| 摘要 |
<p>PURPOSE:To shorten the time for starting without the possibility of electrode breakage by charging residual slag, product scrap and energizing materials near the front ends of the electrodes in an electric furnace kept at ordinary temp., then charging raw materials near to the state of a choke feed and turning on a power source. CONSTITUTION:Raw materials 13 are freshly charged into the electric furnace 10 which is a submerged arc furnace for smelting ferroalloys by using the self- calcining electrodes 1 and is kept at ordinary temp. The electric furnace 10 is then started by turning on the power source. The residual slag 12, the product scrap 11 of the ferroalloys and the energizing materials, such as carbonaceous materials 9, are charged near to the front ends of the electrodes 1 at this time. The raw materials 13 including chromium ore, reducing agents, such as coke, fluxing agents, such as limestone, etc., are charged from a raw material chute 2 to the state of the choke feed. The power source is thereafter turned on. The electrode breakage by a heat shock is prevented in this way and the starting time is shortened; in addition, the economical recovery of the gases produced in the furnace is possible and the improved productivity of the electric furnace 10 is attained.</p> |
