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Composition for slag formation and preparation and use method thereof

A composition and slag-making technology, applied in the field of compositions for slag-making, can solve the problems of high energy consumption, complex process and the like, and achieve the effects of low energy consumption, simple process and phosphorus removal.

Inactive Publication Date: 2011-11-09
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of slagging agent in order to overcome the technical defects of complex process and high energy consumption when smelting low-phosphorus steel from semi-steel in the prior art, and to use the slag-forming agent to smelt low-phosphorus steel from semi-steel Simple process and low energy consumption

Method used

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  • Composition for slag formation and preparation and use method thereof

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preparation example Construction

[0011] The present invention also provides the preparation method of said composition, wherein, the method comprises CaO, SiO 2 , MnO, MgO and Al 2 o 3 Mix evenly, CaO, SiO 2 , MnO, MgO and Al 2 o 3 The amount of addition makes the formed mixture contain, based on the total weight of the mixture, 45-65% by weight of CaO, 10-20% by weight of SiO 2 , 1-5% by weight of MnO, 9-25% by weight of MgO and 1.5-5% by weight of Al 2 o 3 .

[0012] The CaO can be derived from various materials containing calcium oxide, for example, it can be derived from one or more of manganese ore, lime, light-burned dolomite and composite slagging agent, preferably from lime, light-burned dolomite and composite slagging agent agent; the SiO 2 Can be derived from sludge balls, and composite slagging agent, preferably derived from composite slagging agent; the magnesium oxide can be derived from one or Several, preferably from light burnt dolomite. Manganese oxide can be derived from various ma...

Embodiment 1

[0026] This example is used to illustrate the composition for slagging provided by the present invention.

[0027] 43 parts by weight of lime, 26 parts by weight of lightly burned dolomite and 19 parts by weight of composite slagging agent were uniformly mixed to prepare composition G1 for slagging. The weight ratio of lime, lightly burned dolomite and composite slagging agent is 1:0.6:0.44. CaO, SiO in composition G1 for slagging 2 、Al 2 o 3 The contents of , MgO and MnO in the composition used for slagging are shown in Table 2.

Embodiment 2

[0029] This example is used to illustrate the composition for slagging provided by the present invention.

[0030] 42 parts by weight of lime, 33 parts by weight of lightly burned dolomite and 25 parts by weight of composite slagging agent were uniformly mixed to prepare composition G2 for slagging. The weight ratio of lime, lightly burned dolomite and composite slagging agent is 1:0.8:0.6. CaO, SiO in composition G2 for slagging 2 、Al 2 o 3 The contents of , MgO and MnO in the composition used for slagging are shown in Table 2.

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Abstract

The invention provides a composition for slag formation, which comprises the following components based on the total weight of the composition: 45-65wt% of CaO, 10-20wt% of SiO2, 1-5wt% of MnO, 9-25wt% of MgO and 1.5-5wt% of Al2O3. The invention also provides a preparation method and a use method of the composition. The composition for slag formation provided by the invention can promote slaggingin the early stage of smelting semisteel, shorten the slag formation time, and obviously remove phosphorus elements. By adopting the composition for slag formation of the invention for smelting the semisteel, the process is simple, the energy consumption is low, the effect of reducing phosphorus is obvious, the phosphorus content in molten steel is lower than 0.007wt%, and consumption of the semisteel is small when the same amount of steel is obtained by smelting.

Description

technical field [0001] The invention relates to a composition for slagging and its preparation and use methods. Background technique [0002] As a high-quality steel, low-phosphorus steel has more and more applications, and its demand is also increasing. In the prior art, low-phosphorus steel is mainly obtained from ordinary molten iron through dephosphorization. Can adopt following dephosphorization agent to carry out dephosphorization, for example, the composition of dephosphorization agent is: based on the total weight of dephosphorization agent, lime 60-75 weight %, fluorite 10-25 weight % and iron oxide 0- 20% by weight; the composition of the dephosphorization agent can also be: based on the total weight of the dephosphorization agent, BaO 35-70% by weight, BaF 2 10-35% by weight, MnO 5-13% by weight, CaO 4-10% by weight, Al 2 o 3 2-10% by weight, the remainder is impurities and binders. [0003] Common molten iron contains beneficial vanadium. Many steel mills ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36C21C5/30C21C7/06
Inventor 李安林戈文荪何为肖明富李清春蒋龙奎许登骥李利刚梁新腾
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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