111 results about "Heap leaching" patented technology

The invention provides a method for detecting the porosity of ores in a dump leaching process, and belongs to the technical field of detection of the porosity of the ores. The method comprises the following steps: taking a dump leaching ore body, screening, uniformly mixing, splitting, putting into a dump leaching column to obtain the volume of a sample subjected to splitting in the dump leaching column, then performing fine grinding, putting into the dump leaching column to obtain the volume of the sample subjected to fine grinding in the dump leaching column, and then performing image analysis on the sample subjected to fine grinding to obtain the pore volume among sample particles subjected to fine grinding. And finally, converting the three volumes to obtain the porosity of the heap-leached ore. Through screening treatment, the sample representativeness is effectively improved; the ore before superfine grinding and after superfine grinding is introduced into a dump leaching column, the sampling uniformity is controlled, and the accuracy and stability of data are improved through the in-pile process under the same test column; an image analysis algorithm is introduced, and meanwhile, a correction coefficient is introduced, so that small pores among particles are precisely measured and calculated. The method is simple in process and convenient to operate, and the ore porosity can be rapidly and accurately measured and calculated.

The invention provides a method for detecting the porosity of in-situ dump-leached ore, and belongs to the technical field of ore porosity detection. The method comprises the following steps: taking an ore body on site, preparing a filling agent, performing vacuum gradient impregnation, curing, dissolving and separating the ore to obtain a pore model; melting and softening the pore model to obtain the pore volume in the ore, and finally obtaining the porosity of the ore; wherein nano SiO2 is added into the filler resin, and permeation of tiny pores is guaranteed based on the size effect and the interface optimization effect of a nano material; and through vacuum gradient impregnation, sufficient permeation of tiny pores is further ensured. According to the detection method, the limitation of a drainage method on ore pores containing water-soluble minerals is avoided; the problems that ore samples need to be collected and taken back to a laboratory to be detected in a mercury injection method, a gas adsorption method and the like, the ore body structure is damaged, and consumed time is long are solved. Detection can be carried out on site, ore permeability parameters are provided for the in-situ dump leaching process, and a real-time basis is provided for flow selection.

The invention provides a dump leaching method for improving the leaching rate of gold ore, and belongs to the technical field of mineral processing. The method comprises the following steps: firstly, separating minerals into oversize products and undersize products; mixing sodium carboxymethyl cellulose, bentonite and ferrous sulfate to obtain a mixture, and granulating the undersize product by using the mixture as a binder; and mixing the undersize product particles with the oversize product, and carrying out cyanide-free dump leaching. According to the method, through graded granulation and heap building, the problem that heap building permeability is poor due to the fact that the gold ore contains many clay minerals is solved. In the granulation stage, ferrous hydroxide colloid generated by hydrolysis of ferrous sulfate in the binder can assist ore particle agglomeration, and particle stability is enhanced; during subsequent cyanide-free dump leaching, ferrous sulfate can be used as an auxiliary reducing agent and a catalyst in a thiourea gold leaching system to promote oxidation and dissolution of gold; meanwhile, ferrous ions can adjust the oxidation-reduction potential of a system, so that the thiourea gold leaching reaction is in a more favorable potential interval, the oxidation efficiency of thiourea is improved, invalid decomposition of thiourea is reduced, and therefore the use amount of thiourea and the use amount of agents are reduced.

The invention relates to the technical field of metallurgy, in particular to an efficient-utilization copper-cobalt ore dump leaching treatment method which comprises the steps that after copper-cobalt sulfide ore and copper-cobalt oxide ore are subjected to crushing treatment respectively, heap building is conducted; a solution of acidithiobacillus ferrooxidans is added into a sulfuric acid solution to serve as spraying liquid, heap leaching treatment is conducted on the heap-built copper-cobalt ore through a spraying device, and the spraying flow of the spraying device is controlled in the heap leaching treatment process according to changes of the environment temperature and humidity and changes of the pH value of heap leaching liquid; the obtained dump leaching liquid is subjected to extraction-electrodeposition treatment, and cathode metal copper, sediment and raffinate are obtained; and the raffinate serves as spraying liquid to be subjected to spraying circulation, precipitation is neutralized, and metal cobalt is recycled. The spraying flow of the spraying device is accurately controlled and adjusted, and the leaching effect of copper and cobalt metal in the copper-cobalt ore is improved.

