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Method for extracting valuable metal from low-content nonferrous metal

A non-ferrous metal, low-content technology, applied in the extraction of non-ferrous metals, in the field of non-ferrous metal extraction, can solve the problem of unsatisfactory economical, ecological, high-efficiency and comprehensive, refractory mineral resources and secondary resources, rich sources of resources Diverse and uncertain issues, to achieve the effect of reducing the cost of tail gas treatment, high utilization rate of heat energy, and reducing the load of tail gas treatment

Inactive Publication Date: 2014-04-16
ANHUI HUAIHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Low-grade refractory mineral resources and secondary resources have the characteristics of low content of valuable metals, rich and diverse sources of resources and uncertainties, complex components and large content fluctuations, etc., resulting in the existing classical metallurgical methods unable to meet the requirements for processing such materials Basic requirements in terms of economy, ecology, efficiency and comprehensiveness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for extracting nonferrous metals from low-content nonferrous metals, comprising the steps of:

[0022] (1) Pretreatment: Process low-grade copper ore into powder with a water content not higher than 10% and a particle size of -60 mesh;

[0023] (2) Preheating: preheat reducing agent bituminous coal powder, chlorinating agent sodium chloride, and low-content nonferrous metal materials to 500-800°C;

[0024] (3) High-temperature chlorination roasting: add 0-6wt% reducing agent and 4-10wt% chlorinating agent to the preheated low-content non-ferrous metal material to carry out chlorination roasting of valuable metals; the roasting temperature is 800-1100°C, Roasting time 50min;

[0025] (4) Collection and recovery of valuable metal chlorides: After the high-temperature flue gas from chlorination and roasting is dust-collected to remove mineral dust, it is cooled and wet-type collected to recover valuable metal chlorides; Valuable metal content.

[0026] The low-...

Embodiment 2

[0028] A method for extracting nonferrous metals from low-content nonferrous metals, comprising the steps of:

[0029] (1) Pretreatment: Process the lean tin ore into a powder with a water content not higher than 10% and a particle size of -60 mesh;

[0030] (2) Preheating: preheat reducing agent bituminous coal powder, chlorinating agent sodium chloride, and low-content nonferrous metal materials to 500-800°C;

[0031] (3) High-temperature chlorination roasting: add 0-6wt% reducing agent and 4-10wt% chlorinating agent to the preheated low-content non-ferrous metal material to carry out chlorination roasting of valuable metals; the roasting temperature is 800-1100°C, Roasting time 40min;

[0032] (4) Collection and recovery of valuable metal chlorides: After the high-temperature flue gas from chlorination and roasting is dust-collected to remove mineral dust, it is cooled and wet-type collected to recover valuable metal chlorides; Valuable metal content.

[0033] The low-co...

Embodiment 3

[0035] A method for extracting nonferrous metals from low-content nonferrous metals, comprising the steps of:

[0036] (1) Pretreatment: Process low-grade chromite ore into a powder with a water content not higher than 10% and a particle size of -60 mesh;

[0037] (2) Preheating: preheat reducing agent bituminous coal powder, chlorinating agent sodium chloride, and low-content nonferrous metal materials to 500-800°C;

[0038] (3) High-temperature chlorination roasting: add 0-6wt% reducing agent and 4-10wt% chlorinating agent to the preheated low-content non-ferrous metal material to carry out chlorination roasting of valuable metals; the roasting temperature is 800-1100°C, Roasting time 30min;

[0039] (4) Collection and recovery of valuable metal chlorides: After the high-temperature flue gas from chlorination and roasting is dust-collected to remove mineral dust, it is cooled and wet-type collected to recover valuable metal chlorides; Valuable metal content.

[0040] The ...

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Abstract

The invention discloses a method for extracting valuable metal from low-content nonferrous metal. The method comprises the following steps: (1) pretreatment, (2) preheating, (3), high-temperature chloridizing roasting, and (4), trapping and recovery of valuable metal chloride. According to the chloridizing metallurgy method for which metal chloride is used for metal extraction, great advantages are provided when low-grade metal materials which are difficult to process are processed, and valuable metal can be extracted economically and efficiently, and the method is a universal technical scheme aiming at complex low-content nonferrous metal materials with various processing types, large resource quantities and complex ore types.

Description

technical field [0001] The invention belongs to the field of nonferrous metallurgy and relates to a method for extracting nonferrous metals, in particular to a method for extracting nonferrous metals from low-content nonferrous metals. Background technique [0002] Non-ferrous metals, non-ferrous metals in a narrow sense, also known as non-ferrous metals, are the general term for all metals other than iron, manganese, and chromium. Non-ferrous metals in a broad sense also include non-ferrous alloys. Non-ferrous alloy is an alloy composed of a non-ferrous metal as the base (usually more than 50%) and adding one or several other elements. [0003] Non-ferrous metals are essential basic materials and important strategic materials for national economy, people's daily life, national defense industry, scientific and technological development. Agricultural modernization, industrial modernization, national defense and scientific and technological modernization are inseparable from...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B1/08C22B7/02
CPCY02P10/20
Inventor 段巍
Owner ANHUI HUAIHUA
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