CN1827798A - Hot pressing conversion method for low-grade antimony oxide ore - Google Patents
Hot pressing conversion method for low-grade antimony oxide ore Download PDFInfo
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- CN1827798A CN1827798A CN 200510048725 CN200510048725A CN1827798A CN 1827798 A CN1827798 A CN 1827798A CN 200510048725 CN200510048725 CN 200510048725 CN 200510048725 A CN200510048725 A CN 200510048725A CN 1827798 A CN1827798 A CN 1827798A
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Abstract
The invention relates the low-grade antimony oxide ore hot-pressed conversion method. The method comprises the following step: putting the antimony oxide ore, vulcanized agent and water into compression still, controlling the conversion temperature at 100-30Deg.C and the pressure at 1.0MPa-6.0MPa for 10-180 minutes, and direct converting the antimony oxide ore into sulphide. At the above condition, the vulcanized agent reacts with antimony and metallic element to make sulphide, and other lodestones retain in ore pulp. The invention has the advantages of simple technology, high metal recovery rate, easy antimony segregation, and little agent consumption.
Description
Technical Field
The invention belongs to the field of concentration and metallurgy, and particularly relates to a pretreatment method for mineral separation of complex antimony oxide ores.
Background
The antimony oxide ore deposit belongs to the oxidation part of sulfide ore deposit, and is an ore deposit formed by surface growth, namely the part of metal sulfide ore deposit close to the earth surface, and the surface growth zone ore deposit is generated after long-term action of oxygen, carbon dioxide, water, biological organic matters and the like. The low-grade antimony oxide ore has various mineral types, various oxide ores exist, are mixed and associated with each other, and have the advantages of fine embedded particle size, serious argillization state, uneven particle size and high content of fine quartz and clay. Thus, the separation and enrichment of such minerals is rather difficult and complicated.
Antimony mineral components in low-grade antimony oxide ore are more complex than those of primary ore (quartz stibnite ore). The oxidation causes the crystal to be damaged and changed into a soil-like, porous, flat and colloidal, pseudophase-like and crusty oxidized ore. The metal minerals are oxidized from the primary single stibnite to complex stibnite-yellow stibnite, ponytalite, stibnite, transition oxides-sulfur antimony ore (red stibnite) and residual stibnite. The gangue minerals are mainly quartz, and secondarily kaolinite, clay, carbonate and the like. Limonite-ferric hydroxide is present in small amounts. The lead mineral mainly comprises white lead ore (PbCO)3) Plumbite (PbSO)4). Calcite (PbCl)2·PbCO3) Chlorodiferous phosphate [3Pb]3(PO4)2·PbCl2]Lead arsenate [3Pb]3(AsO4)2·PbCl2]Plumbite (PbWO)4) And the like. The zinc mineral mainly comprises calamine (ZnCO)3) Willemite (Zn)2SiO4) Heteropolar mineral (H)2Zn2SiO3) Red zincite (ZnO), gahnite (ZnO. Al)2O3) Zinc-iron spinel[(Fe，Zn，Mn)O(Fe，Mn)2O3]Aurichalcite [2(Zn, Cu) CO]3(Zn，Cu)(OH)2]And the like. Therefore, the low-grade antimony oxide mineral has complex structure and structural composition, is commonly intergrowth with rock-making mineral fine particles, contains more or less iron oxide or iron hydroxide and clay, and has the characteristics of serious argillization, high oxidation degree, easy embrittlement and the like. At present, the enrichment and separation of low-grade antimony oxide ore are mainly carried outThe method adopts a complex multi-stage separation process selected according to the properties of minerals and a blast furnace volatilization-reverberatory furnace reduction smelting method, and has the defects of complex technical process, low metal recovery rate, difficult separation of lead and antimony, dispersion of valuable metals, high reagent consumption, difficulty in overcoming the complexity of minerals and difficulty in mineral separation.
Disclosure of Invention
The invention overcomes the defects of the prior method and provides a pretreatment method with simple technical process, high metal recovery rate, easy separation of lead and antimony, low reagent consumption and concentrated valuable metals.
The method comprises the following steps:
(1) adding low-grade antimony oxide ore, a vulcanizing agent and water into a pressure kettle, controlling the conversion temperature to be 100-301 ℃ and the pressure to be 1.0-6.0 MPa, and directly converting the antimony oxide ore into the sulfide for 10-180 minutes.
