CN105936976B - A kind of technology with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat - Google Patents
A kind of technology with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat Download PDFInfo
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- CN105936976B CN105936976B CN201610388729.XA CN201610388729A CN105936976B CN 105936976 B CN105936976 B CN 105936976B CN 201610388729 A CN201610388729 A CN 201610388729A CN 105936976 B CN105936976 B CN 105936976B
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- 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
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- 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
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G28/00—Compounds of arsenic
- C01G28/005—Oxides; Hydroxides; Oxyacids
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- 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
- C22B11/08—Obtaining noble metals by cyaniding
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Metallurgy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of technologies with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat, the technical matters includes that complicated golden ore concentrate hard to treat is placed in industrial microwave oven to pave, open microwave oven fan, it is passed through air, start microwave heating equipment, complicated golden ore concentrate hard to treat is successively dried and roasted, gained flue gas is sent into recovery system and recycles As2O3 and SO2, arsenic and sulfuric acid are produced, the hot Gold Concentrate under Normal Pressure of gained is sent to Cyanide Leaching system and recycles the valuable metals such as gold and silver.According to the technical matters can increase substantially gold leaching rate, and it is easily operated, technological process is short, reduces reaction temperature and time, improve production efficiency.
Description
Technical field
The present invention relates to a kind of technologies with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat, belong to gold smelting
Industry field.
Background technology
With the development of gold industry, substantially totally, Exploitation Scope is by the easy of single property for domestic disposable gold mine
Gold resource is managed, high arsenic, high-carbon, low-sulfur have been rapidly developed and contains polymetallic difficult-treating gold mine resources domain, gold is in mine
In stone occurrence status be mainly in gold-carrying minerals in dispersity gold, in colloidal gold, in Lattice Gold or solid solution gold.It is difficult
Handle mispickel (FeAsS) and pyrite (FeS in Gold Concentrate under Normal Pressure2) it is main gold-carrying minerals, gold is usually with microfine or micro- shape
State package wherein or dip dyeing in crystal.Using conventional cyaniding gold-extracting method, golden direct leaching rate generally 80% with
Under, or even some only up to 10%~30%.The method for handling this kind of Gold Concentrate under Normal Pressure at present mainly has oxidation roasting method, pressure oxidation
Method, biological oxidation process, pressurized catalysis oxidation acid leaching method etc..A few class methods there are high energy consumption, environmental pollution, to equipment requirement
The disadvantages such as height, production cost are high, production capacity is low.
Invention content
It is an object of the invention to be directed to the problems of in the prior art, propose a kind of multiple with industrial Microwave Pretreatment
The technology of miscellaneous golden ore concentrate hard to treat.
The technical scheme is that realized by following steps：
Complicated golden ore concentrate hard to treat is laid in continous way horizontal belt industrial microwave oven by the first step, seam thickness 25
~100mm opens microwave oven fan, is passed through air, makes to form tiny structure in micro-wave oven；
Second step starts microwave heating equipment, and microwave frequency is set as 300MHz~300GHz, and pressure is set as
0.075MPa~0.105MPa, microwave source single tube power magnitude is 1kW, 3kW, 5kW, 10kW, 20kW, 30kW or 50kW, to the
Complicated golden ore concentrate hard to treat obtained by one step is successively dried and is roasted, and wherein drying section temperature control is 120 DEG C~200 DEG C,
Drying time is 5~20 minutes；Furnace zone temperature control is 400 DEG C~600 DEG C, and the roasting volatilization time is 10~30 minutes, even
It is continuous to obtain volatilization flue gas and hot Gold Concentrate under Normal Pressure；
Gained volatilization flue gas in second step is sent into recovery system and recycles As by third step2O3And SO2, produce arsenic and sulfuric acid；
The hot Gold Concentrate under Normal Pressure of gained in second step is sent to Cyanide Leaching system and recycles the valuable metals such as gold and silver by the 4th step.
Further, the microwave frequency is set as 915MHz or 2450MHz.
Further, the furnace zone temperature control is 400 DEG C~449 DEG C.
Further, the industrial microwave oven is continous way horizontal belt industrial microwave oven.
Complicated golden ore concentrate hard to treat is pre-processed according to the technical matters, there is selectivity plus thermal property using microwave, make
Thermal stress is generated between various mineral in Gold Concentrate under Normal Pressure, causes to generate crack on the interface between mineral, has effectively facilitated useful mine
The monomer dissociation of object and effective affecting acreage is increased, promotes difficult complicated golden ore concentrate that chemical reaction or phase transition occurs,
Difficult complicated golden ore concentrate is promoted to decompose oxidation.The technical matters flow is short, equipment simply according to and it is easily operated, pass through high intensity
Microwave electromagnetic field action can significantly reduce physical reaction activation energy, improve thermodynamics of reactions and dynamic conditions, when microwave radiation
Between only need 3min~30min, it is lower 2h than conventional roasting 2h~2.5h, improve production efficiency；Microwave penetration material is simultaneously straight with it
Coupling is connect, realizes that mineral of the same race are integrally quickly heated without gradient, microwave radiation temperature only needs 400 DEG C~600 DEG C, than conventional roasting
550 DEG C~750 DEG C low 150 DEG C~200 DEG C；Gold, silver conventional cyanidation leaching rate respectively reaches 98% and 60% or more.
