CN112143883B - Method for reducing concentration of acid in gold concentrate roasting smelting purification waste acid - Google Patents
Method for reducing concentration of acid in gold concentrate roasting smelting purification waste acid Download PDFInfo
- Publication number
- CN112143883B CN112143883B CN202011039714.5A CN202011039714A CN112143883B CN 112143883 B CN112143883 B CN 112143883B CN 202011039714 A CN202011039714 A CN 202011039714A CN 112143883 B CN112143883 B CN 112143883B
- Authority
- CN
- China
- Prior art keywords
- acid
- flue gas
- gold
- carbon
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/10—Roasting processes in fluidised form
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- 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
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for reducing the concentration of acid in gold concentrate roasting, smelting and purifying waste acid, which comprises the steps of producing hydrogen sulfide waste gas, producing hydrogen cyanide waste gas, refining carbon-containing gold minerals, generating sulfur dioxide in flue gas, deoxidizing the flue gas to continuously produce the sulfur dioxide, and spraying and washing the flue gas to prepare acid. The method of the invention improves the utilization rate of sulfur, improves the yield of sulfuric acid products, reduces the corrosion of equipment and reduces the cost for neutralizing waste acid by monitoring the oxygen content in the roasting flue gas in real time, thereby ensuring the normal operation of the whole process flow.
Description
Technical Field
The invention relates to harmless treatment of smelting wastes, in particular to a method for reducing acid concentration of gold concentrate roasting, smelting and purifying waste acid.
Background
At present, the pretreatment process of the gold concentrate which contains arsenic, sulfur, copper and the like and is complex and difficult to treat mainly comprises the following steps: three basic process technologies of a roasting oxidation method, a pressure thermal oxidation method and a bacterial oxidation method. The roasting oxidation method is mainly used for pretreatment of gold concentrate containing sulfur, arsenic, copper, lead, zinc and carbon, and is based on that harmful components of gold-bearing minerals such as pyrite, arsenopyrite, chalcopyrite, organic carbon and the like are removed in a volatile mode under a high-temperature condition, other valuable metals mainly generate oxides or sulfates, the oxides or sulfates are remained in the roasted product, and the wrapped micro-fine-particle gold is fully exposed, so that the gold roasted product suitable for cyaniding and gold extraction is produced.
Although the oxidation roasting method is the main method for treating the complex gold concentrate at home and abroad at present, different requirements are required for the oxidation roasting of different types of complex gold ores, and the copper-containing gold concentrate adopts a first-stage high-temperature peroxide process, a sulfating roasting process and a second-stage roasting process. The flue gas containing arsenic trioxide, sulfur dioxide and mine dust produced in the oxidizing roasting process is subjected to gravity dust removal, electric dust removal, acid cleaning purification, electric demisting and secondary conversion and secondary absorption processes to produce a sulfuric acid product, and the waste acid containing impurities such as arsenic, fluorine and mine dust and having the sulfuric acid content of 10-30% is produced in the acid cleaning purification process. The generation of waste acid is mainly generated by the chemical reaction of sulfur trioxide in flue gas and water in the pickling purification process. And sulfur trioxide in the flue, when encountering water vapor and the temperature of the flue gas is lower than the Acid Dew Point (ADP), the two are combined to form sulfuric acid vapor, which has the following serious negative effects on the smelting process: 1. causing serious corrosion to subsequent smelting equipment (an air heat exchanger, dust removing equipment and a flue gas channel); 2. sulfur loss is caused, the utilization rate of sulfur in the acid making process is reduced, and the yield of sulfuric acid products is reduced; 3. waste acid is generated in the purification process, and the existing waste acid treatment method adopts a lime neutralization method, so that not only is the expensive production cost increased, but also the generated waste gypsum containing harmful metals is difficult to be comprehensively utilized, the economic benefit of an enterprise is influenced, and the healthy and sustained development of the enterprise is severely restricted; therefore, the reduction of the concentration of sulfur trioxide in the flue gas has great significance, developed countries such as foreign countries have already studied the sulfur trioxide in the flue gas for decades, while the research of China is mainly focused on the flue gas of a coal-fired power plant, and a better result is obtained aiming at the condition of the coal-fired power plant; however, no better method is provided for solving the problems of complex components and high concentrations of sulfur dioxide and sulfur trioxide in the roasting flue gas of gold smelting.
