• January 04, 2018

D&S Trading Co.,Ltd. is professional machine trading company, which respresative for our relative factorys.We supply you first class quality machine with best service. Our machine include all faucets, valve, brass fitting, cartridge, brass parts, teflon tape machines.For more information,welcome to visit our company's website http://www.desuautomatic.com Punc...

• January 05, 2018

D&S Trading Co.,Ltd. is professional machine trading company, which respresative for our relative factorys.We supply you first class quality machine with best service. Our machine include all faucets, valve, brass fitting, cartridge, brass parts, teflon tape machines.For more information,welcome to visit our company's website http://www.desuautomatic.com Faucet production process Faucet p...

• June 03, 2021

At present, more than 80% of copper in the world is made by fire method, and it is mainly used to process copper sulfide ore. Pyrometallurgy is to melt copper ore (or calcine, agglomerate, etc.) and flux at high temperature, or directly smelt into blister copper, or first smelt into matte (melt mainly composed of copper, iron and sulfur) Then smelt into blister copper. Except for some operations (...