METHOD AND SYSTEM FOR SUPPLYING REDUCING AGENT FOR ROTARY KILN

摘要

In a large rotary kiln directly reducing materials containing metal oxides a major part of solid carbonaceous reducing agent is fed through the charge feed end and the remainder is formed into a mixture of particle sizes, divided into two streams, and directed through the kiln discharge end into at least one upper quadrant and against the kiln wall for depositing the particles on the surface of the charge bed. The stream flows are adjusted so that one deposits on the bed over at least 50% of kiln length from the discharge end and the second deposits primarily on the bed over regions requiring the greatest heat-transfer rates. The streams are produced by blowing the particles with low pressure air.