Chinese patent CN107144144A discloses a method for effectively inhibiting the generation of sulfur trioxide and waste acid in smelting flue gas, which relates to the inhibition of sulfur trioxide and waste acid in flue gas in an oxygen-enriched smelting process, and inhibits the generation of sulfur trioxide and waste acid in flue gas by adjusting the temperature, air leakage amount, water content and the like of the flue gas; however, the method only controls the actual parameters of metal smelting without considering from the view point of process parameters, and the inhibition effect of adjusting the process parameters is very little.
Chinese patent CN104841265A discloses a dry-type removal method for sulfur trioxide and heavy metals in non-ferrous smelting acid making flue gas, which is characterized in that after the heat is primarily recovered by a high-temperature waste heat boiler, the sulfur trioxide cannot be suppressed from the source through the capture of a dust removal device, and the problem of corrosion of a flue and the waste heat boiler cannot be solved.
Disclosure of Invention
The invention provides a method for reducing the acid concentration of gold concentrate roasting smelting purification waste acid, aiming at the problem of low treatment efficiency of the existing smelting waste acid, and the method comprises the following steps:
1) producing hydrogen sulfide waste gas
Precipitating and acidifying the acidic copper extraction raffinate produced by the gold concentrate roasting, acid leaching and extracting process by using a sulfur-containing precipitator, and acidifying to generate hydrogen sulfide waste gas;
2) producing hydrogen cyanide waste gas
Acidifying cyanide barren solution produced by a cyanide gold extraction process by using sulfuric acid, wherein hydrogen cyanide waste gas is produced in the acidification process;
3) refining of carbon-containing gold minerals
Grinding carbon-containing gold mineral with Raymond mill to obtain component with particle size of-400 meshes 90-92 wt%;
4) formation of sulfur dioxide
In the roasting and smelting process of the sulfur-containing and arsenic-containing gold concentrate, the temperature of flue gas in the roasting stage is controlled to be 500-;
5) removing oxygen
Blowing the carbon-containing gold mineral refined in the step 3) into a flue gas uptake flue by using high-pressure air, wherein the carbon-containing gold mineral flows in a reverse direction with the flue gas, and oxygen in the flue gas is consumed by burning carbon, so that sulfur trioxide in the flue gas continuously reacts in a direction of generating sulfur dioxide;
6) acid cleaning and purifying
The wet purification process is adopted to carry out spray washing on the flue gas to prepare acid.
In the method, the steps 1) to 3) are not separated in sequence. In the step 1), the sulfur-containing precipitator is one of sodium sulfide, ferrous sulfide or sodium hydrosulfide. In the step 3), the carbon-containing gold mineral contains 20-90 wt% of carbon, 30-100g/t of gold, 300g/t of silver and 1000g/t of water, and the water content is less than or equal to 5 wt%. In step 6), the flue gas is firstly cooled to 60-70 ℃ in an adiabatic way.
The process principle of the invention is as follows: 1. according to Gibbs free energy, the oxidation reaction of sulfur dioxide and sulfur trioxide is a reversible reaction and an exothermic reaction, and when the temperature rises, the reaction balance can move in the reverse direction, namely the generation of sulfur trioxide is reduced; when the temperature is lower than 400 ℃, the reaction rate of generating sulfur trioxide is reduced, so that the effect of inhibiting the generation of sulfur trioxide is achieved; 2. oxygen is a necessary condition for generating sulfur trioxide by oxidizing sulfur dioxide, so that oxygen in the flue gas is removed, and the generation of sulfur trioxide is inhibited; 3. the hydrogen sulfide waste gas, the hydrogen cyanide waste gas and the carbon-containing gold mineral are used as reducing agents of oxygen and sulfur trioxide in the flue gas, so that the concentration of the sulfur dioxide in the flue gas is increased, the generation of waste acid by the synthesis of the sulfur trioxide and water in the pickling purification process is restrained from the source, and the acid concentration of the waste acid is obviously reduced.
The method comprises the steps of monitoring the oxygen content in roasting flue gas in real time, enabling hydrogen sulfide waste gas, hydrogen cyanide waste gas and carbon-containing gold minerals to enter the flue gas in a spraying mode after the oxygen content reaches a preset value, and consuming the oxygen in the flue gas through reaction with the oxygen; when the oxygen concentration is reduced, the reaction of generating sulfur trioxide is reversely carried out, the utilization rate of sulfur is finally improved, the yield of sulfuric acid products is improved, the corrosion of equipment is reduced, the cost for neutralizing waste acid is reduced, and the normal operation of the whole process flow is further ensured.
