T/QHLM 01-2018 Salt Lake Carbonate Lithium

Scope

Scope: This standard specifies the product classification, technical requirements, test methods, inspection rules, and marking, packaging, and transportation requirements for lithium carbonate products from salt lake brine. This standard applies to lithium carbonate produced from lithium-containing salt lake brine using various processes; Main technical content: Explanation of the main provisions of the standard. This standard applies to lithium carbonate produced from lithium-containing salt lake brine using various processes. Its main technical requirements are: on the premise of meeting the index requirements of industrial-grade and battery-grade lithium carbonate in the market, the main lithium carbonate content and some metal element indicators are improved, and the chloride and sulfate indicators in battery-grade lithium carbonate are reduced. (1) Main technical indicators Table 1: Chemical composition indicators Indicators Battery-grade lithium carbonate Industrial-grade lithium carbonate Superior grade Passed grade Lithium carbonate (Li2CO3) ω (%) ≥99.5 99.3 90.0 Sulfate (SO42-) ω (%) ≤0.020 0.030 0.050 Chloride (Cl-) ω (%) ≤0.010 0.030 0.050 Calcium (Ca) ω (%) ≤0.003 0.010 0.020 Magnesium (Mg) ω (%) ≤0.005 0.015 0.020 Boron (B) ω (%) ≤0.010 0.020 0.050 Sodium (Na) ω (%) ≤0.025 0.050 0.080 Potassium (K) ω (%) ≤0.001 0.002 0.004 Iron (Fe) ω (%) ≤0.0005 0.001 0.003 Silicon (Si) ω (%) ≤0.001 0.005 0.080 Copper (Cu) ω (%) ≤0.0001 0.002 0.003 Lead (Pb) ω (%) ≤0.0002 0.002 0.005 Nickel (Ni) ω (%) ≤0.0005 0.002 0.005 Manganese (Mn) ω (%) ≤0.0003 0.002 0.005 Zinc (Zn) ω (%) ≤0.0003 0.002 0.005 Aluminum (Al) ω (%) ≤0.0005 0.002 0.005 Chromium (Cr) ω (%) ≤0.0005 0.002 0.005 1. Main lithium carbonate content The main lithium carbonate content (Li2CO3) in industrial-grade lithium c

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