CN111850288A - Arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ore - Google Patents
Arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ore Download PDFInfo
- Publication number
- CN111850288A CN111850288A CN202010727899.2A CN202010727899A CN111850288A CN 111850288 A CN111850288 A CN 111850288A CN 202010727899 A CN202010727899 A CN 202010727899A CN 111850288 A CN111850288 A CN 111850288A
- Authority
- CN
- China
- Prior art keywords
- arsenic
- dust collector
- powder
- sulfur
- copper
- 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.)
- Pending
Links
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- 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
- C01B17/02—Preparation of sulfur; Purification
- C01B17/06—Preparation of sulfur; Purification from non-gaseous sulfides or materials containing such sulfides, e.g. ores
-
- 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
-
- 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
- C22B1/26—Cooling of roasted, sintered, or agglomerated ores
-
- 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
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0002—Preliminary treatment
- C22B15/001—Preliminary treatment with modification of the copper constituent
- C22B15/0013—Preliminary treatment with modification of the copper constituent by roasting
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0002—Preliminary treatment
- C22B15/001—Preliminary treatment with modification of the copper constituent
- C22B15/0021—Preliminary treatment with modification of the copper constituent by reducing in gaseous or solid state
Abstract
The invention relates to the technical field of arsenic removal and desulfurization, and discloses an arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ores, wherein the device can facilitate the transportation of materials through the arrangement of each conveying device, so that the working efficiency of the device is higher; through the arrangement of the cooling mechanism, the clinker can be cooled in time and is conveniently conveyed into the second storage bin for storage; by arranging the cyclone dust collector and the pulse dust collector, the reaction gas can be converted into arsenic trioxide powder and sulfur powder to the maximum extent and separated out respectively; hot flue gas in the rotary kiln can be extracted through the arrangement of the induced draft fan; the method has better treatment effect on the arsenic-containing and sulfur-containing copper-gold ore powder compared with the traditional two-stage type heat-removing treatment function by three-stage heating of drying, pre-reduction and gasification decomposition and adopting sodium phosphite as a catalyst.
Description
Technical Field
The invention belongs to the technical field of arsenic removal and desulfurization, and particularly relates to an arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ores.
Background
Metals which occupy an important position in national economy include copper, gold and the like, the copper belongs to national strategic resources, and according to statistics, over 70 percent of refined copper all over the world is produced by a pyrometallurgical process. 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. 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.
In addition, with the rapid development of the gold industry, gold ore resources which are easy to develop by adopting a single technology are gradually exhausted, refractory gold ore resources become main raw materials of the gold industry in China in future, the reserves of arsenic-containing and sulfur-containing refractory gold ores account for 60 percent of the total reserves of the gold ores in the world, and the recovery of gold in the refractory gold ores increasingly shows an important position with the gradual exhaustion of the refractory gold ore resources. The arsenic-containing and sulfur-containing refractory gold ore is required to be subjected to oxidation pretreatment so as to effectively recover gold, and the method is a key step of a gold extraction process. The oxidation pretreatment process mainly comprises gasification, pressure oxidation, bacterial oxidation, chemical oxidation such as Cl2, HNO3 and the like, wherein the gasification is a new and effective oxidation pretreatment process, main equipment for gasification of the new process comprises a rotary kiln, heating equipment, dust removing equipment and the like, but all the equipment needs large-scale and corrosion-resistant equipment, the process flow is complex, the investment is large, the operation is carried out at high temperature and pressure, strict production technology management is needed, the industrial implementation difficulty is high, and the like.
Disclosure of Invention
In order to solve the above problems, a primary object of the present invention is to provide an arsenic removal and desulfurization apparatus for arsenic-containing and sulfur-containing metal ores, which can perform an efficient arsenic removal and desulfurization treatment on high-arsenic and sulfur-containing metal ores.
Another object of the present invention is to provide a method for arsenic removal and desulfurization of arsenic-containing and sulfur-containing metal ores, which can achieve better treatment effect on arsenic-containing and sulfur-containing copper-gold ore powder than the conventional two-stage heat-removing treatment function by three-stage heating of drying, pre-reduction and gasification decomposition and using sodium phosphite as a catalyst.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention provides an arsenic-removing and desulfurizing device for arsenic-containing and sulfur-containing metal ore, which comprises:
the rotary kiln is characterized in that a kiln head sealing cover and a kiln tail sealing cover are respectively arranged at two ends of the rotary kiln; the kiln tail sealing cover is provided with a feeding hole for feeding materials to the roasting kiln; a discharge hole is formed in the kiln head sealing cover;
the first bin is connected with a feeding hole of the rotary kiln through a first conveying device and is used for conveying the stirred mineral powder into the rotary kiln;
the heating mechanism is connected to the head end of the rotary kiln and used for roasting mineral powder in the rotary kiln;
one end of the cooling mechanism is connected with a discharge hole of the rotary kiln, so that clinker generated after the mineral powder roasting enters the cooling mechanism to be cooled, and the other end of the cooling mechanism is connected with a second storage bin through a second conveying device, so that the cooled clinker is conveyed into the second storage bin to be stored;
the dust removal mechanism comprises a cyclone dust collector and a pulse dust collector, an air outlet pipe is arranged at the tail end of the rotary kiln and communicated with the cyclone dust collector, so that reaction gas generated after the mineral powder is roasted can enter the cyclone dust collector, the cyclone dust collector is communicated with the pulse dust collector, the cyclone dust collector is provided with a first recovery bin, the pulse dust collector is provided with a second recovery bin, and the first recovery bin and the second recovery bin are both connected with a third conveying device;
and one end of the induced draft fan is communicated with the pulse dust collector, and the other end of the induced draft fan is communicated with the chimney.
According to the invention, through the arrangement of the first conveying device, the second conveying device and the third conveying device, materials can be conveniently conveyed, so that the working efficiency of the device is higher; through the arrangement of the cooling mechanism, the clinker can be cooled in time and is conveniently conveyed into the second storage bin for storage, and the clinker can be used as a raw material for extracting metal arsenic and gold; by arranging the cyclone dust collector and the pulse dust collector, the reaction gas can be converted into arsenic trioxide powder and sulfur powder to the maximum extent and separated out respectively, so that the arsenic trioxide powder and the sulfur powder fall into the first recovery bin and the second recovery bin respectively and are sent out through the third conveying device; the hot flue gas in the rotary kiln can be extracted through the arrangement of the induced draft fan.
