Desulfurization Experimental Study on Flotation for High Sulfur Coal from Liupanshui, Guizhou Province, China

Abstract

The total sulfur rate of the coal sample was 4.973%, the inorganic sulfur content was more than 60%, which was the main component in the coal sample. The effect of grinding fineness, flotation pulp density, collector and frother on coal flotation desulfurization were investigated in this paper to remove the inorganic sulfur. The results showed that it reached to the optimum desulfurization rate 54.7% when the optimum grinding fineness was 39.20% -200 mesh rate, pulp concentration was 80 g/L, kerosene consumption was 1.4 kg/t, 2#oil loading was 100 g/t, and the total sulfur content reduced to 2.72%. The optimized flotation condition determined by orthogonal experiments was as follow: pulp density for 60 g/L, kerosene dosage of 1.4 kg/t, 2#oil consumption of 100 g/t. In this case, total sulfur content reduced to 2.19%, the total desulfurization rate and the inorganic desulfurization rate were 55.96% and 92.89%, respectively.

Research on Prediction of Weathering Degree of Carbonaceous Mudstone Based on Entropy Weight-Cloud Model

“…Carbonaceous mudstone is a kind of mudstone, because it contains a certain amount of organic carbon, so it is called carbonaceous mudstone. Depending on the geology and region, its carbon content can reach 6% to 30% [1]- [2] . Compared with other soft rocks, in addition to its low hardness and poor hydraulic properties, it is also very easy to weather.…”