CN108950200B - Method for recovering associated gold by dearsenifying gold-loaded high-arsenic copper concentrate - Google Patents
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/12—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
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- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
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- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0084—Treating solutions
- C22B15/0089—Treating solutions by chemical methods
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- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
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- C—CHEMISTRY; METALLURGY
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
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Abstract
The invention relates to a method for recovering associated gold by dearsenifying gold-loaded high-arsenic copper concentrate, which sequentially adopts the following steps under certain process conditions: leaching, namely adding a sodium hydroxide solution, a sodium sulfide solution or a sodium hydrosulfide solution into the gold-loaded high-arsenic copper concentrate to carry out size mixing; solid-liquid separation, namely adding the slurry into a high-pressure kettle and then performing pressurization dearsenification; washing, namely adding the arsenic-removed ore pulp into a vacuum belt filter for filtering and washing, and extracting copper from qualified copper concentrate in a smelting plant; reducing and precipitating, mixing the washing liquid with part of the arsenic-containing high-concentration stock solution, controlling the concentration of NaOH, adding thiourea dioxide for reduction reaction, filtering and washing the reacted slag slurry to obtain an arsenic-containing solution with the gold concentration lower than 0.05mg/L and gold-containing filter residues, and extracting gold from the gold-containing filter residues to a smelting plant. The method has the advantages of high-efficiency copper and arsenic separation, high comprehensive recovery rate of associated gold, waste treatment by waste, stable arsenic existence, environmental friendliness due to wet dearsenification and the like, and is suitable for application in the metallurgical industry.
Description
Technical Field
The invention relates to a method for recovering associated gold by dearsenization of gold-loaded high-arsenic copper concentrate, which is suitable for application in the metallurgical industry.
Background
Copper belongs to the national strategic resource and occupies an important position in national economy. Statistically, over 70% of the worldwide refined copper is produced by pyrometallurgical processes. However, copper concentrates containing group 15 elements (As, Sb, Bi) remain a challenge for pyrometallurgical processes. Arsenic belongs to a thiophilic element, and more than 300 kinds of known arsenic-containing minerals are included in gold, copper, lead, zinc, tin, nickel and cobalt ores mostly in the form of sulfides. In 15% of copper ore resources in the world, the mass ratio of As to Cu reaches 1/5, namely more than 0.2 ton of arsenic is correspondingly brought out by mining 1 ton of copper. As the development of the easily-treated copper ore resources is almost exhausted, the difficultly-treated copper ore resources containing arsenic and the like become main raw material sources. However, the surface properties of the arsenious mineral such as the copper-sulfur-arsenic ore are similar to those of the associated copper sulfide ore (copper blue, chalcocite, chalcopyrite and the like), and the selectivity is very close to that, so in the conventional flotation process, the arsenious ore inevitably enters the copper concentrate along with other copper minerals, and the arsenic grade of the copper concentrate exceeds the standard. The high-arsenic copper concentrate can generate a large amount of arsenic-containing smoke dust in the roasting process, and an expensive smoke dust treatment system is required for treatment; the produced arsenic-containing materials such as arsenic white and arsenic filter cakes have strong toxicity, narrow application, small dosage and easy dissolution in water; meanwhile, in the process of smelting and solidifying the metal copper, due to the arsenic, an arsenic compound is formed at the edge of a copper metal crystal grain, so that the mechanical strength of the metal copper is low, and cracks are formed in the processing process to reduce the conductivity of the metal copper. Except for individual pyrometallurgical plants, most smelters require that the copper concentrate contains arsenic not more than 0.5%, or even not more than 0.3%.
