Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF1 Cites 11 Cited by
  • 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 magnesia-chrome bricks, which leads to fractures within a short period of use and affects the service life of the kiln. The finished production cycle is usually 15-20 days, which is much higher than the 6-7 days of the tunnel kiln firing production cycle, and the thermal efficiency of the smoke-removing kiln is low, polluting the environment

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

Embodiment 1

[0023] A flexible composite spinel tin refractory material for pyrometallurgy, which is made of the following raw materials in proportion by weight:

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

[0025] The manufacture method of above-mentioned flexible composite spinel tin refractory material is as follows:

[0026] a) taking according to the raw material weight ratio described in claim 1;

[0027] b) adding the good raw materials to the binding agent described in claim 1, and mixing in a strong sand mixer;

[0028] c) The mixed m...

Embodiment 2

[0034] A flexible composite spinel tin refractory material for pyrometallurgy, which is made of the following raw materials in proportion by weight:

[0035] 66 parts of 5mm~0mm dense corundum sand, 20 parts of 3mm~0mm chromium slag, 8.5 parts of 1mm~0mm magnesia, 2.5 parts of chrome green ≤0.045mm, 2 parts of fused zirconia ≤0.045mm; 1 part of tin oxide ≤0.045mm , the binder is a mixed solution of phosphoric acid and oxalic acid (the mass ratio of phosphoric acid and oxalic acid is 9:1), and the amount added is the total weight of dense corundum sand, chrome 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 testing results are shown in Table 4

Embodiment 3

[0039] A flexible composite spinel tin refractory material for pyrometallurgy, which is made of the following raw materials in proportion by weight:

[0040] 57 parts of 5mm~0mm dense corundum sand, 25 parts of 3mm~0mm chromium slag, 10 parts of 1mm~0mm magnesia, 3.5 parts of chrome green ≤0.045mm, 3 parts of fused zirconia ≤0.045mm; 1.5 parts of tin oxide ≤0.045mm , the binder is a mixed solution of phosphoric acid and oxalic acid (the mass ratio of phosphoric acid and oxalic acid is 9:1), and the amount added is the total weight of dense corundum sand, chrome 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 testing results are shown in Table 4

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

No PUM Login to View More

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

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): C04B35/66
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com