Apparatus cowper provided with a double envelope hollow for blast furnaces

摘要

Apparatus combustion, in particular for blast furnaces, comprising a refractory lining and a toroidal formed by the shells and mutually welded completed at least in part in the form of a hollow envelope. / p & & p & the double envelope is formed by applying, with insertion of the spacing pieces 15 has 40mm of thickness, a second outer envelope 5 on the envelope 1 surrounding the refractory lining and filling the gap 6 between the two envelopes 1, 5 of a material dried and fluid is based on sic and graphite having a particle size can range up to 8mm and thermal conductivity of at least 1,5wmk.