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Dressing-smelting combined process for recovering iron from copper slag flotation tailings

A combined technology of flotation tailings and dressing and smelting, which is applied to the improvement of process efficiency, wet separation, solid separation, etc., can solve the problems of complex process, long process, high energy consumption, etc., and achieve simple process and high iron recovery rate , high economic benefits

Pending Publication Date: 2021-11-02
WESTERN MINING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process uses copper slag to produce zinc oxide dust, ferroalloy products and glass-ceramics, the process is complicated, the process is long, and the energy consumption is high, and there is no explanation for the quality of the ferroalloy products and glass-ceramics produced

Method used

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  • Dressing-smelting combined process for recovering iron from copper slag flotation tailings
  • Dressing-smelting combined process for recovering iron from copper slag flotation tailings
  • Dressing-smelting combined process for recovering iron from copper slag flotation tailings

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing by specific embodiment:

[0019] In this embodiment: the chemical multi-element analysis results of the copper slag flotation tailings of a certain copper smelter are shown in Table 1 below:

[0020] Table 1 Chemical multi-element analysis results of copper slag flotation tailings in a copper smelter (unit / %)

[0021]

[0022] The recovery process proceeds in the following steps:

[0023] 1) Take 1 kg of copper slag flotation tailings from a copper smelter, and process them according to the process of magnetic separation Ⅰ → ore grinding Ⅰ → magnetic separation Ⅱ → grinding Ⅱ → magnetic separation Ⅲ → grinding Ⅲ → magnetic separation Ⅳ. The magnetic field strength of the process is 1900Oe, 1900Oe, 1700Oe, 1400Oe respectively, and the grinding fineness of the grinding process is -400 mesh accounting for 90%, -500 mesh accounting for 90%, -600 mesh accounting for 90%, and th...

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Abstract

The invention discloses a dressing-smelting combined process for recovering iron from copper slag flotation tailings. The dressing-smelting combined process comprises the following steps: obtaining magnetic concentrate through an ore grinding and magnetic separation method, mixing the magnetic concentrate with pulverized coal, carrying out deep reduction roasting, controlling the reduction temperature and time, carrying out ore grinding and magnetic separation on the roasted product to obtain reduced iron powder, and selling the reduced iron powder as scrap steel. The magnetic separation tailings are subjected to decarburization treatment, removed carbon can serve as pulverized coal, the tailings after decarburization and the magnetic separation tailings before roasting are mixed to serve as final tailings which can be used for cement production, and dust collected through deep reduction roasting can serve as zinc smelting raw materials. The whole process has the advantages of being simple, short in flow, low in energy consumption, economical, environmentally friendly, good in iron recovery effect, higher in economic benefit and the like.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal hydrometallurgy, in particular to a process for recovering iron from copper slag flotation tailings. Background technique [0002] At present, more than 90% of enterprises use pyrotechnics for copper smelting, and a large amount of copper slag (1 ton of copper produces about 3 tons of copper slag), including smelting slag and blowing slag, will be produced in the copper pyrometallurgical smelting process. The slag contains about 3-6% copper, the blowing slag contains about 10-12% copper, and the flash smelting slag contains about 1% copper. In view of the problem of high copper content in slag, most copper smelting enterprises adopt flotation process to recover copper, which is relatively mature at present. After flotation of copper slag, a large amount of flotation tailings will be produced. The tailings generally contain 40-45% iron and a small amount of copper, zinc, arsenic, and sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/04B03B7/00C22B1/02
CPCB03B9/04B03B7/00C22B1/02Y02P10/20
Inventor 马松勃王铧泰赖春华王鹏程王景凤孔德鸿胡生福张丽张慧婷
Owner WESTERN MINING CO LTD
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