In order to solve the problems, Chinese patent CN 105132671A discloses a high-temperature pyrogenic dearsenification process and a device for copper concentrate, which comprises the steps of putting the ground and dried copper concentrate into a rotary kiln, heating the copper concentrate at the temperature of between 400 ℃ and 600 ℃ in a nitrogen atmosphere, sublimating arsenic element and elements with low melting points into mixed gas containing gaseous arsenic, separating impurities with heavy mass, separating out the pure gaseous mixed gas containing gaseous arsenic by cooling, condensing and settling to extract arsenic element, and refluxing the nitrogen into a nitrogen generator for repeated use, but the problems that the operating environment temperature is high, the arsenic-containing gas is discharged into air, and the arsenic needs to be further stabilized and harmless are solved; chinese patent CN 03117196.6 discloses a new process for wet smelting of arsenic-containing copper sulfide concentrate, which is characterized in that the copper concentrate is oxidized by oxygen under the conditions of high temperature, high pressure, high copper ion concentration and high chloride ion concentration to obtain a copper ion leaching solution and sulfur and arsenic-containing leaching residues, but the process has high temperature, has high requirements on the material of an autoclave under the environment of strong acid and high chloride ion concentration, and simultaneously generates elemental sulfur to wrap the copper concentrate to cause the problems of incomplete oxidation and the like; chinese patent CN106460089A discloses a method for recovering copper from arsenic and/or antimony-containing copper sulfide concentrate, which is a process for pressure oxidation of ultrafine-ground arsenic and antimony-containing copper sulfide minerals in the presence of a surfactant and a halogen, and also belongs to a wet total oxidation process at high temperature, high pressure and high halogen ion concentration, but also has the problems of high requirements for the material quality of an autoclave; chinese patent CN 104117433A discloses a method for selecting copper concentrate from copper ore with high content of sulfur and arsenic, which is to inhibit pyrite, preferentially float copper minerals step by step, and finally selectively remove the copper ore with sulfur and arsenic in the copper concentrate, the method realizes the flotation separation with the copper ore with sulfur and arsenic according to the difference of surface chemical oxidation resistance of the minerals, and obtains qualified copper concentrate, but the method does not mention how to effectively process the high-arsenic copper concentrate obtained by the flotation separation; chinese patent CN 102373337A discloses a process for treating complex gold ore containing copper and arsenic, which treats complex gold ore containing copper and arsenic by a combined flow of gravity separation, flotation, cyaniding leaching and arsenic concentrate roasting, and the process is similar to the conventional roasting process in that arsenic is generated by roasting high-arsenic concentrate, so that the process has the problems of high requirement on an environment-friendly treatment system, relatively severe operating environment, harmless treatment of the generated arsenic and the like; chinese patent CN 105506303A discloses a method for separating arsenic and antimony from copper ore containing arsenic and antimony, which comprises mixing copper ore containing arsenic and antimony with catalyst and additive, heating and smelting at high temperature under sealed vacuum environment condition to cause chemical reaction, separating arsenic and antimony from copper in gaseous form, and obtaining copper concentrate containing arsenic less than 0.3%, arsenic concentrate containing sulfur and arsenic more than 80% and antimony concentrate powder containing antimony more than 45%, but the method has the defects of continuous harmless treatment and unsafe stockpiling of arsenic concentrate; chinese patent CN 105463210 a discloses a "smelting method of high-impurity copper concentrate", in which impurity elements of lead, zinc, arsenic, antimony, bismuth and tin are removed from the whole copper smelting process at the place closest to the source of the whole copper smelting process, but in essence, the method is still a high-temperature roasting method.
Therefore, the method for recovering the associated gold by dearsenifying the gold-loaded high-arsenic copper concentrate is particularly urgent, is environment-friendly, and can be used for selectively removing arsenic from the high-arsenic copper concentrate in advance and recovering the associated gold.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for recovering associated gold by dearsenization of gold-loaded high-arsenic copper concentrate, which can realize copper-arsenic separation and recover associated gold and is environment-friendly.