The invention provides a low-cyanide gold leaching agent system and a dump leaching process thereof, and belongs to the technical field of hydrometallurgy. According to the method, a synergistic process of'interface activation, cyanide etching and iron precipitation inhibition 'is constructed by designing a low-cyanide gold leaching agent system. The amino acid auxiliary leaching agent adsorbs the gold surface to weaken lattice energy, so that the etching efficiency of trace cyanide ions is improved; mercapto-containing malic acid is used as a chelating agent, specific mercapto in molecules of the mercapto-containing malic acid and iron ions form an ultrahigh-stability water-soluble complex, generation of ferric hydroxide precipitates is thoroughly blocked, ferrous ions stabilized by the chelating agent are subjected to in-situ oxidation through dissolved oxygen and efficiently regenerated into potassium ferricyanide, and accumulation of free cyanogens in a solution system is eliminated; meanwhile, a chelating agent-iron complex forms a self-buffering pair, the pH of the dump leaching solution is accurately controlled, and secondary precipitation caused by local alkalization is prevented. According to the process, under the synergistic effect that the core chelating agent guarantees permeation stability and the leaching aid accelerates gold dissolution, the heap leaching period is compressed to 45 days.

Heap leaching process in chloride environments that uses chemical reactions and minimizes heat losses with the aim of achieving an operating temperature for the leaching of primary and secondary sulfides in ranges from 30°C to 40°C. The process includes semi-autogenous heating of leach heaps, from an initial saline-acid curing with hot brine and subsequent resting of the ore where the temperature increases as a result of the exothermic reactions, followed by thermal activation and subsequent intermittent irrigation, ending with chemical leaching. The combined effect of operating in temperature ranges higher than the ambient condition together with solutions concentrated in chloride ion allow significant improvement in the extraction kinetics of primary and secondary copper sulfides.

The invention belongs to the technical field of metallurgy, and discloses a dump leaching treatment method for copper-cobalt ore. Comprising the following steps: (1) respectively crushing copper-cobalt sulfide ore and copper-cobalt oxide ore; (2) carrying out biological dump leaching on the crushed copper-cobalt sulfide ore and copper-cobalt oxide ore to obtain dump leaching liquid; (3) the dump leaching liquid is subjected to extraction-electrodeposition treatment, a cathode copper product is obtained, and raffinate serves as spraying liquid and returns to the step (2) to be recycled; wherein the acid consumption of the copper oxide-cobalt ore is A kg / t ore, the net acid yield of the copper sulfide-cobalt ore is B kg / t ore, and in the step (2), the ore loading and stacking mass ratio of the copper oxide-cobalt ore to the copper sulfide-cobalt ore is B / A: 1. In the heap leaching process, sulfuric acid or a neutralizing agent does not need to be additionally added, dynamic acid balance of the heap leaching system is achieved, the technological process is simple, production operation is convenient, industrial application is easy to achieve, and remarkable economic benefits are achieved.

The invention discloses a method and a system for improving heap leaching efficiency of metal ore by using micro-nano bubbles, which comprise the following steps: a) generating the micro-nano bubbles: installing a micro-reactor on a leachate conveying pipeline, introducing oxygen or air, and enabling the leachate to pass through the micro-reactor under a certain pressure to generate a leachate containing the micro-nano bubbles; b) conveying the gas-containing leachate: conveying the leachate containing the micro-nano bubbles to an ore dump leaching area, and enabling the leachate to be in full contact with the ore in the dump leaching process; and c) reinforcement of the dump leaching process: promoting leachate to permeate into fine gaps of ore particles by utilizing high permeability and high mass transfer characteristics of the micro-nano bubbles, enhancing the oxidation reaction and improving the leaching rate of metal. According to the method, the metal leaching rate is remarkably increased, the leaching time is shortened, the agent consumption is reduced, and remarkable economic benefits and environmental benefits are achieved.

