Gradation design method of tailing autoclaved bricks

Abstract

The invention concretely relates to a gradation design method of tailing autoclaved bricks. The technical scheme is as follows: mathematical models of the particle size di of an aggregate of the tailing autoclaved bricks and the pass percentage Pdi of the particle size the established, i.e., Pdi=62.25 (di / dmax) 0.22+37.75 (di / dmax)K. The gradation design method comprises the following steps of: firstly, selecting the maximum particle size (dmax=1-7mm) of the aggregate by combining the characteristic of a tailing particle size, then determining a gradation modified index K, and then obtaining the pass percentage Pdi of different particle sizes di according to the mathematical models; and finally, obtaining tailing mixing content Ct=Pdi / Sd1*100wt%, d1-d2 size fraction adjusted aggregate mixing content Cd1-d2=Pd1-d2-(Sd2-Sd1)*(Pd1 / Sd1),......, d(n-1)-dn size fraction adjusted aggregate mixing content Cd(n-1)-dn=Pd(n1-1)-dn-(Sdn-Dd(n-1))*(Pd1 / Sd1) according to a minus cumulative yield Sd1of the particle size di in the characteristic of the tailing particle size. The gradation design method can be used for remarkably reducing the researching and manufacturing costs and the labor intensity and effectively promoting the utilization of tailings in the field of autoclaved bricks, and has the characteristics of high tailing utilization ratio and good strength.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a gradation design method of tailings autoclaved bricks. Background technique [0002] Tailings are solid waste discharged during the beneficiation process and are an important part of industrial solid waste. The traditional method of dealing with tailings is to build tailings ponds for stacking, which not only takes up a lot of land, but also brings environmental pollution and tailings pond safety issues. At present, tailings are mainly used in the field of building materials, as raw materials for cement, wall materials and decorative materials. With the gradual deepening of the country's "no sticking" work, tailings autoclaved bricks are autoclaved bricks made of tailings as the main raw material. They are new building materials and are favored by various departments because of their good product performance. [0003] The preparation process of tailings...

AI Technical Summary

Problems solved by technology

It is not difficult to see that beneficiation tailings generally have the characteristics of fine particle size, but the amount of fine-grained grade calculated according to the current gradation design method is too small, resulting in low utilization rate of tailings, which cannot meet the requirements of large-scale and efficient use of tailings. requirements

However, there is no suitable method for the gradation design of autoclaved bricks with high tailings content. In actual production, the gradation formula is generally obtained through experiments, but this often increases the development cost and labor intensity.

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