Detailed Description
The present invention is described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
Example 1
A method for reducing the concentration of acid in gold concentrate roasting, smelting and purifying waste acid comprises the following steps:
1. production of hydrogen sulfide off-gas: the acid copper extraction raffinate produced by the gold concentrate roasting, acid leaching and extracting process contains a certain amount of impurity ions such as copper, zinc, arsenic and the like, soluble sulfides such as sodium sulfide, ferrous sulfide, sodium hydrosulfide and the like are used as chemical precipitating agents of the acid copper extraction raffinate, and a certain amount of hydrogen sulfide waste gas is produced along with the reaction process with acid while the precipitation reaction is carried out, wherein the content of the hydrogen sulfide reaches 8%;
2. production of hydrogen cyanide off-gas: the gold smelting is carried out by directly cyaniding and gold extracting process and cyaniding barren solution and cyaniding tailings produced by roasting, cyaniding and gold extracting process, wherein the barren solution cyaniding is treated by sulfuric acid acidification method, the solution after acidification is recycled after pH value adjustment, and hydrogen cyanide waste gas is produced in acidification; the cyaniding tailings are acidized by sulfuric acid, the cyanide content of the tailings after acidizing reaches the general solid waste standard, and hydrogen cyanide waste gas is produced in the acidizing process, so that the hydrogen cyanide content reaches 8%;
3. carbon-containing gold mineral (or waste activated carbon after gold desorption): 20% of carbon, 30g/t of gold and 300g/t of silver, and grinding the carbon-containing gold mineral with the moisture content of 5% by a Raymond mill to obtain 90% of the granularity of-400 meshes;
4. in the roasting and smelting process of the sulfur-containing and arsenic-containing gold concentrate, the temperature of flue gas in the roasting stage is controlled to be 500 ℃ when the flue gas comes out of a fluidized bed roaster, the flue gas enters a furnace gas cooler through an ascending flue, hydrogen sulfide waste gas and hydrogen cyanide waste gas are conveyed into a flue gas ascending pipeline through different pipelines, the hydrogen sulfide waste gas and the hydrogen cyanide waste gas are subjected to oxidation reaction with residual oxygen in the flue gas to generate sulfur dioxide gas, meanwhile, sulfur trioxide in the flue gas is subjected to reduction reaction to generate sulfur dioxide, the volume ratio of oxygen in the flue gas is reduced from 3% to 1%, and the content of sulfur trioxide in the furnace gas is reduced from about 2% to 1.0%;
5. high-pressure air is adopted to continuously blow carbon-containing gold minerals to a smoke ascending flue through a material gun, the powdery carbon-containing gold minerals and smoke flow in a reverse direction, oxygen in the smoke is consumed by carbon combustion in the process, and then the oxygen content in the smoke is reduced, so that sulfur trioxide in the smoke is subjected to a reverse reaction for generating sulfur dioxide through reduction; the addition amount of the carbon-containing gold mineral is adjusted to be 0.3 ton/h through detection, the volume ratio of oxygen in the flue gas is reduced to 0.2%, and the volume ratio of sulfur trioxide is reduced to 0.12%;
6. acid washing and purifying: the acid making and purifying process adopts a wet purification process, furnace gas from an electric dust collector enters an empty tower and a filler washing tower of a purification section, the furnace gas is sprayed and washed, the furnace gas is adiabatically cooled to 60 ℃, harmful impurities such as mineral dust, arsenic, fluorine and the like in the furnace gas are removed, sulfur trioxide in the furnace gas is also removed in the process, the flue gas after the step 5 is subjected to an acid washing and purifying process, and the concentration of the produced waste acid is reduced to 1% from 10%.