The invention relates to the field of metallurgy and chemical engineering, in particular to a heap leaching gold extraction method for low-grade gold sulfide ore. Comprising the following steps that an anti-seepage bottom mat is laid on a dump leaching site; pre-treating the sulfide gold ore by using quick lime; ore crushing; ore is poured and piled on the upper portion of the bottom pad; spraying is conducted on the top of the ore heap and a side slope frame pipe, the gold-containing pregnant solution is collected, and the spraying solution is a sodium cyanide solution; and recovering gold from the gold-containing pregnant solution. According to the heap leaching gold extraction method provided by the invention, the quicklime is adopted to carry out pretreatment (iron removal, desulfurization and arsenic removal) on the sulfide gold ore, and then processes of subsequent ore crushing, heap building, spraying, adsorption and the like are carried out, so that the difficult problems of heap leaching utilization and popularization of low-grade sulfide ore resources are solved.

According to the efficient composite ore leaching flora and the application thereof, by optimizing the specific proportion of thiobacillus ferrooxidans, thiobacillus acidophilus, thiobacillus thiooxidans and high-temperature-resistant leptospirillum and combining a directional domestication technology, the tolerance of the flora to ores with high toxicity and complex components is remarkably improved. Extracellular polymeric substances secreted by the flora strengthen mineral surface reaction through chelation, and the copper leaching rate is increased by 40% or above compared with that of a single strain in cooperation with a segmented temperature control process. The flora provided by the invention can realize efficient metal recovery under the condition of low energy consumption, is suitable for large-scale dump leaching and reactor leaching, and has dual advantages of environmental protection and economy.

The invention discloses a method for analyzing the gold occurrence state of a dump leaching sample, and relates to the technical field of mineral processing and process mineralogy analysis. According to the analysis method, through the steps of sample preparation, gold grade calculation and representativeness verification, size grading and enrichment, stepped chemical leaching diagnosis, roasting dissociation and secondary leaching diagnosis, reselection enrichment and precise analysis, occurrence state calculation and the like, the means of reselection, leaching, roasting and the like are systematically combined with a mass balance mathematical model; accurate quantitative analysis of four critical occurrence states of coarse grain gold, leachable gold, wrapped gold and adsorbed gold in the heap leaching process is realized initiatively. The industrial problem that different occurrence states cannot be accurately quantified through a traditional method is solved, and direct and reliable data support is provided for accurate optimization and recovery rate improvement of the dump leaching process.

The invention relates to a method for regulating and deacidifying in a bioleaching process of low-grade copper sulphide ore, aiming at the problem of excessive acid caused by excessive oxidation of pyrite in a dump leaching system, a thiocyanate bactericide is added into the bioleaching system of the low-grade copper sulphide ore, and the thiocyanate bactericide is dissolved in a spray liquid of the bioleaching system, and is added into the spray liquid of the bioleaching system; under the catalytic action of mineral leaching microorganisms, oxidation of ferrous ions is enhanced, so that the oxidation-reduction potential of a solution is increased, oxidation of pyrite is intensified, acid accumulation is excessive, the thiocyanate bactericide can remarkably inhibit the activity of part of sulfur-oxidizing bacteria and even kill part of sulfur-oxidizing bacteria, and therefore the activity of ferrous oxide is reduced; compared with the prior art, the method has the advantages that the sulfur oxidation activity of microorganisms is greatly influenced, but the oxidation influence on iron is relatively small, so that the acid leaching is reduced under the condition that the copper leaching of the copper sulfide ore is not influenced, the copper leaching is not influenced, the acid leaching is reduced, the production cost is reduced, the environmental influence is reduced, and the like.

