20 results about "Gold extraction" patented technology

The application discloses a kind of short process gold extraction devices of waste printed circuit board.It includes separation module, collection module and electrodeposition part.Separation module contains leaching tank, and leaching liquid and cleaning liquid are alternately introduced, and leaching process is strengthened using micro-bubble generator and heater, so that gold foil is stripped from the surface of circuit board;Collection module contains filter and temporary storage tank, for intercepting and collecting gold foil and classifying temporary storage liquid;Electrodeposition part is connected to temporary storage tank, and copper in leaching solution is recovered through electrodeposition tank, and tail liquid flows back to leaching tank to realize closed circuit circulation.The application adopts integrated design, and combines selective leaching and physical interception by micro-bubble strengthening, without complex high-temperature or cyanide equipment, and one step realizes efficient stripping of gold and electrolytic recovery of copper;At the same time, leaching solution is closed circuit, and cleaning liquid is recovered in stages, which significantly shortens the process flow, reduces equipment investment and environmental pollution.

This invention belongs to the field of wastewater treatment technology, and specifically relates to a device and method for treating wastewater from potassium gold cyanide production. The device includes a high-concentration wastewater treatment line, a low-concentration wastewater treatment line, and a PLC controller. The high-concentration wastewater treatment line includes a high-concentration wastewater pipeline, on which a high-concentration wastewater equalization tank and a filtration pretreatment component are sequentially installed. This invention provides dual-line separation treatment for high-concentration and low-concentration potassium gold cyanide production wastewater. The high-concentration wastewater undergoes electrolytic gold extraction to achieve efficient recovery of elemental gold and in-situ pre-cyanide removal. The low-concentration wastewater and the high-concentration wastewater after gold extraction undergo resin adsorption for specific recovery of trace amounts of gold and breaking down the gold-cyanide complexation barrier. Subsequent unified oxidation removes cyanide, thus accurately recovering gold resources, preventing precious metal loss, significantly reducing reagent energy consumption and treatment costs, and ensuring more thorough staged cyanide removal and detoxification. This also strictly controls the risk of highly toxic HCN leakage, ensures safe disposal, achieves stable effluent compliance, and reduces hazardous waste production.

This invention belongs to the field of hydrometallurgical technology, specifically relating to a method for enhanced gold extraction from cyanide tailings based on magnetically controlled hydrothermal magnetization activation and manganese doping treatment. The method includes: providing cyanide tailings particles; adding the cyanide tailings particles and a biomass reducing donor to an aqueous medium to form a slurry; adjusting the pH of the slurry to obtain an alkaline reaction system; adding a magnetothermal medium of ferric oxide or ferric chloride to the slurry and stirring with MnSO4 to obtain a reaction slurry; placing the reaction slurry in a closed magnetically controlled hydrothermal reactor and conducting a hydrothermal reaction under an external magnetic field; after cooling the reaction product, performing solid-liquid separation; performing graded magnetic separation on the solid phase; leaching the non-magnetic product using a thiosulfate-ammonia system to allow gold to enter the leaching solution; adding a recyclable magnetic gold-capturing carrier to the leaching solution for adsorption and enrichment; recovering the carrier through magnetic separation and regenerating it through analysis to obtain a gold-rich solution; and recovering gold from the gold-rich solution. The above method can stably achieve a synergistic gain in gold extraction and harm reduction under low-temperature hydrometallurgical conditions.

This invention relates to the field of valuable metal recovery technology, and particularly to a method for recovering valuable metals from cyanide-extracted gold-bearing carbon sludge. The steps are as follows: S1, mix carbon sludge, lime, quartz, and borax evenly, and put them into a smelting device. Place an extractant on top of the mixture and perform high-temperature smelting. After cooling, separate the slag and copper-iron alloy; S2, add the copper-iron alloy obtained in S1 to the extractant and put it into the smelting device for high-temperature melting and extraction. After extraction, cool until the iron phase precipitates. Before the extractant solidifies, remove the iron-rich phase and allow the remaining molten metal to continue cooling; S3, perform vacuum distillation on the valuable metal alloy obtained in S2. After cooling, remove the volatile extractant and the gold-silver-copper alloy. The method for recovering valuable metals from cyanide-extracted gold-bearing carbon sludge provided by this invention can simply and efficiently recover valuable metals from carbon sludge and has good application value.

