Method for producing low-viscosity marine fuel oil

Low-viscosity marine fuel oil that is obtained from the products of residual raw materials and middle distillate fractions of oil is intended for use in ship engines instead of a diesel fuel. A real-world application of this new composition is of great importance A proposed new composition of low-viscosity marine fuel oil is created by compounding a mixture of oil distillates in accordance with the following parameters. The oil distillate mixture should contain a vacuum distillate fraction 420-490°C, a vacuum distillate fraction 350-420°C and a straight-run diesel fraction 180-350°C taken in certain ratios. This study presents the new fuel composition and its technical advantages over previous analogues. The benefits include improvements in the coking properties and storage stability due to the stability in the pour point indicator.

Coal blend properties and evaluation on the quality of stamp charging coke from weakly coking blends

Stamp charging coking can use weakly coking coal effectively, which can cut the cost for iron and steel enterprises. However, the quality of stamp charging coke has been debated due to lower CSR index. In this paper, the correlation between blend coking properties and quality indices of stamp charging coke is given out through statistical analysis of data from coking production, the effect of blend properties and stamping on the properties of stamp charging coke is estimated through microstructure, and the strength after reaction of stamp charging coke is evaluated through temperature dependence of reacted coke strength and BF smelting. The results show that the stamping permits to use the weakly coking blend with lower G index without impairing the M10 and M40 indices, but the CSR index is decreased. Meanwhile, the reason that the stamp charging coke with lower CSR index can also be used smoothly in BF is presented. The present works are significant to guide the blending of increasing weakly coking coal and evaluate reasonably the quality of stamp charging cokes.