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A method for evaluating the explosion pressure of sulfide mine dust

A technology of explosion pressure and sulfide ore, applied in the direction of material explosiveness, etc., can solve the problems of difficulty in evaluating the explosion risk of sulfide ore dust, the composition of sulfide ore dust is complex and changeable, and cannot be applied to the production site, etc., and achieves reliable and stable evaluation results. Evaluate safety and the effect of simple evaluation methods

Active Publication Date: 2022-07-15
CENT SOUTH UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the many factors affecting the occurrence of dust explosions and the complex and changeable composition of sulfide ore dust, it is very difficult to evaluate the explosion hazard of sulfide ore dust.
[0003] In the prior art, the detonation test reflects and evaluates the explosion hazard of sulfide ore dust, which itself has certain risks, and the experimental process is cumbersome and the conditions are harsh, so it cannot be applied to the production site
In addition, from the analysis of safety principles, this method can only obtain the result of whether the dust can explode, but cannot evaluate the possibility of explosion

Method used

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  • A method for evaluating the explosion pressure of sulfide mine dust
  • A method for evaluating the explosion pressure of sulfide mine dust
  • A method for evaluating the explosion pressure of sulfide mine dust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like figure 1 As shown, the evaluation method of this embodiment includes the following steps:

[0034] Step 1: Prepare a series of sulfide ore dusts with different concentrations and different content of ion components involved in the explosion, numbered in sequence 1, 2, ..., 60, and then use a 20L spherical explosion experimental device to measure the explosion pressure of each sulfide ore dust, and Using formula (1), the reduction component index Ω of each sulfide dust 还 Calculate separately:

[0035]

[0036] According to the concentration of a series of sulfide dust, the calculated reduction component index Ω 还 and the measured explosion pressure data, as shown in Table 1, draw the contour map of the explosion pressure of sulfide ore dust at different sulfide ore dust concentrations and reducing component indices, and obtain the sulfide ore dust explosion pressure judgment diagram, such as figure 2 shown;

[0037] Table 1

[0038]

[0039]

[0040] ...

Embodiment 2

[0045] The difference between this example and Example 1 is: the concentration of the sulfide dust sample and the anion S involved in the explosion 2 2- and S 2- The mass percentage of the corresponding group.

Embodiment 3

[0047] The difference between this example and Example 1 is: the concentration of the sulfide dust sample and the anion S involved in the explosion 2 2- and S 2- The mass percentage of the corresponding group.

[0048] In Examples 1 to 3 of the present invention, the concentration of sulfide ore dust at the production site collected from the sulfide ore dust samples, and the anion S in the sulfide ore dust samples 2 2- and S 2- The mass percentages of the corresponding groups are shown in Table 2.

[0049] Table 2

[0050]

[0051] Reduction component index Ω of sulfide mineral dust samples in Examples 1 to 3 of the present invention 还 The numerical results, predicted explosion pressure and measured explosion pressure results, and explosion evaluation results are shown in Table 3.

[0052] table 3

[0053]

[0054] As can be seen from Table 3, the specific content of the ionic components involved in the explosion in the sulfide mineral dust samples of Examples 1 ...

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Abstract

The invention discloses a method for evaluating the explosion pressure of sulfide ore dust. The method includes: 1. preparing sulfide ore dust, measuring the explosion pressure and calculating the reduction component index, and drawing the determination of the explosion pressure of the sulfide ore dust in combination with the concentration of the sulfide ore dust Fig. 2. Collecting sulfide dust samples to determine the concentration; 3. Detecting the elemental composition of the sulfide ore dust samples, calculating the anion components involved in the explosion, and then calculating the reduction component index; 4. According to the sulfide ore dust concentration results and reducing component index, The explosion pressure of sulfide ore dust is predicted and evaluated with reference to the sulfide ore dust explosion pressure judgment chart. The invention studies the relationship between the explosion pressure of the sulfide ore dust and the concentration of the sulfide ore dust and the reduction component index, and draws a judgment map of the explosion pressure of the sulfide ore dust. , the process conditions are mild, simple and easy to operate, no detonation process is required, and it is suitable for production sites.

Description

technical field [0001] The invention belongs to the technical field of dust explosion risk evaluation and prevention, and particularly relates to a method for evaluating the explosion pressure of sulfide mineral dust. Background technique [0002] There are many non-ferrous metal mines in my country, including a huge number of sulfur-containing metal mines. A large amount of sulfide ore dust will be generated in the production process of sulfur-containing metal mines, some of which are explosive, and there are oxygen conditions in the mines, and some of the mines have relatively closed spaces, so once the conditions of the ignition source are available, sulfide ore may occur. Dust explosion accidents, resulting in economic losses and casualties. Therefore, it is necessary to evaluate the explosion hazard of underground sulfide mineral dust to take targeted preventive measures. However, it is very difficult to evaluate the explosion hazard of sulfide ore dust due to the man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/54
CPCG01N25/54
Inventor 李孜军徐圆圆徐宇李蓉蓉韩梓晴章梦胜王君健
Owner CENT SOUTH UNIV