Example 2
A method for reducing the concentration of acid in gold concentrate roasting, smelting and purifying waste acid comprises the following steps:
1. production of hydrogen sulfide off-gas: the acid copper extraction raffinate produced by the gold concentrate roasting, acid leaching and extracting process contains a certain amount of impurity ions such as copper, zinc, arsenic and the like, soluble sulfides such as sodium sulfide, ferrous sulfide, sodium hydrosulfide and the like are used as chemical precipitating agents of the acid copper extraction raffinate, and a certain amount of hydrogen sulfide waste gas is produced along with the reaction process with acid while the precipitation reaction is carried out, wherein the content of the hydrogen sulfide reaches 9%;
2. production of hydrogen cyanide off-gas: the gold smelting is carried out by directly cyaniding and gold extracting process and cyaniding barren solution and cyaniding tailings produced by roasting, cyaniding and gold extracting process, wherein the barren solution cyaniding is treated by sulfuric acid acidification method, the solution after acidification is recycled after pH value adjustment, and hydrogen cyanide waste gas is produced in acidification; the cyaniding tailings are acidized by sulfuric acid, the cyanide content of the tailings after acidizing reaches the general solid waste standard, and hydrogen cyanide waste gas is produced in the acidizing process, so that the hydrogen cyanide content reaches 9%;
3. carbon-containing gold mineral (or waste activated carbon after gold desorption): 55% of carbon, 65g/t of gold and 650g/t of silver, and grinding the carbon-containing gold mineral with the moisture content of 4% by a Raymond mill to obtain 91% of granularity of-400 meshes;
4. in the roasting and smelting process of the sulfur-containing and arsenic-containing gold concentrate, the temperature of flue gas in the roasting stage is controlled to be 600 ℃ when the flue gas comes out of a fluidized bed roaster, the flue gas enters a furnace gas cooler through an ascending flue, hydrogen sulfide waste gas and hydrogen cyanide waste gas are conveyed to a flue gas ascending pipeline through different pipelines, the hydrogen sulfide waste gas and the hydrogen cyanide waste gas are subjected to oxidation reaction with residual oxygen in the flue gas to generate sulfur dioxide gas, meanwhile, sulfur trioxide in the flue gas is subjected to reduction reaction to generate sulfur dioxide, the volume ratio of oxygen in the flue gas is reduced from 3% to 1.25%, and the content of sulfur trioxide in the furnace gas is reduced from about 2% to 1.15%;
5. high-pressure air is adopted to continuously blow carbon-containing gold minerals to a smoke ascending flue through a material gun, the powdery carbon-containing gold minerals and smoke flow in a reverse direction, oxygen in the smoke is consumed by carbon combustion in the process, and then the oxygen content in the smoke is reduced, so that sulfur trioxide in the smoke is subjected to a reverse reaction for generating sulfur dioxide through reduction; the addition amount of the carbon-containing gold mineral is adjusted to be 0.4 ton/h through detection, the volume ratio of oxygen in the flue gas is reduced to 0.25%, and the volume ratio of sulfur trioxide is reduced to 0.13%;
6. acid washing and purifying: the acid making and purifying process adopts a wet purification process, furnace gas from an electric dust collector enters a purification section empty tower and a filler washing tower, the furnace gas is sprayed and washed, the furnace gas is adiabatically cooled to 65 ℃, harmful impurities such as mineral dust, arsenic, fluorine and the like in the furnace gas are removed, sulfur trioxide in the furnace gas is also removed in the process, the flue gas after the step 5 is subjected to an acid washing and purifying process, and the concentration of the produced waste acid is reduced to 1.5 percent from 15 percent.
Example 3
A method for reducing the concentration of acid in gold concentrate roasting, smelting and purifying waste acid comprises the following steps:
1. production of hydrogen sulfide off-gas: the acid copper extraction raffinate produced by the gold concentrate roasting, acid leaching and extracting process contains a certain amount of impurity ions such as copper, zinc, arsenic and the like, soluble sulfides such as sodium sulfide, ferrous sulfide, sodium hydrosulfide and the like are used as chemical precipitating agents of the acid copper extraction raffinate, and a certain amount of hydrogen sulfide waste gas is produced along with the reaction process with acid while the precipitation reaction is carried out, wherein the content of the hydrogen sulfide reaches 10%;
