Chemical and electrolytic recovery methods for extracting gold and other valuable metals

The present art relates to liquid metal back to a method of recovering the extraction of gold and electroless chemical plating process from scrap articles, first formulated with a gold back into the chemical solution, the amount of gold plating waste items into a high temperature gold complex manipulation In the liquid, the gold-containing liquid is diluted and heated, placed in a DC electrolytic cell to conduct electricity and control the current density, so that gold is deposited on the stainless steel cathode plate, then scraped, and then washed with acid, and then dried to obtain gold. . The process is simple, the cost is low, the raw materials are saved, there is no environmental pollution, the recovery rate is high, and the purity is good.

Extraction of Magnesium from Boron Mud by Silicon Thermal Method

A method for extracting metal from magnesium, boron mud, limestone, fluorite slagging agents, the reducing agent is silicon iron, boron, cement and limestone calcined first and then uniformly mixing the raw material after pulverization, pressed into briquettes, the The reduction reaction is carried out in a vacuum reduction tank to obtain magnesium metal vapor at the outlet of the reduction tank, and after condensation, crystalline magnesium metal is obtained. The method can reduce the magnesium in the boron mud by 60%, and the purity can reach 99%. The reducing slag produced by the reduction of the boron mud by the method can be used to make the brick without burning, and completely solves the problem of polluting the environment of the boron mud waste.

Wet metallurgy method for extracting metal lead from materials containing lead oxide and/or metal lead

A method for extracting metallic lead from a material containing lead dioxide and/or metal lead, the method comprising: a step of dissolving lead in the material, and an electrolysis of depositing dissolved lead to the cathode a step of dissolving the solution with an acidic electrolyte, a redox pair present in the acidic electrolyte, which is capable of making lead dioxide due to its potential energy between the oxidized and reduced chemical states The lead is oxidized and/or oxidized, and it can be regenerated during the lead electrochemical deposition step. This method is particularly useful for extracting lead from active materials of waste lead collection.

The method of extraction of germanium from brown coal

The present technology is a method for extracting cerium from lignite, including a pyrometallurgical process and a wet smelting process, wherein the wet process includes two processes of chlorination distillation and hydrolysis. The method is characterized in that the process of the fire method is sieving, coal-making rod or briquettes with strontium-containing coal, and then added to the chain furnace for smelting, the smog-containing soot generated in the furnace is composed of a cyclone collecting device, a bag dust collector and a foam dust collector. After recovery, the obtained antimony concentrate is again subjected to wet extraction. The technology has the following requirements: low raw material grade and calorific value; good enrichment effect, high recovery rate of base metal; saving manpower and material resources, reducing production cost of the product, less impurity and good quality; suitable for modern large-scale industry Production and other characteristics.

Method for extracting metal palladium

The present technology discloses a method for extracting metal palladium. The present technology can be used for smelting of palladium and also for extracting palladium from nuclear waste liquid. This technique is added to the solution containing palladium in an inert solvent and an alkali metal iodide, or a crown ether and then added with the palladium compound with an alkali metal iodide, palladium iodine reaction, was collected in an inert solvent and crown ether solution The metal palladium can be obtained by a conventional method of the prior art.

Roasting a cyanide salt from the copper-containing gold concentrate comprehensive recovery of gold, silver, copper

A new process for comprehensive recovery of gold, silver and copper from copper-bearing gold concentrate by salt-cooking-cyanation method was proposed. The process comprises adding a certain amount of salt (NaCl) to the copper-bearing gold concentrate, culturing at 650 ° C, leaching copper with dilute sulfuric acid, and preparing the sulfuric acid leaching residue in a sodium carbonate medium having a pH of 10 The cyanidation method extracts Au and Ag. Since the AgCl formed during the calcination is easily leached by the cyanide solution, the leaching rate of Ag is greatly improved. The method has simple operation, does not increase equipment, and better solves the problem of low silver recovery rate, and has excellent economic and social benefits.

Method for extracting gold from refractory gold concentrate

The present technology relates to a method for extracting gold from a refractory gold concentrate, and to a method for wet leaching gold extraction. The method is characterized in that the gold concentrate is leached with a sodium hydroxide solution under the conditions of heating, pressurization and oxygen addition, and the gold-containing leaching solution is formed, cooled and filtered, and then the sponge gold is directly prepared by a conventional metal replacement method. The environmental pollution is small, the requirements for equipment are low, the two processes of pre-oxidation reduction and gold leaching are combined, and the non-cyanide leaching of gold is realized, which is an ideal method for extracting gold from refractory gold concentrate.

