Technical and economic indicators of salt mines

The technical and economic indicators of sea salt, lake salt and well mineral salt in China are different due to different sources and processing of raw materials, such as production cost, raw material consumption and product quality. According to the "Statistical Annual Report of the Salt Industry in 1995", in terms of product quality, the mine salt is required to contain 99.03% of sodium chloride, the lake salt contains 96.7% of sodium chloride, and the sea salt contains 94.67% of sodium chloride (including the Yangtze River estuary). In the world, the northern sea salt contains 96.06% of sodium chloride and the southern sea salt contains 92.99% of sodium chloride.
Well salt salt:
(1) Artificial brine flotation separation salt production process technical and economic indicators finished salt: containing NaCl ≥ 99.3%; brine consumption: 10.5 ~ 11.0 standard m ³ / t salt; evaporation heat economy: 2.6 ~ 3.0 kg water / kg steam .
(2) Gypsum -type rock salt artificial brine mechanical thermal compression salt production process technical economic indicators salt: containing NaCl ≥ 99.3%; brine consumption: 10.5 standard m ³ / t salt; power consumption: ≤ 170kW • h / t salt; Consumption (including dry steam): 60 ~ 80 kg / t salt.
(3) Glauber's salt rock salt artificial brine freezing method separation salt production technology economic indicators salt: containing NaCl ≥ 99.1%; brine consumption: 12 ~ 14 standard m ³ / t salt; evaporation heat economy: 2.6 ~ 3.0 kg water / Kg steam; Yuanming powder: containing Na ₂ SO ₄ ≥ 99%; Yuan Ming powder power consumption: 450kW • h / t; Yuan Ming powder consumption 1.8 ~ 2.0 t / t.
(4) Glauber's salt type artificial salt brine with halogen back to dissolve, heating salting out separation salt production process technical and economic indicators salt: containing NaCl ≥ 99.1%; brine consumption: 12 ~ 14 standard m ³ / t salt; evaporation heat economy: 2.6 ~ 3.0 kg water / kg steam; intermediate nitrate quality: containing Na ₂ SO ₄ 85% ~ 95%.
(5) Glauber's salt rock salt artificial brine "mother liquor recovery method" denitrification salt process technical and economic indicators salt: containing NaCl ≥ 99.3%; anhydrous sodium sulphate quality: containing Na ₂ SO ₄ ≥ 99%; brine consumption: 4.4 standard m ³ /t salt; by-product anhydrous sodium sulfate: 75 kg / t salt; steam consumption (including anhydrous sodium sulfate): 1.05 t / t salt; power consumption: 22 kW • h / t salt.
(6) Technical and economic indicators of sub-evaporation and salt-making process of underground brines: salt content: containing NaCl≥98.5%; brine consumption: 11.0～12.5 standard m ³ /t salt; salt water volume: 50-60 kg/t salt, useful Chemical raw material recovery rate ≥ 85%; evaporation heat economy: 2.6 ~ 2.8 kg water / kg steam.
(7) Solid raw salt flash recrystallization, salt making process, technical and economic indicators, salt quality: containing NaCl ≥ 99.3%; steam consumption: 0.9 t / t salt.

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