Table 1 General industrial indicators for salt lakes and salt minerals Metering component mineral Mining method Industrial indicators Water soluble series is harmful Maximum allowable content of components Boundary grade % Minimum work Industry grade% Minimum recoverable thickness m Stone removal thickness m NaCl Stone salt brine ≥5 ≥10 10 Salt (×10 6 ): Ω(βa)≤15, Ω(F)≤5, Ω(Pb)≤1, ω(As)≤0.5 solid ≥30 ≥50 ≥15 ≥30 2 to 20 2 ≥30 ≥50 0.3 to 0.5 0.3 to 0.6 KCl Potassium salt brine ≥0.3～0.5 ≥0.5～1 ω(Ca)≤0.5% ω(Mg)≤0.3% ω(SO 4 )≤2.5% ω(NaCl)≤5% solid Pit mining ≥5 ≥8～10 0.5 0.5 Open pit mining ≥3 ≥8 0.3 to 0.5 0.5 ω(Fe)≤0.04% ω(Ca)≤1.5% ω(Mg)≤0.5% ω(Cl)≤1.5% Na 2 SO 4 Glauber's salt , anhydrous thenardite brine ≥3 ≥5 10 solid Drilling water soluble ≥30 ≥45 Open pit mining ≥30 ≥45 0.1 to 0.3 0.2 to 0.6 Glauber solid Pit mining ≥10～15 ≥15～20 1 to 2 1 Open pit mining ≥8 ≥20 0.1 to 0.3 0.2 to 0.6 Ω(Fe)≤0.02% ω(NaCl)≤1.2% ω(Na 2 SO 4 )≤0.1% White sodium vanadium solid Open pit mining ≥25 ≥35 0.5 to 0.1 0.2 to 0.6 Na 2 CO 3 +NaHCO 3 Petrone brine ≥2 ≥3.5 10 solid Drilling water soluble ≥17 ≥25 0.1 0.5 Pit mining ≥17 ≥25 0.7 0.02 Open pit mining ≥20 ≥25 0.6 0.1 MgCl 2 Magnesium salt brine ≥2 ≥5 Ω(Ba)≤0.001% Ω(As)≤0.002% ω(Pb)≤0.001% ω(SO 4 )≤0.01% solid Open pit mining ≥10 ≥20 0.5 0.5 B 2 O 5 boron brine 400mg/l 1000mg/l Ω(Fe)≤0.02% solid Open pit mining ≥1.5 ≥2 0.3 0.6 LiCl Lithium mine brine 150mg/l 300mg/l Li 2 O Lithium mine solid Open pit mining ≥0.06 ≥0.2 0.5 0.5 MgO Water magnesite solid Open pit mining ≥33 ≥34.5 1.0 1.0 NaNO 3 Sodium saltpeter solid Open pit mining ≥2 ≥5 Note 1: The salt lake brine is irregular and the minimum thickness can be harvested; 2: The industrial index of salt lake solid mineral suitable for open-air water-soluble mining can be appropriately reduced; 3: Drilling water-soluble mining, due to different ore quality, water-soluble energy and mining methods, the available thickness The requirements for removing the thickness of the stone are very different, and each mining area can be determined according to the above factors; 4: K2SO4 and MgSO4 industrial indicators can be converted into KCl and MgCl2 indicators, and the conversion factors are 1.1687 and 1.2642 respectively; 5: various industrial indicators are It can be adjusted according to the results of the ore processing test. A variety of salt minerals (companion), and can be comprehensively utilized, their industrial indicators can be appropriately reduced Table 2 Comprehensive evaluation indicators for salt lakes and salt minerals Component KCl MgCl 2 NaCl LiCl Li 2 O Na 2 SO 4 B 2 O 3 Na 2 CO 3 Br - Rb 2 O Cs 2 O I - content solid 1% 5% 20% 0.06% 8% to 20% 0.2% to 0.5% 10% to 15% 0.02% 0.01% 0.005~0.1mg/l brine 0.2% 1% 5% 15 mg/l 3% 400 mg/l 1.5% 50～60mg/l 50mg/l 20～30 mg/l 15～20 mg/l HEBEI DONGDING CHEMICAL TRADE CO.,LTD , https://www.hebeiopct.com