method and device for melting of metals in the kokslos powered cupola.

摘要

PCT No. PCT/DE90/00344 Sec. 371 Date Jan. 16, 1991 Sec. 102(e) Date Jan. 16, 1991 PCT Filed May 11, 1990 PCT Pub. No. WO90/14568 PCT Pub. Date Nov. 29, 1990.The improved method of melting a metal, especially cast iron, in a cokeless cupola furnace includes the step of injecting at least one case product quality improving and stabilizing substance into a space between the grate and the burners. The quality improving and stabilizing substance can be refining substance and a nuclear-enriching substance of the type used in code-fired cupola furnaces including nitrogen-containing substances such as ammonia and hydrazine and halogen-containing substances. A suitable apparatus for performing the improved process is also described having a downwardly direct lance for injection of the quality improving and stabilizing substance with an upwardly-directed mouth portion for forming an upwardly directed jet inserted through a furnace wall in a throughgoing guideway.