(2) Under the above conditions, the added vulcanizing agent is subjected to disproportionation reaction to selectively generate single sulfide with antimony and valuable metal elements thereof, and other gangue components are not changed and are remained in the ore pulp.
The disproportionation reaction of the vulcanizing agent is as follows:
the transformation reaction of lead, zinc and the valuable metals thereof is as follows:
the low-grade antimony oxide is antimony oxide ore with complex and variable mineral composition, the oxidation rate is 25-90%, the low-grade antimony oxide has two types of slime and ore sand, the antimony content is 1-20%, and the lead content is 0.01-3.5%. In the conversion process, a trace amount of hydrogen sulfide gas is generated, and the hydrogen sulfide gas is corrosive, so that the acid-resistant pressure kettle is a pressure kettle lined with ceramic tiles or titanium or stainless steel or pipelines, the pressure kettle can be divided into a container with or without a compartment, and the volume of the container is 10-200 m3The sulfide is produced in the pressure conversion of antimony oxide ore and other complex metal mineral, and the converting agent or sulfurizing agent added in the conversion process is sulfur into sodium sulfide or iron sulfide.
The invention has the beneficial effects that: the hot-pressing conversion process is to increase the temperature of the conversion process to 100-301 ℃ under a pressurized state, and water is used as a liquid medium to perform vulcanization conversion on elements such as antimony and the like in the complex mineral composition of the low-grade antimony oxide ore under the action of a vulcanizing agent to generate a single sulfide.
In the hot-pressing conversion process, sulfur is subjected to disproportionation reaction according to the formula (1) under the hot-pressing condition, complex mineral compositions in the low-grade antimony oxide ore are converted into antimony sulfide, lead sulfide, zinc sulfide and other sulfides according to the formulas (2) to (10), the complex mineral is converted into single mineral, and after the single mineral is treated by mature processes such as flotation separation and the like, single antimony concentrate, lead-zinc concentrate, iron concentrate and tailings are produced, so the low-grade antimony oxide ore hot-pressing conversion is a clean production technology for strengthening conversion, and the main process of the low-grade antimony oxide ore is not limited by the change of the mineral compositions.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Example one: under the conditions that the temperature is 100 ℃, and the pressure in a container is 1.0 MPa:
mixing low-grade antimony oxide ore containing 1.0% of antimony and 3.5% of lead with a vulcanizing agent and hot water, continuously pumping the mixture into a pressure kettle by using a pressure pump, controlling the temperature in the kettle to be 100 +/-1 ℃ by using steam or tap water, maintaining the pressure in the kettle to be 1.0MPa, and carrying out hot-pressing conversion on the antimony oxide ore for 30 minutes.
The antimony conversion rate is 85 percent, and the lead conversion rate is 88 percent.
Example two: under the conditions that the temperature is 301 ℃, and the pressure in the container is 6.0 MPa:
mixing low-grade antimony oxide ore containing 20% of antimony and 0.01% of lead with a vulcanizing agent and hot water, continuously pumping the mixture into a pressure container or a kettle by using a pressure pump, controlling the temperature in the kettle to be 301 +/-1 by using steam or tap water, maintaining the pressure in the kettle to be 6.0MPa, and carrying out hot-pressing conversion on the lead-zinc oxide ore for 180 minutes.
The antimony conversion rate is 96 percent, and the lead conversion rate is 97.5 percent.
Example three: under the conditions that the temperature is 301 ℃, and the pressure in the container is 1.0 MPa:
mixing low-grade antimony oxide ore containing 20% of antimony and 1.0% of lead with a vulcanizing agent and hot water, continuously pumping the mixture into a pressure container or a kettle by using a pressure pump, controlling the temperature in the kettle to be 280 +/-1 ℃ by using steam or tap water, maintaining the pressure in the kettle to be 1.0MPa, and carrying out hot-pressing conversion on the lead-zinc oxide ore for 120 minutes.
The antimony conversion rate is 92.5 percent, and the lead conversion rate is 93.6 percent.
Example four: under the conditions that the temperature is 301 ℃, and the pressure in a container is 3.0 MPa:
mixing low-grade antimony oxide ore containing 20% of antimony and 3.5% of lead with a vulcanizing agent and hot water, continuously pumping the mixture into a pressure container or a kettle by using a pressure pump, controlling the temperature in the kettle to be 280 +/-1 ℃ by using steam or tap water, maintaining the pressure in the kettle to be 3.0MPa, and carrying out hot-pressing conversion on the lead-zinc oxide ore for 100 minutes.
