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Comprehensive utilization method of copper smelting tailings

A technology for tailings and copper smelting, which is applied in the field of comprehensive utilization of copper-smelting tailings, can solve the problems of short supply of blast furnace water slag and steel slag, ineffective and rational utilization, strong demand for cement consumption, etc. Efficient resource utilization and good effect of cascade utilization

Active Publication Date: 2019-02-05
HUBEI DABEIJIANG ENVIRONMENTAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the restrictions imposed by the national environmental protection policy and the policy orientation of reducing production capacity in some highly polluting industries, the demand for cement consumption is strong, and the supply of blast furnace slag and steel slag is in short supply; , cannot be effectively and rationally utilized, and has become a technical bottleneck restricting the sustainable development of industries such as non-ferrous smelting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Firstly, the EAF copper smelting tailings with copper content and iron content of 1.5% and 35.5%, respectively, adopt a self-grinding process and a semi-self-grinding closed-circuit classification process to obtain a slurry of -0.045mm accounting for 78%; choose float The selection process is a closed-circuit flotation process of primary roughing, second sweeping and three times of selection, to obtain copper concentrate grade, and electric furnace copper smelting tailings and then tailings. The EAF copper smelting tailings are re-selected. After three magnetic separations, the magnetic field strengths are respectively selected as 2100Oe, 4500Oe, 9200Oe, and the EAF copper smelting tailings with iron content of 42.2%, 37.8%, 31.5% and 28.6% are obtained. Then choose the tailings. The copper smelting tailings of the electric furnace after magnetic separation are then selected for tailings. One or more of them are added with 1.2% sodium sulfate and 0.03% triethanolamine re...

Embodiment 2

[0026] First, the converter copper smelting tailings with copper content and iron content of 2.8% and 38.2%, respectively, are subjected to a self-grinding process and a semi-self-grinding closed-circuit classification process to obtain a slurry of -0.074mm accounting for 90%; The selection process is a closed-circuit flotation process of primary roughing, second sweeping and three times of selection, to obtain copper concentrate grade, and electric furnace copper smelting tailings and then tailings. The converter copper smelting tailings are re-selected. After three times of magnetic separation, the magnetic field strength is selected as 2050 Oe, 4300 Oe, 9000 Oe respectively, and the converter copper smelting tailings with iron content of 43.5%, 38.2%, 32.6% and 28.3% are obtained. Then choose the tailings. After magnetic separation, the converter copper smelting tailings are re-selected. One or more of them are added with 0.9% sodium sulfate and 0.04% triethanolamine respect...

Embodiment 3

[0028] First, the copper smelting tailings of the electric furnace and the converter with the copper content and iron content of 1.9% and 36.7%, respectively, are used to adopt three-stage one-closed-circuit crushing and screening process and two-stage one-closed-circuit grinding and classification process to obtain -0.074mm accounted for 86% of the slurry; the selected flotation process is a closed-circuit flotation process of primary roughing, secondary sweeping and three selected to obtain copper concentrate grade, and mixed copper smelting tailings and then tailings. The mixed copper smelting tailings are re-selected after three times of magnetic separation. The magnetic field strengths are respectively selected as 2100Oe, 4200Oe, 9300Oe, and the mixed copper smelting tailings with iron content of 40.6%, 37.2%, 32.2% and 28.1% are obtained. Then choose the tailings. The mixed copper smelting tailings after magnetic separation are then selected for tailings. One or more of t...

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Abstract

The invention discloses a comprehensive utilization method of copper smelting tailings. The method comprises the following steps that (1) after the copper smelting tailings are sieved and classified as raw materials, pulverized materials of the copper smelting tailings are obtained, and then the pulverizing materials are subjected to flotation to obtain copper concentrate; (2) copper smelting tailing recleaning gangue obtained after the copper concentrate is obtained through flotation in the step (1) is used as a raw material, magnetic plants with different magnetic field strengths are used for magnetic separation, iron-bearing copper smelting tailing recleaning gangue in different steps is obtained, and the iron-bearing copper smelting tailing recleaning gangue with different iron-bearinggrades is concentrated and filtered or dried and dehydrated to obtain iron-bearing copper smelting tailing recleaning gangue powder with different iron-bearing grades; and (3) the iron-bearing coppersmelting tailing recleaning gangue powder obtained in the step (2) is mixed with an annexing agent to be subjected to ball grinding mechanochemistry activation, and solid activated copper smelting tailing fine powder is obtained to serve as a blend of cement. The comprehensive utilization method realizes efficient utilization of the copper smelting tailings, is strong in applicability, is green and environment-friendly, and is reliable in operation.

Description

【Technical Field】 [0001] The invention relates to the technical field of non-metallic mineral materials, in particular to a method for comprehensive utilization of copper smelting tailings. 【Background technique】 [0002] At present, most domestic and foreign cement blending materials use blast furnace water slag, such as water quenching slag after iron ore smelting in blast furnace, or part of steel slag, which is ground and used as raw material for cement blending. However, due to the restrictions of the national environmental protection policy requirements and the policy orientation of reducing production capacity in some high-polluting industries, the demand for cement consumption is strong, and the supply of blast furnace water slag and steel slag exceeds supply; on the other hand, copper smelting tailings are used as solid waste from non-ferrous smelting , Cannot be effectively and rationally used, and has become a technical bottleneck restricting the sustainable developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00C04B7/14C04B7/38C22B7/04C22B15/00
CPCB03B7/00C04B7/14C04B7/38C22B7/001C22B7/04C22B15/00Y02P10/20Y02P40/10
Inventor 谌宏海罗立群廖广东蹇守卫黄红王珊涂序周鹏飞
Owner HUBEI DABEIJIANG ENVIRONMENTAL TECH CO LTD
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