Continuous preparation system and preparation process of full-size tailings cemented filling slurry

Abstract

The invention relates to a continuous preparation system and a preparation technology of whole grain grade tailing cemented filling slurry. The continuous preparation system mainly comprises a tailing slurry collecting buffer feeding device, a deep-cone thickener, a flocculating agent preparing and adding device, an underflow slag slurry pump, a cementing material storage bin, a cementing material measuring and conveying device, an air compression system, a water supply system, a filling accident pool, a stirring system and a filling slurry output pipeline. The preparation technology comprises the steps of conveying tailing slurry to the tailing slurry collecting buffer feeding device through the slag slurry pump, after reducing the pressure to 0.03 MPa through the collecting buffer feeding device and carrying out energy dissipation, feeding the tailing slurry into the deep-cone thickener, and adding a flocculating agent into the deep-cone thickener according to the principle that for per ton of tailing slurry, every 5 to 20 g of the flocculating agent is added, so as to obtain high-concentration tailing slurry with the concentration of 65 to 75%; and conveying the high-concentration tailing slurry and a cementing material into the stirring system according to the fact that the mass ratio of the high-concentration tailing slurry to the cementing material is 1 to (5 to 40), adding water, stirring, and preparing the mixture into the high-concentration whole grain grade tailing cemented filling slurry with the concentration of 65 to 75%. According to the continuous preparation system and the preparation technology, the system is simple, the automation degree during the preparation process is high, the operation is convenient, and the filling slurry can be continuously prepared.

Description

technical field [0001] The invention belongs to the field of mine mining and filling systems, in particular to a continuous preparation system and a preparation process for full-grain tailings cemented filling slurry suitable for large-scale mining of mines. Background technique [0002] At present, the use of full-size tailings as filling aggregate has become a development trend, and the preparation of full-size tailings cemented filling slurry is particularly critical. For the filling system of large-scale filling mining mines, the current technical experience at home and abroad is still shallow, and the design and construction of small-scale filling mining mines are mostly referred to, and the following problems exist: [0003] Traditional mine filling slurry preparation systems mostly use vertical sand bins as facilities for storing and thickening tailing mortar. After the tailing mortar produced by the concentrator is thickened by the thickener, it is pumped to the ver...

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Problems solved by technology

[0005] Thirdly, during the operation of the existing filling slurry preparation system, the cement material in the cement silo is prone to deliquescence and hardening, resulting in material blocking, hanging material or poor discharge; Dust and spillage will affect the working environment; the stirring of the filling slurry is also uneven, the effect is not good, and the fluidity is not good.

At the same time, during the operation of the filling slurry preparation system, it is inevitable that there will be some unexpected situations

For example, when the system needs to be stopped due to power outages, equipment failures, etc., some preparation equipment and filling slurry delivery pipelines must be flushed to prevent pipe blockage and wall hanging; sometimes it is even necessary to empty the tailing mortar concentration and storage facilities The tailings that are discharged need to be discharged separately; when the power is cut off, the water supply system using pumping will be completely useless

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