CN1227268A - Gold-extracting cyanidation process decomposing primary gold ore in temperature controlling and oxygen admixing gas burning pyrolysis furnace - Google Patents
Gold-extracting cyanidation process decomposing primary gold ore in temperature controlling and oxygen admixing gas burning pyrolysis furnace Download PDFInfo
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Abstract
The present invention relates to gold extracting technology. High-temperature fuel gas produced by coal burning furnace after replenishing air and pre-cooling to 450-850 deg.C is introduced as pyrolysis gas into pyrolysis furnace to pyrolyze and oxidation decomposing primary gold ore into gold ore chamotte. The gold ore chamotte is crushed and soaked with sodium cyanide in cyanidation bath to extract gold. The waste gas after pyrolyzing gold ore is fed to waste gas purifying section, where lime powder is added to convert SO2 and As2O3 in the waste gas into calcium sulfite and calcium arsenite to be filtered as insoluble solid, and then the waste gas is exhausted to atmosphere.
Description
The invention relates to a gold extraction process, in particular to a gold extraction process by cyanidationmethod for decomposing primary gold ore in a temperature-controlled oxygen-doped gas pyrolysis furnace.
Cyanidation is known to be an economically efficient and widely used method for extracting gold from gold-bearing ores. However, cyanidation cannot directly treat the primary gold ore. The current method for industrially treating primary gold ore is to perform flotation enrichment, decompose gold concentrate by a fluidized bed roaster and then extract gold by cyanidation. Although effective, this approach is complex and capital intensive.
The invention aims to: provides a new process for directly treating primary gold ores without mineral separation and enrichment.
Structure of the inventionThe composition is as follows: (1) high-temperature fuel gas generated by a combustion furnace is mixed with oxygen and is pre-cooled to 450-850 ℃ to be used as pyrolysis gas, the pyrolysis gas is introduced into a pyrolysis furnace to carry out thermal decomposition and oxidative decomposition on primary gold ores in the furnace, so that the primary gold ores are converted into gold ore clinker, gold ore clinker is crushed to-5 mm, the gold ore clinker is put into a cyanidation tank and is soaked in sodium cyanide solution for gold extraction, the process is the same as the cyanidation gold extraction process of common oxidation type gold ores, 2, a cooling method combining jacket water cooling and direct air mixing with the fuel gas is adopted for cooling the fuel gas, so that the temperature of the pyrolysis gas can be controlled, the oxygen content of the pyrolysis gas can be controlled within the range of about 2-15 percent by changing the amount of the mixed gas, the free change can be realized according to the needs, so that the gold ore can be decomposed by different atmospheres at different stages of the pyrolysis, the pyrolysis is more complete to improve the recovery rate of gold extraction by cyaniding the gold clinker, (3) the waste gas after the gold ore pyrolysis is sent to a waste gas purification section, and lime powder is added into a waste gas pipe to absorb SO in the waste gas2And As2O3The waste gas is directly discharged into the atmosphere after dust is collected by a cloth bag. The temperature-controlled oxygen-doped gas pyrolysis furnace is composed of a gas generating furnace, a cooling-oxygen-doped section, a primary gold ore pyrolysis furnace and a waste gas purification section 4, high-temperature gas generated by the combustion furnace flows into the cooling-oxygen-doped section to be cooled and doped with oxygen to form pyrolysis gas, the pyrolysis gas is introduced into the pyrolysis furnace to decompose primary gold ore, the primary gold ore is converted into gold ore clinker capable of directly extracting gold by a cyanidation method, waste gas after the gold ore decomposition is introduced into the waste gas purification section, and is discharged into the atmosphere after being desulfurized and dearsenified by adding lime powder and dedusted by a cloth bag, and