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Modifying agent for calcium-series steel ladle slag and application method thereof

An application method and technology of a modifier, applied in the field of metallurgy, can solve the problems of high cost, high slag viscosity, poor covering effect, etc., and achieve the effects of reducing nitrogen absorption in molten steel, reducing the oxidation of ladle slag, and improving covering effect.

Inactive Publication Date: 2017-01-25
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modifier is a reductive modifier, which can solve the oxidation problem of ladle top slag in the production process of low-carbon pipeline steel, and provide guarantee for vacuum desulfurization and purified production of pipeline steel, but it still needs to add a large amount of aluminum element or A large amount of CaO, high cost, high slag viscosity, poor coverage

Method used

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  • Modifying agent for calcium-series steel ladle slag and application method thereof
  • Modifying agent for calcium-series steel ladle slag and application method thereof
  • Modifying agent for calcium-series steel ladle slag and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1～6

[0040] 1) Implementation conditions:

[0041] (1) Equipment: Nominal 200t top-bottom combined blowing converter, 200tLF furnace;

[0042] (2) Production process: converter smelting→LF→(RH)→continuous casting;

[0043] (3) The steel types of Examples 1 to 6 are: P490CL, Q235 pipe, P510L, M4R22, P280VK, HC340LA

[0044] 2) The composition (parts by weight) and particle size of the calcium-based ladle slag modifier used in Examples 1-6 are shown in Table 1.

[0045] Table 1. Composition and particle size of Ca-based ladle slag modifiers in Examples 1-6

[0046]

[0047]

[0048] 3) See Table 2 for details of the addition amount and addition time of the calcium-based ladle slag modifier.

[0049] Table 2 Example 1~6 Calcium-based ladle slag modifier usage table

[0050]

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Abstract

The invention relates to a modifying agent for steel ladle slag and an application method thereof, and specifically relates to a modifying agent for calcium-series steel ladle slag and an application method thereof, belonging to the technical field of metallurgy. The modifying agent for calcium-series steel ladle slag comprises the following components: 60-80 parts by weight of CaC2, 15-35 parts by weight of Al2O3, 5-20 parts by weight of CaO, less than or equal to 0.1 part by weight of S, less than or equal to 0.1 part by weight of P and the balance of inevitable impurities. The invention provides the preparation method and application method for the modifying agent for steel ladle slag, for achieving the purposes of modifying the original steel ladle slag, improving the covering effect of the original steel ladle slag, reducing the oxidability of the steel ladle slag and quickly forming the slag.

Description

technical field [0001] The invention relates to a ladle slag modifier and an application method thereof, in particular to a calcium-based ladle slag modifier and an application method thereof, and belongs to the technical field of metallurgy. Background technique [0002] After Xichang Iron and Steel Vanadium Converter adopts the sliding plate slag blocking process, the average amount of slag dropped from 2365kg / furnace to 1183kg / furnace, and the amount of slag dropped by half per ton of steel, which is beneficial to reducing the return of sulfur and phosphorus in the refining process and reducing the consumption of deoxidized alloys There are certain advantages, but with the reduction of the amount of slag, the slag layer on the liquid surface of the steel is thin, and its heat preservation effect becomes worse. According to statistics, under the conditions of the two slag blocking processes in the same period, the sliding plate slag blocking converter tapping—small platform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C7/076
CPCC21C7/0087C21C7/076Y02P10/20
Inventor 周伟曾建华王建成波何俊峰
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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