Production technology and method of titanium sponge

Method the sponge metal titanium produced metal thermal reduction. % purity (quality) is generally 99.1 ~ 99.7. Impurity elements% (quality) a total of 0.3 ~ 0.9, impurity elements oxygen% (mass) of 0.06 ~ 0.20, hardness (HB) ranged from 100 to 157, according to the different purity of WHTiO to MHTi4 five grades. As the main raw material for the preparation of industrial titanium alloys. Sponge titanium production is the basic link of titanium industry, it is titanium, titanium powder and other raw materials of titanium sponge  The ilmenite becomes four titanium sponge, then put in a sealed stainless steel tank, filled with argon, making them react with the magnesium metal, get "titanium sponge". The porous, "sponge titanium" is not used directly, also must put them in an electric furnace melting into a liquid, in order to cast titanium alloy plates  Molten salt chlorination process is developed in the former Soviet Union in twentieth Century 60, method for production of four titanium sponge, the raw material characteristics of this method is applicable not only to the former Soviet Union (titanium slag containing CaO+MgO about 6%), the furnace production capacity of 20 t/m2 ~25 t/m2 four titanium chloride, molten salt section area of 6m2. Large molten salt Nissan four Titanium alloy sheet chloride was 120 t~150 T, formerly the rectangular furnace, the furnace for the round, round molten salt chlorination furnace size of Φ 5 m × 8.5 m, inner diameter is 2.76 m, the rectangle is 4.5 m × 3.5 m × 8.5 M. No dead angle circular furnace, furnace body strength increase, 3 years 1 times than the rectangular furnace overhaul, nearly 1 times the service life extension. Molten salt chlorination can use a variety of rich titanium material, in addition to titanium slag containing calcium magnesium, is now widely used by red ilmenite (Fe2O3 3TiO2) Ti slag smelting (TiO2 87%~91%), can also use the rutile.

The nature of titanium sponge, packaging and storage

Titanium is a corrosion-resistant metal, but absolutely no oxidation, no corrosive substance is not there. Titanium oxide does not, particularly at high temperatures, easily combines with oxygen, but it is very dense oxide, oxygen can be prevented from further erosion. Titanium sponge is a loose porous sponge-like, large surface area, more lively. The larger the surface area, the contact surface with the air, the higher the activity, easy and gas, water reacts easily oxidized. The titanium oxide is an impurity element, oxygen content exceeded, you can not use titanium sponge, can only be scrapped. Fine powders of titanium sponge in the heat, may cause a fire in case of fire or contact with oxidants time, also can burn in carbon dioxide or nitrogen. Only argon and helium burning titanium powder can only be controlled, according to the combustion science we know, in the processing and handling of metal powders, usually produce a dust cloud, the cloud of dust mixed with air if the right proportion, reaching the limits of explosion inside, outside in case of fire, sparking, static fire can ignite the metal dust. Titanium sponge packaging: titanium sponge per barrel (piece) net weight 70kg ~ 250kg packing, galvanized iron drums, barrels lined with PVC film bag with Uncovery sealed lid junction with the barrel body should there can identify the identity of the packaging is intact. Generally are now 200kg barrel. After the product packaging, drums evacuated, filled with argon. Products should be stored in dry warehouse, shall open dumps or with acid, alkali and other corrosive materials mix. Product transportation should be handled with care to prevent moisture and seals collision damage. Based on the information available, titanium sponge is still no long-term storage experience. Depending on the nature of the experience of titanium sponge and titanium processing of various titanium plate must pick with storage period no longer than one year. We reserve system was stored over titanium sponge. In the 1970s, because of our lack of understanding of the nature of titanium sponge, had received a number of titanium sponge, a bucket was 100kg, large grain size are more now. This batch of titanium sponge receives less than six months, some experts pointed out that, not long-term storage of titanium sponge, titanium sponge National Bureau soon the library, from the factory for the titanium ingot processing and storage, the storage period before and after less than a year. So far as we, the long-term storage of titanium sponge is also inexperienced.

The development of scene of titanium sponge

In the production process of titanium to toxic chemical medium chlorine (chemical weapons in World War II oh) and noble metal magnesium, and the reaction process requires a lot of energy, which is why titanium expensive. The smelting process oftitanium is not to be used for production, because it is porous shape, resembling asponge, called titanium sponge, titanium alloy pump will be placed in vacuum consumable electrode arc furnace smelting titanium ingots, plates, rods, tubes and for other formsof titanium production. Titanium is rich in resources, mineral resources are relatively concentrated, converted into TiO2 total reserves of 90 million tons, is the first in the world. The main distribution of titanium ore, the reserves accounted for 35% of the world's total reserves. However, compared with the world's major mineral producing area, natural Jin Hongshi (TiO2) less resources, easy exploitation of placer less.Titanium, titanium iron ore more symbiotic, smelting high initial cost. Here also need to refer to a story, the original iron and steel smelting steel slag after stacked in a cornerfor a long time to climb, we did not find this kind of slag inside unexpectedly containprecious metal titanium. Later proposed to buy our slag, concrete truth that make our national attention on the Panzhihua Iron and steel slag, of course rejected japan.

titanium sponge industry started in twentieth Century 1954 50 years, non-ferrous metalbegan to research on the preparation of sponge titanium, titanium metal as thestrategy on the 12 year development plan, in 1958 in the industrial test of spongetitanium, founded the first titanium sponge production workshop, at the same time,non-ferrous metal processing plant was established the first titanium processing material trial production workshop. Before and after 1980, the titanium spongeproduction reached 2800 tons, but because most of them were lack of knowledge on the titanium, titanium pumps high prices also limit the application of titanium, titanium processing material production is only 200 tons, titanium industry in trouble.