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Foam slag inhibitor for converter

A technology of foam slag and inhibitor, which is applied in the manufacture of converters, etc., can solve the problems of slow onset of effect, achieve the effects of reducing costs, improving the working environment, and reducing the consumption of metal materials

Inactive Publication Date: 2009-07-22
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a foam slag inhibitor for converters, which mainly solves the technical problems that the existing foam slag inhibitor has a slow effect and is not suitable for adding when tapping.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0013] Embodiment 1-4 sees the following table

[0014] fiber pulp Carbonized rice husk clay NaHCO 3 Bentonite 60-75％ 5-15％ 8-14％ 1-6％ 2-12％ Example 1 61 15 12 4 8 Example 2 68 12 8 — 12 Example 3 70 8 14 6 2 Example 4 75 5 10 — 10

[0015] In the present invention, the fiber pulp and clay are dried and crushed to a particle size below 2mm; the carbonized rice husk is screened and crushed to remove impurities, and the particle size is <10mm; the raw materials are mixed according to the above-mentioned component ratios, supplemented with additives and binders for extrusion molding, Dried and bagged, pressed into a cylinder or sphere, Φ: 6.5cm, h: 6.5cm.

[0016] The physical and chemical performance indicators of foam slag inhibitor are as follows;

[0017] Technical indicators: C≥2.0%, volatile + ash≥75.0

[0018] Density 1.5≤g / cm

[0019] Particle size3.0Mj / kg

[0020] Ignition point>350℃

[0021] ...

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Abstract

The invention relates to a foaming slag inhibitor special for a converter, in particular to a foaming slag inhibitor for a top and bottom combined blown converter. The invention aims to solve the technique problems of slow effect and not suitable for being added when tapping in the existing foaming slag inhibitor. The technical proposal is as following: a foaming slag inhibitor special for the converter mainly comprises the main components with weight percentage as follows: fiber pulp: 60 to 75 percent, carbonized rice husk: 5 to 15 percent, clay: 8 to 14 percent; and additives and caking agents in accordance with actual needs. The foaming slag inhibitor special for the converter is mainly used for controlling spraying in converter blowing process, inhibiting furnace slag from frothing for a second time when tapping and preventing furnace mouth from roughing slag.

Description

Technical field: [0001] The invention relates to a foam slag suppressor for a converter, in particular to a foam slag suppressor for a top-bottom combined blowing converter. Background technique: [0002] When medium-phosphorus molten iron is used for smelting, in order to ensure the dephosphorization efficiency of the converter, the amount of slag smelted by the converter is large, the amount of lime is 73-82kg / ton of molten steel, and the amount of light-burned dolomite is 8-11kg / ton of molten steel; at the same time, to ensure The end point of the converter is further dephosphorized, and the TBM top-bottom combined blowing technology is used to enhance bottom blowing and stirring. In this way, the amount of slag in the converter smelting process is large, and under the action of strong stirring, the liquid steel level of the converter is raised, and the slag with high FeO is prone to foaming and splashing during the smelting process; The inner slag surface is easy to ris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C7/064
Inventor 杨和平唐爱华虞大俊刘正祥简明
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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