Further, the cooling mechanism is a cooling machine; the first conveying device and the third conveying device are both screw conveyors; the second conveying device is a lifter; a belt conveyor is arranged between the stirrer and the first storage bin; the stirrer adopts a double-shaft stirrer, and the synchronous rotation of two symmetrical spiral shafts is utilized to facilitate the transferring of the bronze ore powder into a belt conveyor and feeding the bronze ore powder into a first bin; the rotary kiln, the cyclone dust collector and the pulse dust collector are all made of stainless steel. In the invention, the stable conveying of materials among various devices can be realized by the application of the screw conveyor, the elevator, the belt conveyor and the double-shaft stirrer; the device is made of stainless steel, so that the defects of heavy device, difficult installation and poor heat conduction effect of the traditional refractory material are overcome, and the cyclone dust collector is made of stainless steel, so that the cooling effect of the cyclone dust collector is better, reaction gas in the cyclone dust collector can be converted into arsenic trioxide powder and sulfur powder to be separated, and the separation effect is better.
Furthermore, 8 cyclone are provided, 8 cyclone are arranged in two rows and are communicated in sequence, and the air inlet end of each cyclone is provided with a cooling valve capable of charging cold air. In the invention, 8 mutually communicated cyclone dust collectors are arranged, so that reaction gas can be converted into arsenic trioxide powder and sulfur powder to the maximum extent and separated out; after the reaction gas is introduced, the external equipment can be charged with cold air through the cooling valve to reduce the temperature of the cyclone dust collector.
Further, the heating mechanism comprises a combustor, a fan and a gas source, the combustor is arranged at the head end of the rotary kiln, the fan is communicated with the combustor through a valve, and the gas source is communicated with the combustor through a main valve. In the invention, the combustor adopts natural gas as a raw material, and the natural gas is combusted under the conditions of wind power and hydrogen of the fan, so that a multi-section temperature zone can be formed in the rotary kiln, and higher air pressure is generated, so that materials are continuously rolled in the rotary kiln, and strong air pressure is generated in the natural gas combustion heating process, so that mineral elements are reduced and gasified to form qualified clinker.
The invention also provides an arsenic removal and desulfurization method for the arsenic-containing and sulfur-containing metal ore, which comprises the following steps:
grinding: grinding the copper-gold ore containing arsenic and sulfur into copper-gold ore powder;
mixing materials: uniformly stirring the copper-gold ore powder, a reducing agent and a catalyst to obtain a uniform mixture, wherein the catalyst adopts sodium phosphite;
drying; drying the uniformly mixed material at the temperature of 200 ℃ and 300 ℃ to remove crystal water in the copper-gold ore powder;
pre-reduction; carrying out pre-reduction treatment after drying, wherein the pre-reduction temperature is 450-600 ℃;
gasifying and decomposing; carrying out gasification decomposition after pre-reduction, wherein the gasification decomposition temperature is 600-1100 ℃, obtaining reaction gas and clinker after gasification decomposition, and storing the clinker after cooling;
dust collection treatment; and introducing the reaction gas into a cyclone dust collector and a pulse dust collector in sequence for treatment to obtain arsenic trioxide powder and sulfur powder.
In the invention, after a large number of experiments, the inventor finds that the catalyst adopts sodium phosphite and is matched with a reducing agent to realize better arsenic removal and desulfurization effects; uniformly stirring the copper-gold ore powder, the reducing agent and the catalyst, and then drying, heating to 200-300 ℃, so that crystal water in the copper-gold ore powder can be better removed; after drying, heating to 600 ℃ of 450-; through three-stage heating of drying, pre-reduction and gasification decomposition and the adoption of sodium phosphite as a catalyst, compared with the traditional two-stage antipyretic treatment function, the method has better treatment effect on copper-gold ore powder containing arsenic and sulfur, especially high arsenic; the arsenic removal rate of the copper-gold ore powder with high arsenic can reach more than 97 percent, and the arsenic content of the copper-gold ore powder after arsenic removal is greatly reduced; the copper concentrate with higher sulfur content needs to be reserved, and the higher arsenic removal rate can be kept; after arsenic is removed from the copper-gold ore powder, the copper-gold ore powder is recycled by a cyclone dust collector and a pulse dust collector, gas is converted into solid, and the sulfur powder containing arsenic can be used as a chemical raw material; toxic sulfur trioxide and arsenic trioxide gas are converted into solid, white arsenic and sulfur powder are recovered, the method is very environment-friendly, and the utilization rate of resources is improved.
Further, in the material mixing step, the copper-gold ore powder, the reducing agent and the catalyst are placed in a double-shaft stirrer to be stirred, and then are conveyed into a first storage bin through a belt conveyor, and then the uniformly mixed material is conveyed into a rotary kiln through a first conveying device, and the steps of drying, pre-reducing and gasifying decomposition are carried out under 28-32 standard atmospheric pressures. In the invention, the arsenic removal and the desulfurization of the copper-gold ore powder are carried out in the gasification pressure, and more than 99 percent of arsenic element can be removed only by keeping the gasification pressure at about 30 standard atmospheric pressures, and the material can be better conveyed by the arrangement of the first conveying device and the belt conveyor.
Furthermore, the time of the steps of drying, pre-reduction and gasification decomposition is 1-2 hours. In the invention, the reaction time is 1-2 hours, so that a better arsenic removal and desulfurization effect can be realized.
Further, the uniform mixture comprises 95% of copper-gold ore powder, 2% of reducing agent and 3% of catalyst by weight percentage. In the invention, a large number of experiments of the inventor prove that the proportion can realize better arsenic removal and desulfurization effects.
Further, the reducing agent is coke. In the invention, the reducing agent adopts coke, so that a better reducing effect can be realized.
Furthermore, in the steps of drying, pre-reduction and gasification decomposition, a burner is adopted to cooperate with a gas source and a fan to generate combustion, so that a multi-section temperature zone is formed in the rotary kiln, and air pressure is generated. In the invention, the burning material adopts natural gas, heavy oil and anthracite, the bronze mineral powder continuously rolls in the rotary kiln, and strong air pressure is generated in burning and heating, so that mineral elements in the mineral powder are reduced and gasified into qualified clinker.
Further, the clinker obtained after gasification and decomposition is cooled by a cooler and then is sent to a second storage bin by a lifter for storage. In the invention, the clinker can be better transported by the elevator, the clinker can be cooled in time by the cooler and is conveniently sent into the second storage bin for storage, and the clinker can be used as a raw material for extracting gold or copper.
