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30MnSi refining acceleration method
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A technology for refining slag and molten steel, which is applied in the field of accelerating the refining of 30MnSi, can solve the problems of time waste, temperature loss, etc., and achieve the effect of complete melting uniformity, uniform composition of molten steel, and shortening the refining cycle
Inactive Publication Date: 2019-01-15
SHANXI TONGCAI IND & TRADE
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Abstract
Description
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Problems solved by technology
Because in the process of sampling and analysis, it takes about 7 to 8 minutes from sampling to refining the composition of the sample, and during this period, there is no operation, resulting in waste of time and loss of temperature
Method used
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Embodiment 1
[0011] Embodiment 1: a kind of method of quickening the refining of 30MnSi comprises the following steps:
[0012] a. Slag returning operation: return the remaining refining slag in the molten steel that has been poured to the molten steel that is ready for refining;
[0013] b. First power transmission: power transmission for 5 minutes, temperature 1560 degrees Celsius, sampling for the first time, adding alloy and carbon according to internal control requirements according to component analysis;
[0014] c. Second power transmission: take a second sample after 6 minutes of power transmission, and fine-tune the composition to the target value according to the composition.
Embodiment 2
[0015] Embodiment 2: a kind of method of quickening the refining of 30MnSi comprises the following steps:
[0016] a. Slag returning operation: return the remaining refining slag in the molten steel that has been poured to the molten steel that is ready for refining;
[0017] b. First power transmission: power transmission for 6 minutes, temperature 1590 degrees Celsius, first sampling, according to composition analysis and internal control requirements to add alloy and carbon;
[0018] c. Second power transmission: take a second sample after 5 minutes of power transmission, and fine-tune the composition to the target value according to the composition.
Embodiment 3
[0019] Embodiment 3: a kind of method of quickening the refining of 30MnSi comprises the following steps:
[0020] a. Slag returning operation: return the remaining refining slag in the molten steel that has been poured to the molten steel that is ready for refining;
[0021] b. The first power transmission: 5.5 minutes of power transmission, the temperature is 1575 degrees Celsius, the first sampling is carried out, and the alloy and carbon are added according to the internal control requirements according to the composition analysis;
[0022] c. Second power transmission: take a second sample after 5.5 minutes of power transmission, and fine-tune the composition to the target value according to the composition.
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Abstract
The invention relates to the technical field of 30MnSi refining, in particular to a 30MnSi refining acceleration method. The 30MnSi refining acceleration method comprises the steps of slag return operation, primary power-on and secondary power-on. Through slag return operation, residual refining slag in poured molten steel is returned to molten steel prepared for refining so that the primary power-in time of a refining furnace can be shortened to 5-6 min during 30MnSi production, the refining slag can be completed molten, and complete melting of alloys in the molten steel and uniformity of molten steel components can be ensured completely. Power-on operation can be conducted in the sample waiting process after sampling for the first time, the appropriate refining temperature achieved in the secondary power-on process is ensured, and the refining period is shortened.
Description
technical field [0001] The invention relates to the technical field of 30MnSi refining, in particular to a method for accelerating the refining of 30MnSi. Background technique [0002] At present, the production process in the 30MnSi production process requires that the first power transmission time is 8-12 minutes, and the temperature is greater than 1540 °C to take samples; according to the composition analysis, the alloy and carbon increase are added according to the internal control requirements, and the second sample is taken after power transmission for ≥ 5 minutes. Components fine-tune components to target values. Because in the process of sampling and analysis, it takes about 7 to 8 minutes from sampling to refining the composition of the sample, and during this period, there is no operation, resulting in waste of time and loss of temperature. Contents of the invention [0003] In order to solve the deficiencies and defects of the prior art, the present invention ...
Claims
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Application Information
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