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Refractory casting material

A technology of refractory castables and aggregates, applied in the field of refractory materials, can solve problems such as erosion reaction and refractory material damage, and achieve the effects of reducing porosity, improving corrosion resistance, and high strength

Inactive Publication Date: 2003-10-22
宜兴天霸非金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al 2 o 3 ·SiO2 2 series refractories because the melt contains a large amount of Na + 、K + , Fe 2+ , Ca 2+ Such as metal ions, at this high temperature, it is easy to corrode the refractory material, produce low melting material and damage the refractory material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, refractory castable, component ratio is: (weight percent %)

[0015] First grade bauxite

[0016] 5-3mm 26 parts

[0017] 3-1mm 23 parts

[0018] 1-0mm 19 parts

[0019] <0.088mm 18 parts

[0020] <0.088mm active magnesium oxide 3 parts

[0021] <0.088mm sintered grade magnesia 5 parts

[0022] Silica powder 6 parts plus:

[0023] Sodium tripolyphosphate 0.2 parts Among them, activated magnesium oxide is lightly burned MgO after magnesite was calcined at 800°C-850°C.

Embodiment 2

[0024] Embodiment 2, refractory castable, component ratio is: (% by weight)

[0025] First grade bauxite

[0026] 5-3mm 25 parts

[0027] 3-1mm 22 parts

[0028] 1-0mm 18 parts

[0029] <0.088mm 20 parts

[0030] <0.088mm active magnesium oxide 3 parts

[0031] <0.088mm sintered primary magnesia 6 parts

[0032] Silica powder 6 parts plus:

[0033] Sodium tripolyphosphate 0.25 parts Among them, active magnesium oxide is lightly burned MgO after magnesite was calcined at 800°C-850°C.

Embodiment 3

[0034] Embodiment 3, refractory castable, component ratio is: (weight percent %)

[0035] First grade bauxite

[0036] 5-3mm 26 parts

[0037] 3-1mm 24 parts

[0038] 1-0mm 20 parts

[0039] <0.088mm 17 parts

[0040] <0.088mm active magnesium oxide 2 parts

[0041] <0.088mm sintered primary magnesia 6 parts

[0042] Silica powder 5 parts plus:

[0043] Sodium tripolyphosphate 0.3 parts Among them, activated magnesium oxide is lightly burned MgO after magnesite was calcined at 800°C-850°C.

[0044] The performance parameters of the refractory castable made of the above proportioning combination are as follows:

[0045] Bulk density: 2.6-2.7g / cm 3

[0046] Compressive strength (1350℃×3h): ≥70Mpa

[0047] Line change after burning: (1450℃×3h): 0--+0.3%

[0048] Refractoriness: ≥1790℃

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Abstract

The present invention relates to a fire-resistant pouring material, its composition includes 65-70% of first-grade alumina aggregate whose grain size is less than 5 mm, 16-20% of first-grade alumina powder material whose grain size is less than 0.088 mm, 2-3% of active magnesium oxide whose grain size is less than 0.088 mm, 5-6% of sintered first-grade magnesite clinkes whose grain size is less than 0.088 mm, 5-6% of silicon dioxide micropowder, besides, 0.15-0.3% of sodium polyphosphate salt is added. Said invention utilizes the addition of active magnesium oxide in Al2O3.SiO2 series refractory material and has no cement dispersing agent so as to make the formed pouring material have high strength, good antioxidation property, good resistance of corrosion of molten refuse and good thermal stability.

Description

technical field [0001] The invention relates to a refractory material, in particular to an erosion-resistant and oxidation-resistant refractory castable suitable for garbage incinerators. technical background [0002] The waste melting furnace uses 1300℃-1600℃ to melt garbage ash. The furnace is a high-temperature zone, and the burner method of using heavy oil and other petrochemical fuels makes the furnace present a strong oxidizing atmosphere. Al 2 o 3 ·SiO2 2 series refractories because the melt contains a large amount of Na + 、K + , Fe 2+ , Ca 2+ Such as metal ions, at this high temperature, it is very easy to have an erosion reaction with the refractory material, and produce low-melting material to damage the refractory material. Contents of the invention [0003] The present invention just in order to overcome above-mentioned deficiency, provides a kind of in Al 2 o 3 ·SiO2 2 It is an improved corrosion-resistant and anti-oxidation refractory castable based...

Claims

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Application Information

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IPC IPC(8): C04B35/18C04B35/66
Inventor 吴国强钱军峰
Owner 宜兴天霸非金属材料有限公司
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