Compound fusion inhibitor capable of increasing fusion temperature of coal ash with low ash fusion point

Abstract

The invention discloses a compound fusion inhibitor capable of increasing fusion temperature of coal ash with a low ash fusion point and belongs to the technical field of coal gasification improvement. The compound fusion inhibitor comprises raw materials in parts by weight as follows: 1-30 parts of calcium-based flux and 1-30 parts of aluminium oxide. The calcium-based flux is doped into the fusion inhibitor aluminium oxide, so that the fusion point of the coal ash can be increased effectively, coal with low ash fusion point can meet gasification requirements, viscosity-temperature characteristics can be improved, gasification efficiency is increased, cost can be reduced, and the coal with low ash fusion point can be applied better.

Description

technical field [0001] The invention relates to a composite anti-melting agent for improving the melting temperature of coal ash with a low ash melting point, and belongs to the technical field of coal gasification improvement. Background technique [0002] The chemical composition of coal ash is often expressed in the form of various oxides, generally including: SiO 2 , Al 2 o 3 , Fe 2 o 3 , CaO, MgO, TiO 2 , Na 2 O, K 2 O, P 2 o 5 , SO 3 Wait. According to its own properties, it can be divided into acidic oxides (SiO 2 , Al 2 o 3 ,TiO 2 ) and basic oxides (Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O) Two types, it is generally believed that the more acidic oxide content, the higher the ash melting temperature, and the higher the basic oxide content, the lower ash melting temperature. [0003] The melting temperature of coal ash is an important indicator of coal conversion (combustion or gasification). The ash melting temperature is closely related to the choice ...

AI Technical Summary

Problems solved by technology

[0005] The methods to increase the melting point of coal ash include adding a melting inhibitor and adding coal with a high ash melting point. The commonly used melting inhibitors include alumina and silicon oxide, but the research on calcium-based flux and alumina composite melting inhibitor has not been reported.