A system for dynamic oxidation of a heap of copper ore includes a “process island” for formulating and dispensing oxidizing reactive mixtures having predetermined compositions, and irrigating the heap with the mixtures to progressively transform the ore and maintain conditions for enhanced recovery of metal by heap leaching, solvent-extraction and electrowinning. In embodiments, the system is adapted to obtain copper metal from the refractory copper mineral chalcopyrite.

The application provides a heap leaching ore porosity analysis method and relates to the technical field of mineral processing and geological analysis. The analysis method associates material particle size composition, target element occurrence state and pore structure, can significantly improve the practicability of porosity evaluation, and thus overcomes the technical problem that the traditional method cannot reveal that the occurrence state and content distribution of target valuable elements in different particle sizes are significantly different, and then leads to the problem that different particle sizes do not contribute equally to the overall porosity.

This application relates to the field of heap leaching simulation devices, and more particularly to a heap leaching simulation device for efficient separation of impurities in phosphogypsum. The technical solution includes a modular heap leaching column, multi-layer independently controlled spray support components, a liquid supply system, a liquid return system, and a control unit. Each layer within the heap leaching column is equipped with independently operable spray components. The control unit can sequentially activate different spray levels from top to bottom or bottom to top, and return the leachate collected at the bottom to the top for re-rinsing. By having each layer of phosphogypsum sequentially act as the top, middle, and bottom layers in the circulation, the leachate repeatedly passes through multiple layers of phosphogypsum in various sequences, effectively eliminating the concentration gradient formed by the consumption of effective components and the accumulation of impurities during traditional drip leaching, achieving balanced impurity removal from each layer of phosphogypsum. This invention has advantages such as uniform impurity removal, high reagent utilization, and flexible operation, and is suitable for simulation research of phosphogypsum heap leaching impurity removal processes.

The invention provides a leaching and permeation effect evaluation method based on a multi-section column leaching device, and relates to the technical field of gold ore dump leaching engineering.The method comprises the following steps that leachate generated in the column leaching process is collected, and target components in the leachate are quantitatively measured; collecting residual leaching residues at different segmented column body positions after column leaching, and quantitatively determining target components in the leaching residues; obtaining the leaching rate of the target component according to the measured content of the target component in the leaching liquid and the content of the target component in the leaching residue; and after the column leaching is completed, sampling the segmented column body to obtain the permeability effect evaluation, namely the permeability coefficient. Based on the leaching rate and the permeability coefficient, a leaching effect difference value and a permeability effect difference value are obtained; and according to the leaching effect difference value and the permeability effect difference value, the material using mode is judged. According to the method provided by the invention, the leaching effect and the permeation effect in the column leaching process are quantitatively evaluated, and the method has important practical significance in guiding selection of dump leaching conditions.

