Flexible composite spinel tin refractory material for pyrometallurgical noble metal smelting and preparation method of flexible composite spinel tin refractory material

A technology for refractory materials and precious metals, which is applied to the field of flexible composite spinel tin refractories for pyrometallurgical smelting and its preparation, and can solve the problem that the corrosion resistance of precious metal smelting slag cannot be well improved, flexibility and heat Insufficient shock stability, affecting the service life of the kiln, etc., to achieve the effects of good thermal shock stability, low temperature resistance to melt permeability, and small elastic modulus

Inactive Publication Date: 2015-02-18
郑州汇特耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, chromium-aluminum refractories and aluminum-chromium-zirconium refractories have high high-temperature strength and excellent resistance to high-temperature melt erosion, but their resistance to erosion by precious metal smelting slag cannot be well improved
Moreover, its flexibility and thermal shock stability are not as good as m

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1:

[0023] A flexible composite spinel tin refractory for pyrometallurgical precious metal smelting, which is made of the following raw materials according to parts by weight:

[0024] 5mm~0mm dense corundum sand 76 parts, 3mm~0mm chromium slag 15 parts, 1mm~0mm magnesia 6.0 parts, ≤0.045mm chrome green 1.5 parts, ≤0.045mm fused zirconia 1 part; ≤0.045mm tin oxide 0.5 parts , The binder is a mixed solution of phosphoric acid and oxalic acid (the mass ratio of phosphoric acid to oxalic acid is 9:1), and the added amount is the total weight of compact corundum sand, chromium slag, magnesia, chrome green, fused zirconia and tin oxide 4%.

[0025] The manufacturing method of the above flexible composite spinel tin refractory is as follows:

[0026] a) Take the material according to the weight ratio of the raw materials according to claim 1;

[0027] b) Add the obtained raw materials to the binder of claim 1, and mix them in a powerful sand mixer;

[0028] c) The mixed mater...

Example Embodiment

[0033] Example 2:

[0034] A flexible composite spinel tin refractory for pyrometallurgical precious metal smelting, which is made of the following raw materials according to parts by weight:

[0035] 5mm~0mm dense corundum sand 66 parts, 3mm~0mm chromium slag 20 parts, 1mm~0mm magnesia 8.5 parts, ≤0.045mm chrome green 2.5 parts, ≤0.045mm fused zirconia 2 parts; ≤0.045mm tin oxide 1 part , The binder is a mixed solution of phosphoric acid and oxalic acid (the mass ratio of phosphoric acid to oxalic acid is 9:1), and the added amount is the total weight of compact corundum sand, chromium slag, magnesia, chrome green, fused zirconia and tin oxide 6%.

[0036] The preparation method is the same as in Example 1.

[0037] Implementation effect: product test results are shown in Table 4

Example Embodiment

[0038] Example 3:

[0039] A flexible composite spinel tin refractory for pyrometallurgical precious metal smelting, which is made of the following raw materials according to parts by weight:

[0040] 5mm~0mm dense corundum sand 57 parts, 3mm~0mm chromium slag 25 parts, 1mm~0mm magnesia 10 parts, ≤0.045mm chrome green 3.5 parts, ≤0.045mm fused zirconia 3 parts; ≤0.045mm tin oxide 1.5 parts , The binder is a mixed solution of phosphoric acid and oxalic acid (the mass ratio of phosphoric acid to oxalic acid is 9:1), and the added amount is the total weight of compact corundum sand, chromium slag, magnesia, chrome green, fused zirconia and tin oxide 8%.

[0041] The preparation method is the same as in Example 1.

[0042] Implementation effect: product test results are shown in Table 4

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Abstract

The invention discloses a flexible composite spinel tin refractory material for pyrometallurgical noble metal smelting and a preparation method of the flexible composite spinel tin refractory material. According to the flexible composite spinel tin refractory material for the pyrometallurgical noble metal smelting and the preparation method of the flexible composite spinel tin refractory material, eutectic aluminum chromium, magnesium chromium spinel and magnesium aluminum spinel are used as a main crystal phase; electric-melting zirconium oxide is introduced into a substrate part; the thermal shock resistance of a product is improved by producing micro-cracks by converting a crystal form of the zirconium oxide during a firing process, and meanwhile, the crystal lattice structure is changed by forming magnesium tin spinel by introducing tin oxide, so that the flexibility and the performance of resisting noble metal smelting slag erosion of a product are improved. The flexible composite spinel tin refractory material for the pyrometallurgical noble metal smelting and the preparation method of the flexible composite spinel tin refractory material have great significance on solving the problems about thermal spalling and structural spalling damage of a noble metal smelting furnace refractory lining material during a using process, and the overall service life of the noble metal smelting furnace refractory lining material is prolonged.

Description

technical field [0001] The invention relates to the technical field of refractory materials for smelting precious metals by pyromethods, in particular to a flexible composite spinel tin refractory material for smelting precious metals by pyromethods and a preparation method thereof. Background technique [0002] At present, magnesia-chrome bricks are mostly used in pyro-method precious metal smelting furnaces. Magnesia-chrome bricks have good resistance to slag erosion, but poor flexibility. Volume scour and penetration performance could not be better improved so far Cr 2 o 3 Magnesia-chrome bricks with a content of 16-24% are still commonly used refractory materials in pyrometallurgical smelting. [0003] The existing technology is to apply chrome-aluminum refractory materials and aluminum-chromium-zirconium refractory materials to pyrometallurgical precious metal smelting kilns. The chrome-aluminum and aluminum-chromium-zirconium refractory materials start with chromium ...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66C04B35/443C04B35/62204C04B2235/3206C04B2235/3217C04B2235/3244C04B2235/3293C04B2235/606C04B2235/656
Inventor 董跃慕松林董梅花
Owner 郑州汇特耐火材料有限公司
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