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Composite ferromanganese mineral ball for steelmaking

A technology of iron ore balls and manganese oxide ore, which is applied in the field of slag-making balls for steelmaking, and can solve the problems of difficult control of the addition amount, inconspicuous effect of slagging, and splashing, etc.

Inactive Publication Date: 2006-05-31
ZHONGYE STEEL METALLURGIC SCI & TECH IND DEV MAANSHAN
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Problems solved by technology

[0003] At present, steel mills generally use iron oxide scale and ore as raw materials for promoting slag melting, but due to the high activity of iron oxide scale, it is not easy to control the amount added. If it is too large, it will easily cause early splashing, and if it is too small, the slag will not melt well; The melting speed is slow, the slag melting time is long, and the slag melting effect is not obvious

Method used

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  • Composite ferromanganese mineral ball for steelmaking

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Embodiment Construction

[0021] For further describing the present invention, below in conjunction with embodiment and comparative example the present invention is described in more detail, but the present invention is not limited to these examples, as the manganese grade of manganese oxide ore powder, the iron grade of iron powder ore can be lower or higher than embodiment .

[0022] Mn20%-30% manganese oxide ore powder with a particle size of 0-2mm, iron powder ore with a particle size of 0-3mm TFe45%-50%, dolomite powder with a particle size of 0-2mm, and a particle size of 0-3mm The silicon powder of 2mm, bonding agent prepare steelmaking composite manganese iron ore ball of the present invention according to grade (Mn%, TFe%) shown in table 1, each component content (weight %):

[0023] Table 1

[0024]

[0025] After mixing the components of the composite manganese iron ore ball for steelmaking in the present invention according to the general method, add an appropriate...

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Abstract

A ferromanganese mineral ball compound for steel-making which consists of 50úÑ-60úÑof manganese oxide oreú¼20úÑ-25úÑof iron powder oreú¼10úÑ-20úÑof dolomite powder ú¼4úÑ-6úÑof silicon powder and 4úÑ-6úÑ of agglomerant by weight percentage. All of these components are mixed and press forming. Advantages of this compound are lower production costú¼higher product capability and higher slag-melting efficiency so as to increase manganses content by the end-point of steel-making and to reduce smelting cost. It also simplifies charging technique and makes deprivation of (P)íó(S)íó(Si)from steel easier. This environmental protective compound can be widely used as refrigerant and slag-melting agent in slagging process in electric steelmaking and pneumatic steelmaking and can be used to improve manganese use ratio.

Description

technical field [0001] The invention relates to a slagging ore ball for steelmaking, in particular to a composite manganese iron ore ball for steelmaking containing manganese and iron mineral raw materials, which can be widely used in the slagging process of electric furnace steelmaking and converter steelmaking as a Coolant, slag remover and partial replacement of silicomanganese alloy. Background technique [0002] The main task in the oxidation stage of electric furnace smelting is to form and dissolve slag as soon as possible; the main task in the early stage of converter blowing is to remove [P], and the prerequisite for removing [P] is to have good slag. The most ideal raw material for promoting slagging is fluorspar, which has been banned in steelmaking due to environmental protection requirements. [0003] At present, steel mills generally use iron oxide scale and ore as raw materials for promoting slag melting, but due to the high activity of ir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04C21C7/06C21C7/064
Inventor 黄志勇
Owner ZHONGYE STEEL METALLURGIC SCI & TECH IND DEV MAANSHAN
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