Further, in order to achieve a better separation effect, the temperature of the cyclone in the dust collecting treatment step is 25 to 35 ℃.
The invention has the beneficial effects that: compared with the prior art, the arsenic removal and desulfurization device provided by the invention has the advantages that the first conveying device, the second conveying device and the third conveying device are arranged, so that the materials can be conveniently conveyed, and the working efficiency of the device is higher; through the arrangement of the cooling mechanism, the clinker can be cooled in time and is conveniently conveyed into the second storage bin for storage, and the clinker can be used as a raw material for extracting metal arsenic and gold; by arranging the cyclone dust collector and the pulse dust collector, the reaction gas can be converted into arsenic trioxide powder and sulfur powder to the maximum extent and separated out respectively, so that the arsenic trioxide powder and the sulfur powder fall into the first recovery bin and the second recovery bin respectively and are sent out through the third conveying device; hot flue gas in the rotary kiln can be extracted through the arrangement of the induced draft fan;
according to the arsenic removal and desulfurization method, the copper-gold ore powder, the reducing agent and the catalyst are uniformly stirred and then dried, and the mixture is heated to 200 ℃ and 300 ℃, so that crystal water in the copper-gold ore powder can be better removed; after drying, heating to 600 ℃ of 450-; through three-stage heating of drying, pre-reduction and gasification decomposition and the adoption of sodium phosphite as a catalyst, compared with the traditional two-stage antipyretic treatment function, the method has better treatment effect on copper-gold ore powder containing arsenic and sulfur, especially high arsenic; the arsenic removal rate of the copper-gold ore powder with high arsenic can reach more than 97 percent, and the arsenic content of the copper-gold ore powder after arsenic removal is greatly reduced; the copper concentrate with higher sulfur content needs to be reserved, and the higher arsenic removal rate can be kept; after arsenic is removed from the copper-gold ore powder, the copper-gold ore powder is recycled by a cyclone dust collector and a pulse dust collector, gas is converted into solid, and the sulfur powder containing arsenic can be used as a chemical raw material; toxic sulfur trioxide and arsenic trioxide gas are converted into solid, white arsenic and sulfur powder are recovered, the method is very environment-friendly, and the utilization rate of resources is improved.
Drawings
FIG. 1 is a schematic structural diagram of the apparatus for removing arsenic and sulfur in accordance with the present invention.
In the figure: a rotary kiln 1; a kiln head sealing cover 11; a kiln tail sealing cover 12; an outlet pipe 13; a stirrer 2; a first silo 3; a first conveying device 4; a combustor 51; a fan 52; a gas source 53; a valve 54; a main valve 55; a cooling mechanism 6; a second conveying device 7; a second silo 8; a cyclone 9; a first recovery bin 91; a pulse dust collector 10; a second recovery bin 20; an induced draft fan 30; a chimney 40; a belt conveyor 50; and a third conveyor 60.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides an apparatus for removing arsenic and sulfur from an arsenic-containing sulfur-containing metal ore, comprising:
the rotary kiln comprises a rotary kiln 1, wherein a kiln head sealing cover 11 and a kiln tail sealing cover 12 are respectively arranged at two ends of the rotary kiln 1; the kiln tail sealing cover 12 is provided with a feeding hole for feeding materials to the roasting kiln; a discharge hole is arranged on the kiln head sealing cover 11;
the stirring machine 2 is connected with a first bin 3, and the first bin 3 is connected with a feeding hole of the rotary kiln 1 through a first conveying device 4 and used for conveying the stirred mineral powder into the rotary kiln 1;
the heating mechanism is connected to the head end of the rotary kiln 1 and is used for roasting the mineral powder in the rotary kiln 1;
one end of the cooling mechanism 6 is connected with a discharge hole of the rotary kiln 1, so that clinker generated by roasting the mineral powder enters the cooling mechanism 6 to be cooled, and the other end of the cooling mechanism 6 is connected with a second bin 8 through a second conveying device 7, so that the cooled clinker is conveyed into the second bin 8 to be stored;
the dust removal mechanism comprises a cyclone dust collector 9 and a pulse dust collector 10, an air outlet pipe 13 is arranged at the tail end of the rotary kiln 1, the air outlet pipe 13 is communicated with the cyclone dust collector 9, so that reaction gas generated after mineral powder roasting can enter the cyclone dust collector 9, the cyclone dust collector 9 is communicated with the pulse dust collector 10, the cyclone dust collector 9 is provided with a first recovery bin 91, the pulse dust collector 10 is provided with a second recovery bin 20, and the first recovery bin 91 and the second recovery bin 20 are both connected with a third conveying device 60;
and one end of the induced draft fan 30 is communicated with the pulse dust collector 10, and the other end of the induced draft fan 30 is communicated with the chimney 40.
In the embodiment, the device is suitable for arsenic removal and desulfurization treatment of multi-metal ore containing arsenic and sulfur, such as copper-gold ore; through the arrangement of the first conveying device 4, the second conveying device 7 and the third conveying device 60, materials can be conveniently conveyed, and the working efficiency of the device is higher; through the arrangement of the cooling mechanism 6, the clinker can be cooled in time and is conveniently conveyed into the second storage bin 8 for storage, and the clinker can be used as a raw material for extracting metal arsenic and gold; by the arrangement of the cyclone dust collector 9 and the pulse dust collector 10, the reaction gas can be converted into arsenic trioxide powder and sulfur powder to the maximum extent and separated out respectively, so that the arsenic trioxide powder and the sulfur powder fall into the first recovery bin 91 and the second recovery bin 20 respectively and are sent out through the third conveying device 60; the hot flue gas in the rotary kiln 1 can be extracted through the arrangement of the induced draft fan 30. The reaction gas treated by the cyclone 9 and the pulse dust collector 10 is substantially air, and is discharged from the chimney 40 under the action of the induced draft fan 30.
Preferably, the cooling mechanism 6 is a chiller; the first conveying device 4 and the third conveying device 60 may adopt screw conveyors; the second conveying device 7 can adopt a lifter; a belt conveyor 50 can be arranged between the stirrer 2 and the first storage bin 3; the stirrer 2 can adopt a double-shaft stirrer 2, and the synchronous rotation of two symmetrical spiral shafts is utilized to facilitate the transferring of the bronze ore powder into the belt conveyor 50 and the feeding into the first storage bin 3; the rotary kiln 1, the cyclone dust collector 9 and the pulse dust collector 10 can be made of stainless steel. The stainless steel has good thermal conductivity, so that the temperature stability of the cyclone dust collector is facilitated.
