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Preparation method of environmentally-friendly dry material for continuous casting tundish

An environment-friendly, continuous casting technology, applied in the field of refractory materials, can solve the problems of service life (the number of continuous casting furnaces is not high, secondary pollution of molten steel in the tundish, affecting the purity of molten steel, etc., and achieve significant economic and social benefits, Improved corrosion resistance and long service life

Inactive Publication Date: 2012-07-18
德清县力拓炉料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005]At present, the domestic enterprises that produce continuous casting tundish dry material basically adopt the dry material production process and raw material formula introduced in the 1990s (A1203 , Si02 and other fine powders and solid phenolic resin as a binder), which makes the domestic tundish dry material products generally have low strength, The service life (the number of continuous pouring furnaces) is not high, especially because the product contains trace amounts of carbon, water, phenol, aldehyde, etc., and it is easy to cause secondary pollution to the molten steel in the tundish (the carbon and other elements contained in the product will affect The purity of molten steel), and sometimes hydration, cracking and other phenomena (even a small amount of cracked waste) will occur during the baking process, and will produce harmful gases to the human body, which makes the conventional domestic tundish dry material no longer It is difficult to meet the needs of large iron and steel enterprises to produce continuous casting high-grade steel

Method used

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  • Preparation method of environmentally-friendly dry material for continuous casting tundish

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Experimental program
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Effect test

Embodiment 1

[0029] Environmentally friendly continuous casting tundish dry material, the tundish dry material includes the following components by weight percentage: MgO 83%, anhydrous resin 1%, α-Al 2 0 3 3%, SiO 2 3%, CaO10%; Among them, MgO and SiO which account for 3% of the total weight in the above components 2 For superfine powder, MgO and SiO 2 The weight ratio of the ultrafine powder is 6:4, and the particle size of the superfine powder is less than 2 μm.

[0030] The above-mentioned preparation method of environment-friendly continuous casting tundish dry material comprises the following steps: ① magnesia is pulverized, and magnesia is selected from high-quality magnesia; ② ingredients are prepared according to the above-mentioned formula; Refining, the above-mentioned environment-friendly continuous casting tundish dry material can be obtained.

Embodiment 2

[0032] Environmentally friendly continuous casting tundish dry material, the tundish dry material includes the following components by weight percentage: MgO 80%, dodecane 2%, α-Al 2 0 3 3%, SiO 2 5%, CaO10%; Among them, MgO and SiO which account for 3% of the total weight in the above components 2 For superfine powder, MgO and SiO 2 The weight ratio of the ultrafine powder is 1:1, and the particle size of the superfine powder is less than 2 μm.

Embodiment 3

[0034] Environmentally friendly continuous casting tundish dry feed, the tundish dry feed includes the following components by weight percentage: MgO 85%, hexamethylenetetramine 1%, α-Al 2 0 3 3%, SiO 2 3%, CaO 8%; Among them, MgO, SiO which account for 5% of the total weight in the above components 2 For superfine powder, MgO and SiO 2 The weight ratio of the ultrafine powder is 4:6, and the particle size of the ultrafine powder is less than 2 μm.

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Abstract

The invention relates to a refractory material and especially relates to an environmentally-friendly dry material for a continuous casting tundish and a preparation method thereof. The preparation method of the environmentally-friendly dry material for a continuous casting tundish comprises the following steps of 1, crushing magnesia, 2, preparing auxiliary materials and additives of 70 to 90 wt%of MgO, 0.5 to 5 wt% of one or more resin additives, 1 to 6 wt% of alpha-Al2O3, 1 to 10 wt% of SiO2 and 5 to 20 wt% of CaO, wherein the weight of submicron powder of MgO and SiO2 is 1 to 6 wt% of thetotal weight of the auxiliary materials and the additives; and the submicron powder has granularity below 2 micrometers, and 3, adding the auxiliary materials and the additives into the crushed magnesia and carrying out mixing. The environmentally-friendly dry material for a continuous casting tundish has environmental benefits, good heat-resistance strength, good corrosion resistance and a long service life. Through the preparation method, obvious economic benefits and social benefits are obtained.

Description

[0001] The present invention application is a divisional application of the invention patent application with the patent number: 200810121599.9, the patent name: environment-friendly continuous casting tundish dry material and its preparation method, and the application date: 2008-10-23. technical field [0002] The invention relates to a refractory material, in particular to a continuous casting tundish dry material and a preparation method thereof. Background technique [0003] Continuous casting tundish, as an important key equipment of high-efficiency continuous casting technology commonly used in the steel industry at home and abroad, plays an important role in stabilizing continuous casting production and improving the quality of continuous casting slabs. Therefore, the development and development of new refractory materials and products related to continuous casting tundish has always been a focus of the metallurgical refractory industry. The continuous development an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 陆建荣
Owner 德清县力拓炉料有限公司