chemical purification

基本解釋

Nuclear pure natural flake graphite has been obtained by chemical purification process.
用化學(xué)提純工藝制出了核純天然石墨粉；
Answer: want first choice, remaking sand, through the magnetic separation, flotation or chemical purification, silica be 95 percent.
答：先要精選，再制砂后，經(jīng)磁選、浮選或化學(xué)提純后，二氧化硅能達(dá)到95%。
The investment and purification cost of chemical purification method is considered lower in producing feed grade, industrial grade, food grade phosphate by using WPA;
認(rèn)為，用濕法磷酸制飼料級、工業(yè)級和食品級磷酸鹽產(chǎn)品，采用新化學(xué)凈化濕法磷酸投資少，凈化成本低；