The antimony conversion rate is 95%, and the lead conversion rate is 94.6%.
Example five: under the conditions that the temperature is 190 ℃ and the pressure in the container is 2.0 MPa:
mixing low-grade antimony oxide ore containing 10.5% of antimony and 1.75% of lead with a vulcanizing agent and hot water, continuously pumping the mixture into a pressure container or a kettle by using a pressure pump, controlling the temperature in the kettle to be 190 +/-1 ℃ by using steam or tap water, maintaining the pressure in the kettle to be 2.0MPa, and carrying out hot-pressing conversion on the lead-zinc oxide ore for 120 minutes.
The antimony conversion rate is 95%, and the lead conversion rate is 93.8%.
Claims (10)
1. A hot-pressing conversion method of low-grade antimony oxide ore comprises the following steps:
(1) adding low-grade antimony oxide ore, a vulcanizing agent and water into a pressure kettle, and directly converting the antimony oxide ore into single sulfide precipitate under the conditions of controlling the conversion temperature to be 100-301 ℃, the pressure to be 1.0-6.0 MPa and the time to be 10-180 minutes;
(2) under the above conditions, the added vulcanizing agent is subjected to disproportionation reaction to selectively generate a single sulfide with antimony and valuable metal elements thereof, and other gangue components are not changed and are kept in the ore pulp;
the disproportionation reaction of the vulcanizing agent is as follows:
the transformation reaction of lead, zinc and the valuable metals thereof is as follows:
2. the method for hot-pressing conversion of low-grade antimony oxide ore according to claim 1, characterized by: the autoclave is an autoclave with a ceramic tile inside.
3. The method for hot-pressing conversion of low-grade antimony oxide ore according to claim 1, characterized by: the autoclave is a titanium autoclave.
4. The method for hot-pressing conversion of low-grade antimony oxide ore according to claim 1, characterized by: the autoclave is a stainless steel autoclave.
5. The method for hot-pressing conversion of low-grade antimony oxide ore according to claim 1, characterized by: the autoclave is a pipeline autoclave.
6. The method for hot-pressing conversion of low-grade antimony oxide ore according to claim 1, characterized by: the chemical component of the added vulcanizing agent is sulfur.
7. The method for hot-pressing conversion of low-grade antimony oxide ore according to claim 1, characterized by: the chemical component of the added vulcanizing agent is sodium sulfide.
8. The method for hot-pressing conversion of low-grade antimony oxide ore according to claim 1, characterized by: the chemical composition of the added vulcanizing agent is iron sulfide.
9. The method for hot-pressing conversion of low-grade antimony oxide ore according to claim 1, characterized by: the pressure is 3.1MPa to 6.0 MPa.
10. The method for hot-pressing conversion of low-grade antimony oxide ore according to claim 1, characterized by: the temperature is 201-301 ℃.
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| CN 200510048725 CN1827798A (en) | 2005-12-22 | 2005-12-22 | Hot pressing conversion method for low-grade antimony oxide ore |
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| CN 200510048725 CN1827798A (en) | 2005-12-22 | 2005-12-22 | Hot pressing conversion method for low-grade antimony oxide ore |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747229A (en) * | 2012-07-31 | 2012-10-24 | 中南大学 | Method for separating and recycling valuable metals in powder rich in multiple metals of waste circuit board |
| CN103480496A (en) * | 2013-09-29 | 2014-01-01 | 中南大学 | Sulfuration roasting flotation process for low-grade antimony oxide ore |
| CN115627363A (en) * | 2022-09-26 | 2023-01-20 | 中南大学 | Resource recovery method of antimony smelting slag |
-
2005
- 2005-12-22 CN CN 200510048725 patent/CN1827798A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747229A (en) * | 2012-07-31 | 2012-10-24 | 中南大学 | Method for separating and recycling valuable metals in powder rich in multiple metals of waste circuit board |
| CN103480496A (en) * | 2013-09-29 | 2014-01-01 | 中南大学 | Sulfuration roasting flotation process for low-grade antimony oxide ore |
| CN115627363A (en) * | 2022-09-26 | 2023-01-20 | 中南大学 | Resource recovery method of antimony smelting slag |
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