Metallurgical chromite ore grade and mining technical indicators
Metallurgical grade chromite ore and mining with technical indicators Note 1: chrome ore or concentrate for metallurgy, ω(Cr2O3)/ω(FeO)>2 during pyrometallurgical smelting (metal chromium is not restricted by wet method); ω(SiO2)≤8% The ore-heating method is not limited by the smelting of high-carbon ferrochrome; ω(P)≤0.07%, ω(S)≤0.05%. 2: chrome ore or concentrate for refractory materials, ω (SiO2) ≤ 10%, ω (CaO) ≤ 3%, ω (FeO) ≤ 14%. 3: chrome ore or concentrate for chemical industry ω (SiO2) ≤ 8%, ω (A12O3) ≤ 15%. 4: chrome ore for diabase cast stone, ω (Cr2O3) ≥ (10% ~ 20%), ω (SiO2) < 10%. 5: When the total amount is selected from PGE for an associated chromite reaches 10-6 (0.3 ~ 0.4) ×, evaluation should be made. 6: The selection of lean grades is generally twice the grade of tailings. 7: The selection of the minimum mining thickness of the rich ore is 0.5m for the single ore layer and 0.3m for each layer of the complex ore layer. Construction nails,Galvanized iron nails,Iron nail suppliers,Iron nails wholesale,Custom size iron nails Anping Honglin Wire Mesh Co.,Ltd , https://www.honglingwirenetting.com project Deposit and ore type Endogenous deposit Rich mine Lean mine ω(Cr2O3) Boundary grade ≥25 ≥5~8 The lowest industrial grade ≥32 ≥12 The lowest available thickness m 0.3~0.5 1.0 Stone removal thickness m 0.5 1.0