Electric furnace burden process with high efficiency and low cost

Abstract

The invention relates to an electric furnace burden process with high efficiency and low cost. Main raw materials are molten iron accounting for 30-60 percent of metal adding amount, excellent scrap steel accounting for 5-10 percent of metal adding amount and low-lost scrap steel accounting for 30-35 percent of metal adding amount; auxiliary materials are lime and soft burning dolomite, wherein 3.0-3.5 percent of lime and 1.0-1.5 percent of soft burning dolomite are respectively added in each ton of molten steel; and through optimizing electric furnace slag discharge operation, using an oxygenlance and adopting power supply oxygen blowing control and other smelting processes, the electric furnace burden process greatly improves simultaneous hit rate of terminal point components and the temperature of an electric arc furnace, realizes the aims of improving the quality of the molten steel, shortening the smelting period and reducing the consumption and significantly reduces the full oxygen content of steel products at the same time. The electric furnace burden process has good application prospect for ensuring the quality of steel and reducing the production cost.

Description

Technical field: [0001] The invention belongs to the field of iron and steel smelting, and mainly relates to an electric furnace charge technology. technical background: [0002] "Scrap + hot metal" is the electric furnace batching method commonly used in most steel mills. The disadvantages of this batching method are: if the amount of molten iron added is too small, the amount of carbon used for oxidation is low, and the chemical heat generated by the C-O reaction less, it is not conducive to rapid melting of scrap steel and heating of the molten pool, and it is also difficult to reduce the content of residual elements; if the amount of molten iron is too large, the amount of carbon will be high, and the easily oxidized elements silicon and manganese will also be high, which is often affected by selective oxidation. The smelt has high carbon content and high phosphorus content, resulting in decarburization and dephosphorization due to power outages; after smelting, the slag...

AI Technical Summary

Problems solved by technology

[0002] "Scrap steel + hot metal" is the electric furnace batching method commonly used by most steel mills. The disadvantages of this batching method are: if the amount of molten iron added is too small, the amount of carbon used for oxidation is low, and the chemical heat generated by the C-O reaction Less, it is not conducive to rapid melting of scrap steel and heating of the molten pool, and it is also difficult to reduce the content of residual elements; if the amount of molten iron is too large, the amount of carbon will be high, and the easily oxidized elements silicon and manganese will also be high, which is often affected by selective oxidation. The smelt has high carbon content and high phosphorus content, resulting in decarburization and dephosphorization due to power outages. Cause the furnace edge to rise, the furnace cover is difficult to rotate, etc.

Simultaneous oxidation and reduction in the electric furnace, high power consumption, long smelting cycle, high quality requirements for molten iron and steel materials, molten iron must be dephosphorized, steel materials are stainless steel scrap and carbon steel scrap, high cost

Images