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Nonferrous metal underground mine tailing iron extracting and sulfur reduction method

A technology of mine tailings and non-ferrous metals, which is applied in the processing field of beneficiation tailings, can solve the problems of short sales radius, high brick-making cost, and high production cost, so as to reduce production costs, eliminate environmental protection problems, and achieve zero emissions.

Active Publication Date: 2019-04-19
江西省宜丰万国矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the metallurgical process of non-ferrous metal underground mines, 60% to 70% of the beneficiation tailings are generally used for underground filling, and the rest are discharged into the tailings pond. However, the construction period of the tailings pond is long, the cost is high, and it involves demolition, A series of government approval procedures such as land acquisition, environmental impact assessment and safety assessment
In addition, beneficiation tailings can also be used as building materials, such as tailings to make bricks, but the cost of making bricks is high and the sales radius is short, and mines are generally far away from cities, making it difficult to achieve large-scale production, resulting in high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Taking a copper-lead-zinc ore dressing plant in Jiangxi Province as an example, the components and grades of the tailings produced by the dressing plant are: Fe: 16.648%, S: 2.44%, Al2O3: 7.216%, SiO2: 34.988%, it is recovered by adopting the method for increasing iron and reducing sulfur of the present invention, which comprises the following steps:

[0030] S1. First, grind the ore dressing tailings through a ball mill (model MQG3660), so that after grinding, the fineness is -74μm particle size accounts for 70%, and then transport it to the SLon-2000 type mine with a sand pump In the high-gradient magnetic separator, the magnetic separation tailings slurry with a yield of 60% and the tailings slurry with a yield of 40% were obtained after screening with a magnetic background field strength of 0.7T and a pulse frequency of 220 times / min. high iron concentrate;

[0031] S2. Use a sand pump to transport the magnetic separation tailings slurry in the S1 step to...

Embodiment 2

[0037] Example 2 Taking a copper-lead-zinc ore dressing plant in Jiangxi Province as an example, the components and grades of the tailings produced by the dressing plant are: Fe: 16.648%, S: 2.44%, Al2O3: 7.216%, SiO2: 34.988%, it is recovered by adopting the method for increasing iron and reducing sulfur of the present invention, which comprises the following steps:

[0038] S1. First, the ball mill (model MQG3660) grinds the beneficiation tailings, so that the fineness after grinding is -74μm particle size accounts for 75%, and then it is transported to the SLon-2000 high-speed tank with a sand pump In the gradient magnetic separator, the magnetic separation tailings slurry with a yield of 62% and the high-speed iron with a yield of 38% were obtained after screening with a magnetic background field strength of 0.8T and a pulse frequency of 220 times / min. Concentrate;

[0039] S2. Use a sand pump to transport the magnetic separation tailings slurry in the S1 step to the NZS-...

Embodiment 3

[0045] Example 3 Taking a copper-lead-zinc ore dressing plant in Hunan Province as an example, the components and grades of the tailings produced by the dressing plant are: Fe: 17.532%, S: 3.58%, Al 2 o 3： 4.78%, SiO 2： 52.142%, it is recovered by adopting the method for increasing iron and reducing sulfur of the present invention, which comprises the following steps:

[0046] S1. First, grind the beneficiation tailings through a ball mill (model MQG3660), so that the fineness after grinding is -74μm particle size accounts for 60%, and then use a sand pump to transport it to the SLon-2000 type In the high-gradient magnetic separator, the magnetic separation tailings slurry with a yield of 65% and the yield of 35% of high iron concentrate;

[0047] S2. Use a sand pump to transport the magnetic separation tailings slurry in the S1 step to the NZS-38 thickener for concentration treatment under the condition that the slurry feeding speed is 90t / h. When concentrating, add a mass...

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PUM

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Abstract

The invention relates to the technical field of processing of beneficiation tailings, in particular to a nonferrous metal underground mine tailing iron extracting and sulfur reduction method. The treatment method comprises the steps that iron-rich concentrate in the beneficiation tailings is screened with a high gradient magnetic separator, a thickener, a flotation column and a filter press; thenreasonable mixing is carried out to form a composite cement auxiliary material with the iron content greater than 35% and the sulfur content less than 1.5%; and solid waste generated in the treatmentprocess is transported to a tailing filling station for underground filling, wastewater is stored in an impounding reservoir of a beneficiation area to serve as production water. By means of the nonferrous metal underground mine tailing iron extracting and sulfur reduction method, the beneficiation tailings become the composite auxiliary raw material for cement burning, the whole treatment processhas no industrial wastewater and industrial solid waste efflux, new profit growth points can be increased for mining enterprises, and the method is green and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of ore dressing tailings processing, in particular to a method for increasing iron and reducing sulfur from nonferrous metal underground mine tailings. Background technique [0002] The comprehensive utilization of mineral raw materials is a complex scientific, technical and economical issue, which is closely related to all processes of mining and metallurgy (including geology, exploration, mining, mineral processing, metallurgy and metal processing, etc.). The research and application of waste-free technology to realize the comprehensive utilization of mineral raw materials is not only an important issue involving resources, energy and environmental protection, but also the fundamental way for enterprises to improve economic efficiency, and it is also the main trend of scientific research, design and production technology innovation of mining enterprises . Therefore, maximizing the recycling of mineral res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/06
CPCB03B9/06Y02W30/52
Inventor 曹荣恩邓志平黄广福陈中平轩辂文保林李志卫
Owner 江西省宜丰万国矿业有限公司