2. production of hydrogen cyanide off-gas: the gold smelting is carried out by directly cyaniding and gold extracting process and cyaniding barren solution and cyaniding tailings produced by roasting, cyaniding and gold extracting process, wherein the barren solution cyaniding is treated by sulfuric acid acidification method, the solution after acidification is recycled after pH value adjustment, and hydrogen cyanide waste gas is produced in acidification; the cyaniding tailings are acidized by sulfuric acid, the cyanide content of the tailings after acidizing reaches the general solid waste standard, and hydrogen cyanide waste gas is produced in the acidizing process, so that the hydrogen cyanide content reaches 10%;
3. carbon-containing gold mineral (or waste activated carbon after gold desorption): carbon content is 90%, gold content is 100g/t, silver content is 1000g/t, carbon-containing gold mineral with water content of 3% is ground by Raymond mill, and granularity reaches-400 meshes and accounts for 92%;
4. in the roasting and smelting process of the sulfur-containing and arsenic-containing gold concentrate, the temperature of flue gas in the roasting stage is controlled to be 700 ℃ when the flue gas comes out of a fluidized bed roaster, the flue gas enters a furnace gas cooler through an ascending flue, hydrogen sulfide waste gas and hydrogen cyanide waste gas are conveyed into a flue gas ascending pipeline through different pipelines, the hydrogen sulfide waste gas and the hydrogen cyanide waste gas are subjected to oxidation reaction with residual oxygen in the flue gas to generate sulfur dioxide gas, meanwhile, sulfur trioxide in the flue gas is subjected to reduction reaction to generate sulfur dioxide, the volume ratio of oxygen in the flue gas is reduced from 3% to 1.5%, and the content of sulfur trioxide in the furnace gas is reduced from about 2% to 1.3%;
5. high-pressure air is adopted to continuously blow carbon-containing gold minerals to a smoke ascending flue through a material gun, the powdery carbon-containing gold minerals and smoke flow in a reverse direction, oxygen in the smoke is consumed by carbon combustion in the process, and then the oxygen content in the smoke is reduced, so that sulfur trioxide in the smoke is subjected to a reverse reaction for generating sulfur dioxide through reduction; the addition amount of the carbon-containing gold mineral is adjusted to be 0.5 ton/h through detection, the volume ratio of oxygen in the flue gas is reduced to 0.3%, and the volume ratio of sulfur trioxide is reduced to 0.15%;
6. acid washing and purifying: the acid making and purifying process adopts a wet purification process, furnace gas from an electric dust collector enters a purification section empty tower and a filler washing tower, the furnace gas is sprayed and washed, the furnace gas is adiabatically cooled to 70 ℃, harmful impurities such as mineral dust, arsenic, fluorine and the like in the furnace gas are removed, sulfur trioxide in the furnace gas is also removed in the process, the flue gas after the step 5 is subjected to an acid washing and purifying process, and the concentration of the produced waste acid is reduced to 2 percent from 20 percent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A method for reducing the concentration of acid in gold concentrate roasting, smelting and purifying waste acid is characterized by comprising the following steps:
1) producing hydrogen sulfide waste gas
Precipitating and acidifying the acidic copper extraction raffinate produced by the gold concentrate roasting, acid leaching and extracting process by using a sulfur-containing precipitator, and acidifying to generate hydrogen sulfide waste gas;
2) producing hydrogen cyanide waste gas
Acidifying cyanide barren solution produced by a cyanide gold extraction process by using sulfuric acid, wherein hydrogen cyanide waste gas is produced in the acidification process;
3) refining of carbon-containing gold minerals
Grinding carbon-containing gold mineral with Raymond mill to obtain component with particle size of-400 meshes 90-92 wt%;
4) formation of sulfur dioxide
In the roasting and smelting process of the sulfur-containing and arsenic-containing gold concentrate, the temperature of flue gas in the roasting stage is controlled to be 500-;
5) removing oxygen
Blowing the carbon-containing gold mineral refined in the step 3) into a flue gas uptake flue by using high-pressure air, wherein the carbon-containing gold mineral flows in a reverse direction with the flue gas, and oxygen in the flue gas is consumed by burning carbon, so that sulfur trioxide in the flue gas continuously reacts in a direction of generating sulfur dioxide;
6) acid cleaning and purifying
The wet purification process is adopted to carry out spray washing on the flue gas to prepare acid.
2. The method according to claim 1, wherein steps 1) -3) are not consecutive.
3. The method of claim 1 or 2, wherein in step 1), the sulfur-containing precipitant is one of sodium sulfide, ferrous sulfide, or sodium hydrosulfide.
4. The method as claimed in claim 1 or 2, wherein in step 3), the carbon-containing gold mineral contains 20-90 wt% of carbon, 30-100g/t of gold, 300g/t of silver and less than or equal to 5 wt% of water.
