Preparation of carnallite from potassium contained bittern of magnesium sulfate
A magnesium sulfate subtype and carnallite ore technology, applied in potash fertilizers, inorganic fertilizers, fertilization devices, etc., can solve the problems of low potassium chloride content and unfavorable production of potassium chloride, and achieve low water-insoluble content and high production The effect of low cost and small investment
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Embodiment 1
[0031] The original brine is evaporated in the sodium salt pool to precipitate sodium chloride. According to the analysis results of the brine, the solid and liquid will separate when it is close to the saturation of langbeinite. At this time, the brine is 31.8Be' and the brine temperature is 18°C. For the old brine with a temperature of 17°C and 37.8Be', the purpose of adding brine is to eliminate the precipitation of potassium salt minerals in the original brine before the carnallite is saturated. The mixed brine point after adding brine is in the metastable phase diagram of MgSO 4 The line connecting the solid phase point and point E. When the mixed brine evaporates and precipitates sodium chloride and Epsom salt until the carnallite is saturated, the brine point is located at point E of the metastable simplified dry basis diagram, and the CE brine obtained at this time is carnallite saturated brine at point E, 34.4Be' , the brine temperature is 17°C; the brine is mixed in...
Embodiment 2
[0035]Take the original brine with a brine temperature of 15°C and 27.6Be', as shown in Table 1, its phase diagram index point Wo falls into the 15°C metastable phase diagram of kaleinite region, the original brine is injected into the sodium salt pool, and sodium chloride is evaporated and precipitated , the original halogen is evaporated before carnallite is saturated, and potassium salt minerals are precipitated, then at K + Before saturation, the brine is introduced into the Epsom salt pool and mixed with the old brine, and the mixed brine point after the brine is in the metastable phase diagram MgSO 4 On the line connecting point -C, the mixed brine will reach K after evaporating salt + When saturated, the brine point is located at point C in the metastable phase diagram, and this CE brine is potassium halite saturated brine. The mixed brine is evaporated and salted out, which partially eliminates the precipitation of the potassium salt of the original brine before the c...
Embodiment 3
[0038] Other implementation conditions are the same as in Example 1, the weight ratio of the CE halogen and the old halogen is 1:3, the reaction time of the halogen is 18 minutes, the stirring speed is 100 rpm, and the amount of the halogen into the halogen is 580 g / min, and the light is obtained. Halite ore: Kcl / Nacl=5.55; Kcl / MgSO 4 =17.84. The composition of halonite ore is shown in the table.
[0039] mine name
PUM
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