iron zinc calcine and high-iron zinc sulfide concentrate. The method comprises the following steps: mixing the leaching residues in the high-iron zinc calcine with the high-iron zinc sulfide concentrate; mixing zinc electrowinning waste liquor and a part of sulfuric acid-containing solution prepared from concentrated sulfuric acid and synergistically leaching; adding a reaction dosage of industrial iron powder into a synergistically-leached copper arsenate-removing primary solution; replenishing a proper amount of copper sulfate as required; reacting; performing liquid-solid separation on reaction ore pulp to obtain cuprous arsenide precipitate serving as a copper-leaching raw material and a copper arsenate-removing secondary solution; returning the copper arsenate-removing secondary solution to a zinc hydrometallurgy process to further recover valuable metals therein. The method is clean and efficient, efficient leaching of copper and efficient reduction of Fe<3+> can be realized, the solution treatment amount is small, the comprehensive recovery rate of valuable metals in a zinc hydrometallurgy process is increased comprehensively, and the smelting flow is simplified.

The invention discloses a method of recycling zinc, manganese, lead and silver from zinc electrowinning anode mud. The method comprises the following steps of: after carrying out wet ball grinding on the zinc electrowinning anode mud, filtering, wherein filtrate is taken as a raw material for a zinc smelting system; mixing filter residues and acidic solution, adding a reducing agent to carry out reduction reaction, leaching manganese, filtering to obtain leaching liquid and leaching slag, purifying the leaching liquid, and preparing manganese dioxide through an electrolysis method; and recycling lead and silver with the leaching slag as high-lead slag and a raw material of a lead smelting system. The method, provided by the invention, has the characteristics of less investment, simple process, low cost, easiness in operation and the like; the whole process is a green metallurgical process flow, and is environmental-friendly, the comprehensive recovery and utilization efficiency of resources can be effectively improved, the battery-level manganese dioxide obtained by electrolysis is taken as a new energy material so as to be beneficial for environmental protection and high value-added utilization of resources. The method is easy to realize large-scale industrial application.

The invention discloses a cable sheath tube preparation method, and relates to the field of electricity facility. Raw materials of the cable sheath tube comprise, by weight, 80-90 parts of polyolefin, 2-5 parts of plant ash, 1-3 parts of gum, 0.5-0.8 parts of a silane coupling agent, 1-2 parts of stearic acid, 0.6-0.8 parts of white carbon black, and 3-5 parts of electrolytic zinc acid leaching residue. The cable sheath tube is prepared through the steps such as melt blending, crosslinking, granulation and molding. The tensile strength of the cable sheath tube is higher than 26 MPa. The breaking elongation of the cable sheath tube is higher than 750%. The oxygen index of the cable sheath tube is higher than 36. The flame retarding performance of the cable sheath tube reaches the A level. The cable sheath tube also has significant characteristics of high strength and high flame retarding performance. Also, plant ash and electrolytic zinc acid leaching residue are recycled, such that environment pollution is reduced, and production cost is reduced. The electric cable has significant economic and environmental benefits.

The present invention aims to provide a zinc electrowinning anode capable of inhibiting manganese compound deposition on the anode and a cobalt electrowinning anode capable of inhibiting cobalt oxyhydroxide deposition on the anode.The zinc electrowinning anode according to the present invention is a zinc electrowinning anode having an amorphous iridium oxide-containing catalytic layer formed on a conductive substrate, and the zinc electrowinning method according to the present invention is an electrowinning method using that electrowinning anode. Also, the cobalt electrowinning anode according to the present invention is an electrowinning anode having an amorphous iridium oxide or ruthenium oxide-containing catalytic layer formed on a conductive substrate, and the cobalt electrowinning method according to the present invention is an electrowinning method using that electrowinning anode.

The invention relates to a method and a smelting furnace for processing a high-iron multi-metal zinc concentrate. The method comprises the following steps of: adding the zinc concentrate which contains the following components in percentage by weight: 16%-24% of Fe, 0.02-0.40% of In, 0.2%-2.0% of Cu, 0.004%-0.04% of Ag and 36%-48% of Zn to the smelting furnace, successively carrying out three processes including oxygen-enriched oxidation smelting, weak reduction smelting and strong reduction smelting to product sulfur dioxide fume, a copper-silver alloy, smelting slag and zinc-indium smoke dust, wherein the sulfur dioxide fume is used for preparing sulfuric acid, the smelting slag is externally sold, the copper-silver alloy is separated to extract copper and silver, and the zinc-indium smoke dust is subjected to neutral leaching to obtain a neutral leaching solution and neutral leaching residues; producing electrolytic zinc through the neutral leaching solution according to a conventional process; carrying out two-stage acid counter current leaching on the neutral leaching residues to obtain a low-acid leaching solution and high-acid leaching residues; returning the high-acid leaching residues to the smelting furnace for smelting, producing fine indium by using the low-acid leaching solution according to a conventional P204 extraction process, and returning extraction raffinate to neutral leaching. The method disclosed by the invention has the advantages of short process flow, high production efficiency, low production cost, good integrated recovery and clean and environment-friendly production process.