The task of the invention is completed by the following technical scheme:
a method for recovering associated gold by dearsenifying gold-loaded high-arsenic copper concentrate is sequentially carried out according to the following steps and conditions:
(A) leaching, namely adding a sodium hydroxide solution, a sodium sulfide solution or a sodium hydrosulfide solution into the gold-loaded high-arsenic copper concentrate with the particle size of-37 mu m accounting for more than 80% obtained by flotation for size mixing until the concentration of the sodium hydroxide is 30-120 g/L, and S2-The concentration of (a) is 10-26 g/L, and slurry with the concentration of 15-45 wt.% is obtained;
(B) solid-liquid separation a, adding the slurry with the concentration of 15-45 wt.% into an autoclave, and then performing pressurization dearsenification, controlling the reaction temperature to be 120-200 ℃, the reaction pressure to be 0.10-1.56 MPa, the reaction time to be 0.5-3 h, and the stirring linear velocity to be 2.0-4.0 m/s, so as to obtain arsenic-containing high-concentration stock solution and dearsenification ore pulp;
(C) washing, namely adding the arsenic-removed ore pulp into a vacuum belt filter for filtering and washing, controlling the vacuum degree to be 0.03-0.06 MPa, the washing water pressure to be more than 0.3MPa and the washing water ratio to be 0.61-0.63, obtaining qualified copper concentrate with the arsenic content of less than 0.05 wt.% and washing liquid, and extracting copper from the qualified copper concentrate to a smelting plant;
(D) and (2) carrying out reduction precipitation, mixing the washing liquid with part of the arsenic-containing high-concentration stock solution, controlling the concentration of NaOH to be 50-100 g/L, adding thiourea dioxide to carry out reduction reaction, controlling the temperature of the reduction reaction to be 60-80 ℃, the reaction time to be 10-40 min and the concentration of the thiourea dioxide to be 0.3-1.0 g/L, filtering and washing the reacted slurry to obtain an arsenic-containing solution with the gold concentration lower than 0.05mg/L and gold-containing filter residues, and extracting gold from the gold-containing filter residues to a smelting plant.
The percentages referred to in the specification are mass percentages, the gold-loaded high-arsenic copper concentrate is represented by arsenic-containing minerals such As enargite, tennantite and the like, the Au grade is more than 2g/t, the As content is 0.5-15 wt.%, the S content is 35-45 wt.%, and the Cu content is 20-40 wt.%.
Compared with the prior art, the invention has the following advantages and effects:
(1) and (3) high-efficiency copper and arsenic separation is carried out, the grade of arsenic after treatment is as low as 0.01%, and copper is completely reserved in the copper concentrate after arsenic removal.
(2) Meanwhile, the comprehensive recovery rate of associated gold is up to more than 95%, and the principle of 'early receiving and then receiving' of gold is followed, so that the benefit maximization of the mine is realized.
(3) The method makes full use of the components in the two waste water to realize the high-efficiency comprehensive utilization of resources and simultaneously realize the reduction of slag.
(4) The arsenic exists in a stable form and can be safely stockpiled in situ in a mine, and the potential environmental pollution risk brought by the arsenic in the transportation and smelting process is reduced.
(5) The wet dearsenification method avoids the inconspicuous discharge of arsenic-containing waste gas in pyrometallurgy and is environment-friendly.
Drawings
FIG. 1 is a process flow chart of a method for recovering associated gold by dearsenifying gold-loaded high-arsenic copper concentrate according to the invention.
In the drawings, the designations represent:
1. gold-bearing high-arsenic copper concentrate 2, sodium hydroxide 3, sodium sulfide/sodium hydrosulfide 4, arsenic-containing high-concentration stock solution 5, qualified copper concentrate 6, thiourea dioxide 7, gold-containing filter residue 8, iron-containing acidic wastewater 9, lime milk 10, overflow liquid 11, underflow
The description is described in further detail below with reference to the accompanying drawings.
Detailed Description
As shown in figure 1, the method for recovering associated gold by dearsenifying the gold-loaded high-arsenic copper concentrate sequentially comprises the following steps and conditions:
(A) leaching, namely adding a solution of sodium hydroxide 2 and sodium sulfide or sodium hydrosulfide 3 into the gold-loaded high-arsenic copper concentrate 1 with the size of-37 mu m and the content of more than 80% obtained by flotation for size mixing until the concentration of the sodium hydroxide is 30-120 g/L, and S2-The concentration of (a) is 10-26 g/L, and slurry with the concentration of 15-45 wt.% is obtained;
(B) solid-liquid separation a, adding the slurry with the concentration of 15-45 wt.% into an autoclave, and then performing pressurization dearsenification, controlling the reaction temperature to be 120-200 ℃, the reaction pressure to be 0.10-1.56 MPa, the reaction time to be 0.5-3 h, and the stirring linear velocity to be 2.0-4.0 m/s, so as to obtain arsenic-containing high-concentration stock solution 4 and dearsenification ore pulp;
(C) washing, namely adding the arsenic-removed ore pulp into a vacuum belt filter for filtering and washing, controlling the vacuum degree to be 0.03-0.06 MPa, the washing water pressure to be more than 0.3MPa and the washing water ratio to be 0.61-0.63, obtaining qualified copper concentrate 5 with the arsenic content of less than 0.05 wt% and washing liquid, and extracting copper from the qualified copper concentrate 5 to a smelting plant;
(D) and (3) carrying out reduction precipitation, mixing the washing liquid with part of the arsenic-containing high-concentration stock solution 4, controlling the concentration of NaOH to be 50-100 g/L, adding thiourea dioxide to carry out reduction reaction, controlling the temperature of the reduction reaction to be 60-80 ℃, the reaction time to be 10-40 min and the concentration of the thiourea dioxide to be 0.3-1.0 g/L, filtering and washing the reacted slurry to obtain an arsenic-containing solution with the gold concentration lower than 0.05mg/L and gold-containing filter residue 7, and extracting gold from the gold-containing filter residue 7 to a smelting plant.