Preferably, 8 cyclone dust collectors 9 are arranged, 8 cyclone dust collectors 9 are sequentially communicated in two rows, and a cooling valve capable of charging cold air is arranged at an air inlet end of each cyclone dust collector 9. In the invention, 8 mutually communicated cyclone dust collectors 9 are arranged, so that reaction gas can be converted into arsenic trioxide powder and sulfur powder to the maximum extent and separated out; after the reaction gas is introduced, the external equipment can be charged with cold air through the cooling valve to reduce the temperature of the cyclone dust collector.
Preferably, the heating mechanism comprises a burner 51, a fan 52 and a gas source 53, the burner 51 is arranged at the head end of the rotary kiln 1, the fan 52 is communicated with the burner 51 through a valve 54, and the gas source is communicated with the burner 51 through a main valve 55. In the invention, the fuel of the combustor 51 can adopt natural gas, heavy oil or anthracite, and the combustion is generated under the conditions of wind power and hydrogen of the fan 52, so that a multi-section temperature zone can be formed in the rotary kiln 1, and higher air pressure is generated, so that the materials continuously roll in the rotary kiln 1, and strong air pressure is generated in the combustion and heating of natural gas, and mineral elements are reduced and gasified to form qualified clinker.
The invention also provides an arsenic removal and desulfurization method for the arsenic-containing and sulfur-containing metal ore, which comprises the following steps:
grinding: grinding the copper-gold ore containing arsenic and sulfur into copper-gold ore powder;
mixing materials: uniformly stirring the copper-gold ore powder, a reducing agent and a catalyst to obtain a uniform mixture, wherein the catalyst adopts sodium phosphite;
drying; drying the uniformly mixed material at the temperature of 200 ℃ and 300 ℃ to remove crystal water in the copper-gold ore powder;
pre-reduction; carrying out pre-reduction treatment after drying, wherein the pre-reduction temperature is 450-600 ℃;
gasifying and decomposing; carrying out gasification decomposition after pre-reduction, wherein the temperature of the gasification decomposition is 600-1100 ℃, obtaining reaction gas and clinker after the gasification decomposition, and storing the clinker after cooling;
dust collection treatment; and introducing the reaction gas into a cyclone dust collector and a pulse dust collector in sequence for treatment to obtain arsenic trioxide powder and sulfur powder.
In the embodiment, after a large number of experiments, the inventor finds that the catalyst adopts sodium phosphite and is matched with a reducing agent to realize better arsenic removal and desulfurization effects; uniformly stirring the copper-gold ore powder, the reducing agent and the catalyst, and then drying, heating to 200-300 ℃, so that crystal water in the copper-gold ore powder can be better removed; after drying, heating to 600 ℃ of 450-; through three-stage heating of drying, pre-reduction and gasification decomposition and the adoption of sodium phosphite as a catalyst, compared with the traditional two-stage antipyretic treatment function, the method has better treatment effect on copper-gold ore powder containing arsenic and sulfur, especially high arsenic; the arsenic removal rate of the copper-gold ore powder with high arsenic can reach more than 97 percent, and the arsenic content of the copper-gold ore powder after arsenic removal is greatly reduced; the copper concentrate with higher sulfur content needs to be reserved, and the higher arsenic removal rate can be kept; after arsenic is removed from the copper-gold ore powder, the copper-gold ore powder is recycled by a cyclone dust collector and a pulse dust collector, gas is converted into solid, and the sulfur powder containing arsenic can be used as a chemical raw material; toxic sulfur trioxide and arsenic trioxide gas are converted into solid, white arsenic and sulfur powder are recovered, the method is very environment-friendly, and the utilization rate of resources is improved.
Preferably, in the material mixing step, the bronze mineral powder, the reducing agent and the catalyst are put into a double-shaft stirrer for stirring treatment, then are conveyed into a first bin through a belt conveyor, and then are conveyed into a rotary kiln through a first conveying device, and are dried, pre-reduced and gasified and decomposed under 28-32 standard atmospheric pressures. In the invention, the arsenic removal and the desulfurization of the copper-gold ore powder are carried out in the gasification pressure, and more than 99 percent of arsenic element can be removed only by keeping the gasification pressure at about 30 standard atmospheric pressures, and the material can be better conveyed by the arrangement of the first conveying device and the belt conveyor.
Preferably, the drying, pre-reduction and gasification decomposition steps are all carried out for 1-2 hours. In the invention, the reaction time is 1-2 hours, so that a better arsenic removal and desulfurization effect can be realized.
Preferably, the refining material comprises 95% of copper-gold ore powder, 2% of reducing agent and 3% of catalyst by weight percentage. In the invention, a large number of experiments of the inventor prove that the proportion can realize better arsenic removal and desulfurization effects.
Preferably, the reductant is coke. In the invention, the reducing agent adopts coke, so that a better reducing effect can be realized.
Preferably, in the steps of drying, pre-reduction and gasification decomposition, a burner is adopted to cooperate with a gas source and a fan to generate combustion, so that a multi-section temperature zone is formed in the rotary kiln, and air pressure is generated. In the invention, the burning material adopts natural gas, heavy oil and anthracite, the bronze mineral powder continuously rolls in the rotary kiln, and strong air pressure is generated in burning and heating, so that mineral elements in the mineral powder are reduced and gasified into qualified clinker.
Preferably, the clinker obtained after gasification and decomposition is cooled by a cooler and then is sent to the second storage bin by a lifting machine for storage. In the invention, the clinker can be better transported by the elevator, the clinker can be cooled in time by the cooler and is conveniently sent into the second storage bin for storage, and the clinker can be used as a raw material for extracting gold or copper.
Preferably, the temperature of the cyclone in the dust collecting treatment step is 25 to 35 ℃ in order to achieve a better separation effect.
The apparatus and method for removing arsenic and sulfur according to the present invention will be described in detail with reference to the following embodiments.
