Applying atomic absorption spectrophotometry to the determination of gold and silver in electrolytic anode slime of cuprocuprite not only can keep out of the disadvantages of fire assay,such as long flow path,great labour intensity,high cost and so on ,but also has the advantags of high accuracy
By means of evacuating directly from the cavity of die can solve many problems in magnesium alloy thin shell die cast formation,such as long flow path and difficult to fill. At the same time,the oxidization and internal porosity of magnesium alloy were lessened,the density of the die cast was improved,deformation was diminished and surface quality was increased.
Hydrometallurgy has broad prospect on extraction and separation of metals from complex ores and low-grade ores,bring the processes into correspondence with environment protection. But the traditional hydrometallurgy has two main disadvantages:longer procedure and higher energy consumption.
The result show that Kroll method has the disadvantage of long process, complex working procedure, and so on, so the cost of sponge Titanium always is high.
About 85% water in the products must be evaporated using massive energy, which brought about the disadvantages, such as long process flows, large equipments and enormous waster of energy and affected the cost of production of EG seriously.
This paper bring forward a business process transaction model of web service-BPTM, and defines web service process transaction based on apply beforehand and functional alternation characteristics, and introduce their collaboration protocols.
Group I patients did have significantly longer procedure times (213 vs 175 min, p>amp;lt;0.05) and hospital stays (5.67 d vs 3.81 d, p>amp;lt;0.05) than Group II.
In general,the conventional pretreatment for cotton knits includes preparation,scouring and bleaching.Such process is complicated,time -consuming and troublesome in quality,if treated improperly.The new process we proposed is strong chlorine beaching the unscoured cotton knits first,and followed by weak peroxide bleaching.From our experiments,some processing factors were obtained.Then the combined bleach was optimized according to the orthogonal design of experiment,and an intermediate test was conducted at...
Lechnological process, in an oil refiney.is a long and complex procedure. In this paper, we apply the theory of system engineering and "Black-Box" principle to establish a mathematical model for an Oil refinery technological process design. The model has completely described the procedure in production for an oil refinery, it is more satisfactory, more clear and more use-wide than the model[1],[2].Especially, the model can be con??eniently outo-created by computer.
Complicated technologies, long process and more types and specifications being the production characters of metallic products, with different product structure and equipment in different enterprises, not only the big difference of their specific energy consumption but also much difficulties to formulate the Grade Standard of Process Energy Consumption for Metallic Products Enterprises have been brought. From the point cf view of the investigations of the prcblems in fcrmulating the standard this paper mainl...