Effect of iron powder by cold rolled friction as flux on the melting characteristics of coal ash from Jiulishan Coal Mine in Henan province

In order to utilize the wastes of magnetic filtration products in cold rolling by combining with the requirements of liquid slagging in large scale coal gasification furnace,the properties of iron powder from the magnetic filtration products in cold rolling emulsion were characterized.The effect of iron powder as flux on coal ash melting characteristics from Jiulishan coal mine in Henan province( RC) was investigated.Results show that the particles size distribution of iron powder is between 0. 6 μm and 16 μm,and the iron content is more than 98%( metal content based on metals oxide).Mullite formed under high temperature leads to a high coal ash melting temperature with 1 510 ℃,and the coal ash melting temperature will be decreased to 1 340 ℃ with addition of 2% flux of iron powder.The low temperature eutectic mixtures,such as fayalite and hercynite,are easily generated from ferrum compounds under high temperature,which will remarkably decrease coal ash melting temperature.