GAS-BURNING AND ELECTRIC-ARC DUAL-HEATING HIGH-EFFICIENCY SILICON REFINING FURNACE AND HEATING METHOD THEREOF

摘要

Provided are a gas-burning and electric-arc dual-heating high-efficiency silicon refining furnace and heating method thereof. Disposed within a furnace body are two heating chambers, a first heating chamber being inside of the heat-conducting internal furnace, and a second heating chamber between the heat-conducting internal furnace and a heat insulation sleeve. The first heating chamber uses electrode heating, and the second heating chamber uses fuel-burning heating. Heat guide holes are evenly provided on the wall of the heat-conducting internal furnace. The first heating chamber communicates with the second heating chamber through the heat guide holes. First, fuel is burnt to heat up the second heating chamber, and the electrode does not operate. The heat of the second heating chamber flows into the first heating chamber through the heat guide holes. When the temperature of the first heating chamber reaches a pre-set value, the electrode starts to heat the first heating chamber. The temperature of the first heating chamber continuously increases. After the temperature reaches a pre-set value, a cycle of a thermal chemical reaction ends, the burning in the second heating chamber is reduced to maintain the temperature. Material is discharged.