System for intelligently optimizing IF steel top slag and optimization method

Abstract

The invention relates to a system for intelligently optimizing IF steel top slag, which comprises a material weighing system, a material adding system and a process control system, wherein the material weighing system includes a storage bin, a storage bin switch, a weighing hopper and a weighing hopper switch; the material adding system includes a conveyor belt and a rotary chute; the process control system includes a computer, a weighing hopper PLC and a storage bin switch PLC, a weighing hopper switch PLC, a conveyor belt PLC, a rotary chute PLC and a signal feedback PLC which are electrically connected with the computer; and the signal feedback PLC is connected with the weighing hopper PLC and a converter production control system at the same time. The invention further provides a method for intelligently optimizing the IF steel top slag by adopting the system, which can realize automatic calculation for lime and aluminum slag for IF steel top slag modification and automatic addingof a top slag modifier, thereby reducing the manual labor intensity, shortening the detection time, improving the modification accuracy, and ensuring efficient and stable production of the converter.

Description

technical field [0001] The invention relates to a system and an optimization method for intelligently optimizing IF steel top slag, belonging to the technical field of converter smelting control. technical background [0002] At present, the production of IF steel mainly adopts the "BOF-RH-CC" (top-bottom combined blown furnace-RH vacuum refining-slab continuous casting) process. Since it does not go through LF refining, reducing white slag cannot be produced, so that after the end of RH , the ladle top slag is still an oxidative slag, and the oxygen in FeO in the slag will transfer to the steel and react with [Al] in the steel to form Al 2 o 3 Inclusions and pollute molten steel; for this reason, in the smelting process of IF steel, it is necessary to modify the top slag of IF steel; there are two commonly used methods for modifying the top slag of IF steel: namely: one-step method and two-step method, and one-step method Mainly after the converter is tapped and before th...

AI Technical Summary

Problems solved by technology

[0002] At present, the production of IF steel mainly adopts the "BOF-RH-CC" (top-bottom combined blown furnace-RH vacuum refining-slab continuous casting) process. Since it does not go through LF refining, reducing white slag cannot be produced, so that after the end of RH , the ladle top slag is still an oxidative slag, and the oxygen in FeO in the slag will transfer to the steel and react with [Al] in the steel to form Al 2 o 3 Inclusions and pollute molten steel; for this reason, in the smelting process of IF steel, it is necessary to modify the top slag of IF steel; there are two commonly used methods for modifying the top slag of IF steel: namely: one-step method and two-step method, and one-step method Mainly after the converter is tapped and before the RH refining process, enough modifiers are directly added to the ladle to modify the top slag at one time. The premise of the accurate implementation of this method is that manual sampling is first required to measure the final slag of the converter. The precise addition of the modifier can only be determined by the composition of the modifier, which leads to a lot of time delay in the actual operation, and the labor intensity of the on-site operators is relatively high. At the same time, it is also dangerous and easy to cause personal injury; the two-step method is mainly At the end of converter tapping and before RH refining treatment, part of the modifier is added to the ladle to pre-reform the top slag, and then the top slag is modified twice during the RH refining process or after RH refining. The method is mainly based on experience, adding part of the modifier after the converter is tapped to pre-reform the top slag after the converter is tapped, then manually sampling after RH refining, and adding an appropriate amount of The top slag modifier is used to modify the top slag; although this method saves the sampling time of the final slag of the converter, manual sampling is still required in the RH process to detect the composition of the top slag, and then accurately determine the amount of modifier added

It can be seen that no matter which method requires manual sampling and detection of the composition of the slag, the addition of the top slag modifier is determined according to the composition of the slag, which will increase the labor intensity and prolong the smelting cycle

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