Mine filling slurry preparation system suitable for various filling aggregates

Abstract

The invention relates to a mine filling slurry preparation system suitable for various filling aggregates, which comprises a primary slurry preparation device, a final slurry preparation device and a two-position three-way redirection valve I. The primary slurry preparation device is used for stirring fine-grained materials forming the filling slurry materials at a high speed, and the final slurry preparation device is used for stirring the fine-grained materials forming the filling slurry materials at a high speed. A slurry outlet of the primary slurry preparation device is connected with a main connector of the two-position three-way redirection valve I through a pipeline, one branch connector of the two-position three-way redirection valve I is connected with a feeding port of the final slurry preparation device through a first pipeline, the other branch connector of the two-position three-way redirection valve I is connected with the first filling branch pipe, and a discharging port of the final slurry preparation device is connected with the second filling branch pipe. The preparation method has the advantages that the special performance of the equipment can be better exerted by respectively selecting the equipment with different characteristics according to different size fraction properties of materials forming the filling slurry, so that the prepared filling slurry has better homogeneity, and an optimal process condition is provided for formation of subsequent filling body strength.

Description

technical field [0001] The invention relates to the technical field of non-coal mine filling, in particular to a mine filling slurry preparation system suitable for various filling aggregates. Background technique [0002] In the field of mine filling engineering, beneficiation tailings and crushed stone are the main aggregates for preparing filling slurry, and the preparation of filling slurry is an important process link to ensure the strength of the subsequent filling body. In the prior art, two-stage horizontal twin-shaft mixers are generally used to prepare the filling aggregates, or one-stage vertical high-concentration mixers are used to prepare the filling aggregates, or one-stage intermittent horizontal mixers are used to follow the mixing method of building concrete. A twin-shaft mixer is used to stir and prepare the filling aggregate: some use a vertical high-concentration mixing tank for preliminary mixing and stirring, and then use a "high-efficiency activation ...

AI Technical Summary

Problems solved by technology

None of the above stirring preparation techniques (a brief introduction to several stirring methods commonly used at present) can be well applied to the preparation of filling slurry composed of various filling aggregates:

[0003] 1) Using a two-stage horizontal twin-shaft mixer to prepare the filling aggregate, its disadvantages are: due to the low speed of the horizontal twin-shaft mixer, it is difficult to fully break up and disperse the fine powdery gelling material, and then to Tailings and sand aggregates are selected to achieve effective wrapping, and some cementitious materials will still exist in the filling slurry in the form of aggregates, which will not only cause the cementitious materials to fail to play a role in cementation and be wasted, but also cannot ensure the coagulation of the filling slurry The formation of the final filling body strength;

[0004] 2) A section of vertical high-concentration mixer is used to stir and prepare the filling aggregate, which has the following disadvantages: due to the high speed of the vertical high-concentration mixer, the sand and gravel aggregate added to it will grind the mixing blades and the inner wall of the body, Seriously affect the life of the equipment and the stability of the system;

[0005] 3) Disadvantages of using the mixing method of building concrete (that is, the disadvantages of mixing by a batch-type horizontal twin-shaft mixer): using a batch-type horizontal twin-shaft mixer to prepare the filling aggregate, not only has the stirring speed Low and short stirring time, it is difficult to fully disperse and disperse the cementitious material, and because the stirring is discontinuous, the working time of stirring is long, and it is difficult to adapt to the mine filling project up to 80m 3 Large amount of slurry preparation above / h

[0006] 4) The disadvantages of using a vertical high-concentration mixer for initial mixing and stirring, and then using a "high-efficiency activation mixer" to implement activation and stirring (that is, the disadvantages of using a vertical high-concentration mixer and a second-stage high-efficiency activation mixer to implement stirring) : Although the cementitious material can be activated to the best state, because this configuration is only suitable for fine-grained aggregates, and for the high-efficiency activation mixer reaching above 1000rpm, the high-speed tailing flow will have a strong impact on the impeller and the inner wall of the mixer body. The grinding and abrasion greatly reduces its normal working cycle and seriously affects the stability and reliability of the system

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