a small arrow in the figure refers to an attached figure 1 and an attached figure 2, wherein the small. The structure of the gas generating furnace (34) is the same as that of a common industrial coal-fired furnace, a combustion chamber (2) is arranged in a shell (1), a furnace door (3) is arranged on the side surface, a furnace bridge (4) is arranged at the bottom of the combustion chamber, and a gas outlet (5) is arranged at the top of the combustion chamber. The gas cooling-oxygen mixing section consists of a jacket water cooler (6) and a gas mixing chamber (12), wherein an inner pipe (7) of the jacket water cooler (6) isThe gas guide pipe, the outer pipe (8) is a cold water pipe, a water inlet (9) and a water outlet (11) are arranged on the outer pipe (8), and a cold water valve (10) is arranged on the water inlet (9) to control the flow of cold water. The gas primarily cooled by the jacket water cooler flows into the gas mixing chamber (12); the air mixing chamber (12) is made of common refractory materials, an air valve (16) is installed on an air inlet (17) of the air mixing chamber to control the flow rate of the mixed air, and two airflow baffles (13) are arranged inside the air mixing chamber (12) to change the direction of the airflow so as to uniformly mix the fuel gas and the mixed air. The aim of cooling the fuel gas can be achieved by independently using the jacket water cooler (6) or the gas mixing chamber (12), the two coolers are used in a mixing mode to mix oxygen with required amount into the pyrolysis gas while cooling, when the air valve is closed and the cold water valve is enlarged, the cooling of the fuel gas is independently completed by the jacket water cooler, and at the moment, the oxygen content of the pyrolysis gas is the lowest and is about 2%; when the cold water valve is closed and the air valve is enlarged, the cooling process is independently completed by the gas mixing chamber, the oxygen content in the pyrolysis gas is highest and can reach about 15%, when the cold water valve and the air valve are properly opened, the oxygen content in the pyrolysis gas is between the lowest value and the highest value, and when the air valve is reduced by enlarging the cold water valve, the oxygen content in the pyrolysis gas is lower; when the cold water valve is reduced and the air valve is enlarged, the oxygen content in the pyrolysis gas is higher, the pyrolysis gas with the adjusted temperature and oxygen content flows to the primary gold ore pyrolysis furnace from the pyrolysis gas outlet (15), and the primary gold ore is decomposed by adopting the pyrolysis gas with different oxygen contents in different stages of pyrolysis, so that the complete decomposition of the gold ore is facilitated, and the recovery rate of cyaniding gold extraction can be improved. The feed inlet (32) of native gold ore pyrolysis furnace (35) is established at the furnace roof, this mouth is covered by feed inlet lid (33) when not feeding, cubic native gold ore is thrown into pyrolysis chamber (20) by the feed inlet, there is pyrolysis gas import (18) pyrolysis chamber's side top, this air inlet ann has admission valve (19) that can open and shut, the bottom of pyrolysis chamber is movable furnace bridge (22), be lower air chamber (25) below the movable furnace bridge, the bottom of lower air chamber is one can follow movable bottom plate (24) that the horizontal direction was embedded into or was taken out, when this bottom plate inlays, lower air chamber and stove bottom are kept apart, and when movable bottom plate took out, lower air chamber and stove bottom UNICOM, waste gas after the decomposition gold ore flows to the exhaust purification section from exhaust outlet (23). The movable mode of the furnace bridge comprises the following two modes: (1) draw-insert type, i.e. the single steel bar or the steel bar group forming the furnace bridge can be inserted into or drawn out from the furnace bridge hole arranged on the furnace wall when the primary gold oreDuring charging, the furnace bar is inserted as a support for the weight of the gold ore blocks; when discharging, the fire bar is transversely drawn out, so that the gold ore clinker is