Method for determining amount of slagging material and deoxidized alloy added into LF (Low-Frequency) refining furnace by use of reference heat method

A deoxidized alloy and refining furnace technology, applied in the direction of improving process efficiency, can solve the problem of no effective method for content control, achieve the effect of optimizing refining effect, stabilizing the quality of refined molten steel, and promoting standardized operations

Active Publication Date: 2014-06-18
LAIWU STEEL YINSHAN SECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no effective method to control the content of FeO and MnO.

Method used

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  • Method for determining amount of slagging material and deoxidized alloy added into LF (Low-Frequency) refining furnace by use of reference heat method
  • Method for determining amount of slagging material and deoxidized alloy added into LF (Low-Frequency) refining furnace by use of reference heat method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] After the furnace number 2-4479 ladle was transported into the LF refining furnace, the collected data: the steel grade number was SPHC, the dissolved oxygen in the molten steel at the end of the converter smelting was 883ppm, the weight of the molten steel was 130.9 tons, and the amount of Al-Mn ferro-manganese added during the tapping process of the converter was 400kg , Almanganese ferroalloy contains 55% aluminum, after calculating F=400*55%-130.9*883*1.125*0.001: the remaining aluminum content is 90.0kg after removing the dissolved oxygen in the molten steel during the tapping process.

[0066] Measure the dissolved oxygen content 8 (ppm) and the mass percentage of acid-soluble aluminum 0.005 (%) in LF incoming molten steel by using the oxygen-fixed probe. After calling the database, find the furnace number 3-3683 and furnace number 3-8311 2 heats of molten steel are used as reference heats, the dissolved oxygen (ppm) in the molten steel at the end of the converter ...

Embodiment 2

[0071] After the furnace number 3-8218 ladle was transported into the LF refining furnace, the collected data: the steel grade number is SPHC, the dissolved oxygen in the molten steel at the end of the converter smelting is 528ppm, the molten steel weighs 133.6 tons, and the amount of Al-Mn ferro-manganese added during the tapping process of the converter is 450kg , Almanganese ferromanganese contains 55% aluminum, calculated (450*55%-133.6*528*1.125*0.001): the remaining aluminum content after removing dissolved oxygen in molten steel during tapping process is 168.1kg; Measure the dissolved oxygen content of 10ppm and the mass percentage of acid-soluble aluminum of 0.005 (%) in LF's inbound molten steel. After calling the database, find 2 heats of steel with furnace number 3-8328 and furnace number 3-8327 as reference furnaces , dissolved oxygen in molten steel at the end of converter smelting of these two heats (ppm), remaining aluminum content after removing dissolved oxygen...

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Abstract

The invention relates to a method for determining the amount of a slagging material and deoxidized alloy added into an LF refining furnace by use of a reference heat method. The method comprises the following steps: controlling the amount of slags discharged from a rotary furnace during a refining process, wherein the amount of the added synthetic slags is the same during a steel discharging process of the rotary furnace according to the same type of steel heat number; (1) acquiring data and building a database by use of a computer; and (2) using the database for determining the amount of the slagging material and the deoxidized alloy added into this type of steel LF refining furnace when the acquired data of a certain type of steel in the database is accumulated to be not less than 400 heat number. The method disclosed by the invention comprises steps of acquiring operation data, building the database and using the computer to process the data rapidly and accurately; the reference heat method absolutely can be used for replacing the existing slagging method for manually determining the amount of the added slagging material and has the advantages of solving the instability of manual determination, optimizing the refining effect, stabilizing the quality of refined liquid steel and promoting standardized operation.

Description

technical field [0001] The invention relates to a method for determining the addition amount of slagging materials and deoxidized alloys in an LF refining furnace by using a reference furnace method, and belongs to the technical field of LF refining in the steelmaking process. Background technique [0002] The main tasks of the LF refining process are deoxidation, desulfurization, removal of inclusions and adjustment of molten steel temperature and chemical composition. LF furnace plays an important role in the smelting process with its unique refining function, good refining effect and simple operation process. It can adjust the temperature of molten steel and keep it warm for a long time, coordinating continuous casting equipment The production rhythm between the steelmaking furnace, the improvement of steel quality, and the expansion of production varieties, LF refining furnace has become an indispensable equipment to ensure smooth continuous casting production. In the L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C21C7/076
CPCY02P10/20
Inventor 刘洪银倪培亮王明杰韩汝文江洪广席超刘炳俊李顺陈文达冷威威杨波苏晓明王博刘超
Owner LAIWU STEEL YINSHAN SECTION CO LTD
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