Waste stone powder recycling method for sandstone producing system by wet method

Abstract

A waste stone powder recycling method for a sandstone producing system by a wet method is disclosed. The method comprises the steps of: 1) directly discharging the wastewater for initially washing crude materials in the sandstone producing system by the wet method; 2) recycling the stone powder contained in the production wastewater in the last stage in the sandstone producing system by the wet method; 3) recycling unnecessary and abandoned stone powder after adding the stone powder for production of product sand in the sandstone producing system by the wet method; 4) dehydrating and drying the recycled stone powder in the steps 2) and 3) with the moisture content smaller than 2%; and 5) inspecting the stone powder prepared by the step 4) and packaging the qualified and clean stone powder with the content of mica which does not exceed standard into a stone powder tank for canning and storage, wherein a pneumatic arch breaking device is arranged below the stone powder tank. The waste stone powder recycling method for the sandstone producing system by the wet method is free from building a waste storage construction plant, energy-saving and environmental friendly and utilizes the resources effectively and fulfills the harmonious development of economy, society and environment.

Description

technical field [0001] The invention relates to a method for reusing waste stone powder, in particular to a method for reusing waste stone powder in a wet sand production system. Background technique [0002] At present, with the development of sand and gravel processing technology, the diversification of parent rock, such as sandstone, marble, basalt, and gneiss, has led to an increase in stone powder waste per unit of aggregate production. Waste stone powder accounts for a gradual increase in the total amount of finished sand, from 8% to 20% and then to 50% now (such as Santan marble). [0003] Due to the limitation of the construction site, it is necessary to develop and utilize the waste stone powder. With the westward movement of hydropower and the upward movement of the main stream, the terrain for dam building is steep and the construction site is narrow and steep. Such as Longtan, Xiangjiaba wet production tailings reservoir technology, or Xiluodu filter press tech...

AI Technical Summary

Problems solved by technology

In the existing sand and gravel production process, the excess stone powder needs to be discarded in a special place because the finished sand is not needed, and at the same time, it cannot pollute the air and water sources. The market price of stone powder recycling is 50-70 yuan / ton, which is much higher Due to the market price of finished sand (30-37 yuan / ton), the existing disposal methods waste a lot of resources

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