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High-strength and low-rebound refractory spray coating and preparation method thereof

A low-rebound, high-strength technology, applied in the field of refractory materials, can solve the problems of high rebound rate and low strength, and achieve the effects of low rebound rate, good construction performance, and improved uniformity and activity

Active Publication Date: 2020-08-07
HENAN HONGDA FURNACE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problems of low strength and high rebound rate of the existing lightweight spray paint, the present invention provides a high-strength, low rebound fire-resistant spray paint and its preparation method

Method used

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  • High-strength and low-rebound refractory spray coating and preparation method thereof
  • High-strength and low-rebound refractory spray coating and preparation method thereof
  • High-strength and low-rebound refractory spray coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high-strength, low-rebound fire-resistant spray coating, using the following raw materials and weight percentages: 35% coke gemstones, 20% porous mullite, 8% expanded vermiculite, 5% floating beads, 32% composite binder .

[0023] Burnt Gem Al 2 o 3 Content 40%, bulk density 2.32g / cm 3 , particle size 3 ~ 1.2mm.

[0024] Porous mullite Al 2 o 3 Content 40%, bulk density 1.2g / cm 3 , Particle size 1.2 ~ 0.3mm.

[0025] Expanded vermiculite is calcined at 850-880°C, with a bulk density of 160kg / m 3 ,Al 2 o 3 The content is 42%, and the particle size is less than 0.3mm.

[0026] Bead Al 2 o 3 Content 40%, SiO 2 Content 55%, Fe 2 o 3 Content 2.5%, R 2 The O content is 1.2%, and the particle size is less than 200 μm.

[0027] The composite binder uses 20% Portland cement, 30% CA-60 aluminate cement, 20% CA-80 aluminate cement, and 12% active SiO 2 Micropowder, 15% of 200 mesh raw clay powder, 1.5% of NaOH, and 1.5% of triethanolamine are prepared by co-gri...

Embodiment 2

[0036] A high-strength, low-rebound fire-resistant spray coating, using the following raw materials and weight percentages: 30% coke gemstones, 25% porous mullite, 7% expanded vermiculite, 6% floating beads, 32% composite binder .

[0037] Burnt Gem Al 2 o 3 Content 36%, bulk density 2.35g / cm 3 , particle size 3 ~ 1.2mm.

[0038] Porous mullite Al 2 o 3 Content 36%, bulk density 1.15g / cm 3 , Particle size 1.2 ~ 0.3mm.

[0039] Expanded vermiculite is calcined at 860-880°C, with a bulk density of 120kg / m 3 ,Al 2 o 3 42%, the particle size is less than 0.3mm.

[0040] Bead Al 2 o 3 Content 35%, SiO 2 Content 60%, Fe 2 o 3 Content 3.5%, R 2 The O content is 1.2%, and the particle size is less than 200 μm.

[0041] The composite binder uses 25% Portland cement, 30% CA-60 aluminate cement, 20% CA-80 aluminate cement, and 8% active SiO 2 Micropowder, 15% of 200 mesh raw pottery clay powder, 1.0% of NaOH, 1.0% of triethanolamine, was prepared by co-grinding with a h...

Embodiment 3

[0050] A high-strength, low-rebound fire-resistant spray coating, using the following raw materials and weight percentages: 33% coke gemstones, 23% porous mullite, 8% expanded vermiculite, 6% floating beads, 30% composite binder .

[0051] Burnt Gem Al 2 o 3 Content 38%, bulk density 2.31g / cm 3 , particle size 3 ~ 1.2mm.

[0052] Porous mullite Al 2 o 3 Content 38%, bulk density 1.18g / cm 3 , Particle size 1.2 ~ 0.3mm.

[0053] Expanded vermiculite is calcined at 860-880°C, with a bulk density of 130kg / m 3 ,Al 2 o 3 The content is 41%, and the particle size is less than 0.3mm.

[0054] Bead Al 2 o 3 Content 36%, SiO 2 Content 57%, Fe 2 o 3 Content 2.0%, R 2 The O content is 1.0%, and the particle size is less than 200 μm.

[0055] The composite binder uses 22% Portland cement, 31.6% CA-60 aluminate cement, 21% CA-80 aluminate cement, and 8% active SiO 2 Micropowder, 15% of 200 mesh raw pottery clay powder, 1.2% of NaOH, 1.2% of triethanolamine, was prepared by...

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Abstract

The invention discloses a high-strength and low-rebound refractory spray coating and a preparation method thereof, and relates to the technical field of refractory materials. The problems of low strength and high rebound rate of an existing light spray coating are solved. 30-35% of flint clay, 20-25% of porous mullite, 6-8% of expanded vermiculite, 5-6% of floating beads and 28.5-32% of a composite binding agent are adopted. The preparation method comprises the following steps: firstly, preparing a composite binding agent from Portland cement, CA-60 aluminate cement, CA-80 aluminate cement, active SiO2 micro-powder, 200-mesh raw pottery clay powder, NaOH and triethanolamine by adopting a horizontal dry ball mill; then mixing the composite binding agent with expanded vermiculite and floating beads by adopting a planetary stirrer; and finally, adding flint clay and porous mullite, and then performing planetary stirring to obtain the finished product. The compactness of the spray coatingis effectively enhanced, the adhesion and the sintering property of the whole binding agent are good, the strength of the spray coating is high, and the rebound rate is low; and during preparation, the horizontal dry ball mill and the planetary stirrer are used for mixing in three steps, so the uniformity and activity of the spray coating are high.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a high-strength, low-rebound refractory spray coating and a preparation method thereof. Background technique [0002] Refractory spray coating is an unshaped refractory material constructed by mechanical spraying method using pneumatic tools. It is a bulk material made of clay clinker as raw material. Refractory spray coating is an important branch of unshaped refractory material. It has good high temperature performance and Construction performance, when applied to high-temperature industrial furnace lining, the construction efficiency is high, and the construction time can be effectively shortened. It is widely used in high-temperature industrial furnace refractory linings such as iron and steel metallurgy and building materials. [0003] Spray coatings are generally composed of aggregates, powders, binders and admixtures, and are constructed by dry or semi-dry met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B35/62222C04B2235/349C04B2235/3463C04B2235/36C04B2235/3427C04B2235/3222C04B2235/3418C04B2235/3201C04B2235/77C04B2235/9615C04B2235/96
Inventor 何贯通郭宏相李放万俊张群英石立光
Owner HENAN HONGDA FURNACE IND
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