Device and method for evaluating explosion risk of sulphide ore dust

A technology for hazardous and sulfide minerals, applied in measurement devices, instruments, analysis of suspensions and porous materials, etc., can solve problems such as quantitative evaluation of potential hazards of dust explosions, and reduce errors, improve accuracy, and improve safety. sexual effect

Pending Publication Date: 2022-04-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the high-energy chemical ignition head itself has a certain risk of explosion and has been regulated by the national safety supervision department, the traditional detonation test will no longer meet the test conditions
In addition, the traditional explosion test’s identification parameters for dust explosion are based on the premise that the dust has exploded, and it is impossible to quantitatively evaluate the potential danger of dust explosion.
Traditional explosion experiments are dangerous

Method used

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  • Device and method for evaluating explosion risk of sulphide ore dust
  • Device and method for evaluating explosion risk of sulphide ore dust
  • Device and method for evaluating explosion risk of sulphide ore dust

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Such as Figure 1 to Figure 7 As shown, the device used in this embodiment for risk assessment of sulfide mine dust explosion includes a box body 1, and an ignition temperature test unit 2, an oxidation rate test unit 3, and a dust diffusion test unit are arranged in the box body 1 in sequence from left to right. Unit 4;

[0061] The ignition temperature testing unit 2 includes a heating table 2-1, and a table temperature probe 2-2, a sample temperature probe 2-3 and a first heating controller 2-4 arranged on the heating table 2-1;

[0062] The oxidation rate testing unit 3 includes a constant temperature oil bath 3-1 and an Erlenmeyer flask 3-2 placed in the constant temperature oil bath 3-1, and an oxygen concentration detection probe 3 is arranged in the Erlenmeyer flask 3-2 -3, and the mouth of the Erlenmeyer flask 3-2 is sealed and communicated with the expansion gas collection bag 3-4, and the constant temperature oil bath box 3-1 is provided with a heating mediu...

Embodiment 2

[0076] Such as Figure 8 As shown, this embodiment includes the following steps:

[0077] Step 1. Open three independent and transparent chamber doors 1-3 in the device for risk assessment of sulfide ore dust explosion, respectively, to the heating table 2-1 in the ignition temperature test unit 2 and the conical chamber in the oxidation rate test unit 3. Add the 1# sulfide ore dust sample of 30g, 36g, and 30g respectively in the dust dispersing device 4-4 in the bottle 3-2 and the dust diffusion test unit 4, and then close each box door 1-3;

[0078] Step 2. Control the first heating controller 2-4 through the operation panel 1-1 so that the heating table 2-1 containing the sulfide ore dust sample in step 1 is heated up, and the heating table 2-1 is measured by the table temperature probe 2-2 respectively. 1 temperature T 1 , using the sample temperature probe 2-3 to measure the temperature T of the sulfide ore dust sample 2 , the measurement results show that T 2 =450°C,...

Embodiment 3

[0085] The difference between this embodiment and embodiment 1 is: the 2# sulfide ore dust sample is used.

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Abstract

The invention discloses a device for evaluating the explosion risk of sulphide ore dust. The device comprises a box body, and an ignition temperature testing unit, an oxidation speed testing unit and a dust diffusion testing unit which are arranged in the box body, the invention also discloses a method for evaluating the explosion risk of the sulphide ore dust. The method comprises the following steps: 1, adding a sulphide ore dust sample; 2, testing the ignition temperature; 3, oxidation test; 4, testing dispersion performance; and 5, evaluating the explosion risk of the sulphide ore dust. According to the device disclosed by the invention, data of ignition temperature, oxidation performance and dispersion performance are detected and obtained by arranging each test unit, so that a sulphide ore dust explosion risk evaluation result is obtained, and the result accuracy is improved; according to the evaluation method, related indexes of the ignition stage, the explosion development stage and the explosion stage of sulphide ore dust explosion are evaluated respectively and then comprehensively evaluated, the evaluation method is comprehensive and close to the real situation, and the accuracy and reliability of the risk evaluation result of sulphide ore dust explosion are improved.

Description

technical field [0001] The invention belongs to the technical field of mine dust detection, and in particular relates to a device and method for evaluating the explosion risk of sulfide mine dust. Background technique [0002] There are a large number of sulfur-containing metal mines in my country and the mining volume is large, and explosion accidents of sulfide ore dust occur from time to time. During the blasting, mining, transportation and other operations of sulfur-bearing metal mines, a large amount of sulfide ore dust will be produced and dispersed into dust clouds due to rock crushing and ventilation dust. Once a certain concentration of dust cloud encounters a certain concentration of oxygen If there is an ignition source with sufficient energy, a dust explosion accident will occur. The particle size distribution of dust suspended in the air in the production site of sulfur-containing metal mines is finer, and it is easier to be ignited than under laboratory condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/22G01N33/00G01N15/06
Inventor 李孜军徐圆圆李蓉蓉徐宇韩梓晴袁天辉贾倩
Owner CENT SOUTH UNIV
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