The present invention discloses a microbial remediation method for soil in rare earth heap leaching mines. The method comprises the following steps: mixing a composite microbial agent, distilled water, sucrose, potassium dihydrogen phosphate, magnesium sulfate, and sodium chloride to obtain a mixed solution A; adding modified zeolite to the mixed solution A and stirring to obtain a mixed solution B; adding chitosan to an acetic acid aqueous solution, followed by adding polyvinyl alcohol and stirring to obtain a mixed solution C; mixing Span 80 and liquid paraffin uniformly and heating to 40-50°C; then adding the mixed solution C under stirring; and then sequentially adding the mixed solution B and glutaraldehyde to the mixture and continuing to stir to obtain slow-release microspheres; mixing calcium hydroxide, water, polyethylene glycol, and the slow-release microspheres to obtain a soil conditioner; rinsing the mine soil with water for 1-2 days, turning the soil when the weather is clear, then drying it for 1-2 days and leveling the land, and then spraying the soil conditioner onto the soil. The present invention is suitable for the improvement and remediation of soil in rare earth heap leaching mines and has the characteristics of high applicability and good improvement and remediation effect.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a dump leaching treatment process for argillaceous low-grade uranium-containing molybdenum ore. The argillaceous low-grade uranium-containing molybdenum ore is subjected to crushing treatment, and mineral fine materials are obtained; granulating the mineral fine material, concentrated sulfuric acid and water, and curing to obtain a cured material; and roasting the cured material at the temperature of 250-500 DEG C, and then carrying out cooling, heap building and acid leaching treatment to obtain a leachate enriched with molybdenum and uranium. According to the technology, the physical and chemical structure of the mineral is optimized, the problems that the mineral is prone to argillization and fine dissemination can be solved, the leaching rate of the mineral can be improved, especially the permeability of an ore heap under a high heap can be improved, and the leaching effect under the high heap is achieved. The method is low in total investment and treatment cost, high in uranium and molybdenum concentration in the leachate, short in process and easy to realize industrial application.

The invention relates to a heap leaching field spraying device which comprises a spraying device and a spraying liquid circulation device, the spraying device is composed of a transition box, a shunt pipe, a liquid inlet pipe, a spraying pipe and a spraying end, a cathode panel is fixed on the lower side of a transition end cover on the transition box, and an anode bar is fixed in a sealing end cover of the liquid inlet pipe; the spray liquid circulating device comprises a treatment box, a return pipe and a drain pipe, a current collection rod is fixed on a mounting panel sleeved with a rear port of the return pipe, a first water pumping impeller is arranged on the upper side of the mounting panel, a second water pumping impeller is arranged in the treatment box, and a current collection panel and a cathode electrolysis rod are arranged on the middle upper part of a front end cover in front of the treatment box; the metal content in the spraying liquid is reduced in an electrolysis mode, an electric field is formed between the anode bar and the cathode panel through positive feedback in the electrolysis process, metal cations and cyanide anions are further promoted to be separated in the liquid inlet pipe, and the influence of the metal cations on the spraying effect is reduced.

This invention relates to a dynamic circulating gradient adsorption process and system for gold extraction from precious metal solutions, comprising: separating the precious metal solution into high, medium, and low grades; targeted calcium ion inhibition and synergistic scale inhibition treatment, which involves adding a composite agent of polyaspartic acid, sodium citrate, and carboxymethyl chitosan to the different grades of precious metal solutions to form soluble and stable complexes of free calcium ions in each solution, preventing scaling; and cross-group dynamic carbon circulating gradient adsorption, in which different grades of precious metal solutions are transferred to corresponding adsorption tower groups at different flow rates for activated carbon adsorption, and gold-loaded carbon is circulated across groups during adsorption to improve adsorption efficiency and shorten the adsorption cycle. The system includes multiple heap leaching fields, each connected to a No. 1, No. 2, and No. 3 precious metal solution pipe. This invention significantly improves the gold recovery rate from precious metal solutions, optimizes adsorption efficiency, and provides an efficient, economical, and environmentally friendly solution for heap leaching gold extraction.

The application discloses a method for recovering zinc and lead metals from lead-rich slag generated in a zinc smelting process, which comprises low-temperature acid leaching, magnetic separation, oxidation heap leaching, stirring leaching and the like processes, so that the lead-rich slag is subjected to low-temperature acid leaching and magnetic separation first, zinc compounds which are easily soluble are leached out sufficiently, and the content of iron ions entering the liquid phase is effectively reduced, thereby reducing the interference of iron ions in the zinc liquid, then the processes of oxidation heap leaching and stirring leaching are combined, and zinc ferrite and zinc sulfide minerals which are difficult to be acid-dissolved can be further dissolved, the zinc-containing substances basically enter the liquid phase, the target of separating lead and zinc is achieved, and finally, combined with dilute hydrochloric acid washing, part of calcium and silicon compounds can be dissolved, so that the lead grade in the final slag is improved, and comprehensive utilization is realized.

