The manufacturing method of magnesium carbonate and calcium chloride using dolomite as raw material

摘要

The present invention to a main component of calcium (Ca) crushing the 21.70% and a magnesium (Mg) 13.19%, carbonate (CO ₃₎ 65.11% of mixed composition as dolomite _{[Dolomite Ca.Mg (CO 3) 2} ] classifying small vocal cords in a firing furnace If it fired at a temperature of 800 ℃ ~ 1100 ℃ decarboxylase (CO ₂ ↑) to Baegun times to create a sign language (CaO.MgO) of calcium hydroxide [Ca (OH) _2] and magnesium hydroxide [Mg (OH) _2] is mixed Baegun (MgCl ₂ and CaCl ₂ hybridization) dissolved in hydrochloric acid, such as dolomite, white spirit, magnesite, brucite, olivine, huntite, serpentine and unreacted white mud residue, addition reaction, and the solid is Mg (OH) ₂ with an aqueous solution of calcium chloride solution (CaCl ₂₎ the physical properties of conversion reaction and solid-liquid separation by filtration dehydration to remove the component, Mg (OH) ₂ is washed with water to improve this material purity preparing a stable, basic magnesium carbonate _{[4MgCO 3 Mg (OH) 2} 4H 2 O] in the carbonation reaction and a column header in the reaction, and The present invention relates to a method for preparing powdered calcium chloride by adjusting the concentration of a filtrate, a calcium chloride solution (CaCl ₂ ), producing a liquid calcium chloride product, and spray-drying it.