Process for preparing K fertilizer (K salt) from K-enriched rock and lime by hydrothermal method
A technology of potassium-rich rock and gypsum water, applied in the directions of potash fertilizers, chemical instruments and methods, inorganic fertilizers, etc., can solve problems such as no report on details, and achieve the effects of reduced production cost, low energy consumption, and convenient operation.
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[0037] raw material
[0038] Potassium-rich rock: collected from Nanshan, Miyun County, Beijing, its chemical composition (%):
[0039] SiO 2 TiO 2 al 2 o 3 (Fe 2 o 3 +FeO) MnO 2 CaO MgO K 2 O Na 2 OP 2 o 5 Loss on ignition Total
[0040] 63.09 0.71 15.69 4.41 0.02 0.15 0.37 12.79 0.22 0.04 1.93 99.42
[0041] X-ray powder crystal diffraction analysis indicates that the mineral composition of the potassium-rich rock is mainly potassium feldspar, and the others are quartz.
[0042] Lime: CaO content 97%, purchased from the market.
[0043] Gypsum: purchased from the market.
[0044] (1) Put 5.000g of potassium-rich rock coarse powder, 4.000g of lime coarse powder, and 1.000g of hemihydrate gypsum powder into an agate mortar, add about 10ml of water, and grind thoroughly so that the particle size of the material reaches below 200 mesh, and mix evenly , then transfer the material to a plastic container, and then add some water to make solid: liquid: = 1: 1...
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