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Fluorine-free environment-friendly type continuous casting protecting slag for the blast furnace slag containing titanium and the manufacturing process of the same

A technology for continuous casting mold slag and blast furnace slag, which is applied in the field of continuous casting mold mold mold and its manufacturing field, can solve the problems of large volatile matter, uneven melting of base materials, poor fluidity, etc.

Inactive Publication Date: 2004-03-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production method of the base material, it can avoid the phenomenon of uneven melting of the base material due to the difficulty of unloading the fluorine-free pre-melted slag in the furnace and poor fluidity; at the same time, it can also solve the volatile matter caused by the flux during the use of the mixed production method The problem of large and difficult to remove moisture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The finished composition and weight percentage of the fluorine-free environment-friendly continuous casting mold slag containing titanium blast furnace slag are:

[0053] CaOSiO 2 TiO 2 Na 2 O B 2 o 3 MnO MgO C Al 2 o 3 Fe 2 o 3 h 2 o

[0054] 28.9%, 33.2%, 4.0%, 3.9%, 3.6%, 4.4%, 3.5%, 12.0%, 4.3%, 1.9%, 0.3%

[0055] Its raw material weight percentage is composed of:

[0056] Sintering base material Titanium-containing blast furnace slag Manganese ore powder Wollastonite Quartz sand Industrial soda Bentonite Carbon black Earthy graphite

[0057] 44% 17% 9% 6% 6.5% 1% 3% 2% 11.5%

[0058] Wherein the sintered base material weight percent that adopts is composed of:

[0059] Limestone Dolomite Quartz Sand Industrial Soda Borax Bentonite

[0060] 33% 28% 15% 7% 13% 4%

[0061] The production of the fluorine-free billet mold flux is carried out in two steps, including the synthesis of the base material and the preparation of the finished mold flux. T...

Embodiment 2

[0063] The finished composition and weight percentage of the fluorine-free environment-friendly continuous casting mold slag containing titanium blast furnace slag are:

[0064] CaOSiO 2 TiO 2 Na 2 O B 2 o 3 Li 2 O MnO MgO C Al 2 o 3 Fe 2 o 3 h 2 o

[0065] 29.1%, 31.8%, 4.6%, 6.4%, 4.6%, 1.9%, 4.4%, 4.2%, 5.0%, 4.9%, 2.8%, 0.3%

[0066] Its raw material weight percentage is composed of:

[0067] Sintering base material Titanium-containing blast furnace slag Manganese ore powder Wollastonite Industrial soda Lithium carbonate Bentonite Carbon black Earthy graphite

[0068] 52% 19% 8% 4% 4% 4% 3% 2% 4%

[0069] The sintered base material used for No. 2 slag is the same as that of Example 1, and its slag making process is also the same as that of Example 1. No. 2 slag is used on the slab caster, and the pouring section is 170×1200mm 2 , The working casting speed is 1.4m / min., casting low-alloy steel such as 16MnR, the slag crystallization rate is 28%, which mee...

Embodiment 3

[0071] The finished composition and weight percentage of the fluorine-free environment-friendly continuous casting mold slag containing titanium blast furnace slag are:

[0072] CaOSiO 2 TiO 2 Na 2 O B 2 o 3 Li 2 O MnO MgO C Al 2 o 3 Fe 2 o 3 h 2 o

[0073] 31.1%, 29.2%, 6.7%, 4.2%, 3.8%, 0.9%, 4.2%, 3.7%, 8.0%, 5.0%, 2.9%, 0.3%

[0074] Its raw material weight percentage is composed of:

[0075] Sintering base material Titanium-containing blast furnace slag Manganese ore powder Wollastonite Lithium carbonate Bentonite Carbon black Earthy graphite

[0076] 46% 28% 9% 3% 2% 3% 2% 7%

[0077] The sintered base material used for No. 3 slag is the same as that of Example 1, and its slag making process is also the same as that of Example 1. No. 3 slag is used on the slab caster, and the pouring section is 240×1400mm 2 , The working casting speed is 0.75m / min., the pouring steel type is peritectic steel (such as ship steel) that is prone to surface cracks, and t...

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Abstract

The present invention relates to steel-making crystallizer protecting dregs, and is environment protecting fluoride-free protecting dregs suitable for continuous casting of plate billet and square billet. The protecting dregs consist of sintering base material, titanium-containing blast slag, manganese ore powder, bentone, carbon black, clay shaped graphite, etc. Its production process includes the synthesis of base material and the compounding of protecting dregs. The protecting dregs may be molten in the crystallizer homogeneously to produce cast billet lubricating and heat insulating effect and has no corrosion to casting machine and no pollution to water.

Description

Technical field: [0001] The invention relates to mold powder for continuous casting steel crystallizers and a manufacturing method thereof, which is a fluorine-free and environment-friendly mold powder suitable for continuous casting of slabs and billets. Background technique: [0002] In the development process of continuous casting technology, mold powder plays an extremely critical role. It can be said that continuous casting can reach the current level is inseparable from mold powder technology. Therefore, continuous casting mold flux technology has become an important part of modern continuous casting technology. From the perspective of the development process of mold flux technology, its current research and application mainly focus on fluorine-containing continuous casting mold flux. In the usual continuous casting mold flux, 5-15% of fluoride such as fluorite, cryolite, etc. are added, which is the main source of fluorine in the continuous casting process. The exis...

Claims

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Application Information

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IPC IPC(8): B22D11/111
Inventor 唐萍文光华
Owner CHONGQING UNIV
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