Low-density high-strength ceramsite proppant and preparation method thereof

Abstract

The invention relates to a low-density high-strength ceramsite proppant and a preparation method thereof. The low-density high-strength ceramsite proppant comprises the following raw materials in parts by mass: 33 to 55 parts of bauxite tailing, 27 to 43 parts of flint clay, 7 to 18 parts of quartz sand, 1 to 7 parts of iron oxide red powder and 1 to 12 parts of aluminum oxide powder. The preparation method comprises the following steps: (1), crushing the raw materials, mixing the materials according to the ratio, crushing, grinding and spray-drying to obtain powdered and granular materials; (2), forcibly balling the powdered and granular materials, drying, sieving, sintering and sieving again to obtain a finished product. The low-density high-strength ceramsite proppant is low in density, high in strength, low in turbidity, low in acid solubility and excellent in roundness and sphericity; the unit-time oil and gas production per unit time is increased and the service life of an oil-gas well is prolonged; the bauxite tailing resources in China are utilized completely, the market pattern and the current situation of fracturing proppants at home and abroad are changed, and the pressure about excessive demand of the high bauxite and insufficient supply of the high bauxite is reduced.

Description

Technical field [0001] The invention relates to a proppant, in particular to a low-density and high-strength ceramsite proppant and a preparation method thereof. Background technique [0002] Low density and high strength ceramsite proppant has the following advantages: [0003] 1. The volume density is low, and the quality injected with the same volume is small, which is an energy-saving material. 2. The apparent density is low, and it can be suspended in a low-concentration sand mixing liquid, which is beneficial to the preparation of the sand mixing liquid, facilitates pumping during fracturing, and can form more effective diversion channels. 3. Increasing the output and service life of oil wells plays an important role in improving the economic benefits of oil wells. 4. High strength, suitable for most oil wells at home and abroad. In short, low-density and high-strength ceramsite proppants have good application prospects and are also a direction for the development of ceram...

AI Technical Summary

Problems solved by technology

[0004] However, at present, most ceramsite proppant manufacturers use high-alumina bauxite with a large aluminum-silicon ratio as the main raw material to produce medium-density ceramsite proppant products; at this stage, industry competition is intensifying, and large-scale and batch-scale high-alumina bauxite that can be mined and utilized Mining and other non-renewable energy sources are also greatly reduced, and the taste is also rapidly developing from high-grade mass production to medium and low-grade decentralization. At the same time, the price is constantly rising, which not only occupies a large amount of land, but also pollutes the environment. , it is urgent to process and comprehensively utilize the associated large quantities of low-grade ore or tailings with high content of impurities to produce products with higher added value