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Fireproof material for mending furnace as well as preparation method and using method thereof

A refractory material and repairing technology, which is applied in the field of gunning furnace refractory materials and its preparation, can solve the problems of low adhesion rate and achieve the effects of low porosity, less springback and high adhesion rate

Inactive Publication Date: 2013-04-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesion rate of this gunning material is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This example is used to illustrate the preparation and application method of the gunning furnace refractory material provided by the present invention.

[0045] Based on the total weight of each raw material, the content of magnesia is 50% by weight (wherein, the weight ratio of magnesia with a particle diameter of 1-3mm and a particle diameter of 3-5mm is 1:1); the content of magnesium powder is 35% by weight (wherein, the weight ratio of particle diameter is 0.2-1mm and the magnesium powder of particle diameter<0.2mm is 1: 1); Aluminum oxide micropowder (particle diameter is≤1mm) content is 5% by weight, calcium oxide micropowder (particle The content is 5% by weight, and the content of sodium hexametaphosphate is 5% by weight.

[0046] Add the above-mentioned raw materials and water (the amount of water added is 10% by weight of the total weight of each raw material) into a stirrer for stirring and mixing to obtain a converter gunning slurry. The furnace was repaire...

Embodiment 2

[0048] This example is used to illustrate the preparation and application method of the gunning furnace refractory material provided by the present invention.

[0049] Based on the total weight of each raw material, the content of magnesia is 55% by weight (wherein, the weight ratio of magnesia with a particle diameter of 1-3mm and a particle diameter of 3-5mm is 0.9:1); the content of magnesium powder is 30% by weight (wherein, the weight ratio of particle diameter is 0.2-1mm and the magnesium powder of particle diameter<0.2mm is 0.9: 1); Aluminum oxide micropowder (particle diameter is≤1mm) content is 4% by weight, calcium oxide micropowder (particle The content is 6% by weight, and the content of sodium hexametaphosphate is 5% by weight.

[0050] Add the above-mentioned raw materials and water (the amount of water added is 10% by weight of the total weight of each raw material) into a stirrer for stirring and mixing to obtain a converter gunning slurry. The furnace was rep...

Embodiment 3

[0052] This example is used to illustrate the preparation and application method of the gunning furnace refractory material provided by the present invention.

[0053] Based on the total weight of each raw material, the content of magnesia is 45% by weight (wherein, the weight ratio of magnesia with a particle diameter of 1-3mm and a particle diameter of 3-5mm is 1.2:1); the content of magnesium powder is 40% by weight (wherein, the weight ratio of particle diameter is 0.2-1mm and the magnesium powder of particle diameter<0.2mm is 1.2: 1); Aluminum oxide micropowder (particle diameter is≤1mm) content is 5% by weight, calcium oxide micropowder (particle The content is 4% by weight, and the content of sodium hexametaphosphate is 6% by weight.

[0054] Add the above-mentioned raw materials and water (the amount of water added is 10% by weight of the total weight of each raw material) into a stirrer for stirring and mixing to obtain a converter gunning slurry. Carry out refurbish...

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Abstract

The invention discloses a fireproof material for a mending furnace as well as a preparation method and a using method thereof. The fireproof material for the mending furnace comprises magnesia, magnesium powder, aluminium oxide, calcium oxide and sodium hexametaphosphate, wherein the total weight of the fireproof material for the mending furnace is used as a reference, the total content of the magnesia and the magnesium powder accounts for 80-90 percent by weight; the content of the aluminium oxide accounts for 3-7 percent by weight; the content of the calcium oxide accounts for 3-7 percent by weight; the content of the sodium hexametaphosphate accounts for 3-7 percent; and the main components of the magnesia and the magnesium powder are MgO. The fireproof material for the mending furnace is high in adhesive ratio, good in stickiness, solidification and hardness, and low in resilience value during mending; and therefore, a mending layer formed by the fireproof material for the mending furnace is good in anti-erosion performance and long in service life.

Description

technical field [0001] The invention relates to a gunning furnace refractory material and a preparation method and application method thereof. Background technique [0002] In order to prolong the service life of the converter lining, the world's major industrial countries have taken various measures to reduce the damage rate of the converter lining. However, with the continuous development of iron and steel industry technology, the smelting intensity and frequency continue to increase, and the melting loss and slag erosion of refractory materials continue to increase, especially the erosion and erosion in the slag line area and high temperature area are relatively serious, resulting in uneven damage to the furnace lining. In the end, the furnace must be shut down and replaced as a whole. Therefore, repairing the damaged part of the furnace lining with refractory gunning material is one of the important measures to prolong the service life of the furnace lining, shorten the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 陈永梁新腾曾建华任毅杨森祥李桂军李青春李利刚何为李安林陈均
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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