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Method for recycling iron-containing and zinc-containing solid waste

A technology for solid waste and iron powder, applied in recycling technology, mechanical material recovery, solid separation, etc., can solve the problems of low sorting efficiency, poor reference, poor product quality, etc., to improve the extraction rate and temperature. , the effect of saving development

Inactive Publication Date: 2021-09-17
苏州威固环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process separation efficiency in the prior art is low, the product quality is poor, iron concentrate powder contains part of zinc, and high carbon contains part of iron, which has poor reference

Method used

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  • Method for recycling iron-containing and zinc-containing solid waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A method for recycling iron-containing and zinc-containing solid waste, its work flow is as follows figure 1 shown, including the following steps:

[0050]First, water vapor and air are sent into the rotary kiln at a volume ratio of 1:20, and the water vapor and air react with the anthracite to generate Zn steam, which can quickly increase the temperature of the rotary kiln to 1350-1500°C, and then The solid waste containing iron and zinc is sent to the rotary kiln for smelting to obtain zinc oxide flue gas and kiln slag; the zinc oxide flue gas is discharged from the rotary kiln and then settles in the settling chamber, cooled by the surface cooling equipment, and then dedusted by the bag dust removal system , to obtain zinc oxide, and the remaining flue gas enters the desulfurization system and then discharges up to the standard. The content of zinc oxide obtained in this example is 53%, which can provide zinc raw materials for electrolytic zinc plants.

[0051] Col...

Embodiment 2

[0057] A method for recycling iron-containing and zinc-containing solid waste, comprising the following steps:

[0058] First, water vapor and air are sent into the rotary kiln at a ratio of 1:15 by volume, and the water vapor and air react with the anthracite in it to generate Zn steam, which can quickly increase the temperature of the rotary kiln to 1350-1500°C, and then The solid waste containing iron and zinc is sent to the rotary kiln for smelting to obtain zinc oxide flue gas and kiln slag; the zinc oxide flue gas is discharged from the rotary kiln and then settles in the settling chamber, cooled by the surface cooling equipment, and then dedusted by the bag dust removal system , to obtain zinc oxide, and the remaining flue gas enters the desulfurization system and then discharges up to the standard. The content of zinc oxide obtained in this example is 50%, which can provide zinc raw materials for electrolytic zinc plants.

[0059] Collect the kiln slag in the rotary k...

Embodiment 3

[0065] A method for recycling iron-containing and zinc-containing solid waste, comprising the following steps:

[0066] First, water vapor and air are sent into the rotary kiln at a volume ratio of 1:25, and the water vapor and air react with the anthracite to generate Zn steam, which can quickly increase the temperature of the rotary kiln to 1350-1500°C, and then The solid waste containing iron and zinc is sent to the rotary kiln for smelting to obtain zinc oxide flue gas and kiln slag; the zinc oxide flue gas is discharged from the rotary kiln and then settles in the settling chamber, cooled by the surface cooling equipment, and then dedusted by the bag dust removal system , to obtain zinc oxide, and the remaining flue gas enters the desulfurization system and then discharges up to the standard. The content of zinc oxide obtained in this example is 54%, which can provide zinc raw materials for electrolytic zinc plants.

[0067] Collect the kiln slag in the rotary kiln, send...

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Abstract

The invention provides a method for recycling iron-containing and zinc-containing solid waste, and relates to the field of metal solid waste treatment and resource utilization. The method for recycling the iron-containing and zinc-containing solid waste comprises the following steps that the iron-containing and zinc-containing solid waste is firstly smelted, and zinc oxide flue gas and kiln slag are obtained; the kiln slag is crushed, then first-stage ball milling and first-stage magnetic separation are carried out, and tailings 1 and first-stage concentrate are obtained; the first-stage concentrate is subjected to concentration magnetic separation, second-stage ball milling and second-stage magnetic separation, and tailings 2 and second-stage concentrate are obtained; the second-stage concentrate is subjected to gravity separation, and gravity separation tailings and gravity separation concentrate are separated out; the gravity separation tailings are subjected to third-stage magnetic separation, tailings 3 and third-stage concentrate are obtained, and the third-stage concentrate is filtered to obtain iron fine powder; and the gravity concentrate is filtered, dried and graded, and low-grade reduced iron powder and high-grade reduced iron powder are obtained. According to the method, the extraction rate of a zinc element and an iron element is increased, and maximization of economic benefits is achieved.

Description

technical field [0001] The invention relates to the field of metal solid waste treatment and resource utilization, in particular to a method for recycling iron-containing and zinc-containing solid waste. Background technique [0002] Tailings disposal has always been a long-standing problem for mining enterprises. The exposed problems are not only the safety of tailings dams, but also reflect the contradiction between traditional extensive economic growth mode and new industrialization road, resource shortage and sustainable development. At present, the comprehensive utilization of tailings has become a long-term national policy in the future of our country. In recent years, with the rapid development of the iron and steel industry, the amount of industrial waste gas, waste water and waste residue has increased year by year, and the amount of tailings and waste rock discharged every year in the world is as high as 10 billion tons. my country is a big steel producing country...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/06C22B19/30C22B19/38
CPCB03B9/06C22B19/30C22B19/38Y02W30/52Y02P10/20
Inventor 赵争争牛俊岭梁海洋李书元
Owner 苏州威固环境技术有限公司
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