Negative pressure balance draw shaft dust removal method

Abstract

The invention discloses a negative pressure balance draw shaft dust removal method. The negative pressure balance draw shaft dust removal method comprises the steps that a draw shaft is in communication with ore discharge ports in all middle sections through dust collection drill holes, dust collection covers are arranged above the ore discharge ports in all the middle sections, the dust collection covers are connected with the dust collection drill holes through dust collection pipes, and air return valves are arranged between the dust collection drill holes and the dust collection pipes. Dust-containing air flow is collected into the dust collection covers above the ore discharge openings through negative pressure generated in the ore falling process in the draw shaft and enters the draw shaft again through the dust suction pipes, the reverse air valves and the dust collection drill holes, and therefore the effect of rapid dust removal at the ore discharge openings is achieved. The negative pressure balance draw shaft dust removal method has the advantages of simple principle and process, strong dust suppression capability, low investment and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of industrial dust removal, and in particular relates to a method for removing dust in a negative pressure balance well slide. Background technique [0002] In mine mining, the chute is an important part of the ore lifting and transportation process. The general mine ore transportation system is transported from the stope to the stope chute, and then transported to the branch chute by mine cars or trackless transportation equipment, and then through the transfer Enter the main chute system. Due to the ore-drawing height difference of hundreds of meters or even hundreds of meters when the chute unloads ore, the loose ore is restricted by the shaft wall and produces a piston-like movement during the falling process, which makes the air in the chute compressed sharply and passes through various In the branch shaft in the middle section, a large amount of impact airflow is ejected. The airflow carries a large ...

AI Technical Summary

Problems solved by technology

Adding a wet or dry dust removal system requires additional equipment, increased operating costs, and increased corresponding losses. However, the use of full-wet operation, first, the humidification process cannot be controlled, and second, it will cause inevitable ore transportation and mining. Dilution loss

[0003] Patent No. CN 202441409 U discloses a chute dust control mechanism. By setting a connecting lane between the ore chute and the waste rock chute, the two chutes serve as pressure relief wells for each other. Although this scheme reduces dust spillage to a certain extent, However, the scope of application is small. When the distance between the ore chute and the waste rock chute is far away, it will lead to a long connection project and a large investment

Patent No. CN 209369860 U discloses a chute blowing-suction dust removal device, which forms an airtight dust removal space by setting an air curtain and a fan at the ore unloading port, and reduces dust overflow under the condition of ensuring that the unloading is not affected. The solution is to use air curtains to block and suppress dust, but fans need to be added, and the impact of dust airflow is relatively large, so the effect of preventing dust suppression is not ideal

Patent No. CN109779675 B discloses a compound dust removal and purification system for underground mine chute ore dust control. The dust removal fan is implemented by infrared induction and spray, and a two-stage dust removal and purification system of spray dust removal and wet dust removal fan purification is constructed. The dust-proof sealing curtain is used to seal and block the overflowing dust to achieve the effect of reducing dust, but this place belongs to a high-dust space, the reliability of the infrared sensor cannot be guaranteed, and the system is complicated, which affects the subsequent unloading process, and the field applicability is poor.

Patent No. CN205858401 U is a deep chute wet and dry two-stage atomization dedusting purification system, which is to set a buffer patio, and set up a connecting lane between the chute and the buffer patio, and arrange wet and dry two stages in it Two sets of dust removal systems are used for atomization dust removal and purification to achieve the purpose of dust control and dust suppression, but the investment in engineering and equipment is large, energy consumption is high, and the value of popularization and application is low

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