The low-grade nickel ore circulating heap leaching equipment provided in this invention includes: atmospheric pressure heap leaching pool, a number of acid pools corresponding one-to-one with the atmospheric pressure heap leaching pool, and an acid circulation structure. The discharge outlet of the atmospheric pressure heap leaching pool is connected to the acid pool, and the acid circulation structure is connected to the atmospheric pressure heap leaching pool and the acid pool. It is used to detect the nickel content in the acid pool and guide the liquid from a certain acid pool to a certain atmospheric pressure heap leaching pool based on the detection results. In this way, the circulating drip irrigation of acid solution can be realized to realize circulating leaching of nickel ore, so that the nickel in the acid solution can be gradually enriched, and the leaching of nickel can be realized without increasing the amount of acid solution, effectively reducing the treatment cost of low-grade nickel ore.

The application discloses a low grade nickel ore cycle leaching method and system, the method includes the following steps: the raw ore is divided into mud type ore and particle ore; The mud type ore is sent to several atmospheric pressure heap leaching pools, and the grain type ore is sent to atmospheric pressure stirring leaching pools. Drip irrigation of acid solution to multiple atmospheric pressure heap leaching pools and recovery of the leaching solution of each atmospheric pressure heap leaching pool; The nickel content concentration in the leaching solution of each atmospheric pressure heap leaching pool was detected. According to the nickel content concentration in the leaching solution of each atmospheric pressure heap leaching pool, the leaching solution of a certain atmospheric pressure heap leaching pool was drip-irrigated into another certain atmospheric pressure heap leaching pool. This application provides a low grade nickel ore cycle leaching system, including a ore washing module, a gravity beneficiation module, a churn leaching module and a heap leaching module. The low grade nickel ore cycle leaching method and system provided in this application can realize the cycle leaching of nickel ore and gradually enrich nickel in the acid solution. On the premise of not increasing the amount of acid solution, the nickel leaching can be realized and the processing cost of low grade nickel ore can be effectively reduced.

The invention belongs to the field of uranium ore treatment, and particularly relates to an alkaline argillaceous sandstone type uranium ore dump leaching treatment method which comprises the following steps: crushing alkaline argillaceous sandstone type uranium ore to obtain fine ore; mixing the fine crushed ore with an alkaline component and a curing aid, and curing; then carrying out roasting treatment at the temperature of 250 to 400 DEG C; an alkaline aqueous solution is adopted as a cooling medium to conduct spraying cold quenching on the roasted product, and pretreated ore is obtained; the curing auxiliary agent is a component with oxidability; and heaping the pretreated ore, and then carrying out alkaline leaching treatment by adopting an alkaline leaching agent. Through combination of curing-roasting and cold quenching, the physical and chemical structure can be optimized, the problems of poor permeability, liquid accumulation and the like of fine-grained alkaline argillaceous sandstone type uranium ore can be solved, and the leaching effect of uranium can be improved.

The invention belongs to the field of hydrometallurgy, and particularly relates to a weathering crust illuviation type rare earth ore screening system and a layered and graded rare earth heap leaching method. The system comprises a feeding device, a screening device, a conveying device, an ore heap, a liquid preparing pool and a liquid collecting pool which are sequentially arranged, and a cofferdam is arranged at the top of the ore heap. The method comprises the following steps: 1) after an ore heap is arranged by using weathering crust elution-deposited rare earth ore, spraying a composite ammonium solution in a solution preparation pool to the top of the ore heap through a spraying pipeline, and maintaining the liquid level height in a cofferdam at 5-10cm; (2) after the composite ammonium solution is sprayed, clear water is sprayed to the top of the ore heap through a spraying pipeline, water-soluble ammonium in the ore heap is flushed out, and the rare earth dump leaching process.By means of the method, the dump leaching efficiency of the weathering crust elution-deposited rare earth ore can be effectively improved, the ore leaching period is shortened, the rare earth leaching rate is increased, and the consumption of a leaching agent in the dump leaching process is reduced.

