Production method of chromium corundum brick with reduction reaction resistance and thermal shock resistance for non-ferrous metal smelting fuming furnace or side-blown furnace

A non-ferrous metal, chrome corundum brick technology, applied in the field of refractory materials, can solve the problems of poor anti-reduction reaction and thermal shock stability, unable to meet the requirements of kiln use, etc., to improve anti-stripping performance, good anti-reduction effect, iron oxide low content effect

Inactive Publication Date: 2020-07-17
锦州集信高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing ordinary chromium slag refractory materials have the problems of poor resistance to reduction reaction and thermal shock stability, which cannot meet the requirements of these kilns.

Method used

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  • Production method of chromium corundum brick with reduction reaction resistance and thermal shock resistance for non-ferrous metal smelting fuming furnace or side-blown furnace
  • Production method of chromium corundum brick with reduction reaction resistance and thermal shock resistance for non-ferrous metal smelting fuming furnace or side-blown furnace
  • Production method of chromium corundum brick with reduction reaction resistance and thermal shock resistance for non-ferrous metal smelting fuming furnace or side-blown furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Raw material selection: Al in chromium slag 2 o 3 The mass percentage content is 78% ~ 86%, Cr 2 o 3 The mass percentage content is 5% ~ 13%, Al 2 o 3 and Cr 2 o 3 The mass percentage content of the total amount is ≥92%; Al in the tabular alumina 2 o 3 Mass percentage content ≥ 99.0%; Al in the chrome concentrate 2 o 3 The mass percentage content is 15% to 26%, Cr 2 o 3 The mass percentage content is 43% to 56%; the Al in the fused zircon mullite 2 o 3 Mass percentage content 43% ~ 48%, SiO 2 Mass percentage content 16% ~ 20%, ZrO 2 Mass percentage content ≥ 30.0%.

[0037] Concrete preparation steps are as follows:

[0038] a. Raw materials and processing

[0039] Crushing the chromium slag to a particle size of ≤5mm; crushing the tabular alumina to a particle size of ≤5mm; grinding the chrome concentrate to a particle size of 40 mesh; crushing the fused zirconia mullite to a particle size of ≤3mm;

[0040] b. Mix well

[0041] Mix 8.4 tons of chromi...

Embodiment 2

[0053] Raw material selection: Al in chromium slag 2 o 3 The mass percentage content is 78% ~ 86%, Cr 2 o 3 The mass percentage content is 5% ~ 13%, Al 2 o 3 and Cr 2 o 3 The mass percentage content of the total amount is ≥92%; Al in the sintered corundum 2 o 3 Mass percentage content ≥ 99.0%; Al in the chrome concentrate 2 o 3 The mass percentage content is 15% to 26%, Cr 2 o 3 The mass percentage content is 43% to 56%; the Al in the fused zircon mullite 2 o 3 Mass percentage content 43% ~ 48%, SiO 2 Mass percentage content 16% ~ 20%, ZrO 2 Mass percentage content ≥ 30.0%.

[0054] Concrete preparation steps are as follows:

[0055] a. Raw materials and processing

[0056] Crushing chromium slag to particle size ≤ 5mm; crushing sintered corundum to particle size ≤ 5mm; grinding chrome concentrate to particle size 40 mesh; crushing fused zirconia mullite to ≤ 3mm;

[0057] b. Mix well

[0058] Mix 15 tons of chromium slag crushed to a particle size of ≤5 mm,...

Embodiment 3

[0070] Raw material selection: Al in chromium slag 2 o 3 The mass percentage content is 78% ~ 86%, Cr 2 o 3 The mass percentage content is 5% ~ 13%, Al 2 o 3 and Cr 2 o 3 The mass percentage content of the total amount is ≥92%; Al in the sintered corundum 2 o 3 Mass percentage content ≥ 99.0%; Al in the chrome concentrate 2 o 3 The mass percentage content is 15% to 26%, Cr 2 o 3 The mass percentage content is 43% to 56%; the Al in the fused zircon mullite 2 o 3 Mass percentage content 43% ~ 48%, SiO 2 Mass percentage content 16% ~ 20%, ZrO 2 Mass percentage content ≥ 30.0%.

[0071] Concrete preparation steps are as follows:

[0072] a. Raw materials and processing

[0073] Crushing the chromium slag to a particle size of ≤5mm; crushing the tabular alumina to a particle size of ≤5mm; grinding the chrome concentrate to a particle size of 40 mesh; crushing the fused zirconia mullite to a particle size of ≤3mm;

[0074] b. Mix well

[0075] 11.1 tons of chromiu...

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Abstract

The invention relates to a production method of chromium corundum bricks with reduction reaction resistance and thermal shock resistance for a non-ferrous metal smelting fuming furnace or a side-blownfurnace. The method includes uniformly mixing the crushed chromium slag, sintered corundum and chromium concentrate; adding into a three-phase electric arc furnace for smelting; smelting to obtain achromium corundum material; crushing, grinding, screening and grading the chromium corundum material to obtain particles with the particle sizes of 5-3mm, 3-1mm and 1-0mm and powder with the particlesizes of 180-mesh and 325-mesh respectively, adding 3-1mm fused zirconium mullite to obtain a mixed premix, adding a binding agent phosphoric acid, uniformly stirring, and standing for more than or equal to 48h; and adding a binding agent aluminum dihydrogen phosphate, mixing, carrying out compression molding, and carrying out high-temperature firing to obtain the chromium corundum brick. The invention has the advantages that the raw material cost is low, the cost performance is high, and the produced chromium corundum brick not only has scouring resistance, erosion resistance and high temperature resistance, but also has reduction reaction resistance and thermal shock resistance, and can be used for furnace slag line parts, bottoms and reaction zones for smelting lead, zinc, tin and othernonferrous metals.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a production method of chromium corundum bricks, in particular to a production method of chromium corundum bricks for non-ferrous metal smelting fuming furnaces or side blowing furnaces which are resistant to reduction reaction and thermal shock. Background technique [0002] The working environment of refractories for non-ferrous metal kilns is harsh, especially for kilns in some fields, such as fuming furnaces for smelting lead, zinc, and tin, and side-blown furnaces, which have higher requirements for refractory materials and require high normal temperature and pressure resistance Strength, high erosion resistance, high reduction resistance, high thermal shock resistance, high cost performance. These are not prepared for the original refractory material - magnesia chromium refractory material. However, the existing ordinary chromium slag refractory materials ha...

Claims

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Application Information

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IPC IPC(8): C04B35/105C04B35/106C04B35/622C04B35/626C04B38/00F27B14/00
CPCC04B35/105C04B35/106C04B35/62204C04B35/62665C04B38/00F27B14/00C04B2235/3217C04B2235/447C04B2235/3463C04B2235/5427C04B2235/5436C04B2235/656C04B2235/6567C04B2235/96C04B2235/9607C04B2235/9669C04B38/0067C04B38/0074
Inventor 曹杨高红军宋建义赵鹏达林万兴何凯陈位移田刚
Owner 锦州集信高温材料有限公司
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