The process of the invention may further be:
performing aeration neutralization on the arsenic-containing solution with the gold concentration lower than 0.05mg/L and the iron ore-containing mountain acidic wastewater, which are subjected to reduction precipitation in the step (D), and controlling the air amount to be 50-150 m3Adjusting the pH value to 7-9 by using 30% lime milk, wherein the lime milk contains iron ore and mountain acidThe pH value of the acidic wastewater is 1.2-1.8, the concentration of Fe ions is 5-15 g/L, the proportion of the arsenic-containing solution to the acidic wastewater containing iron ore is controlled to enable the mass ratio of Fe to As to be more than 5, and the arsenic-containing solution neutralized by aeration is obtained.
And (3) carrying out solid-liquid separation b on the arsenic-containing solution subjected to aeration neutralization, carrying out thickening treatment on the separated slurry to obtain overflow liquid 10 and underflow 11, and pumping the underflow 11 to a neutralization slag warehouse for stockpiling.
And (3) returning one part of the overflow liquid 10 to the step (A) for leaching and recycling, and treating the other part of the overflow liquid to reach the standard and discharge.
And (C) mixing the other part of the arsenic-containing high-concentration stock solution 4 obtained by solid-liquid separation in the step (B) with a part of overflow liquid 10 obtained by thickening treatment in the solid-liquid separation B, returning the mixture to the step (A) for leaching and reusing the mixture as a solution for size mixing, and sending the other part of the arsenic-containing high-concentration stock solution to the step (D) for reduction and precipitation.
The following further describes embodiments of the present invention with reference to specific examples.
Example 1
Carrying out size mixing on gold-loaded high-arsenic copper concentrate (Au 2g/t, As 0.5 wt.%, S35 wt.%, Cu 20 wt.%) until the pulp concentration is 15 wt.%; adding NaOH and Na into the ore pulp2S or NaHS to the concentration of NaOH of 30g/L, S2-The concentration of the ore pulp is 10g/L, then the ore pulp is pumped into a high-pressure kettle, and pressurized dearsenification and gold leaching are carried out at the temperature of 120 ℃, the pressure of 0.50MPa and the stirring linear speed of 2.0 m/s; the pressure dearsenifying gold leaching ore pulp is discharged by a screw pump or is filtered and washed after flash evaporation to obtain qualified copper concentrate with the arsenic grade of 0.05 percent and the gold grade of 0.1g/t, high-concentration arsenic-containing leaching solution and washing solution, and the qualified copper concentrate is used for pyrometallurgy in a smelting plant; mixing the high-concentration arsenic-containing leaching solution with a washing solution, controlling the concentration of gold to be 5mg/L, reducing and recovering gold by thiourea dioxide, wherein the reaction temperature is 60 ℃, the concentration of NaOH in the solution is 50g/L, the concentration of thiourea dioxide is 0.3g/L, the reaction time is about 40min, the concentration of gold in the solution is lower than 0.05mg/L, stopping the reaction, filtering and washing the reaction-obtained slag pulp, and purifying the gold-containing filter slag in a smelting plant; mixing and aerating the arsenic-containing solution after gold recovery and the acidic wastewater containing iron ore and mountain, and then adjusting the pH to 7-9 by using lime, wherein the acidic wastewater containing iron ore and mountainThe pH value is 1.2, the concentration of Fe ions is 7g/L, and the proportion of the arsenic-containing solution and the acidic wastewater containing iron ore is controlled to ensure that the mass ratio of Fe to As is 6; carrying out dense solid-liquid separation on the reaction slag slurry to obtain a neutralization slag bottom flow and an overflow liquid, pumping the bottom flow to a neutralization slag warehouse for piling up, and discharging most of the overflow liquid after the overflow liquid is detected to be qualified; and (4) mixing part of the overflow liquid with the high-concentration arsenic-containing leaching liquid obtained in the step (C), and returning to the step (A) for carrying out size mixing on the gold-loaded high-arsenic copper concentrate.
