Manufactured-sand water-washing device and technique

Abstract

A manufactured-sand water-washing device comprises a sand washing machine and a fine-sand collecting machine; the sand washing machine comprises a transmission device, a shell and a main shaft system which is fixed in the shell; the front end of the shell is provided with a discharge opening, the rear end of the shell is provided with a sand washing tank; the upper part of the sand washing tank is provided with a mud discharge opening; the mud discharge opening of the sand washing machine is connected with an inlet of the fine sand collecting machine; and the fine-sand collecting machine comprises a sand draining pump, a sand pulp concentrator, a high-efficiency dewatering screen, a material storing box and a material returning box. The invention also discloses a manufactured-sand water-washing technique. The device and the technique have the following beneficial effects that with the adoption of the combination of the sand washing machine and the fine-sand collecting machine, mud water discharged from the sand washing machine is subjected to a secondary treatment by the fine-sand collecting machine, and fine sand subjected to the secondary treatment is doped in the water-washed sand which is directly obtained by the sand washing machine, so that not only is the yield of the finished product sand increased, but also the quality of the finished product sand is optimized; and the fine sand in the mud water is re-collected, and thus, the discharge amount is reduced by 15% and the cleaning cycle of a settling pond is prolonged.

Description

technical field [0001] The invention relates to a sand washing device and process for producing construction sand, in particular to a machine-made sand washing device and process capable of increasing the output of finished sand and optimizing the gradation of finished sand. Background technique [0002] Washed sand is a necessary material in cement mortar. If there is no sand in the cement mortar, the setting strength of the cement mortar will be almost zero. Washed sand is a product in which the sand in the river course or the old river bed is washed by the sand washing machine production line, and then hydraulically classified and deslimed to achieve a reasonable particle size ratio and reduce the mud content to less than 0.7%. The traditional production process is to use a sand washing machine to clean the pulled sand, and discharge the cleaned slurry water to the multi-stage sedimentation tank through pipelines. The fine sand and mud are deposited at the bottom of the ...

AI Technical Summary

Problems solved by technology

However, this solution often causes the gap between the screw blade on the main shaft and the shell to be too large, resulting in a large amount of sand returning, reducing work efficiency, and further affecting production

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