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Aluminum hydroxide dilute phase fluidization roasting furnace amorphous refractory material furnace lining

A technology for fluidized roasting and refractory materials, applied in the field of inorganic non-metallic materials, can solve problems such as the inability to solve the problem of lining materials of roasting furnaces, and achieve the effects of excellent high temperature strength and volume stability, simple process and low cost

Active Publication Date: 2008-09-10
李朝侠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This difference in indicators has prevented our country from solving the problem of lining materials for roasting furnaces for many years.

Method used

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  • Aluminum hydroxide dilute phase fluidization roasting furnace amorphous refractory material furnace lining
  • Aluminum hydroxide dilute phase fluidization roasting furnace amorphous refractory material furnace lining
  • Aluminum hydroxide dilute phase fluidization roasting furnace amorphous refractory material furnace lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The preparation of high-aluminum and iron-removing granular materials, the total Al of refractory castables 2 o 3 ≥65%, its composition is:

[0068] 5-8mm 20 parts

[0069] 3-5mm 18 parts

[0070] 1-3mm 20 parts

[0071] 0-1mm 12 parts

[0072] 180 mesh silica fine powder 5 parts

[0073] 200 mesh high alumina fine powder 9 parts

[0074] 325 mesh high alumina fine powder 5 parts

[0075] SiO 2 Micropowder (<10μm) 3 parts

[0076] Early-strength aluminate cement 8 parts

Embodiment 2

[0078] The material for preparing super-grade bauxite iron removal pellets, the total Al of wear-resistant and refractory castables 2 o 3 ≥75%, its composition is:

[0079] 5-8mm 10 parts

[0080] 3-5mm 9 parts

[0081] 1-3mm 10 copies

[0082] 0-1mm 6 parts

[0083] 200 mesh high aluminum powder 5 parts

[0084] 200 mesh brown corundum powder 8 parts

[0085] 325 mesh high aluminum powder 5 parts

[0086] SiO 2 Micropowder (<10μm) 4 parts

[0087] CA-50 aluminate cement 8 parts

Embodiment 3

[0089] Formulated special grade high aluminum granular material, corundum wear-resistant refractory castable Al 2 o 3 ≥78%, its composition is:

[0090] 5-8mm 11 copies

[0091] 3-5mm 8 parts

[0092] 1-3mm 10 parts

[0093] 0-1mm 6 parts

[0094] 200 mesh high alumina fine powder 6 parts

[0095] 180 mesh silica fine powder 4 parts

[0096] 320 mesh high alumina fine powder 5 parts

[0097] 200 mesh brown corundum fine powder 5 parts

[0098] Chrome corundum, 200 mesh fine powder 3 parts (Al 2 o 3 ≥80%, Cr 2 o 3 ≮12%)

[0099] CA-50 aluminate cement 7 parts

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Abstract

An unshaped refractory material furnace lining of an aluminum hydroxide dilute phase fluidized roaster is provided with different refractory materials at different parts, wherein the total content of Al2O3 in refractory castable is more than or equal to 65 percent; the compositions of granular material which is formed into high alumina and undergoes iron-removal treatment are as follows: 20 portions of 5 mm to 8 mm; 18 portions of 3 mm to 5 mm; 20 portions of 1 mm to 3 mm; 12 portions of 0 mm to 1 mm; 5 portions of 180-mesh silica fine powder; 9 portions of 200-mesh high alumina fine powder; 5 portions of 325-mesh high alumina fine powder; 3 portions of SiO2 micro powder (less than 10 micron); and 8 portions of early-strength type aluminate cement. The unshaped refractory material furnace lining has the advantages that: the refractory castable gains an advantage over imported refractory castable in bending resistance, pressure resistance, linear change after burning and particularly in thermal shock stability and wear resistance, and can maintain excellent strength performance when application temperature is between 200 DEG C and 1,200 DEG C; moreover, the refractory castable has better high-temperature flexibility and rapid cooling and rapid heating performance and can resist flushing abrasion; the outstanding advantages of the refractory castable including more than or equal to 40 times of water cooling thermal shock-resisting stability under 1,100 DEG C, 2.98cm<3> wear resistance under 1,100 DEG Cx3h and 1.266 W.m<-1>.k<-1> hot face coefficient of thermal conductivity under 800 DEG C; moreover, the refractory castable has simple making process, low cost, energy conservation and a long service life.

Description

technical field [0001] The invention relates to a furnace lining of an aluminum hydroxide dilute-phase fluidized roasting furnace for an amorphous refractory material, which belongs to the field of inorganic non-metallic materials. Background technique [0002] Most of the domestically introduced dilute-phase fluidized roasters are the gas-state suspension roaster (hereinafter referred to as GSC furnace) of Smith Company in Denmark. The roasting state is: dehydration and oxidation of 10% aluminum hydroxide in a very short time Aluminum lattice transformation. The GSC furnace requires the lining material to be resistant to the corrosion and abrasion of 10% aluminum hydroxide with a water content of 10% aluminum hydroxide formed under high-temperature roasting, and the reverse flow of materials and high-temperature air flow. [0003] The characteristics of the imported GSC furnace system with large tonnage are: ① There are many separation units, and the combination of multipl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李朝侠黄河黄兴远
Owner 李朝侠
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