Example 2
Carrying out size mixing on gold-loaded high-arsenic copper concentrate (10 g/t, 15 wt.% As, 35 wt.% S, 20 wt.% Cu) until the pulp concentration is 15 wt.%; adding NaOH and Na into the ore pulp2S or NaHS to the concentration of NaOH therein of 100g/L, S2-The concentration of the ore pulp is 32g/L, then the ore pulp is pumped into a high-pressure kettle, and pressurized dearsenification and gold leaching are carried out at the temperature of 200 ℃, the pressure of 1.55MPa and the stirring linear speed of 2.0 m/s; carrying out flash evaporation on the pressurized dearsenification gold leaching ore pulp, filtering and washing to obtain qualified copper concentrate with the arsenic grade of 0.04 percent and the gold grade of 2g/t, high-concentration arsenic-containing leaching solution and washing solution, wherein the qualified copper concentrate is used for pyrometallurgy in a smelting plant; mixing the high-concentration arsenic-containing leaching solution with a washing solution, controlling the concentration of gold to be 8mg/L, reducing and recovering gold by thiourea dioxide, wherein the reaction temperature is 80 ℃, the alkalinity of the solution is 100g/L, the dosage of the thiourea dioxide is 1.0g/L, the reaction time is about 20min, the concentration of gold in the solution is lower than 0.05mg/L, stopping the reaction, filtering and washing the reaction-obtained slag slurry, and purifying the gold-containing filter slag in a smelting plant; mixing and aerating the arsenic-containing solution after gold recovery and the acidic wastewater containing iron ore and mountain acid, and then adjusting the pH to 7-9 by using lime, wherein the pH of the acidic wastewater containing iron ore and mountain acid is 1.1, the concentration of Fe ions is 15g/L, and the mass ratio of Fe/As is controlled to be 7 by controlling the ratio of the arsenic-containing solution to the acidic wastewater containing iron ore and mountain acid; and (3) carrying out dense solid-liquid separation on the reaction slag slurry to obtain a neutralization slag bottom flow and an overflow liquid, pumping the bottom flow to a neutralization slag warehouse for stacking, discharging most of the overflow liquid after the overflow liquid is detected to be qualified, mixing part of the overflow liquid with the arsenic-containing leachate with high concentration obtained in the step (C), and returning to the step (A) for mixing the gold-loaded high-arsenic copper concentrate.
As described above, the present invention can be preferably realized. The above embodiments are only preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments, and other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be regarded as equivalent replacements within the protection scope of the present invention.
Claims (5)
1. A method for recovering associated gold by dearsenifying gold-loaded high-arsenic copper concentrate is characterized by comprising the following steps and conditions in sequence:
(A) leaching, namely adding a sodium hydroxide (2) solution and a sodium sulfide or sodium hydrosulfide (3) solution into the gold-loaded high arsenic copper concentrate (1) with the size of-37 mu m accounting for more than 80% obtained by flotation for size mixing until the concentration of the sodium hydroxide is 30-120 g/L, and S2-The concentration of (a) is 10-26 g/L, and slurry with the concentration of 15-45 wt.% is obtained;
(B) solid-liquid separation a, adding the slurry with the concentration of 15-45 wt.% into an autoclave, pressurizing and dearsenifying, controlling the reaction temperature to be 120-200 ℃, the reaction pressure to be 0.10-1.56 MPa, the reaction time to be 0.5-3 h, and the stirring linear velocity to be 2.0-4.0 m/s to obtain arsenic-containing high-concentration stock solution (4) and dearsenifying ore pulp;
(C) washing, namely adding the arsenic-removed ore pulp into a vacuum belt filter for filtering and washing, controlling the vacuum degree to be 0.03-0.06 MPa, the washing water pressure to be more than 0.3MPa and the washing water ratio to be 0.61-0.63, obtaining qualified copper concentrate (5) with the arsenic content of less than 0.05 wt.% and washing liquid, and extracting copper from the qualified copper concentrate (5) to a smelting plant;
(D) and (3) carrying out reduction precipitation, mixing the washing liquid with part of the arsenic-containing high-concentration stock solution (4), controlling the concentration of NaOH to be 50-100 g/L, adding thiourea dioxide to carry out reduction reaction, controlling the temperature of the reduction reaction to be 60-80 ℃, the reaction time to be 10-40 min and the concentration of the thiourea dioxide to be 0.3-1.0 g/L, filtering and washing the reacted slurry to obtain an arsenic-containing solution with the gold concentration lower than 0.05mg/L and gold-containing filter residue (7), and extracting gold from the gold-containing filter residue (7) in a smelting plant.
