A dry desliming method for rock stripping tailings

Abstract

The invention relates to the field of solid waste resource utilization and discloses a stripping rock tailing dry-method desliming method. The technical problems that in the prior art, during stripping rock tailing desliming, water consumption is high, the cost is high and time is wasted are solved. The method comprises the steps that the total mass of slime in an excavation tailing area is estimated; a desliming agent is added into the excavation tailing area; the excavated tailing and the desliming agent are mixed and piled; a preset amount of water is sprayed to the piled mixture so as to wet the mixture, and the preset amount is 10-15% the total mass of the slime of the excavation tailing area; the mixture with the sprayed water is placed for 2-6 h so that the desliming agent can react with soil particles in tailings; the placed mixture is contained in a breaker for breaking; the broken mixture is sieved, wherein the part, with the diameter not larger than the preset diameter is adopted as tailing slime to be collected in the sieving process. The technical effect that the water consumption, the cost and the consumed time of stripping rock tailing desliming are lowered can be achieved.

Description

technical field [0001] The invention relates to the field of resource utilization of solid waste, in particular to a dry desliming method for rock stripping tailings. Background technique [0002] Concrete construction projects need to use a large amount of crushed stone as coarse aggregate, and there are strict requirements on the mud content of the crushed stone. Clay content has a great influence on the strength of concrete structure and engineering quality. The mud content of crushed stone used in concrete engineering must meet the requirements of GB / T14685-2011, JGJ52-2006 and other relevant standards. For gravel resources that do not meet the mud content standards, they need to be washed with water and dried before use. Therefore, the price of clean gravel on the market is much higher than that of gravel with mud attached. [0003] Rock stripping tailings are a kind of solid waste produced in the process of open pit mining. Before mining ore in an open-pit mine, th...

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Problems solved by technology

[0005] The first one is to use a large amount of water to wash the gravel to reduce its mud content, but the washing process will generate a large amount of waste water, which has the problem of external discharge. At the same time, in the mining area that lacks water sources, water washing is also difficult.

[0006] The second method is based on the principles of flocculation and flotation to reduce the mud content of crushed stones, but these methods are suitable for processing resources such as metal minerals with high added value (several hundred yuan per ton), while mining crushed stones from rock stripping tailings The added value of stone itself is low (tens of yuan per ton), and the cost / benefit ratio of these methods is not good

However, this solution also has problems such as long process time and difficulty in increasing output.

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