5. A method according to claim 1 or 2, characterized in that in step 6) the flue gases are cooled adiabatically to 60-70 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039714.5A CN112143883B (en) | 2020-09-28 | 2020-09-28 | Method for reducing concentration of acid in gold concentrate roasting smelting purification waste acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039714.5A CN112143883B (en) | 2020-09-28 | 2020-09-28 | Method for reducing concentration of acid in gold concentrate roasting smelting purification waste acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112143883A CN112143883A (en) | 2020-12-29 |
| CN112143883B true CN112143883B (en) | 2021-12-14 |
Family
ID=73895715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011039714.5A Active CN112143883B (en) | 2020-09-28 | 2020-09-28 | Method for reducing concentration of acid in gold concentrate roasting smelting purification waste acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112143883B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2330075A1 (en) * | 2009-12-01 | 2011-06-08 | Bayer Technology Services GmbH | Method for making sulphuric acid |
| CN107841622A (en) * | 2017-11-10 | 2018-03-27 | 陈鹏 | A kind of method of cyanidation tailings comprehensive utilization and harmless treatment |
| CN108905594A (en) * | 2018-09-14 | 2018-11-30 | 东北大学 | A kind of method of sulfur trioxide concentration in inhibition smelting lead |
| CN108913875A (en) * | 2018-07-20 | 2018-11-30 | 东北大学 | A kind of mill leaching pretreating process of difficult-treating gold mine |
-
2020
- 2020-09-28 CN CN202011039714.5A patent/CN112143883B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2330075A1 (en) * | 2009-12-01 | 2011-06-08 | Bayer Technology Services GmbH | Method for making sulphuric acid |
| CN107841622A (en) * | 2017-11-10 | 2018-03-27 | 陈鹏 | A kind of method of cyanidation tailings comprehensive utilization and harmless treatment |
| CN108913875A (en) * | 2018-07-20 | 2018-11-30 | 东北大学 | A kind of mill leaching pretreating process of difficult-treating gold mine |
| CN108905594A (en) * | 2018-09-14 | 2018-11-30 | 东北大学 | A kind of method of sulfur trioxide concentration in inhibition smelting lead |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112143883A (en) | 2020-12-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110331300A (en) | A kind of method of Copper making industry waste acid and the comprehensive extraction arsenic of flue dust | |
| CN101343686B (en) | Comprehensive utilization method for copper containing ferro-sulphur ore | |
| CN110090548B (en) | Method for wet desulphurization and zinc sulfate recovery of copper slag tailings and zinc smelting fly ash | |
| CN103924091A (en) | Smelting method for removing fluorine and chlorine out of fluorine-and-chlorine-containing inferior zinc oxide and enriching valuable metals | |
| CN107445209A (en) | Remove the method that manganous dithionate prepares saturation manganese sulfate slurries and manganese sulfate in pyrolusite pulp leachate | |
| CN109534476A (en) | A kind of method that copper ashes handles arsenic in nonferrous smelting waste acid | |
| CN113088708A (en) | Method for recycling polymetallic through resource synergistic treatment of copper smelting white smoke and dirty acid | |
| CN103215438A (en) | Process for improving arsenic gold concentrate roasting arsenic and sulfur removal rate | |
| CN105331801B (en) | A kind of zinc concentrate cooperates with method of roasting with pyrite | |
| CN105399182B (en) | A kind of method for efficiently removing heavy metal in waste acid | |
| CN111349790B (en) | Method for reducing arsenic content in copper smelting soot leaching slag | |
| CN111996383A (en) | Method for separating arsenic from copper slag by matching high-arsenic materials | |
| CN110170241B (en) | Method for inhibiting generation of sulfur trioxide in heavy non-ferrous metal smelting acid-making flue gas | |
| CN103332750B (en) | Manganese oxide ore selective reduction method | |
| CN109364735B (en) | Method for reducing sulfur trioxide in nonferrous smelting flue gas by using metal sulfide | |
| CN112143883B (en) | Method for reducing concentration of acid in gold concentrate roasting smelting purification waste acid | |
| CN212983028U (en) | Device for recovering arsenic from high-arsenic smoke dust | |
| CN109136585B (en) | Method for inhibiting generation of sulfur trioxide in high-temperature flue gas in copper smelting process | |
| CN113025821A (en) | Comprehensive treatment method for resource utilization of cyanidation tailings | |
| CN110983030B (en) | Method for co-processing zinc-rich gypsum slag and jarosite slag | |
| CN101403041A (en) | Method for removing arsenic sulphur elements in golden ore concentrate hard to treat | |
| CN108905594B (en) | Method for inhibiting concentration of sulfur trioxide in lead smelting flue gas | |
| CN1273389C (en) | Method of preparing manganese sulphate using gray manganese ore and dialozite to adsorb sulfur dioxide waste gas | |
| AU2010205521B2 (en) | Metal recovery from metallurgical waste by chloridising | |
| CN110937579A (en) | Method for recovering waste desulfurizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |