A comprehensive utilization method of copper smelting tailings

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

Active Publication Date: 2020-11-10
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 electric furnace copper smelting slag with copper content and iron content of 1.5% and 35.5%, respectively, adopts a self-grinding process and a closed-circuit classification process of semi-autogenous grinding to obtain a slurry of -0.045mm accounting for 78%; The selection process is a closed-circuit flotation process of primary roughing, secondary sweeping and triple selection to obtain the grade of copper concentrate, and re-select the tailings from the copper smelting tailings of the electric furnace. The electric furnace copper smelting tailings were re-selected tailings, and the magnetic field strength was selected as 2100Oe, 4500Oe, 9200Oe respectively after three times of magnetic separation, and the electric furnace copper smelting tailings with iron content of 42.2%, 37.8%, 31.5% and 28.6% were obtained Then choose the tailings. The electric furnace copper smelting tailings after magnetic separation are re-selected tailings, one or more of them a...

Embodiment 2

[0026] First, the converter copper smelting slag with copper content and iron content of 2.8% and 38.2% respectively, adopts a self-grinding process and a semi-autogenous 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, secondary sweeping and triple selection to obtain the grade of copper concentrate, and re-select the tailings from the copper smelting tailings of the electric furnace. The converter copper smelting tailings are re-selected tailings, and the magnetic field strength is selected as 2050Oe, 4300Oe, 9000Oe respectively after three times of magnetic separation to obtain converter copper smelting tailings with iron content of 43.5%, 38.2%, 32.6% and 28.3% Then choose the tailings. The converter copper smelting tailings after magnetic separation are re-selected tailings, and one or more of them are added respectively with 0.9% sodium sulfate and 0.0...

Embodiment 3

[0028] Firstly, the electric furnace and converter mixed copper smelting slag with copper content and iron content of 1.9% and 36.7% respectively, adopts three-stage one closed-circuit crushing and screening process and two-stage one closed-circuit grinding and grading process to obtain -0.074mm 86% slurry; the selected flotation process is a closed-circuit flotation process of primary roughing, secondary sweeping, and triple beneficiation to obtain the grade of copper concentrate, and mix copper smelting tailings to re-select the tailings. The mixed copper smelting tailings are re-selected tailings, and 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 re-selected tailings, and one or more of them are added respe...

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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 comprehensive utilization method of copper smelting tailings. 【Background technique】 [0002] At present, most of the cement blending raw materials at home and abroad use blast furnace slag, for example, the water-quenched slag after blast furnace ironmaking using iron concentrate, or the steel slag from some steelmaking, which is used as cement blending raw material after grinding. 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. There...

Claims

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Application Information

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Patent Type & Authority Patents(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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