Description of the drawings：The concrete structure of the present invention is provided by drawings and examples below：
Fig. 1 is gold and silver leaching rate and microwave radiation calcination temperature graph of relation
Fig. 2 is gold and silver leaching rate and microwave radiation roasting time graph of relation
Fig. 3 is a kind of technology flow diagram with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat.
Specific implementation mode：The present invention is not limited by following embodiments, can according to the technique and scheme of the present invention with reality
Situation determines specific embodiment.
Embodiment 1：A kind of technology with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat, the technical matters are pressed
Following steps carry out：Complicated golden ore concentrate hard to treat is placed in continous way horizontal belt industrial microwave oven and paved by the first step, and ore bed is thick
Degree is 25~100mm, opens microwave oven fan, is passed through air；Second step starts microwave heating equipment, to complicated obtained by the first step
Golden ore concentrate hard to treat is successively dried and is roasted, and wherein drying section microwave frequency control is 915MHz, microwave source single tube power
Magnitude is 3kW, 5kW, and the control of drying section temperature is 120 DEG C~140 DEG C, and drying time is 5~10 minutes；Furnace zone microwave frequency
Control is 915MHz, and microwave source single tube power magnitude is 10kW, 20kW, and furnace zone temperature control is 400 DEG C~500 DEG C, roasting
The volatilization time is 10~15 minutes, and the control of industrial microwave oven pressure is 0.105MPa, is continuously available volatilization flue gas and hot Gold Concentrate under Normal Pressure；
Gained volatilization flue gas in second step is sent into recovery system and recycles As by third step2O3And SO2, produce arsenic and sulfuric acid；4th step will
The hot Gold Concentrate under Normal Pressure of gained, which is sent to Cyanide Leaching system, in second step recycles the valuable metals such as gold and silver.
NaCN dosage 8.0kg/t when above-mentioned steps (4) Cyanide Leaching, extraction temperature room temperature, pulp density 30%, pH value
10.5, extraction time is for 24 hours.According to above-mentioned process conditions, the leaching rate of Jin Heyin is respectively 97% and 58%.
Embodiment 2：A kind of technology with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat, the technical matters are pressed
Following steps carry out：Complicated golden ore concentrate hard to treat is placed in continous way horizontal belt industrial microwave oven and paved by the first step, and ore bed is thick
Degree is 25~100mm, opens microwave oven fan, is passed through air；Second step starts microwave heating equipment, to complicated obtained by the first step
Golden ore concentrate hard to treat is successively dried and is roasted, and wherein drying section microwave frequency control is 915MHz, microwave source single tube power
Magnitude is 5kW, 10kW, and the control of drying section temperature is 140 DEG C~160 DEG C, and drying time is 10~15 minutes；Furnace zone Microwave Frequency
Rate control is 915MHz, and microwave source single tube power magnitude is 20kW, 30kW, and furnace zone temperature control is 500 DEG C~550 DEG C, roasting
It is 15~20 minutes to burn the volatilization time, and the control of industrial microwave oven pressure is 0.09MPa, is continuously available volatilization flue gas and hot aurin
Mine；Gained volatilization flue gas in second step is sent into recovery system and recycles As by third step2O3And SO2, produce arsenic and sulfuric acid；4th
The hot Gold Concentrate under Normal Pressure of gained in second step is sent to Cyanide Leaching system and recycles the valuable metals such as gold and silver by step.
NaCN dosage 8.0kg/t when above-mentioned steps (4) Cyanide Leaching, extraction temperature room temperature, pulp density 30%, pH value
10.5, extraction time is for 24 hours.According to above-mentioned process conditions, the leaching rate of Jin Heyin is respectively 99% and 60%.
Embodiment 3：A kind of technology with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat, the technical matters are pressed
Following steps carry out：Complicated golden ore concentrate hard to treat is placed in continous way horizontal belt industrial microwave oven and paved by the first step, and ore bed is thick
Degree is 25~100mm, opens microwave oven fan, is passed through air；Second step starts microwave heating equipment, to complicated obtained by the first step
Golden ore concentrate hard to treat is successively dried and is roasted, and wherein drying section microwave frequency control is 2450MHz, microwave source single tube power
Magnitude is 1kW, 5kW, and the control of drying section temperature is 160 DEG C~200 DEG C, and drying time is 15~20 minutes；Furnace zone Microwave Frequency
Rate control is 2450MHz, and microwave source single tube power magnitude is 50kW, and furnace zone temperature control is 550 DEG C~600 DEG C, and roasting is waved
It is 20~25 minutes to send out the time, and the control of industrial microwave oven pressure is 0.075MPa, is continuously available volatilization flue gas and hot Gold Concentrate under Normal Pressure；The
Gained volatilization flue gas in the first step is sent into recovery system and recycles As by three steps2O3And SO2, produce arsenic and sulfuric acid；4th step is by
The hot Gold Concentrate under Normal Pressure of gained, which is sent to Cyanide Leaching system, in two steps recycles the valuable metals such as gold and silver.
