Method and system for treating iron vitriol slag

A technology of jarosite slag and drying zone, which is applied in the fields of energy and metallurgy, can solve the problems of high energy consumption by pyrotechnics, high content of dust and sulfur, and poor economic benefits.

Pending Publication Date: 2017-03-29
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Therefore, the existing technology has the disadvantages of high sulfur content in the dust obtained after the volatilization of iron-vanadium slag, poor economic benefits, and high energy consumption by pyrotechnics.

Method used

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  • Method and system for treating iron vitriol slag
  • Method and system for treating iron vitriol slag
  • Method and system for treating iron vitriol slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] The jarosite slag (the S content is 10-13%, the zinc content is 2-6%, and the lead content is 2-6%) is mixed with semi-coke and sodium carbonate, and the mixing ratio is 100:25:5. The particle size of semi-coke is 1mm, and the particle size of iron-vanadium slag is 200 mesh, accounting for more than 90%. After mixing, the material directly enters the vibrating screen distributor, and evenly distributes it into the bottom of the ring furnace. The regenerative radiant tube on the upper part of the furnace wall conducts radiation heat transfer to the furnace material, and the ingredients are proportioned. The amount of reduced coal is iron slag. 8%, the mixed material is sent into the segmented reduction furnace through the distribution device. It passes through the drying area, decomposition area, reduction area, and discharge area in sequence. The temperature in the drying zone is set at 500°C±20°C, and the time in the drying zone is 10 minutes. The surface water in th...

Embodiment 2

[0096] The jarosite slag (the S content is 10-13%, the zinc content is 2-6%, and the lead content is 2-6%) is mixed with semi-coke and sodium carbonate, and the mixing ratio is 100:25:5. The particle size of semi-coke is less than 2mm, and the particle size of iron-vanadium slag is 200 mesh, accounting for more than 90%. After mixing, the material directly enters the vibrating screen distributor, and evenly distributes it into the bottom of the ring furnace. The regenerative radiant tube on the upper part of the furnace wall conducts radiation heat transfer to the furnace material, and the ingredients are proportioned. The amount of reduced coal is iron slag. 8%, the mixed material is sent into the segmented reduction furnace through the distribution device. It passes through the drying area, decomposition area, reduction area, and discharge area in sequence. The temperature in the drying zone is set at 600°C±20°C, and the drying zone time is 10 minutes. The surface water in...

Embodiment 3

[0098] The jarosite slag (the S content is 10-13%, the zinc content is 2-6%, and the lead content is 2-6%) is mixed with semi-coke and sodium carbonate, and the mixing ratio is 100:32:8. The semi-coke particle size is 3mm, and the iron-vanadium slag particle size is 200 mesh, accounting for more than 90%. After mixing, the materials are pressed into balls to obtain carbon-containing mixed materials, which are directly fed into the vibrating screen distributor, and evenly distributed into the bottom of the ring furnace. The regenerative radiant tube on the upper part of the furnace wall conducts radiation heat transfer to the furnace materials, and the ingredients are proportioned. , the amount of reduced coal is 8% of the iron slag, and the mixed material is sent into the segmented reduction furnace through the distribution device. It passes through the drying area, decomposition area, reduction area, and discharge area in sequence. The temperature in the drying zone is set a...

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Abstract

The invention discloses a method and system for treating iron vitriol slag. The method for treating the iron vitriol slag comprises the steps that the iron vitriol slag containing water, reducing agents and additives are mixed so that wet mixed materials can be obtained; the wet mixed materials are treated in an annular furnace, specifically, the wet mixed materials are subjected to drying treatment in a drying area to obtain dried materials, vapor produced through drying treatment is discharged through a first flue and is recycled; the dried materials are subjected to decomposition treatment in a decomposition area to obtain decomposition products, flue gas which contains sulfur oxide and is produced through decomposition treatment is discharged through a second flue and collected; and the decomposition products are subjected to reduction treatment in a reduction area to obtain reduced products, flue gas which contains lead and zinc and is produced through reduction treatment is discharged through a third flue and collected, and the reduced products are subjected to ball milling and magnetic separation treatment so that metal iron powder and tailings can be obtained. By means of the method, the flue gas containing the sulfur oxide and the flue gas containing the lead and the zinc can be collected correspondingly, and high-grade fine iron powder is obtained.

Description

technical field [0001] The invention belongs to the field of energy and metallurgy, and in particular relates to a method and a system for processing ferosite slag. Background technique [0002] Auxin slag belongs to a kind of leaching slag produced in the process of zinc hydrometallurgy. The process used in zinc smelting is generally "roasting-leaching-purification-electrodeposition". Acid leaching - iron and vanadium iron removal treatment, the other 55% is roasted in a rotary kiln. Auxinite slag belongs to a kind of tailings produced in the vanadium precipitation process of "hot acid leaching - iron vanadium removal treatment (precipitation of vanadium)" in the process of zinc hydrometallurgy, that is, the iron element in the zinc leaching solution is selectively formed and precipitated, thereby To achieve the purpose of iron and zinc separation. Its main component is iron vanadium, and its molecular formula can be written as NaFe 3 (SO 4 ) 2 (OH) 6 , the total sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/10C22B7/04C22B7/02C22B13/00C22B19/30
CPCC21B13/008C21B13/105C22B7/02C22B7/04C22B13/00C22B19/30Y02P10/20
Inventor 吴道洪古明远王健月曹志成薛逊
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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