A method for microwave-assisted extraction of metal minerals

A metal mineral and microwave-assisted technology, which is applied in the direction of improving process efficiency and reducing gas emissions, can solve the problems of long reduction and leaching time, cumbersome operation process, and high input cost, and achieve short reduction and leaching time and convenient operation , The effect of low input cost

Inactive Publication Date: 2018-09-07
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for microwave-assisted extraction of metal minerals in view of the deficiencies in the above-mentioned prior art. Quickly complete the extraction of metal minerals, with high efficiency, short reduction and leaching time, high metal reduction and leaching rates, energy saving and environmental protection, good use effect, and can effectively solve the problems of large input costs, cumbersome operation process, and energy consumption in traditional extraction methods. Large energy, long reduction and leaching time, environmental pollution and other problems

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  • A method for microwave-assisted extraction of metal minerals
  • A method for microwave-assisted extraction of metal minerals
  • A method for microwave-assisted extraction of metal minerals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 , figure 2 with image 3 As shown, this embodiment includes the following steps:

[0045] Step 1. Microwave-assisted treatment: put the magnetite on the belt transmission mechanism 8-1, the controller 1 drives the belt transmission mechanism 8-1 to rotate through the belt transmission drive unit 8, and transports the magnetite to the microwave processing device for further processing. Microwave assisted processing. Using microwaves to radiate magnetite, the temperature rise rate of useful minerals in magnetite is greater than that of gangue minerals in magnetite, including quartz and calcite, so useful minerals in magnetite absorb microwave energy and heat at a higher temperature, while magnetite Gangue minerals in iron ore absorb less microwave energy and lower temperature, so that a local temperature difference is formed between useful minerals and gangue minerals, resulting in cracks between useful minerals and gangue minerals, increasing the mon...

Embodiment 2

[0063] In this example, the difference from Example 1 is that the heating time of the microwave-assisted treatment in step 1 is 18 minutes, and the microwave power is 8 kW. In step 5, the magnetite powder to be processed is 2.8 kg, the temperature for microwave heating and reduction is 1100° C., and the time for microwave heating and reduction is 55 minutes. In this embodiment, the remaining steps and process parameters are the same as in Embodiment 1.

[0064] The properties of extracting metallic iron from the magnetite in this example by the traditional method and the present method are shown in Table 2.

[0065] Table 2

[0066]

[0067] As can be seen from Table 2, utilizing the traditional method, the reduction time is 85min, and the reduction rate is 88.7%, and the reduction time utilizing the embodiment of the present invention 2 to extract metallic iron from the magnetite powder is 55min (30min less than the traditional method time) , and the reduction rate of meta...

Embodiment 3

[0069] In this example, the difference from Example 1 is that the heating time of the microwave-assisted treatment in step 1 is 25 minutes, and the microwave power is 10 kW. In step 5, the magnetite powder to be processed is 3.2 kg, the temperature for microwave heating and reduction is 1180° C., and the time for microwave heating and reduction is 60 minutes. In this embodiment, the remaining steps and process parameters are the same as in Embodiment 1.

[0070] The performances of extracting metallic iron from the magnetite of this example by the traditional method and the present method are shown in Table 3.

[0071] table 3

[0072]

[0073]

[0074] As can be seen from Table 3, utilizing the traditional method, the reduction time is 95min, and the reduction rate is 88.6%, and the reduction time utilizing the embodiment of the present invention 3 to extract metallic iron from the magnetite powder is 60min (35min less than the traditional method time) , and the reduc...

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Abstract

The invention discloses a method for microwave-assisted extraction of metal minerals. The method includes the first step of microwave-assisted treatment, the second step of cooling, the third step of ore grinding, the fourth step of separation and the fifth step of metal mineral extraction. The method is simple in step, low in input cost and convenient to achieve, the ore grinding workload is reduced, metal mineral extraction can be simply, conveniently and rapidly completed, efficiency is high, the needed reduction and leaching time is short, the reduction rate and the leaching rate of metal are high, energy conservation and environment friendliness are achieved, the using effect is good, and the problems that in a traditional extraction method, the input cost is large, the operation process is complex, energy consumption is large, the reduction and leaching time are long, and the environment is polluted can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of metal mineral extraction, and in particular relates to a method for microwave-assisted extraction of metal minerals. Background technique [0002] At present, metal extraction methods include grinding, sorting and extraction. Grinding is to crush and grind metal minerals according to the characteristics of different substances of metal minerals, and grind them to metal powder; sorting is to use physical or chemical methods to separate metal minerals The process of separating useful minerals from gangue minerals, or separating a variety of useful minerals; extraction is to extract metals from the sorted useful minerals by carbon reduction or leaching, but there are still some problems in this traditional metal extraction method. Disadvantages: First of all, during the crushing and grinding process of metal minerals, on the one hand, it is necessary to crush the large metal minerals, which increases the lab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/00C22B3/04C22B15/00C21B15/00C22B5/10
CPCC21B15/00C22B1/00C22B3/04C22B5/10C22B15/0002C22B15/0065Y02P10/134Y02P10/20
Inventor 代俊李传净杨强
Owner XIAN UNIV OF SCI & TECH
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