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A method for efficient and comprehensive recycling of iron-rich smelting tailings

A technology of mine tailings and rich iron, applied in the field of comprehensive recycling and utilization of waste resources, can solve the problems of difficulty in recycling, affecting the survival output of aquatic organisms and irrigated crops, and losing too many resources.

Active Publication Date: 2021-05-18
广东利昌新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is relatively simple, but when this method is used to treat tailings, the amount of metals obtained is small, the production capacity is low, and many resources are lost, which seriously pollutes water sources and seriously affects the survival and yield of aquatic organisms and irrigated crops.
[0006] (3) Traditional smelting methods (including fire method, wet method and electrochemical method) are used for treatment. Due to the richness of elements in smelting tailings and the valence forms of valuable metals in them are very different from traditional raw materials, traditional When processing smelting tailings with advanced technology and equipment, the economic benefits are poor, and it is difficult to achieve complete recycling

Method used

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  • A method for efficient and comprehensive recycling of iron-rich smelting tailings
  • A method for efficient and comprehensive recycling of iron-rich smelting tailings
  • A method for efficient and comprehensive recycling of iron-rich smelting tailings

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Effect test

Embodiment 1

[0024] This embodiment provides a method for efficient comprehensive recycling of iron-rich smelting tailings (see figure 1 ), including the following steps:

[0025] (1) With copper smelting tailings as raw material, the Fe content in the raw material is 41% (see Table 1 for its specific composition), and is mixed in by mass ratio: coal powder 15% and lime 5% (coal powder is a common commercially available product , the lime is metallurgical lime meeting the requirements of YB / T 042-2014). After the materials are mixed, they are smelted at a high temperature in a rotary kiln. The temperature in the furnace is controlled at 1100-1250 ° C. The volatile substances in the raw materials are volatilized into the soot. The composition of the soot in the rotary kiln is shown in Table 1. The soot is collected after cooling and used as raw material for non-ferrous smelting use.

[0026] (2) The kiln slag is crushed and magnetically separated to obtain carbon-containing tailings and r...

Embodiment 2

[0030] This embodiment provides a method for efficient and comprehensive recycling of iron-rich smelting tailings, which specifically includes the following steps:

[0031] (1) Take lead smelting tailings as raw material, Fe content in the raw material is 29% (see Table 1 for its specific composition), and mix in according to mass ratio: coal powder 12.5% ​​and lime 6%. After the materials are mixed, they are smelted at a high temperature in a rotary kiln. The temperature in the furnace is controlled at 1100-1250 ° C. The volatile substances in the raw materials are volatilized into the soot. The composition of the soot in the rotary kiln is shown in Table 1. The soot is collected after cooling and used as raw material for non-ferrous smelting use.

[0032] (2) The kiln slag is crushed and magnetically separated to obtain carbon-containing tailings and reduced iron powder (see Table 1 for its specific composition). The carbon-containing tailings can be used as raw materials fo...

Embodiment 3

[0036] This embodiment provides a method for efficient and comprehensive recycling of iron-rich smelting tailings, which specifically includes the following steps:

[0037](1) Copper ore beneficiation tailings are used as raw materials, and the Fe content in the raw material is 21%. The tailings and iron ore (Fe content is 56%) are mixed at a ratio of 1:1. After mixing, the Fe content is 38.5%. The specific ingredients are shown in Table 1. And according to the mass ratio: coal powder 15% and lime 5%. After the materials are mixed, they are smelted at a high temperature in a rotary kiln. The temperature in the furnace is controlled at 1100-1250 ° C. The volatile substances in the raw materials are volatilized into the soot. The composition of the soot in the rotary kiln is shown in Table 1. The soot is collected after cooling and used as raw material for non-ferrous smelting use.

[0038] (2) The kiln slag is magnetically separated by ball mill to obtain carbon-containing ta...

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Abstract

The patent of the present invention belongs to the field of comprehensive recycling of waste resources, and discloses a method for efficient and comprehensive recycling of iron-rich smelting tailings: first, the smelting tailings are mixed with coal powder or coke powder and then subjected to high temperature in a rotary kiln. In smelting, the tailings are modified during the high-temperature smelting process to generate kiln slag; then, the kiln slag is crushed and magnetically separated to obtain carbon-containing tailings and reduced iron powder, which can be used as raw materials for the cement industry or brick factory After the reduced iron powder is mixed with a certain amount of reducing agent and flux, it is reduced and smelted in an induction furnace, and the molten iron generated by the reduction is cast into an anode plate, and the generated slag and soot are collected and recycled according to their richness. Utilization; Finally, the anode plate produces electrolytic iron by electrolysis, while other rich elements are enriched in the anode slime. The method realizes harmless, high-value, and low-cost comprehensive recycling of iron-rich smelting tailings, and solves the environmental protection problems caused by mining and smelting tailings.

Description

technical field [0001] The invention relates to the field of comprehensive recovery and utilization of waste resources, in particular to a method for comprehensive recovery and utilization of smelting tailings with high efficiency. Background technique [0002] A large amount of tailings are inevitably formed in the mineral processing and smelting industry. Since all valuable metals cannot be completely extracted during the mineral processing or smelting process, this kind of tailings contains some valuable metals to varying degrees, but the content is generally lower. When traditional metallurgical or chemical processes are used to treat metallurgical tailings, it is difficult to carry out effective comprehensive recycling, resulting in a large amount of metallurgical tailings being discarded. [0003] At present, there are mainly the following methods for the treatment of smelting tailings: [0004] (1) Use mining and metallurgy tailings to fill the roadbed, produce ceme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/06C22B7/00C04B7/147
CPCC04B7/147C22B7/00C25C1/06Y02P10/20Y02P40/10
Inventor 曾纪斌
Owner 广东利昌新材料有限公司