The utility model discloses a tail gas purification treatment device of biological oxidation gold extraction relates to tail gas purification treatment device technical field, the utility model discloses a main frame mechanism, the main frame mechanism includes the purification tower, the left side fixedly connected with the air inlet pipeline of purification tower outer surface, the top fixedly connected with the exhaust pipe of purification tower, the bottom fixedly connected with the deflector of purification tower inside, the utility model discloses a purification subassembly is set up, specifically is through setting up multilayer carbon filling layer, and carbon filling layer adopts the mixture of active carbon and modified molecular sieve, can increase the contact area and contact time of tail gas and absorption liquid and adsorbent, improve the removal efficiency to harmful gas, simultaneously, sodium hydroxide and hydrogen peroxide in absorption liquid can carry out chemical reaction and oxidation decomposition to different properties harmful gas, thereby realize the efficient purification to multiple harmful gas, effectively reduced the emission concentration of harmful substance in tail gas, and the environmental protection emission standard has been greatly improved.

The application provides a kind of gold-containing material gold extraction performance test method, and relates to gold resource dressing technical field.The method comprises the following steps: grinding the gold-containing material to be tested to a specified fineness, and obtaining parallel samples with uniform gold grade by size reduction;an oxygen-free ore pulp system is constructed;the initial concentration of exogenous gold is calculated according to the material grade and the preset leaching rate, and an oxygen-free exogenous gold cyanide solution matching the industrial conditions is prepared;two groups of parallel tests, pure adsorption group and activated carbon synchronous competition group, are set up, and the reaction is carried out synchronously under the same oxygen-free condition until adsorption equilibrium;the gold grade of the original ore sample and the two groups of test ore samples are measured respectively;the total adsorbed gold amount, irreversible gold extraction amount, reversible adsorbed gold amount and irreversible gold extraction rate are calculated according to the test analysis results, and the gold extraction performance test is completed.The systematic interference of gold leaching from the ore itself is eliminated from the root, and the method is suitable for accurate evaluation of gold extraction performance of various gold-containing materials such as gold ore, gold concentrate, roasted slag and oxidized slag.

This utility model discloses a gold extraction and regeneration device for gold-loaded carbon. The regeneration device includes an aerated carbon extractor, a rich carbon acid washing tank, a desorption column, a lean carbon acid washing tank, and a vibrating screen. The inlet of the aerated carbon extractor is located in the material inside the rich carbon acid washing tank, and the outlet of the aerated carbon extractor is connected to the inlet of the desorption column. The lean carbon outlet of the desorption column is connected to the inlet of the lean carbon acid washing tank, and the outlet of the lean carbon acid washing tank is located above the inlet of the vibrating screen. The regeneration method includes the following steps: (1) rich carbon acid washing; (2) conveying desorption; (3) lean carbon regeneration. Beneficial effects: The gold extraction and regeneration device for gold-loaded carbon disclosed in this utility model ensures that gold and silver are fully separated from activated carbon during the desorption process. It eliminates the need for manual bagging and handling by workers, thereby saving a lot of time and labor costs, greatly improving production efficiency, significantly improving the output efficiency of activated carbon, reducing waiting time and labor costs, improving output quality, and reducing maintenance costs.

This invention discloses a gold extraction process and system using whole-sludge cyanidation without pre-concentration, relating to the field of gold beneficiation and smelting technology. It solves the problems of low grinding efficiency, complex processes, difficulty in recovering coarse gold particles, and high safety risks in existing processes. The process includes raw ore crushing, primary grinding, gravity separation, hydrocyclone classification, secondary grinding-leaching, leaching-adsorption, smelting, and tailings treatment; the system includes corresponding crushing, primary grinding, gravity separation, hydrocyclone classification, secondary grinding-leaching, leaching-adsorption, smelting, and tailings treatment units. The key innovation is: gravity separation recovers coarse gold particles after primary grinding; the secondary stage uses an azin mill to achieve synergistic grinding-leaching, eliminating the pre-concentration stage; and the filtrate reagents are recycled. This invention features a simplified process, low energy consumption, high gold recovery rate, and safe and environmentally friendly operation, suitable for gold extraction from gold ores containing coarse gold particles that require fine grinding.

