For improving the low flowability, promoting the separation between high Ti-bearing blast furnace slag and hot metal, and replacing CaF2 which would pollute the environment, the influence of B2O3 and CaF2 on apparent viscosity were investigated from 1340°C to 1475°C by SEM, viscometer, et al. The results...

Analyses by X ray diffraction analysis (XRD) indicate that the main mineral composition of the Lower Cambrian black shale in Guizhou is quartz, clay minerals, albite, dolomite and pyrite, the clay minerals are mainly composed of illite. The characteristics of organic carbon in the black shale are discussed....

In this paper, based on the DCF cash flow discount valuation model, and partly using the geological analogy method, we analyse the availability of chromite mineral in China by the provinces and deposits. We eventually calculated the availability data of chromite ore in China at different levels of internal...

The reasonable crusher shifting space should ensure that the comprehensive production cost of the open pit is the lowest. Factors affecting crusher shifting space were analyzed and economic indexes, system links composing and disposal scheme were put forward dealing with semi-continuous system management....

The determination of safety thickness of overlying strata is the prerequisite for the treatment of mined out areas. Taking the mudstone of the Cenozoic Pleistocene as the upper bound of the model and the 1# coal seam floor as the lower bound, the stress and strain of overlying strata under goaf span...

Component identification is a key problem in software reuse. In order to obtain a set of business components (BCs) with high reuse value and good reuse performance to support reuse, a BC design method based on the cluster algorithm was proposed. Through analyzing existing business models, element composite...

In this research alumina ceramic layer on the surface of workpiece was obtained using ultrasonic mechanical aluminizing and micro arc oxidation to realize remanufacturing. Aluminum layer was gotten on the surface workpiece using ultrasonic mechanical aluminizing method. The theory of ultrasonic mechanical...

After coal mining, rock movement, fracture and stress redistribution of roof and floor surrounding rock are caused and mining-induced fracture field is formed. The fractured zone formed in overlying strata is an important channel and space for gas discharge and storage. The efficient gas drainage can...

To combat air pollution and safety hazards caused by volatile organic compounds (VOCs) of dynamic and static sealing point of equipment in petroleum refinery industry. This paper, firstly, builds the five-part procedures based on leak detection and repair (LDAR) for VOCs treatment and assessment, which...

In view of reform tasks that state-owned large-scale power grid enterprises need to implement in aspects of state-owned assets and enterprises reform, power system reform and enterprise internal management reform, a key task identification model covering continuity degree of influence, national requirement...

This paper introduces the working principle, main technical parameters and main advantages of Fann Permeability Plugging Apparatus (PPA) and Automated Permeability Plugging Apparatus (APPA), a new type of high temperature and high pressure filtration plugging test instruments, which are popular at present....

Characteristics and spatial distribution of nitrate concentration and its isotopic composition were used for identifying pollution mechanisms and sources in groundwater. An aquifer downstream of Dagu River in Jiaozhou city was taken as an example which was seriously contaminated with nitrates. The results...