High-quality manufactured sand production process with sand grinder and dry-method centrifugal powder removal and classification

Abstract

The invention relates to a manufactured sand production process, in particular to a high-quality manufactured sand production process with a sand grinder and dry-method centrifugal powder removal andclassification. The high-quality manufactured sand production process with the sand grinder and dry-method centrifugal powder removal and classification comprises 19 working procedures such as mining,manufacturing sand, shaping, removing powder, classifying, modulating and grading. The process can be used for manufacturing manufactured sand for concrete in C50 and above. A Germany produced RPM sand manufacturing machine is adopted, and a horseshoe gap is adjusted appropriately, so that elongated and flaky manufactured sand is reduced; by adopting an assembly line work sand grinder, edges andcorners of the manufactured sand can be eliminated, the concrete flowability is improved, and the strength is stable; and by adopting a dry-method centrifugal constant linear velocity rotary table, powder is removed and is classified in to six grades according to the standard, and modulation and reasonable grading are carried out, so that the defects of high mud powder content and incomplete grading of wet-method washed-out sand are overcome. The production process is scientific, reasonable, economical and applicable, solves the technical problem that high-quality manufactured sand is in severe shortage in the market since natural sand is restricted due to environment protection in the process of using the manufactured sand for producing the concrete in C50 and above, and fills a technicalgap in the domestic building industry.

Description

technical field [0001] The invention relates to a machine-made sand production process, in particular to a high-quality machine-made sand production process with a sander and a dry centrifugal powder removal and classification. Background technique [0002] Compared with existing patents: [0003] Patent document CN201910039047.1 discloses a dry-type centrifugation machine-made sand dedusting and grading device, which uses a centrifugal method for depowdering and grading, that is, uses a centrifugal turntable to shake off the stone powder in the sand and classifies the sand. But this device centrifugal turntable has the following disadvantages: [0004] 1) The loose sand cone and the centrifugal turntable are co-rotating together, part of the sand will fly out from the loose sand cone, which is not conducive to the classification of sand; [0005] 2) The sand throwing part of the centrifugal turntable is too wide, so that when the sand flies out from each radial position o...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the defects of the above-mentioned dry-process centrifugal machine-made sand dedusting and classifying device, a centrifugal constant linear velocity turntable is proposed, which effectively solves the problem of dedusting and classifying;

[0009] The complete technological process, sand shaping, powder removal and grading and other technical measures of the present invention solve the market demand for high-quality machine-made sand that is seriously lacking due to environmental restrictions on the mining of natural sand, that is, the technical problem of using machine-made sand to produce C50 and above concrete. Make up for the technical gap in the domestic construction industry

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