98/04112 Boron-containing polysilycarbodiimides: a new class of molecular precursors for Si-B-C-N ceramics

• Publisher: Elsevier Science
• Year: 1998
• Weight: 195 KB
• Volume: 39
• Category: Article
• ISSN: 0140-6701
• DOI: 10.1016/s0140-6701(98)94107-8

✦ Synopsis

An annular chamber provided with local ore feed and discharge as well as peripheral burners and a gas-transfer system is included in the rotaryhearth furnace for ore treatment.

The CO-rich atmosphere from coal combustion is applied for the reduction of the ore and recirculated in the furnace for secondary combustion with heat recovery and decreased pollution in discharge.

98/04111

Smelting process with direct reduction of iron ore for manufacture of cast iron melt in two-chamber vertical furnace