The invention provides a laboratory column leaching method, and belongs to the technical field of hydrometallurgy. According to the method, interference of fine-grained materials and coarse-grained gold on leaching is effectively eliminated through rigorous particle size separation and pretreatment steps, and the effect that the fine-grained materials are stacked and covered on the surface of deep leached ore along with a leaching agent in the simulated dump leaching process and the pressure borne by the deep ore are combined, so that the leaching efficiency of the deep leached ore is improved. The physical and chemical conditions of the deep ore in the dump leaching process are further simulated, the industrial dump leaching conditions are more truly reduced, the actual leaching rate of elements to be recycled in the ore in the actual dump leaching process is accurately evaluated, production is guided, and scientific data support is provided.

A method for heap leaching metals from ROM material containing metal sulfide-bearing materials, such as copper sulfide-bearing minerals. The method includes forming a heap of ROM material or expanding an existing heap by adding ROM material to the heap. The method also includes leaching metals from the ROM material in the heap using an acidic leach solution to produce a pregnant leach solution containing the metals in solution, and recovering the metals from the pregnant leach solution. Pyrite already present in the ROM material generates acid and heat to facilitate the leaching of metals from the ROM material. The ROM material may be transported directly from the mine to a stockpile without changing the size of the material particles in the ROM material. The method may also include adding additional pyrite and other additives to facilitate the leaching of metals.

The invention discloses an ammonia-process dump leaching method for copper sulphide ore, which comprises the following steps: treating the copper sulphide ore by adopting a dump leaching mode at a leaching agent temperature of-10-4 DEG C, taking an ammonium salt solution as a leaching agent, controlling the total ammonia concentration of the leaching agent to be 0.5-5mol / L and the pH range to be 7.5-9.5, adding the leaching agent into the copper sulphide ore by adopting a dripping leaching mode, and the copper-containing leachate is extracted and then returned to the leaching process, and ammonia and the ammonia leaching accelerant in the copper-containing leachate are recycled. The temperature of the leaching agent is controlled to be-10-4 DEG C for leaching, the ammonia consumption in the ammonia leaching process can be remarkably reduced, the leaching efficiency of copper under the low-temperature condition can be improved by adding the ammonia leaching accelerant, meanwhile, the copper-containing leachate is returned to the leaching process after being extracted, ammonia and the ammonia leaching accelerant in the copper-containing leachate are recycled, the purpose of effectively leaching chalcopyrite under the low ammonia consumption is achieved, and the method is suitable for large-scale industrial production. And a new technology is provided for development and utilization of low-grade primary copper sulphide ore in alpine regions.

The application provides a heap leaching process ore porosity detection method, and belongs to the technical field of ore porosity detection. The application takes heap leaching ore bodies, screens, mixes, divides, and then enters a heap leaching column to obtain the volume of the sample after division in the heap leaching column, then performs fine grinding, enters the heap leaching column again to obtain the volume of the sample after fine grinding in the heap leaching column, then performs image analysis on the sample after fine grinding to obtain the pore volume between the sample particles after fine grinding, and finally performs conversion through the three volumes to obtain the porosity of the heap leaching ore. Through screening treatment, the sample representativeness is effectively improved; the ore before and after superfine grinding is introduced into the heap leaching column, and the uniformity of sampling and the heap flow under the same test column are controlled, so that the accuracy and stability of data are improved; the image analysis algorithm is introduced, and a correction coefficient is introduced at the same time, so that the small pores between the particles are accurately calculated. The method has a simple process and convenient operation, and can quickly and accurately calculate the ore porosity.