Gold beneficiation and processing technology

The gold content in the ore is very low, in order to extract gold ore crushing and grinding necessary and the use of pre-enrichment, or beneficiation method of separating gold from ore manipulation. The most used in gold bene

Chemical pump mechanical seal device essentials and leakage analysis

Reasons for leakage of chemical pump mechanical seals The proportion of leakage of mechanical seals accounts for more than 50% of all chemical pump repairs. The work of mechanical seals directly affects the normal operation of centrifugal pumps. Leakage of mechanical seals can be roughly c

Minimum prediction method for tolerance of each corner of gear


The change of pressure angle is one of the factors affecting the tooth shape error. The main process cause is the tooth profile angle error of the tool. Since this error can be considered as a constant value, the young and small are generated by the linear relationship. The tooth profile e

The history of importing drying equipment in China has ended

China's drying equipment industry has gone through more than 20 years of history, forming a certain number of enterprises and production scale. Today, drying equipment is widely used in chemical, pharmaceutical, agricultural and forestry products, food, light industry and other fields. At