discharged to the furnace bottom by the weight of the fire bar, (2) the fire bar is rotatably suspended, namely, one side of a furnace bridge is suspended on one side of the furnace wall by a rotatable shaft, the other side of the furnace bridge is supported on the opposite furnace wall by a movable object, and at the moment, the primary gold ore block is loaded into the pyrolysis chamber; after pyrolysis is completed, the movable support is taken away, one side of the furnace bridge falls down, and the other side is hung on the rotating shaft of the opposite furnace wall, so that the gold ore clinker is automatically discharged to the furnace bottom. The movable furnace bridge of the pyrolysis furnace needs to work at the high temperature of pyrolysis gas, and a common steel bar is easy to deform, and in order to solve the problem, one of the following measures can be taken: (1) casting furnace bridge by using heat-resistant cast iron with the grade of RTSi-5.5 or RQTSI-5.5, (2) casting furnace bridge by using high-temperature-resistant high-grade alloy steel as material, and (3) using airThe core steel pipe is used as a furnace bridge, and the hollow part is communicated with cold water to cool the furnace bridge. The waste gas purification section consists of a waste gas pipe (26), a spiral lime feeding machine (28), a draught fan (27), a waste gas extension pipe (29), a cloth bag dust collecting chamber (or a leaching dust removing tower) (30) and a chimney (31), lime powder of-200 meshes is added into the waste gas pipe (26) by the spiral lime feeding machine (28), and the lime powder and SO are mixed in the waste gas extension pipe (29)2And AS2O3Chemical reaction is carried out to generate insoluble and nuisanceless solid CaSO3(calcium sulfite) and Ca3(AsO3)2(calcium arsenite), they are filtered by the bag dust collecting chamber, and the purified waste gas is discharged into the atmosphere from the chimney.
Compared with the prior art, the invention has simple process and less equipment investment, and in the one-stage process for directly treating the primary gold ore, the gold recovery rate is higher than that of the two-stage process for cyaniding and extracting gold after mineral separation and enrichment.
FIG. 1 is a schematic structural view of a gas producer and a cooling-oxygen-doping section of the present invention; the cooling-oxygen-doping section is connected with a pyrolysis furnace.
FIG. 2 is a schematic structural view of a pyrolysis furnace and a waste gas purification section of the present invention.
The temperature-controlled oxygen-doped gas pyrolysis furnace consists of 4 parts, and has the following functions and operation processes:
1. a gas producer:
the basic structure of the gas producer is the same as that of a common industrial coal-fired furnace (see attached figure 1), and the gas producer utilizes cheap fuels such as coal, coke and the like to produce high-temperature gas which is properly cooled and mixed with air to increase oxygen to be used as chemical power for decomposing primary gold ores. In the operation of the gas producer, the temperature and the flow of the fuel gas and the CO in the fuel gas can be controlled by changing the factors such as the granularity of the fuel, the thickness of the fuel layer, the air supply quantity and the like2And O2The proportion of the gases is equal, so that the pyrolysis process is promoted to be smoothly carried out.
2. A cooling-oxygen doping section.
The cooling-oxygen mixing section consists of two parts of a jacket water cooler and a gas mixing chamber, and is shown in figure 1.
The operation of the cooling-oxygen mixing section directly influences the pyrolysis effect of the primary gold ore, thereby influencing the cyanidation extraction rate of gold in the ore. Different ores need different operating systems to achieve the best pyrolysis effect, generally speaking, a weak oxidizing atmosphere with lower temperature is adopted in the initial stage of pyrolysis, the temperature and oxygen content of pyrolysis gas are gradually increased later, and the primary gold ore is decomposed by pyrolysis gas with higher temperature and oxygen content in the later stage of pyrolysis.
