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Method for comprehensively recovering valuable metals in goethite slag

A technology for goethite slag and valuable metals, which is applied in the field of comprehensive recovery of valuable metals in goethite slag, and can solve the problems of low volatilization rate of zinc and indium, high volatilization temperature of rotary kiln, and ineffective utilization of iron, etc. , to achieve huge environmental and economic benefits, realize resource utilization, and improve the effect of resource utilization

Active Publication Date: 2020-11-24
有研资源环境技术研究院(北京)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly has the following problems: 1) the volatilization rate of zinc and indium is not high, especially when there are many zinc ferrite phases in goethite slag, high temperature volatilization can not effectively decompose zinc ferrite to make zinc volatilize, resulting in Some zinc and indium are lost in the water-quenched slag, resulting in a waste of resources; 2) The rotary kiln has a high volatilization temperature, resulting in high energy consumption, which brings costs to the operation of the enterprise; 3) Iron is not effectively utilized; roasting The kiln slag is sold directly after water quenching, and the iron resources have not been effectively recycled.

Method used

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  • Method for comprehensively recovering valuable metals in goethite slag
  • Method for comprehensively recovering valuable metals in goethite slag
  • Method for comprehensively recovering valuable metals in goethite slag

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A goethite slag in Guangdong contains 36.88% iron, 12.08% zinc, and 0.02% indium. The main chemical test results and phase analysis results are shown in Table 1-3. The above-mentioned goethite slag 100g according to figure 1 As shown in the process flow, grind until the particle size is -200 mesh to -400 mesh, mix with calcium chloride 10g, carbon powder 45g and pelletize, the pellet particle size is 10-20mm, put it into the tube furnace for roasting , control the calcination temperature to 900°C and the calcination time to 2h. The volatilized zinc-indium dust is collected during the roasting process. After roasting, the obtained material is ground to a particle size of -200 mesh, and subjected to magnetic separation at a magnetic field strength of 200mT to obtain an iron ore concentrate product. During the experiment, it is necessary to detect and analyze the contents of zinc, indium and iron on the roasted materials, zinc-indium-containing dust, iron concentrate and...

Embodiment 2

[0038] A goethite slag in Guangdong contains 36.88% iron, 12.08% zinc, and 0.02% indium. The main chemical test results and phase analysis results are shown in Table 1-3. The above-mentioned goethite slag 100g according to figure 1 As shown in the process flow, grind until the particle size is -200 mesh to -400 mesh, mix with 5g of sodium chloride and 50g of carbon powder and pelletize, the pellet particle size is 10-20mm, put it into a tube furnace for roasting , control the calcination temperature to 900°C and the calcination time to 2h. The volatilized zinc-indium dust is collected during the roasting process. After roasting, the obtained material is ground to a particle size of -200 mesh, and subjected to magnetic separation at a magnetic field strength of 160mT to obtain an iron ore concentrate product. During the experiment, it is necessary to detect and analyze the contents of zinc, indium and iron on the roasted materials, zinc-indium-containing dust, iron concentrat...

Embodiment 3

[0041] A goethite slag in Guangdong contains 36.88% iron, 12.08% zinc, and 0.02% indium. The main chemical test results and phase analysis results are shown in Table 1-3. The above-mentioned goethite slag 100g according to figure 1 As shown in the process flow, grind until the particle size is -200 mesh to -400 mesh, mix with potassium chloride 15g, carbon powder 40g and pelletize, the pellet particle size is 10-20mm, put it into the tube furnace for roasting , control the calcination temperature to 900°C and the calcination time to 2h. The volatilized zinc-indium dust is collected during the roasting process. After roasting, the obtained material is ground to a particle size of -200 mesh, and subjected to magnetic separation at a magnetic field strength of 240mT to obtain an iron ore concentrate product. During the experiment, it is necessary to detect and analyze the contents of zinc, indium and iron on the roasted materials, zinc-indium-containing dust, iron concentrate a...

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Abstract

The invention provides a method for comprehensively recovering valuable metals in goethite slag. The method comprises the following steps: levigating the goethite slag, and proportioning the goethiteslag, chlorine-containing salt and carbon powder according to the mass ratio of 1: (0.05-1.0): (0.05-1.0); uniformly mixing the proportioned materials, and pelletizing, wherein the pellet diameter is10-20 mm; roasting and volatilizing at 500-1100 DEG C for 1-6 hours; collecting zinc-indium-containing dust generated in the volatilization process, thereby obtaining the roasted product; and after the reaction finishes, cooling the roasted product to room temperature, and grinding to the particle size of undersize of a 200-mesh sieve; and carrying out magnetic separation on the ground material toobtain the iron ore concentrate product, wherein the magnetic field intensity is 160-350 mT. The method provided by the invention can implement high-efficiency volatilization recovery of valuable metals zinc and indium in the goethite slag in a low-temperature hot field, and is coupled with the magnetic field to obtain the iron ore concentrate product. The method has the characteristics of high valuable metal recovery rate, low energy consumption and the like, and is simple to operate.

Description

technical field [0001] The invention relates to comprehensive recovery of valuable metals zinc, indium and iron in goethite slag, in particular, the invention relates to a method for comprehensive recovery of valuable metals in goethite slag. Background technique [0002] In the zinc hydrometallurgy process, especially the zinc oxygen pressure leaching process, iron is leached into the solution together with zinc as an impurity element. Iron is an impurity ion. If the concentration of iron in the solution is > 20mg / L, it will affect the electrowinning efficiency of zinc, increase the power consumption of the electrowinning process, and cause serious harm. Therefore, it is necessary to carry out economical and effective treatment before electrowinning. removal. At present, the methods for removing iron from the solution mainly include jarosite method, goethite method and hematite method. The goethite method is a commonly used iron removal method in the zinc smelting indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B1/248C22B19/20C22B19/30C22B58/00
CPCC22B7/02C22B1/248C22B19/30C22B19/20C22B58/00Y02P10/20
Inventor 高文成温建康邓静娴蔡镠璐
Owner 有研资源环境技术研究院(北京)有限公司
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