CN201024183Y

CN201024183Y - Composite bed type structural steel slag modifier granule

Info

Publication number: CN201024183Y
Application number: CNU2007200118649U
Authority: CN
Inventors: 陶斌; 廖严之
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-27
Filing date: 2007-04-27
Publication date: 2008-02-20
Anticipated expiration: 2017-04-27

Abstract

The utility model relates to the technical field of modifying and processing steel slag by the methods of producing new slag with ladle, dilution and reduction, in particular to a granular ladle modifier of composite layer structure, and is a four-layer structure, namely a slag producing agent layer, a diluents layer, a metal powder layer and a flux layer in sequence from inside to outside. Size of the modifier grain is 5mm to 25mm. Ratio of thickness of each layer is: the slag producing agent layer: the diluents layer: the metal powder layer: the flux layer is 1: 0.2-0.3: 0.3-0.4: 0.1-0.2. The slag producing agent layer is filled with activated white lime or metallurgical white lime; the diluents layer is filled with bauxite or dolomite; the metal powder layer is filled with aluminum, magnesium or Al-Mg alloy; the flux layer is filled with fluorite or boron oxide. Slag producing agent is engulfed by diluents, therefore the slag producing agent is protected from hydration; the diluents are engulfed by the metal powder layer so that the metal powder can be properly distributed in the steel slag to have most of the metal powder reacted with oxygen in the steel slag, thereby decreasing the possibility that the metal powder reacts with oxygen in the air and in the steel and improving use efficiency of the metal powder.

Description

Composite layer structure iron slag modifier particle

Technical field

The utility model relates to ladle and makes new slag, dilution method and reduction method steel slag modification processing technology field, particularly a kind of composite layer structure iron slag modifier particle.

Background technology

Eliminating and control hyperoxia voltinism slag is one of key link of Clean Steel smelting, be meant that molten steel and top slag in the ladle is carried out upgrading to be handled reducing and control slag oxidisability, ladle top slag carried out upgrading handle the modes such as processing, dilution or reduction of generally taking to skim and handle.Skimming, to handle be that mechanically new slag is realized reducing and control slag oxidisability from making again after molten steel surface is removed with hyperoxia voltinism slag; Dilution method is oxidizing substance concentration to be reduced realize reducing and control slag oxidisability by increasing the quantity of slag; Reduction method is to utilize in the material reduced steel slags such as Al base, Mg base oxidizing substance to realize reducing and control slag oxidisability.

No matter slag former, thinner, reduction method steel slag modification all add in the ladle with the slag charge form, and these slag charges comprise slag forming agent, thinner, solubility promoter, reductive agent and other auxiliary agent.Slag forming agent is generally selected active metallurgical lime for use in recent years generally based on metallurgical lime; Thinner generally can with slag former good combination, melting property material preferably mutually; Solubility promoter is generally selected low melting points such as fluorite, boric anhydride for use, promotes fusing, improves burn-off rate; Reductive agent mostly be metal simple-substance aluminium, magnesium, aluminum magnesium alloy etc. can reduced steel slag in oxidizing substance; Other auxiliary agent plays effects such as shaping, bonding, surface protection.

The widely used steel slag modification agent of smelter at present generally all is to utilize the plurality of raw materials mixed melting to handle the back fragmentation, is controlled to branch when batch mixing, needs heat treated, makes its mutual fusion form modification agent.Can find by retrieval that in addition a lot of patents all are that constantly agent improves and improves to steel slag modification from being controlled to aspects such as branch angle, processing and manufacturing angle, have all ignored the influence of modification agent structure to its use.

The production technique of modification agent need be carried out melting treatment at present, and raw material blended homogeneity is difficult to ensure, general a large amount of modification agent composition is fixed, can find that its composition deviation is bigger and carry out a small amount of sampling analysis, this just causes in use, particularly the short run of every heat is used and is caused the composition deviation big, can influence the STEELMAKING PRODUCTION of continous-stable.

Slag forming agent in the common modification agent, mainly be metallurgical lime or active lime, being characterized in easily absorbing water influences result of use after the sex change, after the sex change, can have a strong impact on burn-off rate, the slagging performance of modification agent if lime takes place to absorb water in production, packing, transportation.

Reductive agent composition in the modification agent in use, may because of with air in the oxygen reaction can cause the loss of effective reductive agent, can influence the oxidizing substance in its reduced steel slag.

