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A-60 rock wool for ship

A technology for rock wool and marine use, applied in the field of rock wool among rock wool and mineral fibers, it can solve the problems of easy inhalation of fibers into the lungs, affect physical health, and no way of knowing, so as to reduce construction costs and reduce the rate of change of heating lines. , the effect of saving foreign exchange

Inactive Publication Date: 2005-09-07
宁波环宇耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] According to the provisions of the International Maritime Organization's Convention on Fire Protection at Sea, for the thermal insulation and heat insulation materials used in the ship's A-60 fire-resistant separation area, its fire-resistant structure must meet the requirements of the marine A-60 fire-resistant grade, that is, it needs to pass the International Maritime Organization. The temperature rise equation specified in IMO.A754(18) lasts for 1 hour for the fire-resistant separation test, and its maximum temperature requirement reaches 945°C, which cannot be achieved for ordinary rock wool produced in China; currently, it is used in A-60 grade in domestic shipbuilding industry The material of the refractory partition structure is generally made of aluminum silicate fiber, because it can meet the requirements of high temperature resistance and good heat insulation performance at high temperature; but the production of aluminum silicate fiber is melted by electric arc furnace and blown by compressed air. Technology, the product is characterized by high density and fine fiber diameter, especially the existence of fibers with a diameter of less than 1 μm. Such ultra-fine fibers are easily inhaled into the lungs and affect the health of the body. Therefore, the use of aluminum silicate fibers has been stopped in European Community countries. , and use special rock wool as the A-60 class refractory partition structure material; because the production process and formula of this rock wool have not been disclosed, and there is no way to know

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A grade A-60 rock wool for marine use of the present invention, its main raw material is basalt, adding a certain proportion of alumina powder and other inorganic mineral raw materials, after mixing, melting in an induction furnace, and spinning with a four-roller centrifuge to form rock wool Cotton fiber;

[0025] Its raw material ratio is as follows in weight percentage based on total amount:

[0026] Basalt 77%

[0027] Aluminum oxide powder 20%

[0028] Dolomite 3%

[0029] Make the chemical composition (by weight percentage) of its composition of rock wool as follows:

[0030] SiO 2 41%

[0031] Al 2 o 3 34%

[0032] Fe 2 o 3 (Contains FeO) 7%

[0033] CaO+MgO 7%

[0034] the other 11%

[0035] The acidity coefficient is 10.5.

Embodiment 2

[0037] Change the proportioning of raw materials in embodiment 1, specifically:

[0038] Basalt 70%

[0039] Aluminum oxide powder 25%

[0040] Dolomite 5%

[0041] Make the chemical composition (by weight percentage) of its composition of rock wool as follows:

[0042] SiO 2 38%

[0043] Al 2 o 3 38%

[0044] Fe 2 o 3 (Contains FeO) 6.5%

[0045] CaO+MgO 8%

[0046] Other 9.5%

[0047] The acidity coefficient is 9.5.

Embodiment 3

[0049] Change the proportioning of raw materials in embodiment 1, specifically:

[0050] Basalt 85%

[0051] Aluminum oxide powder 15%

[0052] Dolomite 0%

[0053] Make the chemical composition (by weight percentage) of its composition of rock wool as follows:

[0054] SiO 2 45%

[0055] Al 2 o 3 30%

[0056] Fe 2 o 3 (Contains FeO) 8%

[0057] CaO+MgO 5%

[0058] other 12%

[0059] The acidity factor is 8.

[0060] In Examples 1-3, the basalt in the raw material was replaced by diabase, and the proportion was unchanged, and the results were the same.

[0061] In Examples 1-3, the melting of the raw material in the induction furnace is changed to melting in the resistance furnace, and the effect remains unchanged.

[0062] Part of the alumina powder can also be replaced by burnt gemstones in the raw materials, but the substitution amount should not exceed 50% of the total amount of alumina powder required, and the substitution ratio is 1:1.6-...

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Abstract

Disclosed is an A-60 rock wool for ships, wherein the principal raw materials include basalt or diabase, a predetermined proportion of aluminum oxide powder and other inorganic raw mineral materials. Its preparation consists of melting in induction furnaces or electrical resistance furnaces, and centrifuging to obtain the rock wool fiber whose chemical constituents (by weight percentage) include SiO2 38-45%, Al2O3 30-38%, Fe2O3 (containing FeO) 6.5-8%, CaO+MgO 5-8%, other constituents and 9.5-12%.

Description

technical field [0001] The invention relates to the technical field of rock wool in mineral fibers, in particular to rock wool meeting the requirements of A-60 fire resistance grade for ships. Background technique [0002] According to the provisions of the International Maritime Organization's Convention on Fire Protection at Sea, for the thermal insulation and heat insulation materials used in the ship's A-60 fire-resistant separation area, its fire-resistant structure must meet the requirements of the marine A-60 fire-resistant grade, that is, it needs to pass the International Maritime Organization. The temperature rise equation specified in IMO.A754(18) lasts for 1 hour for the fire-resistant separation test, and its maximum temperature requirement reaches 945°C, which cannot be achieved for ordinary rock wool produced in China; currently, it is used in A-60 grade in domestic shipbuilding industry The material of the refractory partition structure is generally made of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/14C04B35/66
CPCC03C3/062C03C3/087C03C13/06
Inventor 胡国冲
Owner 宁波环宇耐火材料有限公司
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