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Inorganic fiber using fly ash as main raw material and manufacturing method thereof

A technology of inorganic fibers and main raw materials, applied in the field of inorganic fibers and their manufacturing, to achieve the effects of high acidity coefficient, good water resistance and durability, and low thermal conductivity

Active Publication Date: 2015-10-14
ZHEJIANG XUANMING NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned difficulties in the process of preparing fibers from fly ash and other wastes and the above-mentioned melt properties: viscosity, surface tension, crystallization performance, rheology and hardening speed can be attributed to the above-mentioned melt properties and melt composition. Influence relationship is not yet determined

Method used

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  • Inorganic fiber using fly ash as main raw material and manufacturing method thereof
  • Inorganic fiber using fly ash as main raw material and manufacturing method thereof
  • Inorganic fiber using fly ash as main raw material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~9

[0086] Preparation of fly ash block:

[0087] See Table 1 and Table 2 for the composition and characteristics of the fly ash raw materials and flux used in Examples 1 to 9, and see Table 3 for the raw materials used in each embodiment and their proportions and technical parameters. The loss on ignition at 900°C is the test value after 1 hour of ignition.

[0088] The cement used in Examples 1-9 is ordinary Portland cement, wherein Example 5 is P·O42.5, and the remaining examples are P·O32.5R.

[0089] The grade of polyvinyl alcohol used in Examples 1-9 is 1799, and the degree of alcoholysis is 99.96%. The mass percentage concentration of polyvinyl alcohol PVA in its aqueous solution is shown in Table 3.

[0090] See Table 4 for the mass percentage composition and bulk density of the fly ash blocks obtained in Examples 1 to 9 after being cured for 4 days under the condition of sunshade and rain protection. Wherein the bulk density of the block of embodiment 3 is the test valu...

Embodiment 1～9

[0093] Table 2 Example 1-9 Flux mass percent composition and particle size

[0094]

[0095] Table 3 Examples 1 to 9 Block Proportion Mass Percentage and Technical Parameters of Raw Materials

[0096]

[0097] *A mixture of F8 and F4 with a mass ratio of 8:5.

[0098] Table 4 The mass percent composition and bulk density of the fly ash blocks of Examples 1 to 9

[0099]

Embodiment 10～19

[0101] Preparation of inorganic fibers:

[0102] See Table 3 and Table 4 for the mass percent composition and characteristics of the fly ash blocks used in Examples 10-19.

[0103] The mass percent composition and characteristic size of flux and coke used in Examples 10-19 are shown in Table 5, wherein the heat value of coke is 7623kcal / kg.

[0104] Fiber-forming technical parameters of Examples 10 to 14: four-roller centrifuge, the line speed of the lowest roll is 27.3m / s, and the line speed of the highest roll is 5.5 times of the line speed of the lowest roll.

[0105] Fiber-forming technical parameters of Examples 15-19: four-roller centrifuge, the line speed of the lowest roll is 33m / s, and the line speed of the highest roll is 4.6 times of the line speed of the lowest roll.

[0106] See Table 6 for the formula ratio of fly ash block, flux and coke used in Examples 10-19, the nature and amount of hot air, the melting time and the residence time after the melt is released ...

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Abstract

The invention discloses an inorganic fiber with coal ash as a main raw material and a manufacturing method of the inorganic fiber. A residue obtained after the inorganic fiber taking the coal ash as the main raw material is fired at the temperature of 550 DEG C for 30min contains the following components in percentage by weight: 39.0-48.0% of SiO2, 10.0-20.0% of Al2O3, 20.0-28.0% of CaO, 2.5-10.5% of Fe2O3, 3.5-10.5% of MgO, 0.2-2% of Na2O, 0.2-2.0% of K2O and 0.2-2.5% of TiO2. The inorganic fiber disclosed by the invention has favorable water resistance and durability, a relatively high acidity coefficient, relatively low shot content, a relatively small fiber diameter, very high tensile strength and a relatively low heat conductivity coefficient, can be used as a sound absorption material, a thermal insulation material and the like and can be used for completely replacing a rock wool board thermal insulation material made of a basalt fiber in the prior art.

Description

technical field [0001] The invention relates to an inorganic fiber manufactured by using industrial solid waste fly ash as the main raw material and an industrial production method for manufacturing the inorganic fiber. More specifically, it relates to an inorganic fiber with specific application properties and a manufacturing method thereof. technical background [0002] Fly ash generally refers to the solid residue after coal combustion. After the coal is burned in the furnace, the unburned residue has two forms: slag and fly ash (Fly Ash): the solid particle residue discharged with the flue gas is called fly ash, and the particle size discharged from the bottom of the furnace is larger or in the form of fly ash. The lumpy solid residue is called cinder or bottom cinder. In addition to the spontaneous combustion of raw coal and coal gangue, the main sources of fly ash are coal-fired furnaces in thermal power plants that use coal as energy, coal-fired furnaces in large-sc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C13/06C03B37/00C04B28/04
Inventor 李鹏吴秋芳陈国建王汉斌朱鸣航马新胜
Owner ZHEJIANG XUANMING NEW MATERIALS
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