技术详细介绍
项目简介：
This invention relates to the storage of titanium metal sponge, and more particularly to the storage of such sponge containing magnesium chloride as an impurity. Titanium metal sponge is commonly produced by re action of titanium tetrachloride and metallic magnesium according to the so-called Kroll process. The product is a spongy porous mass, which may be in various states of subdivision, and inevitably contains some magnesium chloride as a by-product impurity which is substantially impossible to remove completely by commonly practiced techniques. In the presence of moisture, even that present in relatively dry air, magnesium chloride, which is hygroscopic, forms a hydrated compound. When sponge containing such hydrated magnesium chloride is heated as in melting to form ingots, the hydrated magnesium chloride does not release all its added water but may in part decompose to form HCl and magnesium hydroxychloride or some other magnesium-oxy compound. A standard steel drum of 55 gallons capacity was filled to within about an inch of the top with 450 pounds of titanium metal sponge granules containing 0,15 % MgCl2 and having a Brinell hardness number of 168. A porous paper bag containing 2,5 pounds of anhydrous aluminum chloride was placed on top of the sponge, and the cover, which was provided with a rubber gasket, was placed on the drum and clamped tight. After four, months storage the drum was opened and hardness determination on the sponge showed a Brinell hardness number of 166, which was about the same as before storage.
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