Through analyzed and regressed the actual productive desulfurization data from the oversize blast furnace (5500 m 3 ) in north China, the relationship between the sulfur distribution parameters and the slag composition in actual production situation was investigated. As the slag and hot metal phases have their own balance sulfur content or sulfur partial pressure in gas phase, respectively, the non-equilibrium of sulfur among gas, slag, and metal phases leads to the transmission and distribution of sulfur. Combined with sulfur transmission reactions between gas, slag and metal phases, C/CO pairs equilibrium, and Wagner model, the measured sulfide capacity can be acquired using sulfur distribution ratio, sulfur activity coefficient, and oxygen activity in hot metal. Based on the theory of congregated electron phase, a new sulfide capacity prediction model (CEPM) has been developed, which has a good liner relationship with the measured sulfide capacity. Thus, using the burden structure for BF, the ironmaking slag composition can be obtained simply and can be used to reliably predict the ironmaking slag desulfurization ability a few hours later after charging under a certain temperature by CEPM.

An oligotrophic bacterium was isolated from the biological soil crust underlayer in the Xinjiang Gurbantunggut Desert. It was numbered SGB-5, G + . Cell size is (0.328-0.746) µm×(0.171-0.240) µm. Raised colony is white, roundness and its diameter is 5 mm. The strain is a facultative aerobe. It was able to grow in conditions of 1-15 mg·C·L −1 culture medium at 10-50℃. The strain's optimum growth temperature is 37℃. The range of its optimum growth pH is 8-9. A large amount of extracellular mucopolysaccharide was secreted during growth. The chemical composition of this mucopolysaccharide consists of arabinose, X sugar, glucose, galactose and mannitol. Mole ratio of these sugars is 1 : 14 : 19 : 6 : 14. The viscosity of the mucopolysaccharide can reach 6300 mPa·s, when the strain is cultivated for 72 h. After the culture solution in which viscosity was 1500 mPa·s was sprinkled on the quicksand surface, 6 mm bacteria crust of conglutinating sand was formed. This crust could not only stabilize sand, but could also potentially slow the rate of the soil water evaporation.

From the whole plants of E. ritro L., the three new sesquiterpenoids (3a,4a,6a)-3,13-dihydroxyguaia-7(11),10(14)-dieno-12,6-lactone (1), (3a,4a,6a,11b)-3-hydroxyguai-1(10)-eno-12,6-lactone (2), and (11a)-11,13-dihydroarglanilic acid methyl ester (¼ (4b,6a,11a)-4,6-dihydroxy-1-oxoeudesm-2-en-12-oic acid methyl ester; 3), together with eight known sesquiterpenoids, were isolated. Their structures were elucidated through analysis of spectroscopic data including extensive 2D-NMR.