A control method for green environmental protection smelting of converter

Abstract

The invention relates to a method of controlling green environment-friendly smelting of a converter. The method concretely comprises the following steps of (1) performing double-slag operation when Si+ Ti is not less than 0.7%; (2) performing converter rocking for more than two times altogether after the double-slag operation is ended, wherein the converter rocking angle is 30 degrees to -30 degrees, and performing lance sinking for oxygen blowing after waiting for 1 min to 2 min at a zero position; (3) manually adjusting an oxygen pressure valve to 30% to 35% during secondary lance sinking,wherein oxygen flow is 35000 m<3> / h to 38000 m<3> / h, and the lance height is 3.0 m to 3.2 m; (4) performing oxygen blowing for 30 s to 40 s, and after the flow is stabilized, manually adjusting the pressure valve to return to 85% to 88% of the initial state, and adjusting the oxygen flow to 51000 m<3> / h to 53000 m<3> / h; and (5) pressing slag by using a slag pressing material at the early stage andintermediate stage of blowing, wherein the addition amount of the slag pressing material is 200 to 300 kg per batch; and at the later stage of blowing, only allowing to add an iron-contained material, wherein the addition amount of the iron-contained material is not greater than 300 kg per batch. According to the method disclosed by the invention, through technology optimization, metal splashingliable to occur during secondary lance sinking is effectively controlled; the phenomenon that smoke dust overflows to cause pollution during secondary lance sinking is eliminated; stable control oversmelting of the converter is realized; environmental pollution is reduced; and meanwhile, the metal charge consumption is reduced.

Description

technical field [0001] The invention relates to a converter smelting process, in particular to a control method for green and environment-friendly smelting of a converter. Background technique [0002] The pollution problem in the production process of iron and steel enterprises has attracted much attention. Wet dust removal is affected by the unstable content of Si and Ti in molten iron. It is easy to cause smoke and dust to overflow, and the smoke pollutants formed will put a huge pressure on the environmental protection of enterprises. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a control method for green and environment-friendly smelting of the converter, which eliminates the phenomenon of smoke and dust overflow pollution from the second shot, and realizes the stable control of the smelting of the converter. [0004] To achieve the above object, the present invention adopts the following technical solut...

AI Technical Summary

Problems solved by technology

[0002] The pollution problem in the production process of iron and steel enterprises has attracted much attention. Wet dust removal is affected by the unstable content of Si and Ti in molten iron. It is easy to cause smoke and dust to overflow, and the smoke pollutants formed will put a huge pressure on the environmental protection of enterprises