Production device for machine-made sand for high-performance concrete

Abstract

The invention provides a production device for machine-made sand for high-performance concrete. The production device comprises a crushing machine, a vibrating screen, a winnowing device, a powder selecting machine and a dust remover. The winnowing device is additionally arranged at the tail end of a gravel production line, only fine grains obtained after crushing and separating are winnowed, andthus the energy consumption can be reduced; then, powder selecting is conducted through the powder selecting machine, the fine stone powder part is collected and stored, the coarse stone powder part flows back into a machine-made sand finished product, and thus the grain grading of the machine-made sand can be improved. The stone powder content of the machine-made sand produced by the production device is obviously reduced, so that the preparation of the high-performance concrete and high-strength concrete is facilitated, the water consumption of concrete per cubic meter is reduced, and the workability of the concrete is improved; the coarse stone powder part in stone powder flows back into the machine-made sand, so that the reasonable grading of the machine-made sand is further guranateed; besides, the by-product fine stone powder can be recycled, and it is unnecessary to consume a lot of water resources.

Description

technical field [0001] The invention relates to the field of machine-made sand production, in particular to a machine-made sand production device for high-performance concrete. Background technique [0002] With the improvement of people's awareness of environmental protection and in order to reduce the damage to natural resources, the use of natural sand has been strictly restricted, and will gradually withdraw from the building materials market and be replaced by machine-made sand. Machine-made sand is a fine aggregate in concrete, which refers to rock particles with a particle size of less than 4.75mm that are broken by machinery. Due to the popularization and application of high-performance concrete, the production of manufactured sand that meets the needs of high-performance concrete is the development trend of the domestic sand and gravel industry. At present, the traditional manufactured sand is produced by crushing and screening, resulting in unreasonable particle gr...

AI Technical Summary

Problems solved by technology

In this technical solution, since the vibrating screen itself has the function of spreading the materials, there is no need to separately increase the vibrating feeder to spread the materials, which reduces the difficulty of machine-made sand production and environmental pollution, and also reduces energy consumption. Extraction, no secondary treatment, too strong or insufficient blower wind control, will cause the particle gradation of the machine-made sand to be unable to guarantee

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