Model for the decomposition of carnallite in aqueous solution

The role of Mg value and moisture content of decomposed products during the decomposition process of carnallite in aqueous solution: a novel monitoring method

“…6 A source of KCl is the carnallite double salt, which has the composition KCl$MgCl 2 $6H 2 O or KMgCl 3 $6H 2 O, and is either obtained as the ore or recovered from brine that favors carnallite. [7][8][9] Carnallite is treated with fresh water to dissolve MgCl 2 and keep KCl in the crystalline state. Then, KCl otation from the mixed salts is carried out using an amine as the collector.…”

“…Therefore, the amount of water is a crucial factor for the decomposition of carnallite in an aqueous solution. 7 Some studies have investigated the process of the decomposition of carnallite in an aqueous solution. 7,[9][10][11][12][13][14][15][16] When the carnallite is decomposed by adding appropriate fresh water, MgCl 2 goes into the solution, and then KCl crystallizes.…”

“…7 Some studies have investigated the process of the decomposition of carnallite in an aqueous solution. 7,[9][10][11][12][13][14][15][16] When the carnallite is decomposed by adding appropriate fresh water, MgCl 2 goes into the solution, and then KCl crystallizes. The process occurs in a suspension and can be represented as…”

“…In this study, we attempted to establish the relationship between the Mg value and moisture content of DPs, due to the Mg concentration and H 2 O content of E(L) or F(L) having a specic value at a desired temperature. 7 The objectives were to investigation the decomposition process of carnallite with different water conditions through dissolving experiments and the feasibility of monitoring the decomposition process of carnallite in an aqueous solution through a strategy of Mg value and the moisture content of the DPs.…”

Improvement of sylvite flotation from halite by starvation feeding the collector octadecylamine

“…The quality of sylvite concentrate can be improved by controlling the decomposition process of carnallite, based on the quaternary diagram of the NaCl–KCl–MgCl 2 –H 2 O system. 6,7 However, the decomposition process of carnallite is hard to control, because it is influenced easily by many factors such as temperature and the amount of mother liquor (K + saturated but Mg 2+ unsaturated solution). Wang et al 8 showed that the grade of sylvite concentrate in Qinghai Avic Resources Company was improved by a combination process of de-brining and washing to remove the magnesium chloride and halite particles in sylvite concentrate.…”