CN109806980B - Method for controlling malachite vulcanization products and application thereof - Google Patents
Method for controlling malachite vulcanization products and application thereof Download PDFInfo
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Abstract
A method for the control of malachite sulphides and the use thereof, using 1: 1, proportioning sulfur: sulfurUrea powder is used as a vulcanizing agent, iron powder is used as a vulcanization reaction auxiliary agent, the malachite vulcanization is completed by using the mechanochemical action in the ore grinding process, and a layer of CuFeS can be generated on the surface of the malachite2The sulfide thin film is mainly a sulfide thin film, the sulfide thin film is high in chemical stability and mechanical stability, oxidation reaction cannot occur in the subsequent flotation process, and the product thin film cannot fall off mechanically when the stirring rotor of the flotation machine rotates at the speed of 160-180 rpm. The floatation recovery rate of the malachite vulcanized by the method can reach 75.6-82.5 percent, is close to the floatation index of sulfide ores, and has wide popularization and application prospect.
Description
Technical Field
The invention belongs to the technical field of mineral processing, relates to sulfuration flotation of malachite, and particularly relates to a method for controlling a malachite sulfuration product and application thereof.
Background
As mineral resources become increasingly poor and fine, the requirements of people on the comprehensive recovery rate of resources, the quality of concentrate products and the flotation separation effect are continuously improved, and the flotation separation of complex multi-metal oxidized ores becomes increasingly important. Compared with copper sulfide ore, the malachite has better solubility and higher surface hydrophilicity, and is not easy to float, so that the prior sulfuration is the most widely applied method at present. The vulcanization is to change the surface property of the mineral by adding a vulcanizing agent, so that a layer of sulfide mineral film is generated on the surface of the mineral, the hydrophobicity is improved, the floating is easy, and the recovery rate is improved. The vulcanizing agent commonly used at present is sodium sulfide or sodium hydrosulfide, the vulcanizing agent has the problems of slow vulcanization reaction, difficult process control and poor sulfide film stability, the generated sulfide film is easy to loosen and fall off under the action of a complex flow field of ore pulp, especially the dosage is difficult to control, the insufficient dosage of the sodium sulfide or the sodium hydrosulfide cannot ensure enough reducing atmosphere, the vulcanization effect cannot be achieved, and the excessive dosage can generate obvious inhibiting effect on subsequent flotation.
Disclosure of Invention
In order to overcome the defect of poor floatation index of the malachite, the invention aims to provide a method for controlling a malachite vulcanized product and application thereof2A sulfide film with high hydrophobicity, mechanical stability and chemical stability, no oxidation in the subsequent floatation process, and reaction floatationThe product film of the mechanical stirring rotor can not fall off mechanically at the rotating speed of 50-60rpm, the malachite can be effectively vulcanized and the vulcanization product of the malachite can be effectively controlled by adopting the method, and the concentrate recovery rate of the malachite is greatly improved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for controlling the sulfurizing product of malachite features that the sulfurizing agent is sulfur and thiourea powder, the sulfurizing reaction assistant is iron powder, and the sulfurizing of malachite is completed by mechano-chemical action during grinding.
The mass ratio of the sulfur to the thiourea is 1: 1.
the malachite is finely crushed malachite, and the particle size is less than 8 mm.
The dosage of the vulcanizing agent is 300-1000 g/t.
The dosage of the vulcanization reaction auxiliary agent is 100-300 g/t.
The ore grinding mode is dry ore grinding, and the ore grinding time is 5-15 min.
The sulfurized malachite is floated (by adopting a conventional flotation process), the flotation recovery rate reaches 75.6-82.5 percent, and the floatation index is close to that of sulfide ore, so that the method has wide popularization and application prospects.
The flotation adopts butyl xanthate as a collecting agent, the dosage of the butyl xanthate is 55-100mg/L, and 2# oil is a foaming agent, and the addition amount of the butyl xanthate is 1-4 mu L/L.
The principle of the invention is as follows:
the following compositions were used: 1, proportioning sulfur: thiourea powder is used as a vulcanizing agent, iron powder is used as a vulcanization reaction auxiliary agent, ion exchange is carried out by utilizing the mechanochemical action in the ore grinding process, a layer of sulfide film mainly comprising CuFeS2 is generated on the surface of the malachite, the sulfide film has strong hydrophobicity, chemical stability and mechanical stability, and the flotation recovery rate of the malachite is improved.
Compared with the existing method for vulcanizing the malachite, the method has the advantages of high vulcanizing speed, high efficiency and convenient operation, and can realize the maximum utilization of copper oxide resources.
Detailed Description
The following examples are provided to explain embodiments of the present invention in detail.
Example 1
In the process of grinding the malachite, the grinding process comprises the following steps of: 1 preparing sulfur and thiourea powder as a vulcanizing agent, adding the vulcanizing agent into a mill according to the dosage of 300g/t, adding auxiliary agent iron powder according to the dosage of 100g/t, and dry-milling for 5 min; after ore grinding, a conventional flotation method is adopted, butyl xanthate with the dosage of 55mg/L is used as a collecting agent and acts for 3min, 2# oil is used as a foaming agent, the addition amount is 1 mu L/L and acts for 1min, foam scraping is carried out for 4min, and the flotation recovery rate of malachite can reach 75.6%.
