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Method for recycling iron in multilevel magnetic separation mode from zinc hydrometallurgy process

A technology of hydrometallurgy and magnetic separation, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve problems such as loss of valuable metals, high hardness, and difficulty in recycling

Active Publication Date: 2012-08-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high calcination temperature, the elements in the slag mainly exist in the form of alloys or silicate compounds, and the phases of each substance are closely embedded, and the hardness of the slag is relatively high, which is difficult to recycle, resulting in the loss of valuable metals

Method used

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  • Method for recycling iron in multilevel magnetic separation mode from zinc hydrometallurgy process
  • Method for recycling iron in multilevel magnetic separation mode from zinc hydrometallurgy process
  • Method for recycling iron in multilevel magnetic separation mode from zinc hydrometallurgy process

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Effect test

Embodiment 1

[0023] A: According to image 3 According to the technological process, the high-iron zinc calcine reduction roasting product is dried and then added with water to make a slurry, the liquid-solid mass ratio is 20:1, and the speed of the planetary ball mill is controlled as primary ball milling: 250-260r / min, secondary ball milling: 200~220r / min, ball milling time is 10~20min; adjust the magnetic field intensity of Davis magnetic separation tube to magnetic separation I: 0.11~0.12T, magnetic separation II: 0.060~0.065T, magnetic separation III: 0.15~0.16T, Magnetic separation IV: 0.14 ~ 0.15T, the magnetic separation time of magnetic separation I and magnetic separation II is 10min ~ 20min, the magnetic separation time of magnetic separation III and magnetic separation IV is 30 ~ 40min; the dispersant sodium hexametaphosphate The concentration of 5mg / L in the slurry is added; after adding the dispersant, the slurry mixing process is to stir at a speed of 400-800r / min for 10-20m...

Embodiment 2

[0029] A: According to image 3 According to the technical process, the high-iron zinc calcine reduction roasting product is dried and then added with water to make a slurry, the liquid-solid mass ratio is 25:1, and the speed of the planetary ball mill is controlled as primary ball milling: 240-260r / min, secondary ball milling: 200~220r / min, ball milling time is 5~15min; adjust the magnetic field intensity of Davis magnetic separation tube to magnetic separation I: 0.10~0.11T, magnetic separation II: 0.050~0.065T, magnetic separation III: 0.15~0.16T, Magnetic separation IV: 0.14 ~ 0.15T, the magnetic separation time of magnetic separation I and magnetic separation II is 10min ~ 20min, the magnetic separation time of magnetic separation III and magnetic separation IV is 30 ~ 40min; the dispersant sodium hexametaphosphate The concentration of 5mg / L in the slurry is added; after adding the dispersant, the slurry mixing process is to stir at a speed of 400-800r / min for 10-20min. ...

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Abstract

The invention discloses a method for recycling iron in multilevel magnetic separation mode from a zinc hydrometallurgy process. Reduction roasting products of high iron and zinc calcine are chosen as raw materials, raw material slurry once ball milled is treated by primary magnetic separation through a magnetic field of moderate strength, and then obtained concentrate is secondary ball milled and dispersed to perform fine separation through a weak magnetic field to achieve iron enrichment ore concentrate. Primarily-separated and finely-separated tailings are magnetically separated through a strong magnetic field to obtain zinc enrichment tailings, and concentrate magnetically separated by the strong magnetic field returns to the steps of secondary ball milling, dispersing and weak magnetic separation to be separated again. The method can adjust strength of different magnetic fields according to different magnetic separation processes, reduces magnetic mixing and non-magnetic mixing in a fine separation process and greatly improves selectivity. Simultaneously, processes of ball milling and dispersing are added, thereby avoiding magnetic flocculation in a traditional single-level magnetic separation process and improving separation efficiency. The problems that a traditional zinc hydrometallurgy process is difficult in iron and zinc separation, large in environmental pollution, seriously waste in zinc and iron elements and the like are effectively resolved.

Description

Technical field: [0001] The invention belongs to the intersection field of metallurgical engineering and environmental engineering, and specifically relates to a method for recovering iron by multi-stage magnetic separation from traditional zinc hydrometallurgy high-iron-zinc calcine. Background technique: [0002] High-iron zinc calcine is a zinc smelting intermediate product rich in impurity iron obtained after high-iron zinc sulfide concentrate is roasted. With the continuous development and expansion of the zinc smelting industry and the increasing demand for zinc in economic construction, the reserves of zinc mineral resources are decreasing day by day, and the application of low-grade high-iron zinc concentrates is becoming more and more common. The efficient separation of zinc and the recovery of iron resources from the zinc smelting process have become problems to be solved urgently. [0003] High-iron zinc sulfide concentrate usually refers to zinc sulfide concentr...

Claims

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Application Information

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IPC IPC(8): B03C1/02B03C1/005B02C17/00
Inventor 柴立元彭兵彭宁李密王纪明闫缓
Owner CENT SOUTH UNIV
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