Fire-resistant gravity flow pouring material and method for making same

A castable and refractory technology, applied in the field of refractory castables, can solve the problems of increased cost, poor wear resistance, increased porosity, etc., and achieve the effects of increasing self-flow rate, reducing cost and high density

Inactive Publication Date: 2008-03-12
WUHAN UNIV OF SCI & TECH
View PDF1 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adjustment of particle gradation has no novelty and cannot significantly change the performance of self-flowing castables, and the addition of ultra-fine powder and high-efficiency dispersants increases the cost of self-flowing castables; increasing the amount of water often leads to increased porosity of self-flowing castables 1. The product is easy to crack, low in strength and poor in wear resistance during baking. For example, "self-flowing castable refractory" (CN96116065.9) is composed of fused brown corundum coarse particles and fine powder, silicon carbide coarse particles, and synthetic magnesium aluminum spinel powder , superfine silica powder, and high alumina cement are blended into the main material in a certain proportion, an

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1: A method for preparing refractory self-flowing castable

[0014] Combine 53~55wt% alumina particles, 16~20wt% fine alumina powder, 5~8wt% fine corundum powder, 5~10wt% fused ceramsite sand, 3~4wt% pure calcium aluminate cement , 2~3wt% of silicon powder, 8~10wt% of α-Al 2 O 3 Micropowder and 0.10-0.13wt% of water reducing agent are mixed, and the mixture is uniformly stirred.

[0015] Among them: fused ceramsite sand is spherical particles, Al 2 O 3 78.53wt%, Fe 2 O 3 1.83wt%, the particle size is 2~0.6mm; the Al of alumina particles 2 O 3 The content is 88~89wt%, the particle size is 10~0.088mm, the Al of alumina fine powder 2 O 3 The content is 88~89wt%, the particle size is less than 0.088mm; the Al of corundum fine powder 2 O 3 The content is 94~95wt%, the particle size is less than 0.088mm; the specific surface area of ​​pure calcium aluminate cement is ≥390cm 2 / g, refractoriness ≥1650℃; silicon powder SiO 2 ≥92wt%, Al 2 O 3 ≤1.5wt%, Fe 2 O 3 ≤2.0wt%, ignit...

Example Embodiment

[0017] Example 2: A method for preparing refractory self-flowing castable

[0018] Combine 43~45wt% of special grade alumina particles, 6~9wt% of fine alumina powder, 14~15wt% of corundum fine powder, 18~20wt% of fused ceramsite sand, 4~5wt% of pure alumina Calcium cement, 3~4wt% silica powder, 6~7wt% α-Al 2 O 3 It is prepared by mixing micropowder and 0.15-0.16% by weight of water reducing agent and stirring uniformly.

[0019] Among them: fused ceramsite sand is spherical particles, Al 2 O 3 78.53wt%, Fe 2 O 3 1.83wt%, the particle size is 2~0.6mm; the Al of alumina particles 2 O 3 The content is 78~84wt%, the particle size is 10~0.088mm, the Al of alumina fine powder 2 O 3 The content is 87~88wt%, the particle size is less than 0.088mm; the Al of corundum fine powder 2 O 3The content is 97~98wt%, the particle size is less than 0.088mm; the specific surface area of ​​pure calcium aluminate cement is ≥390cm 2 / g, refractoriness ≥1650℃; silicon powder SiO 2 ≥92wt%, Al 2 O 3 ≤1.5wt...

Example Embodiment

[0021] Example 3: A method for preparing refractory self-flowing castable

[0022] Combine 48-50wt% special grade alumina particles, 9-10wt% special grade alumina fine powder, 8-9wt% fine corundum powder, 14-16wt% fused ceramsite sand, 8-10wt% pure alumina Calcium cement, 5~6wt% silica powder, 3~5wt% α-Al 2 O 3 Micropowder and 0.13-0.14wt% water reducing agent are mixed, and the mixture is uniformly stirred.

[0023] Among them: fused ceramsite sand is spherical particles, Al 2 O 3 78.53wt%, Fe 2 O 3 1.83wt%, the particle size is 2~0.6mm; the Al of alumina particles 2 O 3 The content is 86~88wt%, the particle size is 10~0.088mm, the Al of alumina fine powder 2 O 3 The content is 86~88wt%, the particle size is less than 0.088mm; the Al of corundum fine powder 2 O 3 The content is 96~98wt%, the particle size is less than 0.088mm; the specific surface area of ​​pure calcium aluminate cement is ≥390cm 2 / g, refractoriness ≥1650℃; silicon powder SiO 2 ≥92wt%, Al 2 O 3 ≤1.5wt%, Fe 2 O 3...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Refractorinessaaaaaaaaaa
Login to view more

Abstract

The present invention relates to a preparation method for a fireproof self-flow pouring material. The technical scheme in the present invention is that: the fireproof self-flow pouring material is mixed and milled by the following components with the weight ratio that are: 35-55wt percent of bauxite grain, 5-20wt percent of bauxite powder, 5-25wt percent of corundum powder, 5-30wt percent of electrical-melting sand grain, 2-10wt percent of pure calcium aluminate cement, 2-6wt percent of silicon powder, 2-10wt percent of alpha -Al2O3 powder, 0.1-0.2wt percent of water reducer and so on. The fireproof and self-pouring material prepared by the present invention is characterized in non-segregation, good fluidity, easy to be constructed, higher density, better intension and much lower cost and so on. The present invention is widely adaptable to be used in the heat stove bushing including a heat stove bushing, steel enveloping persistent level and middle enveloping level and so on.

Description

1. Technical field [0001] The invention belongs to the technical field of refractory castables. In particular, it relates to a refractory self-flowing castable and a preparation method thereof. 2. Background technology [0002] Self-flow castable (Self-flow Castable) refers to low cement, ultra-low cement or cement-free refractory castables characterized by their fluidity after mixing, low cement or ultra-low cement refractory castables with this fluidity do not need It can flow and degas by applying external force without obvious segregation. Due to the good flow characteristics of self-flowing castables, it has attracted people's attention in recent years. It can be filled only by its own gravity without vibration, so it has more advantages than low-cement castables in many occasions. Self-flowing castables can be used in places where it is difficult to apply vibration or even if vibration is applied, it is difficult to make the vibrating castable flow and fill, such as ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B35/66C04B7/32C04B14/04C04B14/30
Inventor 李远兵覃显鹏李亚伟赵雷雷中兴金胜利李淑静
Owner WUHAN UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products