Machine-made sand processing process

Abstract

The invention discloses a machine-made sand processing process, which comprises the following processes that stone materials enter a jaw crusher to be decomposed into stone blocks not greater than 350mm, and then, the stone blocks enter a reverse smashing machine; the stone blocks are crushed into crush stones by the reverse smashing machine, the crushed stone enters a primary vibration sieve to be screened, the crushed stones smaller than 31.5mm enter an impact type crusher, and the crushed stones greater than 31.5mm return the reverse smashing machine to be crushed; after entering the impact type crusher to be crushed, the crushed stones enter a two-grade vibration sieve to be screened, and sand smaller than 3mm enters a sand washing machine; sand greater than 3 to 5mm enters an efficient fine crushing machine to be made into sand smaller than 3mm, and the sand smaller 3mm enters the sand washing machine after entering two-grade vibration sieve to be screened; the crushed stones greater than 5mm enter a three-grade vibration sieve; the crushed stones are screened into the crushed stones in three grades by the three-grade vibration sieve, and the crushed stones are used for material discharge in the vibration sieve after being flushed by water. The machine-made sand produced by the process provided by the invention has the advantages that each index can respectively meet the technical index of high-performance on machine-made sand, and the product quality is high, and stability and reliability are realized.

Description

technical field [0001] The invention relates to a processing technology, in particular to a machine-made sand processing technology. Background technique [0002] At present, the machine-made sand processing process of production and processing is simple. Generally, it only goes through the jaw crusher and then enters the sand making machine to produce sand. Some processing plants use sand washing machines to reduce the stone powder content. The produced machine-made sand has a large fineness modulus and needle pieces There are many particles, the crushing index is large, the stone powder content exceeds the standard (10-20%), the gradation is generally poor, and the index does not meet the requirements of fine aggregate performance in Article 6.2.3 of the "Construction Quality Inspection Standard for Railway Concrete Engineering" TB10424-2010 , The work performance, mechanical properties and durability of the produced concrete are poor, the appearance quality of the concret...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: provide a new machine-made sand processing technology to overcome the excessive content of machine-made sand stone powder and the fineness mold existing in the existing processing technology. Problems such as large number, poor gradation, large crushing index, and many needle particles meet the technical requirements of high-performance concrete with machine-made sand

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