Example 1
The embodiment is mainly applied to high-arsenic bronze ores, and the obtained clinker is required to have lower arsenic content and sulfur content; the method comprises the following steps:
grinding the copper-gold ore powder into copper-gold ore powder, and then putting the copper-gold ore powder, coke and sodium phosphite into a double-shaft stirrer according to the weight ratio of 95 percent, 2 percent and 3 percent for stirring to form a uniform mixture;
then the mixture is conveyed into a first storage bin through a belt conveyor, the mixed mixture is conveyed into a rotary kiln through a first conveying device, drying treatment is carried out under 28 standard atmospheric pressures, a burner is adopted to cooperate with a gas source and a fan to generate combustion for heating, the drying temperature is 250 ℃, the time is 2 hours, and crystal water in the copper-gold ore powder is removed;
after drying, carrying out pre-reduction treatment, continuously heating by a burner to form a multi-section temperature zone in the rotary kiln, and starting the pre-reduction treatment for 2 hours when the temperature reaches 450 ℃;
carrying out gasification decomposition after pre-reduction, continuously heating by using a burner, starting gasification decomposition when the temperature reaches 750 ℃, and gradually heating to 1100 ℃ for 2 hours; if some ores contain arsenic metal, the arsenic metal can be decomposed when the temperature reaches 950 ℃, and reaction gas and clinker are obtained after gasification and decomposition;
the clinker is cooled by a cooler and then is sent into a second bin by a lifter for storage;
and (2) introducing the reaction gas into 4 cyclone dust collectors in sequence, and then introducing the reaction gas into a pulse dust collector for treatment, so as to obtain arsenic trioxide powder in a first recovery bin of the cyclone dust collectors, and obtain sulfur powder in a second recovery bin of the pulse dust collectors, wherein the temperature of the cyclone dust collectors is 10 ℃.
Example 2
This example is mainly applied to the case where the clinker is required to have a low arsenic content but a high sulfur content, because the high sulfur content of copper concentrate contributes to the fluidity of the furnace, and the method is adjusted to the following specific requirements:
grinding the arsenic-containing and sulfur-containing copper gold ore into copper gold ore powder, and then putting the copper gold ore powder, coke and sodium phosphite into a double-shaft stirrer according to the weight ratio of 95%, 2% and 3% to stir to form a mixed material;
then the mixture is conveyed into a first storage bin through a belt conveyor, the mixed mixture is conveyed into a rotary kiln through a first conveying device, drying treatment is carried out under 28 standard atmospheric pressures, a burner is adopted to cooperate with a gas source and a fan to generate combustion for heating, the drying temperature is 250 ℃, the time is 1 hour, and crystal water in the copper-gold ore powder is removed;
after drying, carrying out pre-reduction treatment, continuously heating by a burner to form a multi-section temperature zone in the rotary kiln, and starting the pre-reduction treatment for 1 hour when the temperature reaches 450 ℃;
carrying out gasification decomposition after pre-reduction, continuously heating by a burner, and starting gasification decomposition for 1 hour when the temperature reaches 600 ℃; obtaining reaction gas and clinker after gasification and decomposition;
the bronze ore used in the method does not generally contain arsenic metal, but can volatilize arsenic under 30 standard atmospheric pressures, sulfur volatilizes only about 40 percent due to the reduction of roasting time and gasification decomposition temperature, and the obtained sintered clinker still has about 60 percent of sulfur and simultaneously removes more than 99.5 percent of arsenic.
The clinker is cooled by a cooler and then is sent into a second bin by a lifter for storage;
and (2) introducing the reaction gas into 4 cyclone dust collectors in sequence, and then introducing the reaction gas into a pulse dust collector for treatment, so as to obtain arsenic trioxide powder in a first recovery bin of the cyclone dust collectors, and obtain sulfur powder in a second recovery bin of the pulse dust collectors, wherein the temperature of the cyclone dust collectors is 10 ℃.
Experimental verification
Selecting copper-gold ore powder of 3 different kinds of multi-metal ores, and respectively naming the copper-gold ore powder as ore powder 1, ore powder 2 and ore powder 3 for convenient distinction; the method is adopted to carry out arsenic removal and desulfurization treatment, and then different metal elements are detected on the treatment products of 3 kinds of mineral powder respectively.
Firstly, the detection result of the mineral powder 1 is as follows:
1. the copper-gold ore powder ground from the ore powder 1 was examined, and the examination results are shown in table 1.
Table 1 shows the test results of the copper-gold ore powder subjected to arsenic removal and desulfurization of the ore powder 1 according to GB/T3884
| Sample name | Cu(％) | S(％) | As(％) |
| Mineral powder 1 | 23.72 | 35.51 | 7.94 |
2. Detecting the fly ash obtained by the mineral powder 1 by adopting the device and the method of the embodiment 2, wherein the fly ash is a sample of arsenic trioxide powder and sulfur powder obtained by dust collection treatment; the results are shown in Table 2.
Table 2 shows the results of the dust removal of the ore powder 1
| Sample name | Cu(％) | S(％) | As(％) |
| Dust removal ash | 16.78 | 17.57 | 26.18 |
3. The burned material obtained from the ore powder 1 by the apparatus of the present invention and the method of example 2 was examined, and the examination results are shown in table 3.
Table 3 shows the results of the test of the clinker of mineral powder 1
| Sample name | Cu(％) | S(％) | As(％) |
| Burning clinker | 31.73 | 26.12 | 0.53 |
As can be seen from tables 1-3,
as can be seen from tables 1-3, the arsenic content in the ore powder 1 is 7.94%; in the clinker obtained by adopting the device and the method of the embodiment 2, the arsenic content is reduced to 0.53 percent, and the arsenic removal rate is more than 93 percent;
the sulfur content in the raw ore powder is 35.51%, because the ore powder needs high sulfur content of copper concentrate and is beneficial to the fluidity of the furnace, the sulfur content in the clinker obtained by the method is 26.12%, and the sulfur content is kept above 70%.
The copper content of the treated clinker is increased to 31.73%, and the copper content of 16.78% in the fly ash is added, so that the recovery rate of copper can be improved in subsequent treatment.
Therefore, the method can meet the requirements of arsenic removal and desulfurization of the copper-gold ore, and can maintain a high arsenic removal rate for copper concentrate with high sulfur content.
Secondly, the detection result of the mineral powder 2 is as follows:
1. the copper-gold ore powder ground from the ore powder 2 was examined, and the examination results are shown in table 4.
