Preparation method of magnesium oxide-nickel oxide-titanium dioxide composite material

A technology of titanium dioxide and composite materials, which is applied in the field of preparation of magnesium oxide-nickel oxide-titania composite materials, can solve the problems of difficult preparation and high energy consumption, and achieve low apparent porosity, high powder purity and low firing temperature Effect

Active Publication Date: 2015-05-13
TANGSHAN GUOLIANG SPEICAL REFRACTORY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of difficult preparation and high energy consumption of the existing magnesium oxide-nic...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] To analyze pure magnesium chloride (MgCl 2 ·6H 2 O), nickel chloride (NiCl 2 ·6H 2 O) and titanyl sulfate (TiOSO 4 2H 2 O) as the raw material, converted into magnesium oxide, nickel oxide and titanium dioxide according to the weight ratio of 90:5:5, add 5 times the total amount of solids in deionized water to dissolve, mix and stir for 30min, slowly add ammonia water dropwise to the mixed solution until the pH is 12. Water bath at 60°C and keep warm for 5 hours; filter the formed sediment, wash it several times, and dry it; heat it at 600°C for 1 hour and calcinate it, press the calcined powder into a block under a pressure of 150MPa, and then burn it at 1400°C for 3 hours become.

[0015] After testing, its indicators are: apparent porosity 3.5%, bulk density 3.41g / cm 3 , Autoclave hydration test for 3 hours (120 ° C, 0.2 MPa) weight gain of 3.5%.

Embodiment 2

[0017] To analyze pure magnesium chloride (MgCl 2 ·6H 2 O), nickel chloride (NiCl 2 ·6H 2 O) and titanyl sulfate (TiOSO 4 2H 2 O) as the raw material, converted into magnesium oxide, nickel oxide and titanium dioxide according to the weight ratio of 80:10:10, add 6 times the total amount of solids to be dissolved in deionized water, mix and stir for 30 minutes, slowly add ammonia water to the mixed solution to pH 13, water bath at 70°C, keep warm for 6h; filter the formed sediment, wash it several times, and dry it; heat it at 650°C for 0.5 hour and calcinate, press the calcined powder into a block under 200MPa pressure, and then hold it at 1500°C for 3h burnt.

[0018] After testing, its indicators are: apparent porosity 2.7%, bulk density 3.48g / cm 3 , Autoclave hydration test for 3 hours (120 ℃, 0.2MPa) weight gain of 0.7%.

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Abstract

The invention relates to a preparation method of a magnesium oxide-nickel oxide-titanium dioxide composite material and belongs to the technical field of the inorganic nonmetallic material. The magnesium chloride, nickel chloride and titanyl sulfate are taken as the raw materials, the preparation method comprises the following steps: preparing the solution from the raw materials in parts by weight: 80-90 parts of MgO, 5-10 parts of NiO, 5-10 parts of TiO2, adding alkali and titrating, controlling the ph value to be 12-13 to obtain the precipitate, washing, drying, keeping the temperature for 0.5-1h at 600-650 DEG C to obtain the composite powder, dry pressing the composite powder via the pressure more than 150MPa, keeping the temperature for 3h at 1400-1500 DEG C and calcining to obtain the composite material. The composite powder prepared by the method is high in purity and small in granularity; the oxides are evenly mixed and the activity is great; the composite material is obtained by calcining the composite powder, the firing temperature is low, the clinker structure is compact, the apparent porosity is low and the hydrate resistance property is good.

Description

technical field [0001] The invention relates to a preparation method of magnesium oxide-nickel oxide-titanium dioxide composite material, which belongs to the technical field of inorganic non-metallic materials. Background technique [0002] As we all know, magnesia refractories have excellent corrosion resistance to alkaline slag and no pollution to molten steel. Defects such as peeling. In order to improve the thermal shock resistance and slag penetration resistance of magnesia refractories, researchers at home and abroad have long studied Al 2 o 3 , ZrO 2 、Cr 2 o 3 、TiO 2 The effects of oxides such as magnesia on the composition and properties of magnesia materials, and synthesized spinel, magnesium-zirconium clinker, magnesium-chromium clinker and magnesium-titanium clinker by sintering or electrofusion methods, and achieved some results. Due to the limited improvement of the performance of magnesium materials by adding a single oxide, especially when magnesium-c...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 王义龙
Owner TANGSHAN GUOLIANG SPEICAL REFRACTORY MATERIAL
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