Magnesium aluminate spinel powder, preparation method and application to preparation of refractory material
A magnesia-aluminum spinel powder and step method, which is applied in the field of application, preparation, and magnesia-aluminum spinel preparation of refractory materials, can solve the problems of accelerated slag penetration, cracking of refractory materials, etc., to prevent particle growth and improve Slag resistance, easy process effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0038] Present embodiment adopts light magnesia (purity ≥ 99.0%), boehmite (aluminum content is 85%), carbon black and PVP solution are raw materials, by mass percentage, light magnesia (purity ≥ 99.0%) is 8.31%, boehmite (85% aluminum content) is 30.90%, carbon black is 3.26%, PVP / H 2 O is 57.55%, where MgO: Al 2 o 3 The molar ratio is 1:1.25, light magnesium oxide, boehmite, carbon black, PVP / H 2 The sum of the mass percentages of O is 100%.
[0039] The raw materials are proportioned according to the proportion, and the specific operation process is as follows: figure 1 shown. Configure PVP / H first 2 O is a 6% dispersion liquid, ultrasonically disperse the carbon black, and then ball mill and mix the dispersed carbon black with magnesia and boehmite. The ratio is 3:1; the raw materials after liquid phase ball milling, drying and grinding into powder are put into the mould, pressed and formed under the pressure of 2MPa, and after the molding is completed, the sample is...
Embodiment 2
[0042]The difference between this embodiment and Example 1 is that the ratio of magnesium to aluminum is different: by mass percentage, light magnesium oxide (purity ≥ 99.0%) is 8.85%, boehmite (aluminum content is 85%) is 26.35%, carbon Black is 3.47%, PVP / H 2 O is 61.33%, where MgO: Al 2 o 3 The molar ratio is 1:1, light magnesium oxide, boehmite, carbon black, PVP / H 2 The sum of the mass percentages of O is 100%, and its implementation process is consistent with Example 1.
[0043] Carry out X-ray diffraction analysis and SEM analysis to the carbon / magnesium aluminum spinel composite powder prepared in embodiment 2, see Image 6 with 7 , indicating that the main phase composition in the carbon / magnesium-aluminum spinel composite powder prepared in Example 2 is stoichiometric ratio magnesium-alumina spinel, the same as in Example 1, because the carbon in the product is amorphous, so in the XRD There is no carbon peak; it can be seen from SEM that the morphology of the m...
Embodiment 3
[0045] The difference between this embodiment and Example 1 is that the ratio of magnesium to aluminum is the same but carbon black is not added in the raw material: by mass percentage, light magnesium oxide (purity ≥ 99.0%) is 21.18%, boehmite (aluminum content is 85%) ) is 78.82%, where MgO: Al 2 o 3 The molar ratio is 1:1.25, and the sum of the mass percentages of light magnesia and boehmite in the raw materials is 100%. Compared with Example 1, the preparation process is directly mixed with light magnesia and boehmite by ball milling, grinding, pressing and molding, and is consistent with the sintering process and parameters in Example 1. After sintering, it does not contain Carbon Magnesium Aluminum Spinel Powder
[0046] Carry out X-ray diffraction analysis and SEM analysis to the carbon-free magnesium aluminum spinel composite powder prepared in embodiment 3, see Figure 8 with Figure 9 , to illustrate that the preparation of Example 3 is the same as in Example 1 a...
PUM
| Property | Measurement | Unit |
|---|---|---|
| size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More