Dry-breaking wet-screening sand making process

Abstract

The invention discloses a dry-breaking wet-screening sand making process which sequentially comprises the following steps: crushing, adding water for mixing, and screening fine aggregate: mixing sand and water to obtain a mixture, discharging the mixture from a discharging hopper, screening in fine aggregate screening equipment, feeding a sand-water mixture at the bottom of the fine aggregate screening equipment into a sand washer, and washing the sand-powder-water mixture by the sand washer, dewatering sand by a dewatering screen and then enabling the sand to enter a finished sand conveying rubber belt machine, and classifying the water-sand mixture into a 0.5 mm sand powder-water mixture through a first screen of a high-frequency screen of the fine aggregate screening equipment. the aggregate entering the screen behind the sand washer is basically particles with the particle size larger than 0.5 mm, the viscosity is poor, the screen is not pasted, and therefore the functions of classification and dewatering can be well achieved. The moisture content of the return material with the fineness modulus of 20-40 mm after screening is controlled to be smaller than 3%, the return material is conveyed to a vertical shaft crusher through a conveying belt to be crushed, and the problem of adhering to the cavity by the material, of the vertical shaft crusher is solved; and the shaped aggregates with the fineness modulus of 5-20 mm are classified and stacked by a small stone conveying rubber belt, wherein the content of needle sheets is less than 3%.

Description

technical field [0001] The invention relates to a dry crushing and wet sieving sand making process, which belongs to the technical field of sand and gravel production. Background technique [0002] Breaking stones can be made into sand and gravel materials required for the construction of roads, bridges and houses. It is easy to generate dust and pollute the environment. In order to reduce dust and increase the moisture content of recycled materials, but the moisture content is high. When preparing sand particles <5mm, the dust after the stone is broken will combine with water particles, which is easy If there is a problem of paste cavity in the crusher, it is necessary to clean the crusher without interruption, which reduces the production efficiency. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a sand making process of dry crushing and wet sieving. [0004] The present invention is achieved through...

AI Technical Summary

Problems solved by technology

[0002] Breaking stones can be made into sand and gravel materials required for the construction of roads, bridges and houses. It is easy to generate dust and pollute the environment. In order to reduce dust and increase the moisture content of recycled materials, but the moisture content is high. When preparing sand particles <5mm, the dust after the stone is broken will combine with water particles, which is easy There is a problem with the paste cavity of the crusher, and it is necessary to clean the crusher without interruption, which reduces the production efficiency

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