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Method for directly leaching low-grade germanic lead oxide and zinc oxide ores

A low-grade lead-zinc oxide technology, applied in the direction of improving process efficiency, can solve the problems of high energy consumption, large pollution and low recovery rate

Inactive Publication Date: 2011-01-12
毕节学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pyrotechnic part has the disadvantages of low recovery rate, large pollution and high energy consumption.

Method used

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  • Method for directly leaching low-grade germanic lead oxide and zinc oxide ores
  • Method for directly leaching low-grade germanic lead oxide and zinc oxide ores
  • Method for directly leaching low-grade germanic lead oxide and zinc oxide ores

Examples

Experimental program
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Effect test

Embodiment 1

[0124] Embodiment 1 of the present invention: the process of directly leaching low-grade germanium-containing lead-zinc oxide ore. First, the ore sand with a zinc ion content of 8% and a germanium content of 80 g / T is added to the leaching tank, and the liquid-solid ratio is 5:1. The first leaching is performed by adding dilute sulfuric acid with a concentration of 90g / L. The leaching agent dilute sulfuric acid is added from the top of the leaching tank, and the solution is filtered out from the bottom of the leaching tank. The flow of the filtrate is controlled by the flow regulating valve, and the filtrate is returned to the leaching tank. And after 40 days of leaching at natural ambient temperature (according to the specific climate and location to determine the ambient temperature), filter out the leach residue to obtain leachate A; add raw ore containing zinc ions to the leachate A again, and add sulfuric acid to carry out the second The first leaching, after leaching at n...

Embodiment 2

[0126] Example 2: The process of directly leaching low-grade germanium-containing lead-zinc oxide ore. First, the ore sand with a zinc ion content of 5% and a germanium content of 40 g / T is added to the leaching tank, and the concentration is added according to a liquid-solid ratio of 4:1. For the first leaching of 75g / L dilute sulfuric acid, the leaching agent dilute sulfuric acid is added from the top of the leaching tank, the solution is filtered out from the bottom of the leaching tank, the flow of the filtrate is controlled by the flow regulating valve, and the filtrate is returned to the leaching tank, and in the natural After leaching at ambient temperature (according to the specific climate and location to determine the ambient temperature) for 60 days, filter out the leach residue to obtain leachate A; add raw ore containing zinc ions to the leachate A again, and supplement sulfuric acid for the second leaching. After leaching at natural ambient temperature for 60 days...

Embodiment 3

[0127] Example 3: The process of directly leaching low-grade germanium-containing lead-zinc oxide ore. First, the ore sand with a zinc ion content of 10% and a germanium content of 120g / T is added to the leaching tank, and the concentration is added according to a liquid-solid ratio of 3:1. 80g / L dilute sulfuric acid is used for the first leaching, the leaching agent dilute sulfuric acid is added from the top of the leaching tank, the solution is filtered out from the bottom of the leaching tank, the flow of the filtrate is controlled by the flow regulating valve, and the filtrate is returned to the leaching tank, and in the natural environment After leaching at high temperature for 30 days, filter out the leaching residue to obtain leach solution B; add raw ore containing zinc ions again, and supplement sulfuric acid for the third leaching, and then filter out the leaching residue after leaching at natural ambient temperature for 30 days. Obtain leach solution C, promptly obta...

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Abstract

The invention discloses a method for directly leaching low-grade germanic lead oxide and zinc oxide ores. The method comprises the following steps of: adding mineral sands into a leaching pool, adding diluted sulfuric acid into the leaching pool according to a liquid-solid ratio of 2:2-5:1 to perform leaching for the first time, and obtaining a leachate A after 30 to 90 days of the leaching which is performed at the natural environment temperature; removing leaching residues in the leaching pool, re-adding new mineral sands into the leaching pool, adding the leachate A into the leaching pool for leaching, adjusting the sulfuric acid concentration to be between 40 and 100 g / L, performing leaching on the second batch of the mineral sands, and obtaining a leachate B after 30 to 90 days of the leaching which is performed at the natural environment temperature; and repeating the second step until the zinc ion concentration in the obtained leachate accords with an extraction process requirement. The method adopts a heap leaching method to process the low-grade lead oxide and zinc oxide ores, uses a recycle leaching mode to leach metal zinc in the low-grade lead oxide and zinc oxide ores and has simple technical processes and low production cost; the obtained leachate can be processed conveniently; and other valuable metals such as germanium and the like in raw materials can be comprehensively recovered.

Description

technical field [0001] The invention relates to a metal extraction method, in particular to a method for directly leaching low-grade germanium-containing lead-zinc oxide ore. Background technique [0002] Zinc and its compounds have a wide range of uses, and zinc has a good market demand. Zinc metallurgy is developing rapidly in my country. However, due to the limited resources of zinc metallurgy, the supply of zinc metallurgical raw materials is tight. In order to maintain the sustainable and healthy development of zinc metallurgy, various zinc raw materials must be developed and utilized. For a long time, zinc sulfide ore has been the main raw material for extracting zinc metal. With the consumption of easy-to-select zinc sulfide ore and zinc oxide ore that can be directly smelted, the utilization of medium and low-grade lead-zinc oxide ore has attracted increasing attention. Low-grade lead-zinc ore resources are important raw materials for zinc smelting. Through the com...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B19/00
CPCY02P10/20
Inventor 梁杰胡琼周军杨玉琼鱼鹏涛李瑞
Owner 毕节学院
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