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A kind of metal high chromium brick and its preparation method

A high-chromium brick and metal technology, applied in the field of refractory materials, can solve the problems that high-chrome bricks cannot maintain stability, etc., and achieve the effect of increasing service life and improving refractoriness

Active Publication Date: 2016-06-01
长兴正发热电耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that high chrome bricks cannot maintain stability at high temperatures, we have proposed a metal high chrome brick and its preparation method. The invention can effectively improve the stability of high chrome bricks at high temperatures, and at the same time improve the stability of high chrome bricks. refractoriness and service life

Method used

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  • A kind of metal high chromium brick and its preparation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] A metal high-chromium brick, composed of the following raw materials by mass percentage: fused chromium oxide: 60.2%; sintered chromium oxide particles: 15%; chrome corundum particles: 15%; alumina fine powder: 2%; magnesium oxide fine powder: 2% %; zirconia powder: 2%; yttrium oxide powder: 0.1%; lanthanum and lanthanide metal oxide powder: 0.1%; metal aluminum powder: 0.5%; metal chromium powder: 0.5%; Yttrium fine powder: 0.1%; binder: 2%. The production steps are as follows:

[0021] (1) Premixing: Feed fused chromium oxide, sintered chromium oxide particles and chrome corundum particles into the sand mixer for premixing for 8 minutes;

[0022] (2) Mixing: Send another batch of fused chromium oxide, sintered chromium oxide particles and chrome corundum particles into the sand mixer and mix for 8 minutes, add binder and mix for 8 minutes, then add alumina micropowder, magnesia micropowder, Zirconia micropowder, yttrium oxide micropowder, lanthanum and lanthanide me...

Embodiment 2

[0028] A metal high-chromium brick, composed of the following raw materials by mass percentage: fused chromium oxide: 59%; sintered chromium oxide particles: 15%; chrome corundum particles: 15%; alumina fine powder: 2%; magnesium oxide fine powder: 2 %; zirconia powder: 2%; yttrium oxide powder: 0.5%; lanthanum and lanthanide metal oxide powder: 0.5%; metal aluminum powder: 0.5%; metal chromium powder: 0.5%; Yttrium powder: 0.5%; binder: 2%.

[0029] The production steps are substantially the same as in Example 1. After completion, random samples were taken for high-temperature performance test, and the results are shown in Table 1.

Embodiment 3

[0031] A metal high-chromium brick, composed of the following raw materials in mass percentage: fused chromium oxide: 57.5%; sintered chromium oxide particles: 15%; chrome corundum particles: 15%; alumina micropowder: 2%; %; zirconia powder: 2%; yttrium oxide powder: 1%; lanthanum and lanthanide metal oxide powder: 1%; metal aluminum powder: 0.5%; metal chromium powder: 0.5%; Yttrium fine powder: 1%; binder: 2%.

[0032] The production steps are substantially the same as in Example 1. After completion, random samples were taken for high-temperature performance test, and the results are shown in Table 1.

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Abstract

The invention provides a metallic high chrome brick, which is prepared from chromium oxide, sintering chrome oxide particle, chrome-corundum particle, alumina micro powder, magnesium oxide micro powder, zirconia micro powder, yttrium oxide micro powder, lanthanum and lanthanide-series metal oxide powder, metallic aluminum powder, chromium metal powder, zirconium metal powder, metal yttrium powder and a binding agent. The invention simultaneously provides a preparation method of the metallic high chrome brick. The method comprises the following steps: premixing; mixing materials; molding; drying; firing; sorting; inspecting; packing; and warehousing. The refractoriness, the stability and the slag resistance of the chrome brick are improved by adding the metal powder and the metal oxide powder; and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a metal high-chromium brick and a preparation method thereof. Background technique [0002] In industries such as CFB boilers, gasifiers, ceramics and chemicals, the refractory and wear-resistant requirements of refractory bricks are much higher than ordinary refractory bricks. In these fields, high-chrome bricks are often used. High chrome bricks have the advantages of high refractoriness and mechanical strength, low thermal expansion coefficient, strong wear resistance and slag resistance, and good thermal shock stability, which are incomparable to ordinary refractory bricks. However, in some special fields, The requirements for refractory materials are higher, but high chrome bricks cannot break through the bottleneck of 1900°C refractoriness. , Solving the problem of binders at high temperatures is the key to whether high chrome bricks can withstand higher tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 周益城周成周成平
Owner 长兴正发热电耐火材料有限公司