Method and system for water-power engineering mixing sand making

Abstract

The invention relates to a method for water-power engineering mixing sand making which includes the following steps: 1) feeding stones in a crushing unit and crushing; 2) screening the stones with the grain under 40mm crushed by the crushing unit in a screening unit; 3) feeding aggregate in a second sand making raw material bin (II) into an impact type crusher and curshing, and feeding the crushed mixture in a vibration screen (16) dehydrating and grading; 4) feeding the aggregate with the grain size of 5-20mm in a first sand making raw material bin in a rod mill and crushing, feeding the crushed sand into a third spiral sand washer (12), then feeding into a product sand bin (20) after dehydrating in a third dehydrating screen (15). The method updates a traditional sand making method and uses the impact crushing machine to serve as main sand making equipment in a sand making process, and the impact type crusher machine, the rod mill, the vibration screen and the like jointly form a mixing sand making method applicable to water-power engineering. The system and the method can achieve high-strength production and meet high-quality requirements, reduce building and installation cost, improve the whole use ratio of the equipment and reduce cost.

Description

technical field [0001] The present invention relates to the preparation of building materials. Specifically, the present invention relates to the technical field of hydropower engineering artificial sand and gravel aggregate production, in particular to a method and system for mixing sand in hydropower engineering. Background technique [0002] The concrete production of large-scale water conservancy and hydropower projects requires a huge amount of sand and gravel, high production scale and intensity, and long peak production duration. The production and operation of artificial sand and gravel processing and generation systems must not only ensure that the output meets the needs of project construction, but also ensure the system production. The quality of finished products meets the quality standards required for engineering construction, thereby ensuring the quality of concrete engineering. [0003] The traditional domestic artificial sand and gravel processing and produ...

AI Technical Summary

Problems solved by technology

However, the impact crusher has the disadvantages of large sand fineness modulus, less medium-diameter sand and gravel, and poor adaptability to various concrete ratio requirements, which seriously affects the quality of concrete.

[0004] At present, vi series impact sand making machines are generally used in China. Its advantages are mainly manifested in simple and reasonable structure, low operating cost, low wear, high crushing rate, energy saving, etc., but it also has many shortcomings, such as being affected by material moisture. The impact of the content is relatively large, the water content is low, and the dust pollution is serious; some equipment is noisy when it is working, and its working efficiency is significantly reduced in the case of poor maintenance conditions, and the scope of application is small, and it is only suitable for crushing. Hard and extra hard materials

[0005] Chinese patent CN101708968B discloses a method for the preparation of machine-made sand fine aggregate. The sand and gravel mixture with a particle size above 16 mm is crushed and sieved, and the machine-made sand is combined with the ultra-fine sand with the smallest particle size to produce The machine-made sand fine aggregate with a certain fineness modulus overcomes the shortcomings of the original sand making system that cannot control the fineness modulus, but in the most critical sand making process, a single sand making machine is still used. processing, unable to meet the needs of high-intensity production and continuous production required by hydropower projects

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