The application discloses a method for gold extraction by stage potential regulation of thiosulfate, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: mixing gold-containing materials and thiosulfate leaching solution to form ore pulp; dividing the leaching process into three stages, i.e., initial leaching stage, middle leaching stage and late leaching stage; controlling the ore pulp potential in the first target potential interval E1, the second target potential interval E2 and the third target potential interval E3 respectively, and maintaining the time for t1, t2 and t3 respectively, wherein E1>E2>E3, and E3<+200 mV; and separating solid and liquid after leaching, and recovering gold from the leaching solution. The application actively regulates the ore pulp potential in stages, breaks through the technical limitations of the existing constant potential control, realizes the synergistic optimization of the gold leaching rate and the thiosulfate consumption, and has the advantages of high leaching rate, low reagent consumption, short leaching time, wide application range, easy industrialization promotion and the like.

The cyanide tailings roasting and resource utilization process includes cyanide tailings pretreatment and roasting, flue gas cascade separation and utilization, sodium sulfite preparation, fine grinding of roasting slag and secondary cyanide leaching of gold, SO2 de-cyanation treatment of secondary cyanide tailings, preparation of de-cyanation tailings for non-burning bricks and full-process closed-loop control, specifically including six process steps and conditions, which can realize harmless disposal of cyanide tailings, cascade high-value utilization of flue gas SO2, secondary efficient recovery of gold resources and full resource utilization of solid waste, forming a closed loop of "roasting-gold extraction-de-cyanation-resource utilization", thereby reducing the processing cost, improving the environmental protection and economic benefits and the like.

This invention discloses a room-temperature ionic liquid for separating gold, its preparation method, and its application, belonging to the field of precious metal separation technology. This invention provides a room-temperature ionic liquid for separating gold, wherein the cation is a tetramethylguanidine derivative cation, and the anion is a bis(trifluoromethanesulfonyl)imide anion; the structural formula of the tetramethylguanidine derivative cation is as follows: wherein R1 and R2 are both selected from C6-C6. 10 One of the alkyl groups. The guanidine ionic liquid provided by this invention has a novel structure and good stability. As an extractant, this guanidine ionic liquid exhibits excellent extraction efficiency and selectivity for gold, with an extraction rate reaching 99.6%. Furthermore, this guanidine ionic liquid is a room-temperature ionic liquid, avoiding the use of volatile and toxic organic reagents as diluents during gold extraction, making it environmentally friendly and in line with green chemistry principles.

A Method is provided for the hydrometallurgical production of Iron, Lead and Silver from Red Mud and Slug of pyrometallurgy and other similar type of secondary concentrates - residues of production processes, with high concentrations of Iron, Lead and Silver, as well as from residues of Copper White Dust -dust from converters. By applying the proposed method, it is possible to hydrometallurgical production of Iron, Lead and Silver efficiently, from the specific materials, which come from pyrometallurgical methods and other metal production. This specific method enables the hydrometallurgical extraction - production of iron, Lead and Silver from the specific residues of hydrometallurgical and pyrometallurgical processes, using new chemical solutions and processing lines, which until now could not be processed efficiently and essentially remained unutilized, due to low concentrations or due to the chemical compounds in which the metals were found, rendering them non-recoverable.

This invention relates to the field of gold extraction technology and discloses an automated fire testing system, comprising a manual operation area, a sample mixing and melting area, and an ash blowing area. Centered on the manual operation area, a crucible preparation area is connected in series with the starting point of the sample mixing and melting area. The process areas of the sample mixing and melting area are linearly distributed and unidirectionally connected. The melting furnace is located at the far end of the manual operation area and is connected in series with the backup area of ​​the manual operation area via an AGV, forming a closed loop. The ash blowing area is divided into a buffer area, an ash preparation area, and a processing area. The buffer area and the processing area are bidirectionally connected in a closed loop. A novel automated equipment layout is implemented to optimize temperature and process flow, reducing the impact on manual labor while shortening the conveying distance. The improved batching system allows for simultaneous batching and crucible preparation processes. The mixing platform enables pre-batching, multiple interval mixing, and the addition and covering of the covering agent, thereby significantly shortening the linear length of the sample mixing and melting area and improving production line efficiency.

The utility model relates to a system of valuable component recovery from high copper iron complex gold extraction carbon calcination slag, including ball mill, the discharge outlet of ball mill is connected with the feed inlet of hydrocyclone through the ore pulp pump, the sand trap of hydrocyclone is connected with the feed inlet of ball mill, the overflow of hydrocyclone is connected with the feed inlet of flotation system, the concentrate of flotation system is connected with calcination ash system, the tailing of flotation system and the slag outlet of calcination ash system are connected with copper leaching tank, and copper leaching tank is connected with copper recovery system and 1# cyanide leaching tank respectively through 1# filter, and 1# cyanide leaching tank outlet is connected with 2# filter, 2# cyanide leaching tank and 3# filter in proper order. The utility model is cleverly combined with the equipment such as grinding classification closed circuit system, flotation system, copper leaching tank, two stage cyanide leaching and copper recovery system, and the efficient comprehensive recovery of gold, silver and copper in high copper iron complex gold extraction carbon calcination slag is realized.