Summary of the invention

The utility model has designed a kind of composite layer structure iron slag modifier particle, can prevent lime suction sex change in the modification agent, can improve the utilization ratio of reductive agent in the modification agent and can guarantee that composition is uniform and stable, realize fusing slagging fast simultaneously, reduce the purpose of slag oxidisability fast.

According to the steel slag modification agent become to be grouped into, service requirements and handling characteristics, composite layer structure iron slag modifier particle of the present utility model is characterized in that from the center that from inside to outside structure is the steel slag modification agent particle of the four-layer structure of slag forming agent layer, thinner layer, metal bisque, fusing assistant layer composition successively.

Described particle size: 5mm～25mm.

At the every layer thickness size ratio of described particle be: slag forming agent layer: thinner layer: metal bisque: fusing assistant layer=1: 0.2～0.3: 0.3～0.4: 0.1～0.2.

Described thinner layer is bauxitic clay or or rhombspar.Described metal bisque is aluminium, magnesium or aluminum magnesium alloy, and described fusing assistant layer is for being fluorite or boric anhydride.

Modification agent grain pattern of the present utility model, from the center from inside to outside successively structure be four-layer structures such as thinners such as slag forming agent, bauxitic clay, metal powder, fusing assistant such as active lime.Its center is components such as active lime, because the easy aquation of active lime influences its activity, and the fusing point of active lime is higher, so design it in the particle centre, removes air moisture to prevent it; Thinner composition is enclosed in outside the slag forming agent and not only can guarantees good mutual mixing but also can play slagging and prevent the provide protection of aquation; Metal-powder is enclosed in outside the thinner, and in use, metal-powder can violent thermopositive reaction take place with oxygen, emits a large amount of heats, promotes the fusing of slag forming agent and thinner; Outside the metal powder layer, promptly the particulate outermost layer is a fusing assistant, plays the oxidation that prevents metal-powder, in use, fusing assistant contacts slag at first, and fusing at first also can make metal-powder be scattered among the slag well, fusing assistant issues the first portion decomposition reaction in hot conditions, discharges CO ₂Deng gas, can hermetic section air, make that oxygen reacts in the metal-powder overwhelming majority and the slag, and reduce oxygen reaction in the oxygen and steel in metal-powder and the atmosphere, the service efficiency of raising metal-powder.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

Below in conjunction with description of drawings embodiment of the present utility model.

As shown in Figure 1, composite layer structure iron slag modifier particle of the present utility model is characterized in that from the center that from inside to outside structure is the steel slag modification agent particle of the four-layer structure of slag forming agent layer 1, thinner layer 2, metal bisque 3, fusing assistant layer 4 composition successively.

Described particle size: 5mm～25mm.

At the every layer thickness size ratio of described particle be: slag forming agent layer 1: thinner layer 2: metal bisque 3: fusing assistant layer 4=1: 0.2～0.3: 0.3～0.4: 0.1～0.2.

Thinner composition is enclosed in and plays slagging outside the slag forming agent and prevent the provide protection of aquation; Bauxitic clay is enclosed in outside the thinner, and metal-powder is scattered among the slag well, makes that oxygen reacts in the metal-powder overwhelming majority and the slag, and reduces oxygen reaction in the oxygen and steel in metal-powder and the atmosphere, the service efficiency of raising metal-powder.

Claims

1. composite layer structure iron slag modifier particle is characterized in that being followed successively by from inside to outside from the center steel slag modification agent particle of the four-layer structure that slag forming agent layer, thinner layer, metal bisque, fusing assistant layer form.

2. composite layer structure iron slag modifier particle according to claim 1 is characterized in that at described particle size: 5mm～25mm.

3. composite layer grain pattern steel slag modification according to claim 1 agent is characterized in that at the every layer thickness size ratio of described particle being: slag forming agent layer: thinner layer: metal bisque: fusing assistant layer=1: 0.2～0.3: 0.3～0.4: 0.1～0.2.

4. composite layer structure iron slag modifier particle according to claim 1 is characterized in that at described slag forming agent layer be active lime or metallurgical lime.

5. composite layer structure iron slag modifier particle according to claim 1 is characterized in that at described thinner layer be bauxitic clay or or rhombspar.

6. composite layer structure iron slag modifier particle according to claim 1 is characterized in that at described metal bisque be aluminium, magnesium or aluminum magnesium alloy.

7. composite layer structure iron slag modifier particle according to claim 1 is characterized in that at described fusing assistant layer for being fluorite or boric anhydride.