Electric furnace smelting stainless steel slagging method

Abstract

The invention relates to an electric furnace smelting stainless steel slagging method, which comprises the following steps sequentially: I electric furnace charging: materials are added into two material baskets in two times, 40+ / -4 of nickel recirculating scrap, 35+ / -4 of nickelic pig iron, 20+ / -2 of high carbon ferrochrome and 10+ / -1 of waste slag are added into the material basket 1, 10+ / -1 of nickel recirculating scrap, 45+ / -4.5 of nickelic pig iron and 15+ / -1.5 of high carbon ferrochrome are added into the material basket 2, and the material basket 1 is firstly charged; II after charging materials in the electrochemical material basket 1 are sent into an electric furnace, a first batch of pressed balls are added, and a second batch of pressed balls and lime are added for second charging; III electric furnace charging; IV electrochemical steel is sent, a third batch of pressed balls and lime are added, a furnace door oxygen lance starts to supply oxygen for fluxing, a fourth batch of pressed balls are added, a fifth batch of pressed balls are added, a sixth batch of pressed balls are added, power is transmitted, and the furnace door oxygen lance stops supplying the oxygen; and VI the power is transmitted to raise the temperature, ferrosilicon is added, and steel is tapped. In the electric furnace smelting stainless steel slagging method disclosed by the invention, stainless steel dedusting pre-reduction pressed balls are utilized to assist producing foamed slag.

Description

technical field [0001] The invention relates to a method for making slag in electric furnace smelting stainless steel. Background technique [0002] The application of foam slag in the production of carbon steel in electric furnace is already a very mature technology, which has a very obvious effect on reducing the power consumption of smelting, shortening the smelting time, and reducing the erosion of electric arc on the furnace wall of electric furnace. However, during the production of stainless steel in the electric furnace, Cr with a high melting point is formed due to the oxidation of chromium. 2 o 3 The impact on the slag condition cannot generate a stable and effective foam slag condition. Because the slag is relatively "dead" and inactive, effective submerged arc cannot be realized, resulting in loss of arc energy, and at the same time, the arc light severely erodes the furnace wall of the electric furnace. Now stainless steel electric furnace foam slag technology...

AI Technical Summary

Problems solved by technology

However, during the production of stainless steel in the electric furnace, Cr with a high melting point is formed due to the oxidation of chromium. 2 o 3 The impact on the slag condition can not generate stable and effective foam slag condition, because the slag is relatively "dead" and inactive, it cannot achieve effective submerged arc, resulting in loss of arc energy, and at the same time, the arc light severely erodes the furnace wall of the electric furnace