Table 4 shows the results of the tests on the copper-gold ore powder subjected to arsenic removal and desulfurization on the ore powder 2 according to GB/T3884
| Sample name | Au(g/t) | S(％) | As(％) | SiO2(％) | Fe(％) |
| Mineral powder 2 | 34.98 | 36.01 | 16.68 | 3.15 | 33.09 |
2. Detecting the fly ash obtained by the mineral powder 2 by adopting the device and the method of the embodiment 1, wherein the fly ash is a sample of arsenic trioxide powder and sulfur powder obtained by dust collection treatment; the results are shown in Table 5.
Table 5 shows the results of the dust removal of the ore powder 2
| Sample name | Au(g/t) | S(％) | As(％) |
| Dust removal ash | 13.72 | 11.22 | 30.10 |
3. The burned clinker obtained from the ore powder 2 by the apparatus of the present invention and the method of example 1 was examined, and the examination results are shown in table 6.
Table 6 shows the results of the test of the clinker of mineral powder 2
| Sample name | Au(g/t) | S(％) | As(％) | SiO2(％) | Fe(％) |
| Burning clinker | 28.65 | 0.48 | 0.852 | 8.84 | 43.20 |
As can be seen from tables 4-6, the arsenic content in the ore powder 2 is 34.98%, which is a high arsenic metal ore; the arsenic content of the clinker obtained by adopting the device and the method of the embodiment 1 is reduced to 0.852%, and the arsenic removal rate is more than 97%;
the sulfur content in the raw ore powder is 36.01 percent, the sulfur content in the clinker obtained by adopting the device and the method of the embodiment 1 is reduced to 0.48 percent, and the arsenic removal rate is more than 98 percent;
therefore, the method of the invention can meet the requirement of arsenic removal and desulfurization of the high-arsenic copper-gold ore.
Thirdly, the detection result of the mineral powder 3 is as follows:
1. the copper-gold ore powder ground from the ore powder 3 was examined, and the examination results are shown in table 7.
Table 7 shows the results of the tests on the copper-gold ore powder subjected to arsenic removal and desulfurization on the ore powder 3 according to GB/T3884
| Sample name | Au(g/t) | S(％) | As(％) | C(％) |
| Mineral powder 3 | 35.88 | 21.40 | 28.89 | 0.22 |
2. The burned clinker obtained from the ore powder 3 by the apparatus of the present invention and the method of example 1 was examined, and the examination results are shown in table 8.
Table 8 shows the results of the test of the clinker of mineral powder 3
| Sample name | Au(g/t) | S(％) | As(％) | C(％) |
| Burning clinker | 48.90 | 1.16 | 0.69 | 1.80 |
According to tables 7-8, the arsenic content in the ore powder 3 is 28.89%, which is a high arsenic metal ore; the arsenic content of the clinker obtained by adopting the device and the method of the embodiment 1 is reduced to 0.69 percent, and the arsenic removal rate is more than 97 percent;
the sulfur content in the raw ore powder is 21.40%, the sulfur content in the clinker obtained by adopting the device and the method of the embodiment 1 is reduced to 1.16%, and the arsenic removal rate is more than 95%;
therefore, the method of the invention can meet the requirement of arsenic removal and desulfurization of the high-arsenic copper-gold ore.
The gold content is increased from 35.88% to 48.90%, and is increased by more than 13%; after arsenic is removed from the copper-gold ore powder, the copper-gold ore powder is recycled by a cyclone dust collector and a pulse dust collector, gas is converted into solid, and the sulfur powder containing arsenic can be used as a chemical raw material; toxic sulfur trioxide and arsenic trioxide gas are converted into solid, white arsenic and sulfur powder are recovered, the method is very environment-friendly, and the utilization rate of resources is improved.
Other embodiments of the invention are as follows:
example 3
Grinding the arsenic-containing and sulfur-containing copper gold ore into copper gold ore powder, and then putting the copper gold ore powder, coke and sodium phosphite into a double-shaft stirrer according to the weight ratio of 95%, 2% and 3% to stir to form a mixed material;
then the mixture is conveyed into a first storage bin through a belt conveyor, the mixed mixture is conveyed into a rotary kiln through a first conveying device, drying treatment is carried out under 30 standard atmospheric pressures, a burner is adopted to cooperate with a gas source and a fan to generate combustion for heating, the drying temperature is 250 ℃, the drying time is 1.5 hours, and crystal water in the copper-gold ore powder is removed;
after drying, carrying out pre-reduction treatment, continuously heating by a burner to form a multi-section temperature zone in the rotary kiln, and starting the pre-reduction treatment for 1.5 hours when the temperature reaches 500 ℃;
carrying out gasification decomposition after pre-reduction, continuously heating by using a burner, starting gasification decomposition when the temperature reaches 750 ℃, and gradually heating to 1000 ℃ for 1.5 hours; obtaining reaction gas and clinker after gasification and decomposition;
the clinker is cooled by a cooler and then is sent into a second bin by a lifter for storage;
and (2) introducing the reaction gas into 4 cyclone dust collectors in sequence, and then introducing the reaction gas into a pulse dust collector for treatment, so as to obtain arsenic trioxide powder in a first recovery bin of the cyclone dust collectors, and obtain sulfur powder in a second recovery bin of the pulse dust collectors, wherein the temperature of the cyclone dust collectors is 15 ℃.
Example 4
Grinding the arsenic-containing and sulfur-containing copper gold ore into copper gold ore powder, and then putting the copper gold ore powder, coke and sodium phosphite into a double-shaft stirrer according to the weight ratio of 95%, 2% and 3% to stir to form a mixed material;
then the mixture is conveyed into a first storage bin through a belt conveyor, the mixed mixture is conveyed into a rotary kiln through a first conveying device, drying treatment is carried out under 32 standard atmospheric pressures, a burner is adopted to cooperate with a gas source and a fan to generate combustion for heating, the drying temperature is 200 ℃, the drying time is 1 hour, and crystal water in the copper-gold ore powder is removed;
after drying, carrying out pre-reduction treatment, continuously heating by a burner to form a multi-section temperature zone in the rotary kiln, and starting the pre-reduction treatment for 1 hour when the temperature reaches 650 ℃;
carrying out gasification decomposition after pre-reduction, continuously heating by using a burner, starting gasification decomposition when the temperature reaches 750 ℃, and gradually heating to 1100 ℃ for 1 hour; obtaining reaction gas and clinker after gasification and decomposition;
the clinker is cooled by a cooler and then is sent into a second bin by a lifter for storage;
and (2) introducing the reaction gas into 4 cyclone dust collectors in sequence, and then introducing the reaction gas into a pulse dust collector for treatment, so as to obtain arsenic trioxide powder in a first recovery bin of the cyclone dust collectors, and obtain sulfur powder in a second recovery bin of the pulse dust collectors, wherein the temperature of the cyclone dust collectors is 15 ℃.
