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Slag splashing furnace protecting material and preparation method thereof

A technology for protecting furnace and magnesite by slag splashing, which is applied in the field of slag splashing and furnace protection and its preparation, can solve the problems of energy saving, consumption reduction, incompatibility with the development trend of high efficiency, etc., so as to facilitate furnace protection and increase wettability. , the effect of increasing the melting temperature and viscosity

Active Publication Date: 2014-02-26
PANZHIHUA SHUNTENG GRP METALLURGY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the currently disclosed slag-splashing furnace protection materials play a significant role in protecting the furnace after use, they can only be used for one furnace usually, and slag-splashing is required again after tapping. This is obviously in line with the energy saving, The development trend of consumption reduction and high efficiency does not match

Method used

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  • Slag splashing furnace protecting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of slag-splashing furnace protection material is prepared by the following steps:

[0033] (1) Mix the proportioned raw materials according to the formula: 28% of magnesite; 41% of lightly burned magnesium powder; 10% of magnesium powder; 15% of silicon micropowder; ; Wherein the chemical composition in magnesite is calculated by weight percentage, MgO 38-45%, SiO 2 1-2%, CaO 1-2%, and the rest are impurities; the chemical composition of light-burned magnesium powder is calculated by weight percentage, MgO 90-95%, SiO 2 0.5-1%, CaO 0.5-1.5%, the rest are impurities;

[0034] (2) Mixing and crushing the raw materials mixed in step (1) until the particle size is less than 3mm;

[0035] (3) Add an appropriate amount of water to the mixture prepared in step (2) (the addition of water does not have a chemical effect on the mixture, it is only for granulation needs, it can be based on the actual extrusion granulation needs, the technology in the field The person...

Embodiment 2

[0037] A kind of slag-splashing furnace protection material is prepared by the following steps:

[0038] (1) Mix the proportioned raw materials according to the formula: 25% magnesite; 45% lightly burned magnesium powder; 12% magnesium powder; 12% silicon micropowder; 2.5% nano-scale titanium dioxide; C; wherein the chemical composition of magnesite is calculated by weight percentage, MgO 38-45%, SiO 2 1-2%, CaO 1-2%, and the rest are impurities; the chemical composition of light-burned magnesium powder is calculated by weight percentage, MgO 90-95%, SiO 2 0.5-1%, CaO 0.5-1.5%, the rest are impurities;

[0039] (2) Mixing and crushing the raw materials mixed in step (1) until the particle size is less than 3mm;

[0040] (3) Add water to the mixture prepared in step (2) to granulate, then dry and sieve the particles with a particle size of 10-40 mm to obtain the slag-splashing furnace charge.

Embodiment 3

[0042] The slag-splashing furnace protection material obtained in Example 1 is called furnace protection material A, and the slag-splashing furnace protection material obtained in Example 2 is called furnace protection material B, wherein the test of furnace protection material A is selected as the 7# converter of a certain iron and steel plant, and the furnace protection material For the test of B, the 3# converter of a steel plant was selected, and the slag splashing test was carried out according to the following contents:

[0043] The 7# converter and the 3# converter were tested 432 times respectively. Among them, 210 furnaces were splashed with slag, and a total of 89.52 tons of protective materials were used, with an average of 426.31 kg of protective materials used in each furnace. It was carried out in four stages. The details are as follows:

[0044] In the first stage of the test, since the 7# converter and the 3# converter have just completed the thermal replacement...

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Abstract

The invention provides a slag splashing furnace protecting material and a preparation method thereof, belonging to the technical field of steelmaking slag splashing furnace protection. The furnace protecting material comprises 20-30% of magnesite, 35-45% of light-calcined magnesium powder, 5-15% of magnesium powder, 12-20% of silicon micropowder, 2.5-5% of nano titanium white, 3.5-5% of magnesium chloride and the balance of C. The selection of the components and contents in the furnace protecting material can enhance the melting temperature and viscosity of the slag splashing layer, can improve the slag splashing spreadability and wettability, and can have the furnace protecting effect of maintaining more than three furnaces by slag splashing once.

Description

technical field [0001] The invention belongs to the technical field of steelmaking slag splashing furnace protection, and in particular relates to a slag splashing protection furnace material capable of maintaining more than three furnaces in one slag splashing and a preparation method thereof. Background technique [0002] Furnace age is a comprehensive technical and economic index of converter steelmaking. Increasing the furnace life can not only reduce the consumption of refractory materials, increase the operating rate and reduce production costs, but also help to balance the organization of production and promote a virtuous circle of production. Therefore, a substantial increase in the furnace life of the converter is the goal pursued by steelmakers for many years. [0003] The lining of the converter consists of a working layer, a filling layer and a permanent layer of refractories. The working layer is directly in contact with high-temperature molten steel, oxidize...

Claims

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Application Information

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IPC IPC(8): C21C5/36C21C5/44
Inventor 丁玉芬徐宏武王石林王利江王琦
Owner PANZHIHUA SHUNTENG GRP METALLURGY MATERIAL
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