Coal chemical gasified slag sintered brick and preparation method thereof

Abstract

The invention discloses a coal chemical gasified slag sintered brick. The coal chemical gasified slag sintered brick is mainly prepared from following raw materials in percentage by weight: 15%-45% ofgasified slag coarse slag, 8%-15% of gasified slag fine slag, 39%-75% of building waste soil, 0.1%-1% of additives. The invention further provides a method for preparing the coal chemical gasified slag sintered brick. According to the coal chemical gasified slag sintered brick, the gasified slag and the building waste soil are adopted as the raw materials of the coal chemical gasified slag sintered brick, thus the cost is low, pollution caused by gasified slag discarding to the environment can be reduced, the purposes of fuel saving, natural land resource saving and waste-utilizing environmental protection are achieved, the finished product rate of the sintered brick prepared by the method reaches 90% or above, the compressive strength of the sintered brick exceeds 20 MPa, the high void ratio and good water absorption are achieved, and heat preservation and insulation properties of the sintered brick are both significantly improved.

Description

technical field [0001] The invention belongs to the technical field of making bricks from waste materials, and in particular relates to a coal chemical gasification slag sintered brick and a preparation method thereof. Background technique [0002] Over the years, the proportion of coal in my country's primary energy production and consumption structure has remained at about 70%, and more than 90% of coal is mainly used in industrial production in the national economy, and oil and natural gas account for 20% and 3.5% respectively. Although the promotion of the use of green and clean energy has reduced the proportion of coal, as of now, the proportion of coal consumption in my country's primary energy consumption is still as high as 60%. Coal-rich, oil-poor, and gas-poor characteristics make coal the dominant position in my country's energy structure will not change in the short term, and industries such as coal-to-gas and coal-to-oil, which use coal gasification as one of th...

AI Technical Summary

Problems solved by technology

However, a one-million-ton coal indirect gas and oil project will produce more than 600,000 to 900,000 tons of coal gasification slag every year. The residue after coal gasification occupies about 300 acres of land, which not only pollutes the environment but also causes waste of resources