Process for extracting fine bismuth from bismuth polymetallic ore

A process for extracting fine bismuth from a bismuth polymetallic ore, comprising leaching ore with hydrochloric acid, the leaching solution is reduced with sulfur dioxide gas and precipitating coarse mash, and the crude cerium powder is reacted with an oxidizing agent in a hydrochloric acid solution to obtain an intermediate product TeO ₂ , The finely divided product is then electrolyzed. The oxidant used in the hydrochloric acid leaching process and the reduction process includes a mixture of one or more of MnO ₂ , HNO ₃ , KClO ₃ , NaClO ₃ , and KMnO ₄ , the process is simple, easy to operate, no special equipment demand, and low cost. Suitable for industrial scale production.

Method and application for separating zinc , copper, cadmium and lead metallurgical materials by wet method

The invention relates to a method for separating zinc, copper, cadmium and lead metallurgical materials by wet method, characterized in that the metallurgical material is oxidized and leached, complex replacement, copper cadmium separation and zinc separation process will be useful metals Zinc, copper, cadmium, and lead are separated from the non-ferrous metallurgical materials, respectively. The oxidizing leaching agent used in the method is a mixture of ammonium persulfate and ammonia. The method can also be directly used for the mixed sulfide ore of zinc, copper and lead after calcination. The method can not only improve the extraction recovery rate of the metal, but also reduce the environmental pollution of the metallurgical waste residue.

New process for electrolytic anode mud treatment

A new process of electrolytic anode mud treatment, a new process of wet extraction of non-ferrous metals, using a wet process of sulfuric acid system to separate arsenic , copper, antimony , bismuth and silver in electrolytic anode mud. The arsenic copper is introduced into the leaching liquid, and the ruthenium is converted into an oxide which is easy to be bonded to the prior art, and the lead is converted into lead sulfate, and the silver is converted into silver chloride into the leaching slag. The leaching solution is replaced by iron to obtain arsenic copper slag (no arsine is produced) and the replacement liquid. After the replacement, the liquid is cooled and crystallized to obtain ferrous sulfate, and the mother liquid is returned to the oxidative leaching. The comprehensive recovery rate of the metal is high, the treatment cost is low, and the pollution is Corrosion is small.

Waste battery processing method

The present technology provides a waste battery treatment method, firstly breaking the used battery, removing the solid matter such as plastic and metal, and then dissolving it in water, extracting cadmium by electrolysis from the solution, separating the mercury by oxidative adhesion method, and then drying. The residue is obtained by the treatment, the residue is calcined and the metal oxide is reduced by the reducing agent, and the various metals are separated and recovered, thereby reducing the treatment cost and the emission of harmful gases, and can be used for comprehensive treatment of various batteries.

Method for extracting gallium from gallium-containing minerals

The technology is a method for extracting gallium from gallium-containing minerals. This technical result of containing aluminum oxide mineral was added bauxite and the like, as an extractant gallium by aluminum and gallium cognate similar nature gallium extracted into the aluminum, re-use the prior art separate aluminum and silicon, and then separated aluminum And gallium, respectively, to extract aluminum and gallium, therefore, the technology makes full use of existing aluminum smelting, galvanizing equipment and technology, reducing technical difficulty and production investment costs, making it easy to achieve industrial production; The simultaneous smelting of aluminum and smelting of gallium also reduces production costs and is conducive to improving the competitiveness of enterprises. The technology is a convenient and practical method for extracting gallium from gallium-containing minerals with effective, economic and social benefits. It can be used as a method for extracting gallium from various gallium-containing minerals, or as a smelting step for continuous smelting of gallium-containing and multi-metal minerals.

Method for extracting sputum , sputum and sputum

The technology relates to the extraction and refining of precious metals in the metallurgical field, using zinc and aluminum alloy crushed materials, pyrometallurgical crucible, steaming residue sodium hydroxide alkali leaching and ethanol from the leaching solution; it reduces the amount of the reducing agent; The distillation process does not consume oxidizing reagents; the separation effect of lanthanum and cerium is good, and the cerium is enriched and extracted after alkali fusion; its comprehensive cost is lower than other methods; it is suitable for the treatment of strontium, antimony, antimony and other precious metals. Wangshui insolubles and materials containing antimony.

Method for extracting nickel from copper-containing low nickel sulfide material

A method for extracting nickel from a copper-containing low-nickel sulfide material, relating to a nickel concentrate produced from a nickel concentrate, particularly a pressurized leaching from a copper-containing low or slow-cooling high-sulfur mill A method of extracting nickel. It is characterized in that the nickel concentrate is subjected to pressure leaching at 100-180 ° C and an oxygen partial pressure of 50-300 KPa under oxygen, sulfur or sulfuric acid. The process of the present technology requires only a period of pressure leaching, i.e., the process of leaching nickel, cobalt and copper, and the iron is solidified in the slag in the form of iron oxide. The nickel sulfate solution after liquid-solid separation can be used to produce pure nickel sulfate or electrolytic nickel while recovering valuable metals such as cobalt and copper. The process is simple and the production efficiency is high.

