Low-density and high-strength ceramsite proppant prepared by utilizing bauxite tailings and fly ash

Abstract

The invention discloses a low-density and high-strength ceramsite proppant prepared by utilizing bauxite tailings and fly ash. The low-density and high-strength ceramsite proppant is prepared from thefollowing raw materials in parts by weight: 50-80 parts of the bauxite tailings, 50-70 parts of the fly ash, 15-20 parts of sintering aid, 20-30 parts of manganese mineral powder, 5-10 parts of quartz sands, 2-8 parts of aluminum oxide powder and 20-30 parts of water. A preparation method comprises the following steps of S1, crushing and dry grinding: crushing the bauxite tailings, then performing continuous dry grinding on the crushed bauxite tailings, and weighing the bauxite tailings after dry grinding, ready for use; and S2, mixing: weighing the fly ash, the quartz sands and the sinteringaid according to a proportion, putting the weighed fly ash, quartz sands and sintering aid in a ball mill for wet milling, and adding the quartz sands and the manganese mineral powder for mixing to obtain a mixture. By taking the bauxite tailings as a raw material, the low-density and high-strength ceramsite proppant provided by the invention can improve the ecological environment, turns harm into good, changes waste into valuable and is improved in the strength and simple in preparation method.

Description

Technical field [0001] The invention relates to the field of proppants, in particular to a low-density and high-strength ceramsite proppant made of bauxite tailings and fly ash. Background technique [0002] With the rapid development of China's alumina industry, the amount of bauxite tailings is also increasing. Together with the excavated and stripped waste rock and topsoil, it has occupied and polluted large areas of land and fertile land, and damaged the ecological environment. It affects people’s normal life. Therefore, the use of mine tailings as a secondary resource can improve the ecological environment, turn harm into profit, and turn waste into treasure. Countries all over the world have included it in the scope of resource management, with varying degrees of Research and comprehensive utilization have been done. At present, the comprehensive utilization of bauxite tailings as secondary resources in China has attracted great attention from relevant departments. Therefor...

AI Technical Summary

Problems solved by technology

[0003] Bauxite tailings usually refer to the bauxite whose aluminum content is less than 50% in the mining of bauxite, which is called bauxite tailings. It is stripped out during mining or less, because the tailings It contains a large amount of iron, titanium, potassium, sodium and other alkali metal ions, and the components of many production areas are quite different, which makes it difficult to utilize bauxite tailings. Usually, after modification (reduced by industrial methods) Impurity content) used in glass or refractory materials, but only limited to some low-end products or a small amount of addition, no one has used bauxite tailings and fly ash with wet process modification to make ceramsite proppant. Therefore, we propose to use bauxite tailings and fly ash to make low-density and high-strength ceramsite proppants to solve the above problems