3. A pyrolysis furnace: the pyrolysis furnace is constructed as described above with reference to figure 2.
The operating procedure of the pyrolysis furnace is as follows:
one, feeding and pyrolysis
(1) The movable furnace bridge is arranged at a horizontal charging position, and a movable support is well cushioned. (2) The movable bottom plate of the lower air chamber is inserted to completely isolate the lower air chamber from the furnace bottom. (3) And opening a feed port cover at the top of the furnace, and putting the primary gold ore blocks into the pyrolysis chamber. When feeding, the material should be loosened and ventilated and be uniform to facilitate the smooth passing of the heat-releasing gas. (4) And opening a pyrolysis gas inlet valve, and starting the induced draft fan to allow pyrolysis gas to enter the pyrolysis chamber. Under the action of a draught fan, pyrolysis gas downwards passes through the material layer to act with the ore, and thermal decomposition and oxidative decomposition are carried out on the ore. The waste gas enters the lower air chamber through the pore canal of the movable furnace bridge, and after being blocked by the movable bottom plate of the lower air chamber, the waste gas is folded to the upper side and enters the waste gas purification section from the waste gas outlet. The gold ore which is pyrolyzed and matured is easy to extract gold by cyanidation, and the recovery rate of gold is high.
Secondly, discharging
After the pyrolysis process is finished, the method comprises the following steps:
(1) and closing the induced draft fan, closing the pyrolysis gas inlet valve and stopping the pyrolysis gas from flowing into the pyrolysis chamber. (2) The movable bottom plate of the lower air chamber is pulled out, so that the lower air chamber is communicated with the furnace bottom. (3) The liner of the movable furnace bridge is removed, so that one side of the movable furnace bridge falls down, and the other side is hung on the rotating shaft of the opposite furnace wall. Because the support of the furnace bridge is lost, the gold ore clinkers fall to the furnace bottom by the weight of the gold ore clinkers, and the automatic discharging is completed. (4) The previous feeding and pyrolysis operations are repeated to start a new pyrolysis process of the primary gold ore.
4. Exhaust gas purification section
The waste gas purification section comprises a waste gas guide pipe, a spiral lime feeder, a draught fan, a waste gas extension pipe, a cloth bag dust collecting chamber (or a leaching type dust removing tower), a waste gas discharge chimney and the like, and the attached figure 2 is referred.
Lime powder added from the vertical direction by a spiral feeder encounters waste gas flowing at high speed in the horizontal direction, is collided into highly dispersed fine powder, is uniformly mixed with the waste gas and enters the waste gas extension pipe together with the waste gas. The SO is finished in the waste gas extension pipe2And As2O3The waste gas extension pipe is a place for completing the absorption reaction, has enough length to ensure the complete absorption, and generally has a length of 10-50 meters.
The theoretical amount of lime added is calculated as follows:
(solid calcium sulfite)
(solid calcium arsenite)
The actual amount of lime is 10-50 times the theoretical amount.
The embodiment of the invention comprises the following steps:
native gold ore in a certain place contains 5.8 g/ton of gold;
the combustion furnace is a common household coal-fired furnace, and the upper opening of a hearth is phi =12cm, the lower opening is phi =18cm, and h =30 cm;
the pyrolysis chamber of the pyrolysis furnace is cylindrical phi =14cm, h =30 cm;
the granularity of the primary gold ore is 1-2cm, the material layer thickness is 8cm, and the feeding amount is 2.2 kg;
the temperature of pyrolysis gas is 600-;
crushing the gold ore clinker to-2 mm, placing the crushed gold ore clinker in a plastic barrel, and soaking the crushed gold ore clinker in a NaCN solution with the concentration of 1.2 g/L in a circulating dropping mode, wherein the PH is 10-11, the using amount of the NaCN solution is 3L, the soaking time is 15 days, the leaching residue contains 0.9 g/ton of gold, and the leaching rate of the gold is 84.5%;
Claims (7)
1. a temperature-controlled oxygen-doped gas pyrolysis furnace primary gold ore decomposition gold extraction process by a cyanogenation method is characterized in that: (1) high-temperature fuel gas generated by a combustion furnace is mixed with oxygen and is pre-cooled to 450-850 ℃ to be used as pyrolysis gas, the pyrolysis gas is introduced into a pyrolysis furnace to carry out thermal decomposition and oxidative decomposition on primary gold ores in the furnace, so that the primary gold ores are converted into gold ore clinker, gold ore clinker is crushed to-5 mm,the gold ore clinker is put into a cyanidation tank and is soaked in sodium cyanide solution for gold extraction, the process is the same as the cyanidation gold extraction process of common oxidation type gold ores, 2, a cooling method combining jacket water cooling and direct air mixing with the fuel gas is adopted for cooling the fuel gas, so that the temperature of the pyrolysis gas can be controlled, the oxygen content of the pyrolysis gas can be controlled within the range of about 2-15 percent by changing the amount of the mixed gas, the free change can be realized according to the needs, so that the gold ore can be decomposed by different atmospheres at different stages of the pyrolysis, the pyrolysis is more complete to improve the recovery rate of gold extraction by cyaniding the gold clinker, (3) the waste gas after the gold ore pyrolysis is sent to a waste gas purification section, and lime powder is added into a waste gas pipe to absorb SO in the waste gas2And As2O3The waste gas is directly discharged into the atmosphere after dust is collected by a cloth bag.