Process method for further gold extraction by cyanide gold extraction waste residue

The invention relates to a process method for refining gold by using cyanide gold extraction waste residue, relating to a metallurgical technology and a process method thereof. The technology is characterized in that the cyanide gold-removing waste residue is used as a raw material, and the gold-coated minerals in the waste residue are leached by catalytic oxidation, and then the gold is extracted by ordinary cyanide gold extraction method. The process method is simple, and the extraction rate of gold can reach more than 90%. The technology can not only obtain valuable gold, turn waste into treasure, but also reduce the environmental hazard of cyanide gold extraction waste residue.

Extracted and isolated from the rare earth minerals and non-cerium rare earths of cerium chloride plus carbon method

The present technology is a carbon-added chlorination process for extracting rare earth elements from rare earth minerals and effectively separating various rare earth elements; and consisting of four technical operations to realize the chemical metallurgical purpose of extracting and separating rare earth elements; The technical work is: 1. Low temperature plus carbon chlorination and addition of defluorination agent, selective chlorination and effective separation of non-rare earth elements such as fluorine, phosphorus and iron from the mineral; Separation of radioactive elements in rare earth minerals by high temperature chlorination-chemical vapor transport and water dissolution, respectively, followed by oxygen-enriched wet air oxidation and water-soluble method to separate the alkaline earth metal elements in the mineral; Separating lanthanum and non-cerium rare earth elements by dilute acid leaching; Each non-rhenium rare earth element is separated by chemical vapor transport. The invention is suitable for extracting and separating rare earth elements from various fluorine-containing or non-fluorine-containing rare earth minerals and rare earth industrial wastes, and comprehensively utilizing valuable components thereof and preventing radioactive pollution.

Method for extracting zinc from zinc-containing sulfide mineral

A method for extracting zinc from a zinc-containing sulfide mineral, relating to a hydrometallurgical process for extracting zinc from a zinc-containing sulfide mineral, a lead/zinc mixed mineral, or a zinc concentrate. The invention is characterized in that the zinc-containing sulfide mineral is subjected to pressure leaching in the presence of oxygen and sulfuric acid; the process and conditions are that the leaching mineral particle size is 90% or more and less than 50 μm; the liquid-solid ratio is 1-8:1, and the initial leaching The sulfuric acid concentration is 50 g / 1 to 200 g / l; the total leaching pressure is 200 KPa - 1000 KPa, the oxygen partial pressure is 100 KPa - 800 KPa, and the temperature is 100 ° C - 130 ° C. The method is characterized by low leaching temperature and good selectivity, and most of the iron is inhibited in the slag. The problem of encapsulation of sulfur on the mineral surface is avoided, and harmful impurities such as arsenic are solidified in the arsenic iron slag, which is an environmentally friendly process.

Method for preparing high-purity gold by electrolyzing gold-containing organic phase

The present technology relates to a method for preparing high purity gold by electrolysis gold-containing extraction of an organic phase. Specifically, it is an electrolytic solution containing two phases of an organic phase containing gold and an aqueous solution containing an electrolyte to prepare high-purity gold, and the usual steps of deposition and purification such as stripping and reduction are omitted. The technology improves the quality and recovery rate of the obtained gold, reduces the production cost, and provides a theoretical and practical basis for improving or simplifying the industrialization of the process of extracting gold by cyanidation and extraction. The gold deposition rate prepared according to the present technology is >95%, and the obtained gold purity is >95%, which can greatly reduce the production cost. It can be widely used in the technical field of preparing high purity gold.

Vacuum distillation device for recycling used batteries

A vacuum distillation device for recycling used batteries, relating to a waste battery recycling treatment device. The utility model is characterized in that the tubular vacuum chamber is divided into a distillation section and a condensation section, a high-temperature heating device is arranged in the distillation section, a condensation heating section is provided with a multi-zone segmentally controlled low-temperature heating device, and a tube which can slide along the entire vacuum chamber is arranged in the vacuum chamber. Condenser. The inner surface of the tubular condenser is a roughened inner surface. A sieve is placed at the outlet of the vacuum chamber. The device can selectively recycle materials of different melting points and can process different types of used batteries with the same set of equipment. The device can extract and recover valuable metal elements in the waste battery in a state of pure metal, and has high recovery rate of materials, high purity of products, little impact on the environment, and no secondary pollution.