2. The method of claim 1, wherein said step (D) reduces the gold concentration of the precipitate to less than 0.05mgPerforming aeration neutralization on the/L arsenic-containing solution and the iron ore-containing acidic wastewater (8), and controlling the air amount to be 50-150 m3And h, adjusting the pH to 7-9 by using 30% lime milk (9), wherein the pH of the iron ore-containing mountain acidic wastewater (8) is 1.2-1.8, the concentration of Fe ions is 5-15 g/L, and controlling the proportion of the arsenic-containing solution and the iron ore-containing mountain acidic wastewater (8) to ensure that the mass ratio of Fe to As is more than 5, thereby obtaining the aeration-neutralized arsenic-containing solution.
3. The method as claimed in claim 2, characterized in that the aerated neutralized arsenic-containing solution is subjected to solid-liquid separation b, the separated sludge is subjected to thickening treatment to obtain overflow (10) and underflow (11), and the underflow (11) is pumped to a neutralized sludge storage for stockpiling.
4. A method according to claim 3, characterized in that a part of the overflow liquid (10) is returned to the leaching cycle of step (a) and another part is treated for standard discharge.
5. The method as set forth in claim 1, 3 or 4, characterized in that the other part of the arsenic-containing high-concentration raw liquor (4) obtained by the solid-liquid separation in the step (B) is mixed with a part of overflow liquor (10) obtained by the thickening treatment in the solid-liquid separation B, and is returned to the leaching in the step (A) to be reused as a solution for size mixing, and the other part is sent to the reduction precipitation in the step (D) to be used.
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| CN110468282B (en) * | 2019-09-20 | 2022-01-11 | 山西北方铜业有限公司 | Alkaline leaching dearsenification method for arsenic-containing material |
| CN115216628B (en) * | 2022-06-14 | 2023-09-22 | 云锡文山锌铟冶炼有限公司 | Method for removing copper and arsenic from copper-arsenic-containing acidic solution |
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| CN1027702C (en) * | 1992-05-16 | 1995-02-22 | 中国科学院化工冶金研究所 | Technology for removing and recoverying orpiment assenblende from metallurgical mine containing arsnide |
| CN102517452A (en) * | 2011-12-09 | 2012-06-27 | 紫金矿业集团股份有限公司 | Method for recovering gold from gold-containing tail liquid produced by gold-loaded carbon desorption and electrodeposition technology |
| CN102690950A (en) * | 2012-06-15 | 2012-09-26 | 紫金矿业集团股份有限公司 | Method for recycling gold from low-grade gold-containing tail liquid generated from gold-carrying carbon desorption-electrodeposition technology |
| CN103215453B (en) * | 2013-04-08 | 2015-03-11 | 山东国大黄金股份有限公司 | Method for treating waste residue by using arsenious wastewater in clean mode |
| CN103255289B (en) * | 2013-05-22 | 2015-04-22 | 昆明理工大学 | Method for removing arsenic matte by alkaline leaching at oxygen pressure and recovering arsenic |
| WO2017035675A1 (en) * | 2015-09-02 | 2017-03-09 | Molibdenos Y Metales S.A. | Method for removing arsenic from materials containing same |
| CN105439355B (en) * | 2015-12-28 | 2018-05-25 | 中南大学 | Waste acid resource reclaim and deep treatment method and device |
| CN107099669A (en) * | 2017-04-21 | 2017-08-29 | 昆明冶金研究院 | A kind of method containing high-efficiency cleaning arsenic removal in copper ashes |
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2018
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