The invention provides a process for ensuring zinc electrowinning safety driving in case of overproof copper mass through a forced low-temperature method. A refrigeration fan is arranged on an electrolytic bath, the temperature during driving is 20-22 DEG C, the acid-zinc ratio is adjusted to 1.8-2.0, and the total load of current is 30%-40%; when the time reaches 24h, the concentration of copper ions is reduced to 2.8-3.2mg / l and the total load of the current is 40%-50%; when the time reaches 48h, the concentration of the copper ions is reduced to below 2.0mg / l, the total load of the production current is 50%-70%, and the temperature of the bath is ensured to be 20-30 DEG C; and when the time reaches 72h, the concentration of the copper ions is reduced to below 0.3mg / l and the normal production is restored. The process disclosed by the invention adopts a forced cooling segmental operation method, safety driving can be realized when the copper ions in a zinc electrolysis circulation solution are 5.0-1.5mg / l in concentration, ablation of a plate by copper can be avoided, the new method can be popularized and applied to other zinc wet smelters to improve the range of applications of a copper content standard in a zinc electrolyte in factories and reduce the problems that waiting time for driving is too long and the like because of overhaul or temporary parking of the factories and workshops, the technical and economic benefits are obvious, and the process has actual application value in production.

The invention discloses a filling resin of an electrolytic zinc negative plate stripping mouth and a processing technology thereof. The filling resin is prepared by mixing component A and component B at a weight ratio of 2:1; the component A comprises bisphenol-F-epoxy resin, a epoxy resin diluent, a flexibilizer, silicon carbide filling material, a hydrolytic stabilizer and an adhesion promoter; and the component B comprises polyamide 650 curing agent, polysulfide rubber flexibilizer, mica and a color paste. Optimized selection and reasonable combination of raw materials with different performances, and a double-component mixing process are employed in the preparation of the filling resin, so that the filling resin is capable of solidifying quickly at room temperature, and possesses high bonding strength and peeling resistance after solidification, and also possesses excellent acid corrosion resistance, high temperature resistance, ageing resistance, and current shock resistance. The insulativity is high, cost is low, and storage requirements are few. The filling resin is easy to produce, is non-toxic, and is appropriate to be used as the filling resin of the electrolytic zinc negative plate stripping mouth.

The invention discloses an electric cable, and relates to the field of electricity facility. Raw materials of the sheath tube of the cable comprise, by weight, 85 parts of polyolefin, 3 parts of plant ash, 2 parts of gum, 0.6 parts of a silane coupling agent, 1.5 parts of stearic acid, 0.7 parts of white carbon black, and 4 parts of electrolytic zinc acid leaching residue. The tensile strength of the cable sheath tube is higher than 26 MPa. The breaking elongation of the cable sheath tube is higher than 750%. The oxygen index of the cable sheath tube is higher than 36. The flame retarding performance of the cable sheath tube reaches the A level. The cable sheath tube also has significant characteristics of high strength and high flame retarding performance. Also, plant ash and electrolytic zinc acid leaching residue are recycled, such that environment pollution is reduced, and production cost is reduced. The electric cable has significant economic and environmental benefits.

The present invention aims to provide a zinc electrowinning anode capable of inhibiting manganese compound deposition on the anode and a cobalt electrowinning anode capable of inhibiting cobalt oxyhydroxide deposition on the anode.The zinc electrowinning anode according to the present invention is a zinc electrowinning anode having an amorphous iridium oxide-containing catalytic layer formed on a conductive substrate, and the zinc electrowinning method according to the present invention is an electrowinning method using that electrowinning anode. Also, the cobalt electrowinning anode according to the present invention is an electrowinning anode having an amorphous iridium oxide or ruthenium oxide-containing catalytic layer formed on a conductive substrate, and the cobalt electrowinning method according to the present invention is an electrowinning method using that electrowinning anode.

A method for recovering valuable metals, such as lead, silver and gold from the residue of an electrolytic zinc process, wherein the residue from the zinc process is suspended and sulfidized for converting the lead and silver compounds into sulfidic form, and further flotated for forming a flotation concentrate that contains valuable metals, wherein the sulfidizing and flotation processes are controlled electrochemically, so that the content of the sulfide ions fed in the sulfidizing stage is adjusted by means of the redox potential to a level where the grain size of the created valuable metal sulfides is sufficient for flotating them, and that the redox potential of the flotation stage is adjusted to be within a range where the collector chemical is adhered to the mineral to be flotated, but the sulfides are not oxidized.