Titanium sponge

Titanium sponge refining process【Reduction/Vacuum separation process】

In the manufacturing process for titanium sponge, pure titanium tetrachloride is reacted in a stainless steel reactor with magnesium metal heated to 900℃. The titanium tetrachloride is reduced by the magnesium to produce the sponge. Magnesium chloride is extracted at regular intervals during the reaction by the application of pressure. After the reaction has completed, the magnesium chloride and magnesium included in the lump of titanium sponge are eliminated by high temperature vacuum extraction (vacuum separation process), to leave the titanium sponge.

Electrolysis of magnesium chloride【Electrolysis process】

The magnesium chloride extracted during the reaction is subjected to electrolysis to decompose into chlorine and magnesium. The chlorine is returned to the chlorination and distillation process, and the magnesium is returned to the reduction and vacuum separation process for re-use.

Chemical reactions

Reduction/vacuum separation process

TiCl₄＋2Mg＝Ti＋2MgCl₂　（reduction）

Electrolysis process

MgCl₂→Mg＋Cl₂　（electrolysis）

Crushing the titanium sponge【Crushing, sizing and packing process】

After reduction and separation, the titanium sponge is crushed by first shearing into large lumps and then into smaller pieces using shears and crushers. Levels of minor components differ from piece to piece, so the pieces are mixed together in a blender to produce a uniform quality, then distributed evenly into drum cans using a splitter. After the titanium sponge has been adjusted into the required particle size and quality, it passes through strict quality control checks before shipment.

Crushing process

Titanium sponge properties and main uses

One of the features of our titanium sponge products is that the supply is very stable and reliable. Shipments include a variety of high quality titanium sponge products manufactured by Kroll process and subject to strict quality control to meet customers' needs. These products are utilized by the aerospace industry for uses including crucial engine parts, by general industry, mainly for uses such as plate heat exchangers, and also as an additive in manufacturing special stainless steels. The titanium sponge used for crucial engine parts in particular is called a premium grade, and is manufactured under extremely strict quality control.

Quality

Product	Code	JIS	Ti (%min）	Other contaminants									Hardness (BHN）
				Fe	Cl	Mn	Mg	Si	N	C	H	O
Soft Sponge	S-90		99.8	0.03	0.08	0.002	0.04	0.02	0.006	0.01	0.003	0.05	90max
	S-95		99.7	0.04	0.08	0.002	0.04	0.02	0.006	0.01	0.003	0.06	95max
Mild Sponge	M-100	JIS1	99.6	008	0.10	0.005	0.05	0.02	0.010	0.02	0.004	0.07	100max
	M-120	JIS2	99.5	0.12	0.12	0.010	0.06	0.03	0.015	0.02	0.005	0.10	120max

Physical properties

Boiling point	Melting point	Specific gravity
3260℃	1668℃	4.50（20℃）