Mortar making system and process suitable for large horizontal sand silo of mine filling station

Abstract

The invention discloses a mortar making system and process suitable for a large horizontal sand silo of a mine filling station. The system comprises a mortar supply and transport system, a high-pressure gas supply pipe (9), a high-pressure water supply pipe (8), a horizontal sand silo (7), an output pipeline of the horizontal sand silo, a cement silo (15), an output system of the cement silo, a stirring device (14) and a filling pipeline, wherein the outlet of the mortar supply and transport system is arranged above the horizontal sand silo (7); the output pipeline of the horizontal sand silo (7), the output system of the cement silo (15) and the stirring device (14) converge; the filling pipeline is connected with a goaf (18); the horizontal sand silo (7) begins from a sand discharge opening; a mortar making area, a transport area and a sand storage area are divided along the trend of the horizontal sand silo (7); annular high-pressure water supply branch pipes and high-pressure gas supply branch pipes are paved in the mortar making area; high-pressure water supply branch pipes and high-pressure gas supply branch pipes are paved in the transport area in parallel; the high-pressure gas supply pipe (9) is connected with the high-pressure gas supply branch pipes in the horizontal sand silo (7); and the high-pressure water supply pipe (8) is connected with the annular high-pressure water supply branch pipes and the high-pressure water supply branch pipes in the horizontal sand silo (7). The system and the process have the following effects: the horizontal sand silo achieves high-capacity continuous filling; the filler quality is ensured; the unsupported roof time of the goaf is reduced; the filling station construction investment is reduced; mining and filling of the mine are balanced; and the system and the process are favorable for the mine to achieve safety production and environmental protection.

Description

technical field [0001] The invention relates to a slurry-making system and a slurry-making process of an underground mine filling station, in particular to a slurry-making system and a process suitable for filling a large horizontal sand bin. It is suitable for all kinds of mines to use the horizontal sand bin for joint filling with the mortar from the concentrator or the dry tailings from the tailings pond. Background technique [0002] Although the adoption of filling technology in my country's underground mines started relatively late, with the country's emphasis on and investment in mine safety, recovery rate, environmental protection, etc., as well as changes in mine safety management and production concepts, filling technology has become more and more widely used. application. [0003] The high-concentration full tailings filling technology has the characteristics of low filling body bleeding and high roof connection rate, and has been widely valued by mines and design...

AI Technical Summary

Problems solved by technology

However, the vertical sand silo usually uses the mortar from the mineral processing plant as the pulping material, and because the mortar concentration of the mineral processing plant is too low, the mortar transported to the sand silo can only meet the filling requirements of high-concentration mortar after many times of overflow and sedimentation. The slurry takes a long time to achieve continuous filling, which not only affects the output of the mine, but also unbalances the mining and filling of the mine and increases the unsafe factors of the mine; some mines also increase the concentration of the mortar to 40% by building a large thickener After left or right, it is transported to the sand bin for pulping, which not only increases the investment and operating costs, but also the concentration of the mortar concentrated by the thickener cannot reach the high concentration required for the underground filling body, and it also needs to go through several overflow sedimentation The concentration required for pulping can be reached after a long time, and the pulping time is also longer

At the same time, the height of the vertical sand bin from the ground is relatively high, the construction process is relatively complicated, and the cost of filling station construction and filling costs are also high, which is difficult for medium and small mines to bear in terms of funds

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