Among the material industries in Chongqing City, the degree of SD of ferrous material industry was the lowest, the degree of SD of nonferrous material industry was the highest.
Among the material industries in Gansu Province, the degree of SD of ferrous material industry was the lowest, the degree of SD of metal products industry was the highest.
Tests were carried out for the treatment of chromium containing wastewater using a porous ferrous material made from concentrated breeze and ferric oxide. The result shows that when the particle size of the porous ferrous filter material is 1.45-2.00 mm,the pH value is 5-6 and the temperature is 20 ℃,the removal rate of Cr6+may reach 95%and that of total chromium may exceed 80%.
Some concept about screening and washing installation for quartz,handling for reducing agent,proper use of ferrous material,burden mixing and transportation are presented.
Tailings from the Mo bearing iron ores of the Xianlinbu mine,Hangzhou can be used to replaceall the ferrous material and mineralizing agent (gypsum) for cement production.
Die wall lubrication was applied in combination with warm compaction in hope of increaseing the compact density and the mechanical property of the sintered ferrous material.
Shear tests of the welds also show very high strength, probably as a consequence of simultaneous brazing because of the alloyed layer of non-ferrous material around the weld spot.
The magnetic survey method is shown to be the most successful technique although the best results were obtained where the shaft filling contains ferrous material.
This paper proposed the burden preparation measures in designing and manufacturing.Some concept about screening and washing installation for quartz,handling for reducing agent,proper use of ferrous material,burden mixing and transportation are presented.
Tailings from the Mo bearing iron ores of the Xianlinbu mine,Hangzhou can be used to replaceall the ferrous material and mineralizing agent (gypsum) for cement production.This technique opensup a new path to produce low priced cement by raising its output and quality and cutting down theproduction cost.In addition,it makes full use of the scrap material tailings.
A lot of non-ferrous pressure vessels are manufactured and used in China. Some non-ferrous pressure vessel codes have been established continuously. A complete system of Chinese non-ferrous material standards are being formed. This paper discusses the usability of current standards for pressure vessel.