2. The gold extraction process by cyanidation method for decomposing primary gold ore in the temperature-controlled oxygen-doped gas pyrolysis furnace according to claim 1, which is characterized in that: the temperature-controlled oxygen-doped gas pyrolysis furnace is composed of a gas generating furnace, a cooling-oxygen-doped section, a primary gold ore pyrolysis furnace and a waste gas purification section 4, high-temperature gas generated by the combustion furnace flows into the cooling-oxygen-doped section to be cooled and doped with oxygen to form pyrolysis gas, the pyrolysis gas is introduced into the pyrolysis furnace to decompose primary gold ore, the primary gold ore is converted into gold ore clinker capable of directly extracting gold by a cyanidation method, waste gas after the gold ore decomposition is introduced intothe waste gas purification section, and is discharged into the atmosphere after being desulfurized and dearsenified by adding lime powder and dedusted by a cloth bag, and a small arrow in the figure refers to an attached figure 1 and an attached figure 2, wherein the small.
3. The gold extraction process by cyanidation method for decomposing primary gold ore in the temperature-controlled oxygen-doped gas pyrolysis furnace according to claim 2, which is characterized in that: the structure of the gas generating furnace (34) is the same as that of a common industrial coal-fired furnace, a combustion chamber (2) is arranged in a shell (1), a furnace door (3) is arranged on the side surface, a furnace bridge (4) is arranged at the bottom of the combustion chamber, and a gas outlet (5) is arranged at the top of the combustion chamber.
4. The gold extraction process by cyanidation method for decomposing primary gold ore in the temperature-controlled oxygen-doped gas pyrolysis furnace according to claim 2, which is characterized in that: the gas cooling-oxygen mixing section consists of a jacket water cooler (6) and a gas mixing chamber (12), wherein an inner pipe (7) of the jacket water cooler (6) is a gas guide pipe, an outer pipe (8) is a cold water pipe, a water inlet (9) and a water outlet (11) are arranged on the outer pipe (8), and a cold water valve (10) is arranged on the water inlet (9) to control the flow of cold water. The gas primarily cooled by the jacket water cooler flows into the gas mixing chamber (12);
the air mixing chamber (12) is made of common refractory materials, an air valve (16) is installed on an air inlet (17) of the air mixing chamber to control the flow rate of the mixed air, and two airflow baffles (13) are arranged inside the air mixing chamber (12) to change thedirection of the airflow so as to uniformly mix the fuel gas and the mixed air.
