I: Name: Silver Chemical Symbol: Ag
II: The state of Silver ore in the nature
1. Combining ore, most exist copper ore vein
2. Associated gold ore 
III: Mining standards
Most of the silver is associated copper ore, copper, lead, zinc, copper, nickel ore and gold deposits, these main components can extract out the silver, so no fixed requirements in the industry.
silver deposit：cut-off grade 40-50g/t, industrial grade 100-120g/t, Deposit average grade 140-150g/t，minable thickness ≥0.6-1m, the rock eliminate thickness ≥2-4m
IV：Quality requirement of Fine Powde
Silver ≥ 3000g/t named silver concentrate, Copper and lead concentrate contain silver 1000～300 g/t named Silver copper, silver lead mixed concentrate. 
V：The strong point of Henan Dajia Mining Machinery Co., Ltd
1.Design the professional production plant;
2.Assay Ore, Appraisal Ore;
3.Research of mining process and Plant design;
4.Equipment provide, Install and Guide;
5. Undertake Turnkey Project