Example 5
Grinding the arsenic-containing and sulfur-containing copper gold ore into copper gold ore powder, and then putting the copper gold ore powder, coke and sodium phosphite into a double-shaft stirrer according to the weight ratio of 95%, 2% and 3% to stir to form a mixed material;
then the mixture is conveyed into a first storage bin through a belt conveyor, the mixed mixture is conveyed into a rotary kiln through a first conveying device, drying treatment is carried out under 29 standard atmospheric pressures, a burner is adopted to cooperate with a gas source and a fan to generate combustion for heating, the drying temperature is 250 ℃, the drying time is 1.5 hours, and crystal water in the copper-gold ore powder is removed;
after drying, carrying out pre-reduction treatment, continuously heating by a burner to form a multi-section temperature zone in the rotary kiln, and starting the pre-reduction treatment for 1.5 hours when the temperature reaches 600 ℃;
carrying out gasification decomposition after pre-reduction, continuously heating by a burner, starting gasification decomposition when the temperature reaches 750 ℃, and gradually heating to 950 ℃ for 1.5 hours; obtaining reaction gas and clinker after gasification and decomposition;
the clinker is cooled by a cooler and then is sent into a second bin by a lifter for storage;
and (2) introducing the reaction gas into 4 cyclone dust collectors in sequence, and then introducing the reaction gas into a pulse dust collector for treatment, so as to obtain arsenic trioxide powder in a first recovery bin of the cyclone dust collectors, and obtain sulfur powder in a second recovery bin of the pulse dust collectors, wherein the temperature of the cyclone dust collectors is 10 ℃.
Example 6
Grinding the arsenic-containing and sulfur-containing copper gold ore into copper gold ore powder, and then putting the copper gold ore powder, coke and sodium phosphite into a double-shaft stirrer according to the weight ratio of 95%, 2% and 3% to stir to form a mixed material;
then the mixture is conveyed into a first storage bin through a belt conveyor, the mixed mixture is conveyed into a rotary kiln through a first conveying device, drying treatment is carried out under 31 standard atmospheric pressures, a burner is adopted to cooperate with a gas source and a fan to generate combustion for heating, the drying temperature is 250 ℃, the time is 2 hours, and crystal water in the copper-gold ore powder is removed;
after drying, carrying out pre-reduction treatment, continuously heating by a burner to form a multi-section temperature zone in the rotary kiln, and starting the pre-reduction treatment for 2 hours when the temperature reaches 450 ℃;
carrying out gasification decomposition after pre-reduction, continuously heating by a burner, starting gasification decomposition when the temperature reaches 750 ℃, and gradually heating to 950 ℃ for 2 hours; obtaining reaction gas and clinker after gasification and decomposition;
the clinker is cooled by a cooler and then is sent into a second bin by a lifter for storage;
and (2) introducing the reaction gas into 4 cyclone dust collectors in sequence, and then introducing the reaction gas into a pulse dust collector for treatment, so as to obtain arsenic trioxide powder in a first recovery bin of the cyclone dust collectors, and obtain sulfur powder in a second recovery bin of the pulse dust collectors, wherein the temperature of the cyclone dust collectors is 15 ℃.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An apparatus for removing arsenic and sulfur from an arsenic-containing sulfur-containing metal ore, comprising:
the rotary kiln is characterized in that a kiln head sealing cover and a kiln tail sealing cover are respectively arranged at two ends of the rotary kiln; the kiln tail sealing cover is provided with a feeding hole for feeding materials to the roasting kiln; a discharge hole is formed in the kiln head sealing cover;
the first bin is connected with a feeding hole of the rotary kiln through a first conveying device and is used for conveying the stirred mineral powder into the rotary kiln;
the heating mechanism is connected to the head end of the rotary kiln and used for roasting mineral powder in the rotary kiln;
one end of the cooling mechanism is connected with a discharge hole of the rotary kiln, so that clinker generated after the mineral powder roasting enters the cooling mechanism to be cooled, and the other end of the cooling mechanism is connected with a second storage bin through a second conveying device, so that the cooled clinker is conveyed into the second storage bin to be stored;
the dust removal mechanism comprises a cyclone dust collector and a pulse dust collector, an air outlet pipe is arranged at the tail end of the rotary kiln and communicated with the cyclone dust collector, so that reaction gas generated after the mineral powder is roasted can enter the cyclone dust collector, the cyclone dust collector is communicated with the pulse dust collector, the cyclone dust collector is provided with a first recovery bin, the pulse dust collector is provided with a second recovery bin, and the first recovery bin and the second recovery bin are both connected with a third conveying device;
and one end of the induced draft fan is communicated with the pulse dust collector, and the other end of the induced draft fan is communicated with the chimney.
2. The apparatus according to claim 1, wherein the cooling means is a cooling machine; the first conveying device and the third conveying device are both screw conveyors; the second conveying device is a lifter; a belt conveyor is arranged between the stirrer and the first storage bin; the stirrer adopts a double-shaft stirrer, and the synchronous rotation of two symmetrical spiral shafts is utilized to facilitate the transferring of the bronze ore powder into a belt conveyor and feeding the bronze ore powder into a first bin; the rotary kiln, the cyclone dust collector and the pulse dust collector are all made of stainless steel materials; the cyclone dust collector is provided with 8, 8 cyclone dust collectors are arranged into two rows and are communicated in sequence, and the air inlet end of each cyclone dust collector is provided with a cooling valve which can be filled with cold air.
3. The apparatus according to claim 1, wherein the heating mechanism comprises a burner, a blower and a gas source, the burner is disposed at the head end of the rotary kiln, the blower is connected to the burner via a valve, and the gas source is connected to the burner via a main valve.
