Intermediates refer to semi-finished products, which are intermediate products in the production of some products. For example, if you want to produce a product, you can produce it from the intermediate to save cost. Pharmaceutical production needs a large number of special chemicals, most of which were produced by the pharmaceutical industry itself. However, with the deepening of social division of labor and the progress of production technology, the pharmaceutical industry has transferred some pharmaceutical intermediates to chemical enterprises for production. Pharmaceutical intermediates are fine chemical products. The production of pharmaceutical intermediates has become a major industry in the international chemical industry. Pharmaceutical Intermediate,Syntheses Intermediates,Organic Pharmaceutical Intermediate HENAN JINHE INDUSTRY CO.,LTD , https://www.hncarbonblack.com
The part of the ore that has no use value or cannot be used is called gangue. For example, tungsten ore is mostly formed in the quartz vein, and this quartz vein is called gangue.
The rock around the ore body is called a surrounding rock. The surrounding rock in the upper part of the ore body is called the surrounding rock or the top plate; the surrounding rock in the lower part of the ore body is called the surrounding rock or the chassis, and the rock sandwiched in the ore body is called the stone.
The surrounding rock and stone of the ore body are called waste rock, and the concept of waste rock and ore is relative. The rock with no industrial grade collected in the mining process is called waste rock.