The purpose of the test is to provide a basis for the development and utilization of the mine. Baoji Graphite Mine is a graphite-rich metamorphic rock-schist, mainly composed of mica graphite quartz schist, followed by sericite graphite quartz schist, muscovite calcite schist and zoisite tremolite graphite quartz schist. The original rock is a set of fine debris rich in carbon – argillaceous. Some contain siliceous and calcareous (carbonate). The metamorphic mineral combination is dominated by biotite + muscovite + quartz, and the metamorphic phase corresponds to the high green schist facies, which does not exceed the low amphibolite facies. There are still many sericite and carbonaceous residues in the rock that are equivalent to the low-green schist facies, indicating that the metamorphic time is short, and the deterioration is not complete. The graphite ore has a fine particle size, varying from 0.35 to 0.03 mm in length, 0.05 to 0.003 mm in width, and 15:1 to 3:1 in aspect ratio; concentrated in length 0.2 to 0.05 mm, width 0.025 to 0.005 mm, length and width. Between 10:1~5:1. Graphite crystals tend to be burr-like around, and the degree of graphite crystallization is poor. According to the characteristics of Baoji graphite mine, the multi-stage grinding multi-stage sorting process can obtain 87.60% of graphite concentrate containing graphite carbon, and the recovery rate is 91.38%. More ideal. Industrial ball valves are wildly used in all type of industrial pipelines, such as power stataion, petrochemical, oil refinery, natual gas,water treatment ect. Trunnion Ball Valve, floating ball vavle, 2 pcs Ball Valve , 3 pcs ball valve, Forging Ball Valve,Casting Ball Valve, Metal Seal Ball Valve and soft seal ball valves with ASME standard are commonly used by customer. Industrial ball valve we provided are with soft and metal seal type and valve size are from 1/2 inch to 42 inch(DN15-DN1050) matching pressure from class 150 to class 2500(PN10-PN420) which are suitable for operating in the working media temperature from -196℃ to 620℃, as well as material in carbon steel, stainless steel, alloy steel and duplex steel in casting material or forging material. Ball Valve Ball Valve,Forging Ball Valve,Casting Ball Valve,Metal Seal Ball Valve Yongjia South Trading Co.,Ltd , https://www.n-lvalve.com