A kind of machine-made sand with tailings sand as the main raw material and its dry process

Abstract

A machine-made sand and dry-process production process with tailings sand as the main raw material, which relates to the production process of machine-made sand and solves the problem that tailings sand cannot be reused as machine-made sand. The process uses raw materials whose particle size is less than 5mm and cannot be used as concrete. The tailings sand of the medium sand raw material can be mixed with 0-50% of crushed stones larger than 5mm, through the raw material desilting process, the process of separating fine sand, coarse sand and crushed stone, the process of finely crushing coarse sand and crushed stone, and the process of fine sand dedusting , coarse sand and fine sand mixing and humidification process, etc., to make the tailings sand into qualified machine-made sand. The quality of the machine-made sand produced by this process has reached the standard of medium sand for construction, which can solve the problem that the current tailings sand cannot be effectively used. problems, and can replace natural sand, so as to achieve the purpose of protecting the environment.

Description

technical field [0001] The invention relates to a manufacturing process of machine-made sand, in particular to machine-made sand with tailings sand as the main raw material and its dry-process manufacturing process. Background technique [0002] As one of the main components of concrete, sand plays the role of filling and anti-deformation in concrete products, which can improve the compactness, mechanical stability and durability of concrete, and has a great impact on the quality of concrete engineering. Relevant data show that in 2016, the total production and sales of construction sand and gravel in my country was about 15 billion tons, of which the total output of sand was about 5 billion tons, and the industry output value was nearly 1 trillion. [0003] The amount of construction projects in my country is huge, and the natural sand used in construction is mainly river sand, river sand, sea sand and plain underground egg sand. After nearly half a century of high-intensi...

AI Technical Summary

Problems solved by technology

[0011] 2. The two sets of complete sets of sand-making equipment generally have higher requirements for raw materials containing water and mud powder, higher installed power per ton of production capacity, and higher requirements for anti-vibration design of the steel structure of the sand-making building

In general, the above-mentioned patented technologies either have more restrictions on raw materials; or have higher requirements for production process control; or only focus on the control of some process quality indicators, or have high installed power and complicated production processes

Images