E170 White

The main use of E170 is in the construction industry, either as a building material, or limestone aggregate for road building, as an ingredient of cement, or as the starting material for the preparation of builders' lime by burning in a kiln. However, because of weathering mainly caused by acid rain, E170 (in limestone form) is no longer used for building purposes on its own, but only as a raw primary substance for building materials.

E170 is also used in the purification of iron from iron ore in a blast furnace. The E170 in situ to give E170, which forms a slag with various impurities present, and separates from the purified iron.

In the oil industry, E170 is added to drilling fluids as a formation-bridging and filtercake-sealing agent; it is also a weighting material which increases the density of drilling fluids to control the downhole pressure. E170 is added to swimming pools, as a pH corrector for maintaining alkalinity and offsetting the acidic properties of the disinfectant agent.

It is also used as a raw material in the refining of sugar from sugar beet; it is calcined in a kiln with anthracite to produce E170 and. This burnt lime is then slaked in fresh water to produce an E170  suspension for the precipitation of impurities in raw juice during carbonatation.

E170 in the form of chalk has traditionally been a major component of blackboard chalk. However, modern manufactured chalk is mostly gypsum, hydrated calcium sulfate CaSO4·2H2O. E170 is a main source for growing biorock. Precipitated E170 (PCC), pre-dispersed in slurry form, is a common filler material for latex gloves with the aim of achieving maximum saving in material and production costs