Method and system for treating sodium jarosite residue

A technology of yellow sodium iron vanadium and desulfurizer, which is applied in the chemical industry and can solve the problems of land occupation, environmental pollution, loss, etc.

Inactive Publication Date: 2016-10-26
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of nickel, cobalt, and copper hydrometallurgy, the jarosite method is often used to remove iron in the solution, so the waste residue contains a certain amount of valuable metals such as nickel, cobalt, and copper, and this part of the metal is covered by jarosite. Entrainment of parcels, resulting in loss
If a large amount of jarosite waste residue is piled up for a long time without treatment and utilization, it will occupy land, waste resources and pollute the environment
[0003] However, the current process of treating jarosite slag still needs to be improved

Method used

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  • Method and system for treating sodium jarosite residue
  • Method and system for treating sodium jarosite residue

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Using jarosite slag with 28% iron grade, 2.5% nickel grade and 10.5% sulfur grade as raw material, the fixed carbon content of the reduced coal is 75%, marl is used as desulfurizer, and its calcium oxide content is 52%. The raw coal is blended in according to the C / O ratio of 1.0, and the marl is blended in according to the Ca / S ratio of 1.0. The above materials are mixed evenly, pressed into pellets, dried and put into the reduction furnace. The temperature in the furnace is 1180°C, and the reduction time is 26min. The reduced product can be magnetically separated to obtain ferronickel particles, wherein the grade of nickel reaches 19%, the recovery rate can reach 95%, and the desulfurization rate is 97%.

Embodiment 2

[0059] Use jarosite slag with 23% iron grade, 3.8% nickel grade and 11.8% sulfur grade as raw material, the fixed carbon content of the reduced coal is 82%, the desulfurizer is a mixture of calcium carbide slag and salt mud, and the reduced coal is based on C / The O ratio is 0.6, and the mixture of calcium carbide slag and salt mud is mixed according to the Ca / S ratio of 1.2. The above materials are mixed evenly, pressed into pellets, dried and put into the reduction furnace. The temperature in the furnace is 1350 ° C, and the reduction time is 20min. The reduced product can be magnetically separated to obtain ferronickel particles, wherein the nickel grade reaches 30%, the recovery rate can reach 98%, and the desulfurization rate can reach 97.8%.

Embodiment 3

[0061] Using jarosite slag with iron grade of 25%, nickel grade of 3.0%, and sulfur grade of 8.2% as raw material, the fixed carbon content of the reduced coal is 66%, calcium carbonate slag is used as the desulfurizer, and the reduced coal is formulated according to the C / O ratio of 0.8 Add marl according to the Ca / S ratio of 0.8, mix the above materials evenly, press them into pellets, dry them and put them in the reduction furnace. The temperature in the furnace is 1450°C, and the reduction time is 15 minutes. The reduced product can be subjected to dry magnetic separation to obtain ferronickel particles, in which the grade of nickel reaches 25%, the recovery rate can reach 97%, and the desulfurization rate can reach 96.5%.

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Abstract

The invention discloses a method and a system for treating sodium jarosite residue. The method comprises the following steps: (1) calcining a mixture containing the sodium jarosite residue, a reducing agent and a desulfurizing agent to obtain a calcined product; and (2) conducting magnetic separation on the calcined product to separate out ferronickel particles. The system comprises a calcination device suitable for calcining the mixture containing the sodium jarosite residue, the reducing agent and the desulfurizing agent, and a magnetic separation device connected with the calcination device and suitable for magnetic separation of the calcined product. The method and the system disclosed by the invention can effectively recover the ferronickel particles in the sodium jarosite residue, and achieve the purpose of desulfurization, wherein the nickel grade of the ferronickel particles is relatively high.

Description

technical field [0001] The invention relates to the field of chemical industry. Specifically, the present invention relates to a method and system for treating yellow sodium iron vanadium slag. Background technique [0002] In hydrometallurgy and inorganic chemical production, when there is a large amount of iron to be removed, the iron removal process of jarosite with good filtration performance is widely used at present. The jarosite method is to oxidize iron into trivalent iron ions first, and the ferric ions contain Na + 、K + , NH 4 + 、Ag + 、H 3 o + In the plasma sulfate solution, it is easy to form a compound and crystallize and precipitate out to obtain jarosite slag. With the different hydrometallurgical systems, there are 5-8% Fe(OH) in the iron removal process of jarosite slag 3 Formed, this colloidal precipitation has a strong adsorption capacity for non-ferrous metal ions. In the process of nickel, cobalt, and copper hydrometallurgy, the jarosite method ...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B7/00
CPCC22B1/02C22B7/001Y02P10/20
Inventor 王欣刘占华曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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