The aim of cooling the fuel gas can be achieved by independently using the jacket water cooler (6) or the gas mixing chamber (12), the two coolers are used in a mixing mode to mix oxygen with required amount into the pyrolysis gas while cooling, when the air valve is closed and the cold water valve is enlarged, the cooling of the fuel gas is independently completed by the jacket water cooler, and at the moment, the oxygen content of the pyrolysis gas is the lowest and is about 2%; when the cold water valve is closed and the air valve is enlarged, the cooling process is independently completed by the gas mixing chamber, the oxygen content in the pyrolysis gas is highest and can reach about 15%, when the cold water valve and the air valve are properly opened, the oxygen content in the pyrolysis gas is between the lowest value and the highest value, and when the air valve is reduced by enlarging the cold water valve, the oxygen content in the pyrolysis gas is lower; when the cold water valve is reduced and the air valve is enlarged, the oxygen content in the pyrolysis gas is higher, the pyrolysis gas with the adjusted temperature and oxygen content flows to the primary gold ore pyrolysis furnace from the pyrolysis gas outlet (15), and the primary gold ore is decomposed by adopting the pyrolysis gas with different oxygen contents in different stages of pyrolysis, so that the complete decomposition of the gold ore is facilitated, and the recovery rate of cyaniding gold extraction can be improved.
5. The gold extraction process by cyanidation method for decomposing primary gold ore in the temperature-controlled oxygen-doped gas pyrolysis furnace according to claim 2, which is characterized in that: the feed inlet (32) of native gold ore pyrolysis furnace (35) is established at the furnace roof, this mouth is covered by feed inlet lid (33) when not feeding, cubic native gold ore is thrown into pyrolysis chamber (20) by the feed inlet, there is pyrolysis gas import (18) pyrolysis chamber's side top, this air inlet ann has admission valve (19) that can open and shut, the bottom of pyrolysis chamber is movable furnace bridge (22), be lower air chamber (25) below the movable furnace bridge, the bottom of lower air chamber is one can follow movable bottom plate (24) that the horizontal direction was embedded into or was taken out, when this bottom plate inlays, lower air chamber and stove bottom are kept apart, and when movable bottom plate took out, lower air chamber and stove bottom UNICOM, waste gas after the decomposition gold ore flows to the exhaust purification section from exhaust outlet (23).
The movable mode of the furnace bridge comprises the following two modes: (1) the drawing and inserting type is that a single steel bar or a steel bar group forming the furnace bridge can be inserted into or drawn out from a furnace bridge hole arranged on the furnace wall, and when the primary gold ore is charged, the furnace bar is inserted to be used as a support for the weight of the gold ore blocks; when discharging, the fire bar is transversely drawn out, so that the gold ore clinker is discharged to the furnace bottom by the weight of the fire bar, (2) the fire bar is rotatably suspended, namely, one side of a furnace bridge is suspended on one side of the furnace wall by a rotatable shaft, the other side of the furnace bridge is supported on the opposite furnace wall by a movable object, and at the moment, the primary gold ore block is loaded into the pyrolysis chamber; after pyrolysis is completed, the movable support is taken away, one side of the furnace bridge falls down, and the other side is hung on the rotating shaft of the opposite furnace wall, so that the gold ore clinker is automatically discharged to the furnace bottom.
6. The gold extraction process by cyanidation method for decomposing primary gold ore in the temperature-controlled oxygen-doped gas pyrolysis furnace according to claim 2, which is characterized in that: the movable furnace bridge of the pyrolysis furnace needs to work at the high temperature of pyrolysis gas, and a common steel bar is easy to deform, and in order to solve the problem, one of the following measures can be taken: (1) the method comprises the following steps of (1) casting a furnace bridge by using heat-resistant cast iron with the brand number of RTSi-5.5 or RQTSI-5.5, (2) casting the furnace bridge by using high-temperature-resistant high-grade alloy steel as a material, and (3) using a hollow steel pipe as the furnace bridge and introducing cold water to cool the furnace bridge.
