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Comprehensive dust recovery method for ferroalloy electric furnace

A technology for collecting dust and iron alloys, applied in the direction of improving process efficiency, etc., can solve problems such as waste, low recovery rate, and large dust loss, and achieve the effect of ensuring normal stability and significant economic benefits

Inactive Publication Date: 2012-10-24
云南昆欧科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its small particle size, the dust loss is large, which pollutes the operating environment of the electric furnace
At the same time, the recovery rate is low (<60%), which affects the normal operation process of the electric furnace, and the associated valuable metals are also wasted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: The dust collection ash provided by a manganese alloy production enterprise in southern my country, the main components are: Mn: 27.00%, K: 10.01%, Fe: 3.02%, Cu: 0.03%, Pb: 6.50%, Zn: 1.37 %, Ge:660g / t, In:800g / t, Ga:40g / t.

[0023] Sampling 1000g, controlling the liquid-solid ratio 3:1, catalytic leaching at 80°C for 150min, filtering, washing, and drying to obtain 937g of the sample, the analysis of the solid composition is: Mn: 28.90%, K: 0.79%, Fe: 2.85%, Cu : 0.02%, Pb: 1.57%, Zn: 0.45%, Ga: 17g / t, Ge: 55g / t, In: 76g / t. The solution can effectively separate lead, zinc, gallium, germanium, indium, potassium and sodium. The solid phase can be dried and then returned to the electric furnace or directly prepared to produce electrolytic manganese.

Embodiment 2

[0024] Embodiment 2, the dust collection ash that a manganese alloy production enterprise in the north of my country provides, its main chemical composition is: Mn:33.50%, K:17.35%, Fe:5.24%, Cu:0.37%, Pb:3.82% , Zn: 4.05%, Ge: 1152g / t, In: 2175g / t, Ga: 89g / t.

[0025] Take a sample of 1000g, control the liquid-solid ratio to 3.5:1, add 50ppm of catalyst, the leaching temperature is 85°C, and the leaching time is 150min. After filtering and washing, dry to constant weight at 105°C, the amount of solid phase substance obtained is 890g, and its chemical composition is analyzed: Mn: 37.50%, K2.17%, Fe: 3.86%, Cu: 0.13%, Pb: 0.84%, Zn: 1.15%, Ge: 113g / t, In: 176g / t, Ga: 29g / t.

[0026] After the solid phase is dried, return to the electric furnace or directly prepare liquid to produce electrolytic manganese. Recovery of valuable elements from the solution has high value and significant economic benefits.

[0027] It has been verified by a small electric furnace that after remova...

Embodiment 3

[0029] Embodiment 3: the dust collection ash that a certain ferromolybdenum production enterprise in Shaanxi provides, its main component is: Mo:55.68%, K:9.97%, Fe:8.53%, Cu:0.45%, Pb:2.14%, Zn: 3.01%, Ge: 403g / t, In: 327g / t, Ga: 75g / t.

[0030] Sampling 1000g, liquid-solid ratio 3:1, add catalyst 35ppm, leave for 150min, temperature 90°C, after liquid-solid separation, weigh 948g of solid phase after drying, analyze its chemistry: Mo: 59.23%, K: 0.94% , Fe: 5.39%, Cu: 0.17%, Pb: 0.51%, Zn: 0.68%, Ge: 76g / t, In: 96g / t, Ga: 22g / t.

[0031] The solid phase returns to the electric furnace without hindrance.

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Abstract

A comprehensive dust recovery method for a ferroalloy electric furnace includes the steps of firstly, mixing recovered dust of the ferroalloy electric furnace into slurry, and controlling liquid-solid ratio to 3-4:1; secondly, adding catalyst at 40-60ppm, controlling operating temperature at 80-90 DEG C, and controlling leaching time to be 120-180 minutes; thirdly, filtering and washing, using liquid for recovering valued metals such as lead, zinc, gallium, germanium, indium, potassium and sodium; and fourthly, returning filtered residue to the electric furnace or directly producing liquid for manganese electrodeposition to produce electrolytic manganese. The comprehensive dust recovery method for the ferroalloy electric furnace has the advantages that by the method, normal and stable production can be guaranteed for the ferroalloy electric furnace, and comprehensive recovery of concomitant valued metals is achieved while recovery rate of the main metal is increased to more than 90%; and the comprehensive dust recovery method for the ferroalloy electric furnace has evident economic benefit.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of dust collected by ferroalloy electric furnaces. Background technique [0002] In addition to the main metal, the ferroalloy electric furnace dust often contains non-ferrous metals such as potassium, sodium, lead, zinc, germanium, and indium. For a long time, most of the collected dust is granulated and returned to the electric furnace for secondary smelting. Due to its small particle size, the dust loss is large, which pollutes the operating environment of the electric furnace. At the same time, the recovery rate is low (<60%), which affects the normal operation process of the electric furnace, and the associated valuable metals are also wasted. For this reason, our company has developed a process route to recover valuable elements from this dust and realize the comprehensive utilization of resources. Contents of the invention [0003] The purpose of this invention is ...

Claims

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Application Information

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IPC IPC(8): C22B7/02
CPCY02P10/20
Inventor 蒋朋钢何刚
Owner 云南昆欧科技有限责任公司
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