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Universal siliceous castable

A castable and silicon technology, which is applied in the field of general silicon castables, can solve problems such as cracking or peeling of the construction body, difficulty in use, large volume changes, etc., and achieve the effect of improving the strength at room temperature and increasing the sinterability

Active Publication Date: 2015-10-28
郑州市科源耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the main crystal item is quartz when silica is used to directly produce siliceous castables, and the volume change caused by the crystal transformation of quartz at about 700°C is very large, which is easy to cause cracking or peeling of the construction body, so the siliceous castables produced with silica are only It is suitable for the environment where the temperature is lower than 600°C, and it is difficult to use under high temperature conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The general-purpose siliceous castable material described in the present invention is prepared by the following proportions, and the raw materials used are calculated by weight: 60 parts of waste silica brick granules, of which: 30 parts of waste silica brick granules with a particle size of 5-8mm, 3mm< 10 parts of waste silica brick granules with particle size <5mm, 10 parts of waste silica brick granules with 1mm≤particle size≤3mm, 10 parts of waste silica brick granules with 0.088mm<particle size<1mm;

[0030] 29 parts of waste silica brick fine powder with particle size ≤0.088mm;

[0031] 3 parts of silicon dioxide micropowder;

[0032] Portland cement 8 parts;

[0033] The high-efficiency water reducer is added at 0.10% of the total weight of the material, including: sodium tripolyphosphate 0.05%, naphthalene sulfonate water reducer 0.05%.

[0034] The siliceous castable prepared with this ratio is a general-purpose castable, which is suitable for kilns using sil...

Embodiment 2

[0036] The general-purpose siliceous castable according to the present invention is formulated with the following proportions, and the raw materials used are calculated in parts by weight: 60 parts of waste silica brick granules, of which: 30 parts of waste silica brick granules with a particle size of 5-8mm, 3mm< 10 parts of waste silica brick granules with particle size < 5 mm, 10 parts of waste silica brick granules with 1 mm ≤ particle size ≤ 3 mm, 10 parts of waste silica brick granules with 00.88 mm < particle size < 1 mm;

[0037] 29 parts of quartz fine powder with particle size ≤0.088mm;

[0038] 3 parts of silicon dioxide micropowder;

[0039] Portland cement 8 parts;

[0040] The high-efficiency water reducer is added at 0.15% of the total weight of the material, including: sodium tripolyphosphate 0.05%, naphthalene sulfonate water reducer 0.1%.

[0041] The siliceous castable prepared with this ratio is a general-purpose castable, which is suitable for kilns usin...

Embodiment 3

[0043] The general-purpose siliceous castable material of the present invention is prepared by the following proportions, and the raw materials used are calculated by weight: 60 parts of waste silica brick granules, wherein: 40 parts of waste silica brick granules with 3mm

[0044] 30 parts of quartz fine powder with particle size ≤0.088mm;

[0045] 8 parts of silicon dioxide micropowder;

[0046] Portland cement 2 parts;

[0047] The high-efficiency water reducer is added at 0.15% of the total weight of the material, including: sodium tripolyphosphate 0.05%, naphthalene sulfonate water reducer 0.1%.

[0048] The siliceous castable prepared with this ratio is a general-purpose castable, which is suitable for kilns using silica bricks at home and abroad, or can partly replace silica bricks or be used in conjunction with s...

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Abstract

The invention discloses universal siliceous castable prepared from raw materials including waste silica bricks, quartz powder, silicon dioxide micro powder, Portland cement, high-alumina cement and efficient water reducing agents according to a certain ratio. Waste silica brick particles are used as skeletal materials of the siliceous castable. Main mineral phases of a construction body where pouring is conducted include the tridymite phase and the cristobalite phase. Cracking or stripping caused by large crystal transfer can not be generated. The silicon dioxide micro powder which is used as reinforcing agents and agglomerant as well is used, and therefore the normal temperature strength is improved, and the high temperature sintering performance is improved as well. The Portland cement is adopted as a binding agent, and conversion of residual quartz into tridymite and cristobalite can be promoted under the high temperature. The castable can be directly used under the high temperature after being constructed, the use performance is close to the performance of silica bricks, the overall performance of the castable is superior to that of a construction body spliced and built by small bricks, large-size siliceous cast-in-place construction bodies or prefabricated pieces good in overall performance can be manufactured, and great breakthrough is achieved on the aspect of siliceous castable.

Description

technical field [0001] The invention relates to an unshaped refractory material, in particular to a general silicon casting material. Background technique [0002] In the 1990s, the development of unshaped refractories in my country was very rapid, but the application of silicon unshaped refractories was limited to some special parts, such as: fused silica nozzles, silicon dry ramming materials for induction furnaces, etc. wait. Since the main crystal item is quartz when silica is used to directly produce siliceous castables, and the volume change caused by the crystal transformation of quartz at about 700°C is very large, which is easy to cause cracking or peeling of the construction body, so the siliceous castables produced with silica are only It is suitable for the use environment where the temperature is lower than 600°C, and it is difficult to use under high temperature conditions. Contents of the invention [0003] The object of the present invention is to provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 康华荣王国选董胜英王春波牛伟海王有权孙阳阳孙福安牛全义
Owner 郑州市科源耐火材料有限公司
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