7. The gold extraction process by cyanidation method for decomposing primary gold ore in the temperature-controlled oxygen-doped gas pyrolysis furnace according to claim 2, which is characterized in that: the waste gas purification section consists of a waste gas pipe (26), a spiral lime feeding machine (28), a draught fan (27), a waste gas extension pipe (29), a cloth bag dust collecting chamber (or a leaching dust removing tower) (30) and a chimney (31), lime powder of-200 meshes is added into the waste gas pipe (26) by the spiral lime feeding machine (28), and the lime powder and SO are mixed in the waste gas extension pipe (29)2And AS2O3Chemical reaction is carried out to generate insoluble and nuisanceless solid CaSO3(calcium sulfite) and Ca3(AsO3)2(calcium arsenite), they are filtered by the bag dust collecting chamber, and the purified waste gas is discharged into the atmosphere from the chimney.
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| CN 98111875 CN1227268A (en) | 1998-02-27 | 1998-02-27 | Gold-extracting cyanidation process decomposing primary gold ore in temperature controlling and oxygen admixing gas burning pyrolysis furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 98111875 CN1227268A (en) | 1998-02-27 | 1998-02-27 | Gold-extracting cyanidation process decomposing primary gold ore in temperature controlling and oxygen admixing gas burning pyrolysis furnace |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104259007A (en) * | 2014-09-17 | 2015-01-07 | 招远市招金贵合科技有限公司 | Device and method for removing harmful impurities before cyanidation tailing flotation for high-grade sulphur concentrate |
| CN105349797A (en) * | 2014-08-20 | 2016-02-24 | 中国科学院过程工程研究所 | Method for carrying out pre-treatment desilication gold leaching of gold-containing tailings or cyanidation tailings |
| CN106500102A (en) * | 2016-11-04 | 2017-03-15 | 中国科学技术大学 | A kind of controlled thermal Atmosphere Combustion device |
| CN107448958A (en) * | 2017-07-07 | 2017-12-08 | 邬智高 | Chemical emission processing unit |
| CN107789975A (en) * | 2016-09-07 | 2018-03-13 | 中国科学院过程工程研究所 | A kind of dearsenicating method of high-temperature flue gas |
| CN110423895A (en) * | 2019-08-15 | 2019-11-08 | 北京科技大学 | A kind of Refractory Au-ores heat of oxidation decoupling preprocess method |
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1998
- 1998-02-27 CN CN 98111875 patent/CN1227268A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349797A (en) * | 2014-08-20 | 2016-02-24 | 中国科学院过程工程研究所 | Method for carrying out pre-treatment desilication gold leaching of gold-containing tailings or cyanidation tailings |
| CN105349797B (en) * | 2014-08-20 | 2018-05-22 | 中国科学院过程工程研究所 | A kind of method containing golden tailing or cyanidation tailings pretreatment desiliconization leaching gold |
| CN104259007A (en) * | 2014-09-17 | 2015-01-07 | 招远市招金贵合科技有限公司 | Device and method for removing harmful impurities before cyanidation tailing flotation for high-grade sulphur concentrate |
| CN104259007B (en) * | 2014-09-17 | 2016-08-24 | 招远市招金贵合科技有限公司 | The device and method of objectionable impurities is removed before a kind of cyanidation tailings flotation of high-grade iron concentrate |
| CN107789975A (en) * | 2016-09-07 | 2018-03-13 | 中国科学院过程工程研究所 | A kind of dearsenicating method of high-temperature flue gas |
| CN106500102A (en) * | 2016-11-04 | 2017-03-15 | 中国科学技术大学 | A kind of controlled thermal Atmosphere Combustion device |
| CN106500102B (en) * | 2016-11-04 | 2018-11-13 | 中国科学技术大学 | A kind of controlled thermal Atmosphere Combustion device |
| CN107448958A (en) * | 2017-07-07 | 2017-12-08 | 邬智高 | Chemical emission processing unit |
| CN110423895A (en) * | 2019-08-15 | 2019-11-08 | 北京科技大学 | A kind of Refractory Au-ores heat of oxidation decoupling preprocess method |
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