Magnesium chloride (MgCl2) can be used as a Mg-source for phosphate- and ammonium removal in waste water (i.e. manure, municipal water treatment, waste water treatments of food processing industry). Phosphate can be precipitated by producing magnesium-ammonium-phosphate (struvite). In stead of MgCl2, Mg(OH)2 can also be used.

Magnesium chloride can also be used in combination with Ca(OH)2 in non sulfate containing waste streams. By adding MgCl2 and Ca(OH)2, Mg(OH)2 is formed in-situ, whereby contaminants (metals or organics) coprecipitate. In this way, process water can be re-used.

Application:

1.metallurgy: used to make refractory material and is raw material of making number 2 flux and smelting magnesium.

2.chemicalused to make all kinds magnesium salt such as magnesium oxide, magnesium hydroxide, magnesium carbonate, cracker kindling and raw material of antifreeze.

3.construction materialwith MgO they can be made into hard corrasion resistance magnesia cement, artificial marble, floor, ceiling, decorative board, fireproof board, partition board, Magnesite well lid, bathtub, door and window frame and mobile home..

4.machineIn daily life, magnesite and it can be made into machine pakcing chest, triangle cushion and furniture etc.

5.foodBean curd made from solution of magnesium chloride is more tender and delicious. Also it can act as some food's additive.

6.communicationas snow thawing agent in road. Quicker ice melting speed, small vehicle corrasion.

7.medicineMagnesium chloride can be made into Lugan as a kind of medicine.

8.agricultureUsed to make magnesium fertilizer, potassium magnesium fertilizer and cotton defoliant.