Silicon-manganese-calcareous shale deoxidizer and preparation method thereof

A calcareous shale, silicon-manganese-calcium technology, applied in the field of steelmaking, can solve problems such as high cost and unsmoothness, and achieve the effects of smooth process, content reduction and steelmaking cost reduction

Active Publication Date: 2013-12-18
芜湖县天海耐火炉料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the deoxidizers used in the domestic industrial steelmaking production process are mainly calcium, aluminum or iron alloys, etc. The deoxidation effect has always reached the level of 60-100PPM, and the effect is average. Observe that there are large bubbles and slag inclusions in the section of the billet, and the cost is high

Method used

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  • Silicon-manganese-calcareous shale deoxidizer and preparation method thereof

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Embodiment 1

[0010] Embodiment 1: Silico-manganese calcareous shale deoxidizer, the parts by weight of its raw materials are: quartz sand 45, black manganese ore 18, lapis lazuli 8, limestone 55, calcareous shale 25, iron filings 8, fly ash 15. Vermiculite 12. Sepiolite 8.

[0011] The preparation method of the silico-manganese calcium shale deoxidizer comprises the following steps: weighing each raw material according to the weight portion of the constituent raw materials, mixing, smelting at a high temperature of 2500-2800 DEG C for 2-3 hours, cooling and crushing to obtain.

[0012] The following is the deoxidation test, the test steel is low carbon steel, used in 2# furnace, 1.40kg / t steel

[0013] Hot metal conditions:

[0014] [S]S% [P]% 0.037-0.032 0.190-0.150

[0015] Deoxygenation result:

[0016] serial number furnace number Addition amount of the present invention (kg) Oxygen content (PPm) 1 2-12807 20 40.21 2 2-12808 20 37...

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Abstract

The invention discloses a silicon-manganese-calcareous shale deoxidizer and a preparation method thereof. The silicon-manganese-calcareous shale deoxidizer comprises the following raw materials in parts by weight: 40-50 parts of quartz sand, 15-20 parts of black manganese ore, 5-10 parts of celestine, 50-60 parts of limestone, 20-30 parts of calcareous shale, 5-10 parts of scrap iron, 10-20 parts of coal ash, 10-15 parts of vermiculite and 5-10 parts of sepiolite. The silicon-manganese-calcareous shale deoxidizer disclosed by the invention has the advantage that a formula is reasonable and the calcareous shale, the scrap iron, the coal ash, the vermiculite and the sepiolite are adopted as raw materials, so that the deoxidizer has a good deoxidizing effect, the content of nonmetal impurities in steel can be reduced, the forms of the impurities can be changed, molten steel is purified, the liquidity of the molten steel is improved, the continuous casting process of a molten steel blank is smooth, no accretion is generated at a continuous casting nozzle, thus, the smooth casting production is facilitated, the use performance of the steel is improved and the service life of the steel is prolonged; and the steelmaking cost is reduced.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a silicon-manganese-calcium shale deoxidizer and a preparation method thereof. Background technique [0002] At present, the deoxidizers used in the domestic industrial steelmaking production process are mainly calcium, aluminum or iron alloys, etc. The deoxidation effect has always reached the level of 60-100PPM, and the effect is average. It is observed that there are large bubbles and slag inclusions in the section of the slab, and the cost is high. Contents of the invention [0003] The object of the present invention is to provide a silicon-manganese calcareous shale deoxidizer and its preparation method, using calcareous shale, iron filings, fly ash, vermiculite and sepiolite as raw materials, the deoxidation effect is obvious, and it can effectively remove Inclusions in molten steel improve the fluidity of molten steel. [0004] In order to achieve the above object...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06
Inventor 吴大宏童振兰
Owner 芜湖县天海耐火炉料有限公司
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