Process for producing CuSO ₄ .5H ₂ O by copper oxide ore wet process

The present technology relates to a process for producing CuSO ₄ ·5H ₂ O using a copper oxide ore wet process. Without complex processes such as ore flotation, high temperature smelting, electrolysis, etc., the copper oxide ore is crushed and ball milled, and then directly diluted with H ₂ SO ₄ . The material liquid is clarified and filtered, analyzed by analysis or directly concentrated and centrifuged. Drying CuSO ₄ ·5H ₂ O; or placing the filtrate in a replacement tank to replace the sponge copper with Fe(Zn), and then calcining the fired sponge copper with a dilute H ₂ SO ₄ hot solution to make CuSO4 The mother liquor is finally concentrated, crystallized and dried to obtain CuSO ₄ ·H ₂ O blue crystals. In the process of the process, the residue after the chemical is repeatedly immersed in water for the extraction of precious metals, the immersion liquid is returned to the chemical, and the centrifuged CuSO ₄ mother liquid is further introduced into the concentration process, the whole process is simple, easy to operate, and the product quality In line with the national standard, the investment is small, the benefit is high, and the environment is not polluted. The development and utilization of low-grade copper oxide ore has broadened the prospects. 

Process and device for recovering metal oxide

The present technology relates to a process for recovering a metal oxide from a metal-containing metal salt in a dissolved state and preferably also extracting or recovering an acid, the process comprising jet-baking a solution, the main feature of which is that the jet roasting is carried out. At least two stages, at least one evaporation stage and at least one conversion stage thereafter. Additionally, the present technology relates to apparatus for performing this process.
Granulation process suitable for bioleaching leaching of metals

The technology relates to a granulation process of powder ore, in particular to a granulation process for extracting metals by bioleaching. The method comprises the following steps: (1) preparing materials: mixing the sulphide ore powder used for extracting metal from the bio- heap leaching with a binder, the binder being an organic binder or an inorganic binder or an organic binder and an inorganic binder a mixture of binders. (2) Granulation: The material in (1) is granulated in a pelletizer, and the particle size of the finished ball is 5 to 25 mm. (3) Maintenance: The top cover is breathable, so that it is naturally dry and gets a dry ball. The process is simple, the binder used is easy to obtain, and has no effect on the bio-soaking performance of the pellets. The pellets have sufficient strength to allow the pile to have good permeability and to ensure that it does not collapse or collapse.

By the method for producing titanium-rich titanium ore materials

The present technology discloses a method for producing a titanium-rich material by using titanium ore resources, and the present technology can effectively recycle various valuable elements in the surface of the vanadium- titanium magnetite ore, the off-balanced ore and the weathered ore. The technical scheme of the present technology is: the vanadium-titanium magnetite is subjected to pre-selected tailing or weathering ore washing, and then subjected to magnetization roasting stage to select the gangue mineral to separate the ilmenite concentrate, or the ilmenite concentrate and vanadium-titanium. After the iron concentrate is mixed in a certain proportion, it is mixed with binder and carbonaceous reducing agent, and then pelletized for pre-reduction or directly into the furnace. High-titanium slag and semi-steel and alloy are produced by smelting in electric blast furnace or submerged arc furnace. The molten iron is blown by vanadium and chromium by the double method, and the obtained steel slag containing vanadium and chromium is separated by wet extraction to separate vanadium chromium, and the high titanium slag enters the pyrometallurgical beneficiation process of the titanium slag to produce artificial rutile and glass ceramics. The artificial rutile titanium-rich material and the fine coal mill are mixed in a certain proportion and then added with a binder to prepare carbon-containing titanium particles. After being calcined and cooled in the baking furnace, the sieve is classified into a grade-containing carbon-containing rutile of +0.3 mm to -1.4 mm. Titanium-rich material. 

Process for thermally reducing and extracting metal calcium

The present technology proposes a process for thermally reducing and extracting metallic calcium, which is carried out in turn according to the steps of preparation, ball milling, batching, pelletizing, thermal reduction and desublimation. Using the strong reduction characteristics of aluminum powder, the thermal reduction reaction is carried out in a specific vacuum reduction tank, and the reduced gaseous calcium is absorbed into the metal calcium ingot by a crystallizing box wound with a cooling tube, and the industrial waste residue after the thermal reduction reaction is available. As a raw material for the production of cement, no waste gas or waste residue is discharged, and it does not pollute the ecological environment. The technology has the advantages of simple process, scientific and reasonable, simple equipment, easy operation, convenient maintenance and management, safe and stable production operation, low production cost, and the like, and has obvious economic benefits and social ecological environmental effects.

30mm Dovetail Scope Rings

30mm Dovetail Scope Rings are a specific type of dovetail mounting system designed to accommodate rifle scopes with a 30mm main tube diameter. These rings feature a dovetail design that slides into a corresponding dovetail-shaped groove on the firearm's receiver or rail system. The 30mm measurement refers to the internal diameter of the scope rings, which is the size of the scope tube they are designed to hold securely.