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Process for preparing granular hollow protecting slag from starch solution

A technology of starch solution and mold flux, which is applied in the field of manufacturing hollow granular mold flux from starch solution, which can solve problems such as unqualified billet, small part deviation, and influence on production stability, so as to improve quality, inhibit excessive formation, and disperse excellent effect

Inactive Publication Date: 2005-02-16
SANYI METALLURGICAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the powdered starch does not dissolve, but uses the starch reaction to achieve the physical dispersion of starch granules, which leads to the deviation of fine parts
Due to the insufficient dispersion of the particulate carbon relying on starch, the increase of the slag bridge in the continuous casting production is caused, and the slag bridge needs to be manually removed in the production, which becomes the cause of affecting the stability of the production and causing the slab to be unqualified

Method used

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  • Process for preparing granular hollow protecting slag from starch solution
  • Process for preparing granular hollow protecting slag from starch solution
  • Process for preparing granular hollow protecting slag from starch solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for producing hollow granular mold powder with starch solution, the steps of the method are:

[0023] (1) Inject 180 liters of industrial water at a normal temperature of 5° C. into the starch reactor 1, then add 20 kilograms of powdered starch, stir evenly, and heat to 85° C. for 5 minutes to make 200 kilograms of starch gel;

[0024] (2) under the state that starch gel is not hardened, dilute in the industrial water of spiral mixing tank 2, with 400 liters of industrial water, the starch gel of 200 kilograms is made into 600 kilograms of colloidal starch solution, specific gravity is 1.7;

[0025] (3) Add 1,000 kilograms of raw materials for manufacturing mold powder into the colloidal starch solution, and fully stir to make it evenly mixed;

[0026] (4) Spray with particle dryer 3 to make hollow granular mold flux.

Embodiment 2

[0028] A method for manufacturing hollow granular mold powder with starch solution, the steps of the method are:

[0029] (1) Inject 870 liters of industrial water at a normal temperature of 13° C. into the starch reactor 1, then add 130 kilograms of powdered starch, stir evenly, and heat to 90° C. for 5 minutes to make 1000 kilograms of starch gel;

[0030] (2) under the state that starch gel is not hardened, dilute in the industrial water of spiral mixing tank 2, with 4000 liters of industrial water, the starch gel of 1000 kilograms is made into 5000 kilograms of colloidal starch solution, specific gravity is 1.65;

[0031] (3) Add 9,900 kilograms of raw materials for manufacturing mold flux to the colloidal starch solution, and stir fully to make it evenly mixed;

[0032] (4) Spray with particle dryer 3 to make hollow granular mold flux.

Embodiment 3

[0034] A method for manufacturing hollow granular mold powder with starch solution, the steps of the method are:

[0035] (1) Inject 930 liters of industrial water at a normal temperature of 25° C. into the starch reactor 1, then add 70 kilograms of powdery starch, stir evenly, and heat to 80° C. for 7 minutes to make 1000 kilograms of starch gel;

[0036] (2) under the state that starch gel is not hardened, dilute in the industrial water of spiral mixing tank 2, with 4000 liters of industrial water, the starch gel of 1000 kilograms is made into 5000 kilograms of colloidal starch solution, specific gravity is 1.80;

[0037] (3) Add 10,300 kilograms of raw materials for manufacturing mold powder into the colloidal starch solution, and fully stir to make it evenly mixed;

[0038] (4) Spray with particle dryer 3 to make hollow granular mold flux.

[0039] The hollow granular mold powder produced by the three examples is used in the continuous casting process and has achieved re...

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Abstract

A process for preparing hollow granular protecting slag used in crystallizer includes such steps as mixing water with starch, heating to 80-90 deg.C to obtain starch sol, before the starch sol becomes solidified, stirring while adding water to obtain colloidal starch solution, adding the raw materials of protecting slag, and spray drying.

Description

(1) Technical field [0001] The invention relates to a method for manufacturing mold flux, an additive used in a crystallizer for continuous steel casting, in particular to a method for manufacturing hollow granular mold flux with starch solution. (2) Background technology [0002] Mold flux is the main auxiliary consumable material used as an additive in the mold in the continuous casting process. Put it into the molten steel in the crystallizer, and after being heated, there will be three layers of unmelted layer, sintered layer and molten slag layer. The functions of this mold slag are: the heat preservation effect of preventing the solidification of molten steel, which is closely related to the carbon content; the function of blocking the contact between the molten steel and the air and preventing the re-oxidation of the molten steel; Lubrication between the mold and the mold; the role of the heat transfer medium between the solidified shell and the mold; especially when...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
Inventor 金宽椿金光成
Owner SANYI METALLURGICAL MATERIAL