An environmentally friendly and efficient resource recovery process for low-grade matte slag

A resource recovery, low-grade technology, applied in the direction of process efficiency improvement, etc., can solve the problems of difficult Fe slag treatment, separation and purification, high leaching costs, etc., to achieve resource recovery, reduce the amount of ore to be processed, and achieve high economic efficiency. value effect

Active Publication Date: 2018-07-17
GUANGZHOU ZHONGKE ZHENGCHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through literature research and industrial investigation, it can be seen that the current treatment process for matte slag is mainly direct leaching, and the amount of ore to be processed is large, resulting in high leaching costs.
Secondly, due to the high content of Fe in the matte slag, it is difficult to separate and purify Fe in the leach solution, the process is complicated, and the treatment of Fe slag produced by industrial applications is difficult.

Method used

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  • An environmentally friendly and efficient resource recovery process for low-grade matte slag

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Experimental program
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Effect test

Embodiment 1

[0019] A kind of processing technology for the copper matte slag roasting and magnetic separation to recover iron and enrich other metal resources. The matte slag produced by a factory in Chenzhou, Hunan Province is used. The elemental composition analysis is shown in Table 1. The Fe content in the matte slag reaches 48.62%. . Take 30kg sample crushed ball mill to 100%<0.0744mm, magnetic separation with 500GS magnetic field intensity, the iron concentrate rate is 19.22%, and the Fe grade of concentrate reaches 69.39%.

[0020] Table 1 Elemental analysis of matte slag (%)

[0021] Cu

[0022] After the magnetic separation tailings are dehydrated, dried and pulverized, the reduced coal powder, sodium humate, and bentonite are added in a ratio of 1:0.2:0.05:0.05, respectively, and stirred and mixed, and then magnetized and roasted in a laboratory rotary kiln at 750 °C. After 60min, the roasting material is ball-milled and magnetically separated, the iron concentrate ra...

Embodiment 2

[0028] The matte slag produced by a factory in Zhuzhou City, Hunan Province was used, and the elemental analysis is shown in Table 3.

[0029] Table 3 Elemental analysis of matte slag (%)

[0030] Cu

Pb

Zn

Ag

Fe

W

0.59

2.07

7.72

0.005

40.35

2.31

[0031] Weigh 30kg of samples and crush them to 100%<0.0744mm, and magnetically separate them with 500GS magnetic field. The iron concentrate rate is 25.11%, and the Fe grade of the concentrate reaches 65.17%.

[0032] After the magnetic separation tailings are dehydrated, dried and pulverized, reduced coal powder, sodium humate and bentonite are added in a weight ratio of 1:0.2:0.05:0.05, respectively, and stirred and mixed, and magnetized in a laboratory rotary kiln at 750 °C. After roasting for 60min, the roasting material is ball-milled and then magnetically separated. The iron concentrate rate is 42.0%, which is 31.45% of the original processing capacity, and the iron concent...

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Abstract

The invention discloses an environment-friendly efficient resource recovery process for low-grade matte slag and belongs to the field of solid waste recycling. The environment-friendly efficient resource recovery process comprises the following steps: (1) crushing and ball-milling matte slag, and adding reducing Fe in the magnetic separation and recovery production process; (2) dehydrating the magnetic separation mineral tailings obtained in the step (1) through a ceramic filter, then drying and crushing, adding reducing coal powder, sodium humate and bentonite, uniformly stirring and pelletizing; (3) reducing and calcining balls obtained in the step (2), and then performing ball milling and magnetic separation. The environment-friendly efficient resource recovery process adopts magnetic separation, pelleting, reducing and calcining processes which are all low-cost treatment methods, and as the recovered reducing Fe and magnetic iron ore concentrate accounts for 40-60% of the total quantity of matte slag, a high economic value is achieved, and a novel method is provided for comprehensive utilization of high-iron low-grade matte slag.

Description

technical field [0001] The invention relates to a solid waste recycling process, belonging to the technical field of resource recycling, in particular to an environment-friendly and efficient resource recycling process of low-grade matte slag. Background technique [0002] The matte slag is a by-product of the secondary resource recovery process. The typical composition of the matte slag is: Cu 2-5%, Pb3-10%, Zn 3-10%, Ag 0.01-0.06%, Fe 35-60% . [0003] According to the analysis, 30%-50% of the iron in the matte slag is in the form of elemental iron. Through literature research and industrial investigation, it can be seen that the current process for the treatment of matte slag is mainly direct leaching. Secondly, due to the high Fe content in the matte slag, the separation and purification of Fe in the leaching solution is difficult, the process is complex, and the Fe slag produced by industrial application is difficult to handle. SUMMARY OF THE INVENTION [0004] The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B13/00C22B15/00C22B19/30C22B11/00
CPCC22B7/005C22B7/04C22B11/023C22B13/025C22B15/00C22B19/30Y02P10/20
Inventor 晏波陈涛肖贤明
Owner GUANGZHOU ZHONGKE ZHENGCHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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