4. A method for removing arsenic and sulfur from an arsenic-containing sulfur-containing metal ore, comprising:
grinding: grinding the copper-gold ore containing arsenic and sulfur into copper-gold ore powder;
mixing materials: uniformly stirring the copper-gold ore powder, a reducing agent and a catalyst to obtain a uniform mixture, wherein the catalyst adopts sodium phosphite;
drying; drying the uniformly mixed material at the temperature of 200 ℃ and 300 ℃ to remove crystal water in the copper-gold ore powder;
pre-reduction; carrying out pre-reduction treatment after drying, wherein the pre-reduction temperature is 450-600 ℃;
gasifying and decomposing; carrying out gasification decomposition after pre-reduction, wherein the gasification decomposition temperature is 600-1100 ℃, obtaining reaction gas and clinker after gasification decomposition, and storing the clinker after cooling;
dust collection treatment; and introducing the reaction gas into a cyclone dust collector and a pulse dust collector in sequence for treatment to obtain arsenic trioxide powder and sulfur powder.
5. The method according to claim 4, wherein in the step of mixing, the bronze ore powder, the reducing agent and the catalyst are stirred in a double-shaft stirrer and then are conveyed to the first bunker by a belt conveyor, and then the mixed material is conveyed to the rotary kiln by the first conveying device, and is dried, pre-reduced and decomposed by gasification under 28-32 standard atmospheric pressures; and the clinker is cooled by the cooler and then is sent into the second bin by the elevator for storage.
6. The method of claim 4, wherein the drying, pre-reduction and gasification decomposition steps are carried out for 1-2 hours.
7. The method of claim 4, wherein the blending material comprises 95 wt% of the copper-gold ore powder, 2 wt% of the reducing agent and 3 wt% of the catalyst.
8. The method of claim 4, wherein the reductant is coke.
9. The method as claimed in claim 4, wherein the steps of drying, pre-reduction and gasification decomposition are performed by using a burner in combination with a gas source and a fan to generate combustion, so that a plurality of temperature zones are formed in the rotary kiln and the gas pressure is generated.
10. The method according to claim 4, wherein the cyclone in the dust collection treatment step is set to a temperature of 25 to 35 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010727899.2A CN111850288A (en) | 2020-07-24 | 2020-07-24 | Arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010727899.2A CN111850288A (en) | 2020-07-24 | 2020-07-24 | Arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111850288A true CN111850288A (en) | 2020-10-30 |
Family
ID=72950873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010727899.2A Pending CN111850288A (en) | 2020-07-24 | 2020-07-24 | Arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111850288A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100242681A1 (en) * | 2009-03-31 | 2010-09-30 | Sumitomo Metal Mining Co., Ltd. | Method for concentration of gold in copper sulfide minerals |
| CN107201420A (en) * | 2017-04-14 | 2017-09-26 | 爱润森德（天津）能源科技有限公司 | The energy comprehensive utilization system and its production technology of a kind of smelting in rotary kiln sponge iron |
| CN110205483A (en) * | 2019-06-13 | 2019-09-06 | 云南锡业股份有限公司铜业分公司 | A kind of reduction roasting handles the system and technique of low-grade tin raw material |
| CN110283990A (en) * | 2019-07-31 | 2019-09-27 | 尚明东 | A kind of the arsenic removal desulfurizer and method of arsenic-containing sulphur-containing refractory gold ore |
-
2020
- 2020-07-24 CN CN202010727899.2A patent/CN111850288A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100242681A1 (en) * | 2009-03-31 | 2010-09-30 | Sumitomo Metal Mining Co., Ltd. | Method for concentration of gold in copper sulfide minerals |
| CN107201420A (en) * | 2017-04-14 | 2017-09-26 | 爱润森德（天津）能源科技有限公司 | The energy comprehensive utilization system and its production technology of a kind of smelting in rotary kiln sponge iron |
| CN110205483A (en) * | 2019-06-13 | 2019-09-06 | 云南锡业股份有限公司铜业分公司 | A kind of reduction roasting handles the system and technique of low-grade tin raw material |
| CN110283990A (en) * | 2019-07-31 | 2019-09-27 | 尚明东 | A kind of the arsenic removal desulfurizer and method of arsenic-containing sulphur-containing refractory gold ore |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1940099B (en) | Process for treatment of waste materials and/or slime containing copper and precious metal | |
| CN203728902U (en) | Integrated solid waste gas ash and zinc-containing ferrovanadium slag recovery device | |
| CN102399993B (en) | Method for treating waste residue from wet method gold smelting | |
| CN104911356A (en) | Comprehensive recovery technology of solid waste gas ash and zinc-containing ferrovanadium slag | |
| CN111455165B (en) | Suspension magnetization roasting cyanogen breaking-low intensity magnetic separation iron extraction device for high-iron cyanidation tailings | |
| CN210085535U (en) | Resource utilization system for waste incineration power generation ash | |
| CN111500852B (en) | Carbon-containing gold ore suspension roasting system | |
| CN113862493B (en) | Method for co-processing and utilizing arsenic-containing materials in nonferrous smelting | |
| CN111485100B (en) | Method for enhancing gold leaching rate by suspension roasting of carbon-containing gold ore | |
| CN102492855A (en) | Method for recovering valuable metal from solid waste material containing zinc | |
| CN107840311A (en) | A kind of method of containing sulphur-slag recovery sulphur | |
| CN103131849A (en) | Sulfur concentrate sand roasting method favorable for comprehensive resource utilization | |
| CN110616334B (en) | Method for cooperatively treating semicoke and zinc-containing dust | |
| CN204039332U (en) | The metallurgical restoring system of coal gas circulation coal wholegrain radial sector pyrolysis coupling | |
| CN111172405A (en) | Microwave rotary hearth furnace chlorination gold extraction device and method | |
| CN217579030U (en) | System for treating oil-containing muddy water of rolled steel by rotary hearth furnace | |
| CN111850288A (en) | Arsenic removal and desulfurization device and method for arsenic-containing and sulfur-containing metal ore | |
| EP1697549B1 (en) | A process for extraction of nickel from low grade chromite ore | |
| CN211689180U (en) | Gold extraction device by microwave rotary hearth furnace chlorination | |
| CN112080644B (en) | Method for cooperatively treating zinc-containing dust and polycrystalline silicon cutting waste material in main channel of blast furnace | |
| CN210585358U (en) | Novel deironing device of refractory material | |
| CN210585357U (en) | Deironing device of refractory material fine powder | |
| CN109457123B (en) | Treatment process of dust containing iron and zinc | |
| CN113774215A (en) | Method for recovering valuable metals in high-zinc high-lead smelting slag | |
| CN112410566A (en) | Method and device for processing zinc-containing dust through pre-reduction microwave sintering |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201030 |