Preparation method of fire-resistant engineering fiber

A technology of refractory engineering and refractory fiber cotton, which is applied in the direction of textiles and papermaking, paper machine, paper machine wet end, etc. It can solve the problems of poor dispersion, performance that cannot meet the individual requirements of customers, and low slag removal rate. Good dispersibility, reduced hot air drying time, and low slag content

Inactive Publication Date: 2019-05-17
湖北烁砺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of refractory engineering fibers includes steps such as chopping, slag removal, molding, and drying. The existing production process is usually to dry the slag after the fiber cotton is chopped. When the refractory engineering fibers produced by this process are used as raw materials The dispersion in water is not good, and the slag removal rate is not high, and the performance of the products produced by it cannot meet the individual requirements of customers

Method used

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  • Preparation method of fire-resistant engineering fiber
  • Preparation method of fire-resistant engineering fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 (1260 engineering fibers)

[0021] (1) Chopping: Send the filament refractory fiber cotton raw material into the chopping machine for chopping, and cut the fiber into short filaments of 8-60mm;

[0022] (2) Dispersion: transport the chopped short refractory fiber and water to the slurry tank, the weight ratio of the short refractory fiber and water is 3:1000, and obtain the slurry after fully dispersing;

[0023] (3) Circulating slag removal: Send the slurry in the slurry tank to the slag remover, separate the 212um slag balls in the slurry, and send the separated slag balls back to the slurry tank, the cycle time 60 minutes, the interval between each deslagging is 6 minutes, and then the slurry after deslagging is transported to the slurry storage tank;

[0024] (4) Forming: Send the slurry in the pulp storage tank to the high level tank, keep the water level of the high level tank, the slurry flows out from the discharge port of the high level tank, and nat...

Embodiment 2

[0026] Example 2 (high-purity engineering fiber)

[0027] (1) Chopped: Send the raw material of filament refractory fiber cotton into the chopping machine for chopping, and cut the fiber into short filaments of 8-60mm;

[0028] (2) Dispersion: transport the chopped refractory fiber and water to the slurry tank, the weight ratio of the refractory fiber and water is 1:100, and then fully disperse to obtain the slurry;

[0029] (3) Circulating slag removal: Send the slurry in the slurry tank to the slag remover, separate the 212um slag balls in the slurry, and send the separated slag balls back to the slurry tank, the cycle time 20 minutes, the interval between each deslagging is 8 minutes, and then the slurry after deslagging is transported to the slurry storage tank;

[0030] (4) Forming: Send the slurry in the pulp storage tank to the high level tank, keep the water level of the high level tank, the slurry flows out from the discharge port of the high level tank, and naturall...

Embodiment 3

[0032] Example 3 (1350 engineering fibers)

[0033] (1) Chopping: Send the filament refractory fiber cotton raw material into the chopping machine for chopping, and cut the fiber into short filaments of 8-60mm;

[0034] (2) Dispersion: transport the chopped refractory fiber and water to the slurry tank, the weight ratio of the refractory fiber and water is 1.5:1000, and then fully disperse to obtain the slurry;

[0035] (3) Circulating slag removal: Send the slurry in the slurry tank to the slag remover, separate the 212um slag balls in the slurry, and send the separated slag balls back to the slurry tank, the cycle time 40 minutes, the interval between each deslagging is 3 minutes, and then the slurry after deslagging is transported to the slurry storage tank;

[0036] (4) Forming: Send the slurry in the pulp storage tank to the high level tank, keep the water level of the high level tank, the slurry flows out from the discharge port of the high level tank, and naturally set...

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Abstract

The invention provides a preparation method of a fire-resistant engineering fiber. The preparation method includes the following steps of (1) short cutting; (2) dispersing; (3) circulation slag removing; (4) molding; and (5) drying. The preparation method of the fire-resistant engineering fiber has the advantages that 1, circulation slag removing is conducted through a slag separator, produced products have the low shot content, and the content of 212 [mu]m shots can reach 1% or below; 2, the fire-resistant fiber subjected to wet slag removal has good dispersibility, and product performance isstable; and 3, the thickness of a fiber wet billet is low and uniform by adopting long mesh molding, in this way, the drying time of hot air is reduced by 30% compared with traditional technologies,and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of heat-insulating fiber materials, in particular to a preparation method of fire-resistant engineering fibers. Background technique [0002] Aluminum silicate fiber, also known as refractory fiber, is a new type of lightweight refractory material. The material has light bulk density, high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity, good mechanical vibration resistance, and good heat insulation performance. Advantages, after special processing, it can be made into gaskets for automobile exhaust catalytic converters, high-temperature flue gas filter bags, and Millbord. [0003] Gaskets for automotive exhaust catalytic converters are made of selected refractory fiber cotton dispersed in water at a certain concentration, and then a certain proportion of flexible binder is added (some pads need to add some expansive materials), and are produced through the most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F1/00D21F5/00D01G1/04
Inventor 刘斌王洁方传军
Owner 湖北烁砺新材料科技有限公司
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