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High-density board taking expanded vermiculite as base material and preparation method of high-density board

A technology of expanded vermiculite and high-density board, which is applied in the field of inorganic thermal insulation materials, can solve the problems of long production cycle, poor processability, and low efficiency, and achieve excellent anti-seepage performance and good processability

Pending Publication Date: 2021-04-09
LUYANG ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During preparation, the mixed material needs to be poured into a mold for pressing, and then cured at a certain temperature in a drying room. A mold is required for curing, which leads to long production cycle, low efficiency and high cost
During the production or use of high-density vermiculite board, it is easy to drop slag and has poor processability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The present invention also provides a kind of above-mentioned expanded vermiculite is the preparation method of the high-density board of base material, comprises the following steps:

[0035] A) mixing expanded vermiculite, flocculant, inorganic fiber, inorganic binder and hydrophobic agent in water to obtain a slurry with a concentration of 2 to 10 wt %;

[0036] B) adding a filter aid to the slurry obtained in the step A), then forming the flocculated slurry into a wet body, and drying to obtain a high-density board with expanded vermiculite as the base material.

[0037] In the present invention, the type, source and amount of the expanded vermiculite, flocculant, inorganic fiber, inorganic binder and hydrophobic agent are the same as those of the expanded vermiculite, flocculant, inorganic fiber, inorganic binder and The type, source and dosage of the water-repellent are the same and will not be repeated here.

[0038] In the present invention, the mass concentrat...

Embodiment 1

[0046] Add 400kg of expanded vermiculite (particle size 1mm) into water, add 60kg of flocculant, then add 300kg of standard ceramic fiber blown cotton, 200kg of silica sol with a concentration of 30%, and 7kg of water-repellent agent, and mix well to make a concentration of 5%. slurry.

[0047] Add 38kg of cationic starch to the slurry to aid in filtering, so that the materials can be flocculated together to make the water clear.

[0048] The flocculated slurry is drawn into shape by fourdrinier, and then pressed to the corresponding thickness and density by a press, and transported to the drying equipment for drying. After drying, the product is processed and produced.

[0049] The bulk density of the high-density board with expanded vermiculite as the base material after production is 950kg / m 3 . The compressive strength is 8MPa, and the temperature resistance is 1100°C. After testing, the high-density board with expanded vermiculite as the base material meets the requirem...

Embodiment 2

[0051] Add 200kg (particle size 0.1mm) and 150kg (particle size 2mm) of expanded vermiculite into water, add 50kg flocculant, then add 200kg standard ceramic fiber blown cotton, 150kg high-purity ceramic fiber cotton, 30% concentration of silica sol 230kg, 6kg of water-repellent agent, mix evenly, make the slurry of concentration 3%.

[0052] Add 40kg of cationic starch to the slurry for filter aid, so that the materials are flocculated together and the water is clear.

[0053] The flocculated slurry is drawn into shape by fourdrinier, and then pressed to the corresponding thickness and density by a press, and transported to the drying equipment for drying. After drying, the product is processed and produced.

[0054] The bulk density of the high-density board with expanded vermiculite as the base material after production is 1100kg / m 3 . The compressive strength is 9MPa, and the temperature resistance is 1100°C. After testing, the high-density board with expanded vermiculit...

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Abstract

The invention provides a high-density board taking expanded vermiculite as a base material. The high-density board is prepared from the following preparation raw materials in parts by weight: 30-50 parts of expanded vermiculite, 5-10 parts of a flocculating agent, 20-40 parts of inorganic fiber, 5-10 parts of an inorganic binding agent, 0.5-1 part of a water repellent and 1-12 parts of a filter aid, and the inorganic fiber is one or more of a blowing ceramic fiber, a thread throwing ceramic fiber and a soluble ceramic fiber. Expanded vermiculite is used as a base material, the inorganic fiber is added for reinforcement, slag falling is avoided, the machinability is good, the expanded vermiculite is used in the fields of heat insulation, heat preservation, fire prevention and the like, can tolerate the temperature of 1100 DEG C, has the compressive strength reaching 10 Mpa, has excellent impermeability, can replace impermeable materials and traditional vermiculite plates in the field of aluminum electrolysis cell impermeability to be used as impermeable layers, and meets industrial standard requirements. The invention further provides a preparation method of the high-density board taking the expanded vermiculite as the base material.

Description

technical field [0001] The invention belongs to the technical field of inorganic thermal insulation materials, and in particular relates to a high-density board with expanded vermiculite as a base material and a preparation method thereof. Background technique [0002] Ceramic fiberboard has the advantages of light weight and low thermal conductivity, and is widely used in the backing insulation of various kilns, but because of its large porosity, it cannot be used in the field of sealing and anti-seepage. [0003] Expanded vermiculite has a porous layered structure and has the advantages of good thermal insulation effect, low thermal conductivity, low bulk density and low price. The expanded vermiculite board is made of expanded vermiculite as the main raw material, with a certain proportion of adhesive and curing agent, and is made through mold pressing and other processes. [0004] Existing conventional vermiculite boards can be prepared according to the following proces...

Claims

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Application Information

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IPC IPC(8): C04B28/24C04B14/20C04B14/38
CPCC04B28/24C04B14/204C04B14/46C04B14/4643C04B14/465C04B2201/50C04B2201/20C04B2103/0068C04B24/42C04B24/38
Inventor 唐锋毕四龙刘超郭金胜宋传涛
Owner LUYANG ENERGY SAVING MATERIALS CO LTD