Production system and method for high-grade machine-made sand and high-grade rock flour

Abstract

The invention discloses a production system and method for high-grade machine-made sand and high-grade rock flour and solves the problems that the fineness of the rock flour cannot be accurately controlled and the use ratio of the rock flour is low in a conventional machine-made sand system. The production system comprises a crusher (1), a grading controller (2), a grain-shape optimization machine (3), a fine-powder selecting device (4), a negative-pressure recycling device (5) and a conveying device. The production method is characterized in that after being crushed by the crusher (1), rubbles are conveyed to the grading controller (2), and the grading of the machine-made sand is finely controlled, unqualified materials are returned to the crusher (1) to be crushed again, and meanwhile, the rock flour in the machine-made sand is sucked by the negative pressure generated by the negative-pressure recycling device (5); the fine-powder selecting device (4) is arranged between the grading controller (2) and the negative-pressure recycling device (5) and be used for accurately controlling the fineness of the rock flour entering the negative-pressure recycling device, and the rock flour which cannot meet the fineness requirement enters the grading controller (2) for regulating the grading of the machine-made sand or enters the crusher (1) to be crushed again.

Description

technical field [0001] The invention relates to a production system and production method of high-quality machine-made sand and high-quality stone powder, more specifically, the invention relates to a production system and method for precisely controlling the fineness of redundant by-product stone powder produced in the machine-made sand production system. Background technique [0002] There are mainly two types of sand making systems and methods on the market: dry sand making and wet sand making. The vertical shaft impact crusher is the main equipment for producing machine-made sand, and a lot of stone powder will be produced during the sand making process. [0003] Limestone powder has great application value in building materials, chemical industry, papermaking and other industries, but there are different requirements for limestone powder in different application fields. In addition to the composition requirements of limestone, another important requirement is the finenes...

AI Technical Summary

Problems solved by technology

In the production process of wet machine-made sand, most of the fine powder is washed away with the soil and thrown away as waste products, causing waste of resources and environmental pollution. The wet sand making is gradually replaced by the dry sand making process; in the dry machine-made sand production process, the final Machine-made sand is used for powder removal, and the dust is collected by a dust collector for recycling. The existing process cannot accurately control the fineness of the stone powder. This process has three disadvantages: First, the fineness of the finished stone powder cannot be precisely controlled, so Second, the fine particles of machine-made sand are mixed in the stone powder, which reduces the sieving rate of the stone powder. Third, the content of stone powder in the machine-made sand is not easy to control.

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