This invention discloses a DBC-oxalic acid chemical system for gold extraction and purification, belonging to the field of precious metal purification technology. The chemical system includes an extraction component and a reducing component: the extraction component includes the extractant dibutylcarbidol, a hydrochloric acid balancing agent, and optional diluents and phase modifiers; the reducing component includes the reducing agent oxalic acid, a pH adjuster, and optional seeding agents and surfactants. Through the synergistic effect of the extraction and reducing components, the chemical system of this invention achieves integrated selective separation and reduction of gold by utilizing the high selective extraction capability of DBC for Au(III) and the dual function of oxalic acid as both an extraction agent and a reducing agent. The separation coefficient βAu / Ag of this system is >10. 5 βAu / Cu>10 4 The extracted components can be recycled more than 50 times, and the oxalic acid reduction products are CO2 and H2O, which is environmentally friendly.

This utility model relates to the field of gold extraction technology using gold felt blankets, and discloses a high-efficiency gold extraction device for gold gravity extraction using gold felt blankets. It includes a collection trough, a cleaning mechanism fixedly connected to the top of the collection trough, and a collection mechanism located on the right side of the collection trough. The cleaning mechanism includes a support frame fixedly connected to the top of the collection trough. A control cabinet is fixedly connected to the surface of the collection trough. A loading platform is located on the left side of the collection trough, and a unloading platform is located on the right side. Inclined chutes are fixedly connected to the bottom of both the loading and unloading platforms. A support is fixedly connected to the surface of the collection trough. This high-efficiency gold extraction device for gold gravity extraction using gold felt blankets has a high-pressure water gun installed in the collection trough. This allows for controlled water flow of varying strength and velocity to impact the deposited layer on the gold felt blanket, thereby achieving thorough cleaning of the gold felt blanket and recovery of fine gold particles. It replaces manual labor, reducing manpower, increasing efficiency, and minimizing metal loss.

This invention discloses a method for recovering platinum and palladium from the gold extraction solution of silver anode mud. Bismuth is removed through a two-stage hydrolysis process using ferric chloride and sodium hydroxide at room temperature and boiling conditions, achieving highly efficient bismuth removal while avoiding simultaneous hydrolysis loss of precious metals. The bismuth removal efficiency can reach over 96%. A purification agent, primarily sodium diacetate, is added to the bismuth-removed solution to form insoluble metal salts with base metal ions such as nickel, copper, and iron, thus purifying the solution. This agent does not react with platinum and palladium in the solution, preventing any loss of platinum and palladium metals. An organic amine precipitant is added to the copper and nickel-removed solution. The C2H8N2 and C3H8ClN in the precipitant react with high-valence platinum in the solution to form organic amine platinum salts, while the high-valence palladium in the solution does not form salt precipitates, thereby separating platinum and palladium. The separated organic amine platinum salts are then used for platinum refining to produce qualified platinum products, and the palladium-containing mother liquor is used for palladium refining via a complexation acidification process to produce qualified palladium products.

The utility model discloses a kind of microbial screening enrichment devices of biological oxidation gold extraction, it is related to microbial screening enrichment technical field, including main frame mechanism, main frame mechanism includes stirring leaching cabin, the left side of stirring leaching cabin is fixedly connected with drain, the top of the outer surface of stirring leaching cabin is fixedly connected with fixed ring, top is provided with cover, cover bottom and fixed ring top contact, stirring leaching cabin inside is provided with stirring assembly, stirring leaching cabin bottom is provided with filter component, the utility model has the technical effect of stirring, vibration screening, specifically is that starting motor rotates through shaft gear one, simultaneously with gear one rotation, it can be rotated by several gear two to drive several rotating rods, several stirring vanes inside stirring leaching cabin can be rotated by rotating rod to fully stir microorganism, ore and solution inside stirring leaching cabin, avoid local microorganism concentration too high or too low, to ensure that oxidation reaction is efficiently carried out in each part.