Calcium lumps (50x160mm)
Calcium turnings (5mm thick x 16mm W x 100mm L)
Calcium granules (0-2mm or 2-7mm)
In broad terms Calcium production may be divided into two types – Electrolytic and Aluminothermic.
The latter naturally has higher levels of Aluminium and is more conducive to uses where Aluminium is not a deleterious element. Most of our trade is conducted in electrolytic grades of granules, turnings and lumps from Russia. Customers include the lead industry where Ca is used for deoxidising and the Magnesium industry where it is used in master alloys.
China possesses electrolytic production dating from the 1960s Sino-Soviet Pact. Some of these plants have been the last to be privatised due to the fact that Calcium is often used in the nuclear arena and thus Calcium production has remained under government control. Calcium is classed as hazardous for transport and good attention should be paid to packing.
A typical grade of good quality electrolytic calcium metal would be – Ca 99% min, Al – 0.08%, Cu – 0.01% max, Mg – 0.08% max, Fe – 0.01% max, Mn – 0.015% max, N – 0.05% max, Sr – 0.2% max.
Calcium was first isolated in its metallic form by Sir Humphrey Davy in 1808 through the electrolysis of a mixture of calcium oxide and mercury oxide.