NaCN dosage 8.0kg/t when above-mentioned steps (4) Cyanide Leaching, extraction temperature room temperature, pulp density 30%, pH value
10.5, extraction time is for 24 hours.According to above-mentioned process conditions, the leaching rate of Jin Heyin is respectively 99.5% and 61%.
The above technical characteristic constitutes highly preferred embodiment of the present invention, is imitated with stronger adaptability and best implementation
Fruit can increase and decrease non-essential technical characteristic, to meet the needs of different situations according to actual needs.
Claims (1)
1. a kind of technique with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat, it is characterised in that include the following steps：
Complicated golden ore concentrate hard to treat is laid in continous way horizontal belt industrial microwave oven by the first step, seam thickness be 25~
100mm opens microwave oven fan, is passed through air, makes to form tiny structure in micro-wave oven；
Second step starts microwave heating equipment, and complicated golden ore concentrate hard to treat obtained by the first step is successively dried and roasted,
Middle drying section microwave frequency control is 2450MHz, and microwave source single tube power magnitude is 1kW, 5kW, and the control of drying section temperature is 160
DEG C~200 DEG C, drying time is 15~20 minutes；The control of furnace zone microwave frequency is 2450MHz, microwave source single tube power magnitude
For 50kW, furnace zone temperature control is 550 DEG C~600 DEG C, and the roasting volatilization time is 20~25 minutes, industrial microwave oven pressure control
It is made as 0.075MPa, is continuously available volatilization flue gas and hot Gold Concentrate under Normal Pressure；
Gained volatilization flue gas in second step is sent into recovery system and recycles As by third step2O3And SO2, produce arsenic and sulfuric acid；
The hot Gold Concentrate under Normal Pressure of gained in second step is sent to Cyanide Leaching system and recycles gold and silver valuable metal by the 4th step, when Cyanide Leaching
NaCN dosage 8.0kg/t, extraction temperature room temperature, pulp density 30%, pH value 10.5, extraction time is for 24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610388729.XA CN105936976B (en) | 2016-06-03 | 2016-06-03 | A kind of technology with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat |
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| CN201610388729.XA CN105936976B (en) | 2016-06-03 | 2016-06-03 | A kind of technology with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat |
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| CN105936976A CN105936976A (en) | 2016-09-14 |
| CN105936976B true CN105936976B (en) | 2018-07-27 |
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| CN108455668B (en) * | 2018-03-30 | 2020-01-07 | 江苏宝钢精密钢丝有限公司 | Green resource utilization method of arsenic-containing waste acid |
| CN110747355B (en) * | 2019-10-22 | 2021-06-15 | 山东恒邦冶炼股份有限公司 | Process and equipment for preparing metal arsenic from crude white arsenic |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225467A (en) * | 2008-02-25 | 2008-07-23 | 沈阳理工大学 | Method for pretreating refractory gold ore by employing microwave calcining |
| CN102758080A (en) * | 2012-07-25 | 2012-10-31 | 福建省双旗山矿业有限责任公司 | Method for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral |
| CN102758079A (en) * | 2012-07-25 | 2012-10-31 | 福建省双旗山矿业有限责任公司 | Energy-saving optimizing technology for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral |
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- 2016-06-03 CN CN201610388729.XA patent/CN105936976B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225467A (en) * | 2008-02-25 | 2008-07-23 | 沈阳理工大学 | Method for pretreating refractory gold ore by employing microwave calcining |
| CN102758080A (en) * | 2012-07-25 | 2012-10-31 | 福建省双旗山矿业有限责任公司 | Method for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral |
| CN102758079A (en) * | 2012-07-25 | 2012-10-31 | 福建省双旗山矿业有限责任公司 | Energy-saving optimizing technology for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral |
Non-Patent Citations (2)
| Title |
|---|
| 微波焙烧预处理难浸金矿物;魏莉 等;《过程工程学报》;20090630;第9卷;第56-59页 * |
| 难浸金矿石预处理新工艺--微波焙烧;魏莉 等;《黄金》;20031231;第24卷(第12期);第29-30页 * |
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Effective date of registration: 20210126 Address after: 834506 Baogutu, Miaoergou Town, Tuoli County, Tacheng Prefecture, Xinjiang Uygur Autonomous Region Patentee after: Tuoli Zhaojin Beijiang Mining Co.,Ltd. Address before: 834506 Baogutu, Miaoergou Town, Tuoli County, Tacheng Prefecture, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG XINGTA MINING Co.,Ltd. |
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Granted publication date: 20180727 Termination date: 20210603 |
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