Compared with the selection scheme without adding a vulcanizing agent, the method improves the recovery rate of the malachite by 35 percent.
Example 2
In the process of grinding the malachite, the grinding process comprises the following steps of: 1 preparing sulfur and thiourea powder as a vulcanizing agent, adding the vulcanizing agent into a mill according to the dosage of 500g/t, adding auxiliary agent iron powder according to the dosage of 200g/t, and dry-milling for 10 min; after ore grinding, a conventional flotation method is adopted, butyl xanthate is used as a collecting agent, the dosage is 85mg/L, the effect is 3min, 2# oil is used as a foaming agent, the adding amount is 2 mu L/L, the effect is 1min, the foam scraping is 4min, and the flotation recovery rate of malachite can reach 80.3%.
Compared with the selection scheme without adding a vulcanizing agent, the method improves the recovery rate of the malachite by 39.7 percent.
Example 3
In the process of grinding the malachite, the grinding process comprises the following steps of: 1, preparing sulfur and thiourea powder as a vulcanizing agent, adding the sulfur and thiourea powder into a mill according to the dosage of 1000g/t, adding auxiliary agent iron powder according to the dosage of 300g/t, and dry-milling for 15 min; after ore grinding, a conventional flotation method is adopted, butyl xanthate is used as a collecting agent, the dosage is 100mg/L, the effect is 3min, 2# oil is used as a foaming agent, the adding amount is 4 mu L/L, the effect is 1min, the foam scraping is 4min, and the flotation recovery rate of malachite can reach 82.5%.
Compared with the selection scheme without adding a vulcanizing agent, the method improves the recovery rate of the malachite by 41.9 percent.
Claims (5)
1. A method for controlling a malachite vulcanization product is characterized in that the weight ratio of the materials is 1: 1 Sulfur and Thiourea powderThe powder is used as a vulcanizing agent, the iron powder is used as a vulcanization reaction auxiliary agent, the malachite vulcanization is completed by using the mechanochemical action in the ore grinding process, and a layer of CuFeS is generated on the surface of the malachite2The sulfide film is mainly a sulfide film, the sulfide film is high in hydrophobicity, mechanical stability and chemical stability, oxidation cannot occur in the subsequent flotation process, the product film cannot fall off mechanically when a reaction flotation machine stirring rotor rotates at the speed of 50-60rpm, the dosage of the vulcanizing agent is 300-1000 g/t, and the dosage of the vulcanization reaction auxiliary agent is 100-300 g/t.
2. The method for malachite vulcanization product control of claim 1, wherein the malachite is finely divided malachite with a particle size <8 mm.
3. The method for controlling the malachite vulcanization products according to claim 1, characterized in that the ore grinding mode is dry ore grinding, and the ore grinding time is 5-15 min.
4. The use of the method for the control of malachite vulcanization products of claim 1, characterized in that flotation of the vulcanized malachite is carried out with a flotation recovery rate of 75.6% to 82.5%.
5. The application of the method according to claim 4, wherein butyl xanthate is used as a collector in an amount of 55-100mg/L, and 2# oil is used as a foaming agent in an amount of 1-4 μ L/L.
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| CN113634375A (en) * | 2021-08-13 | 2021-11-12 | 西安建筑科技大学 | Beneficiation method for low-grade mixed copper oxide ore |
| CN115487932B (en) * | 2022-09-26 | 2024-04-09 | 昆明理工大学 | Method for surface pretreatment-xanthate flotation of silicate copper oxide ore |
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| WO2008048495A2 (en) * | 2006-10-13 | 2008-04-24 | Archer-Daniels-Midland Company | Hydrogenation process and high monoene compositions obtained therefrom |
| CN105363565A (en) * | 2015-11-11 | 2016-03-02 | 湖南有色金属研究院 | Malachite catalytic activating agent and method for flotation of malachite through malachite catalytic activating agent |
| CN108479827A (en) * | 2018-04-03 | 2018-09-04 | 太原理工大学 | Medium temperature hydrolyzation converts carbonyl sulfur and the difunctional coupled catalyst of deoxidation and preparation method |
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| GB815088A (en) * | 1954-07-12 | 1959-06-17 | Phillips Petroleum Co | Improvements in a process for the production of halogenated hydrocarbons |
| CN101125311B (en) * | 2007-09-24 | 2010-09-01 | 昆明理工大学 | Vulcanizing-flotation combing method for treating zinc kiln slag |
| KR101572861B1 (en) * | 2014-08-21 | 2015-12-01 | 한국세라믹기술원 | A method of flotation for copper oxide ore using multi-collector |
| CN105363562B (en) * | 2015-12-08 | 2017-10-17 | 中南大学 | A kind of beneficiation method of low-grade cuprite |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008048495A2 (en) * | 2006-10-13 | 2008-04-24 | Archer-Daniels-Midland Company | Hydrogenation process and high monoene compositions obtained therefrom |
| CN105363565A (en) * | 2015-11-11 | 2016-03-02 | 湖南有色金属研究院 | Malachite catalytic activating agent and method for flotation of malachite through malachite catalytic activating agent |
| CN108479827A (en) * | 2018-04-03 | 2018-09-04 | 太原理工大学 | Medium temperature hydrolyzation converts carbonyl sulfur and the difunctional coupled catalyst of deoxidation and preparation method |
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