Composite magnesium oxide for welding flux production and preparation method thereof
A technology of magnesium oxide and light magnesium oxide, applied in chemical instruments and methods, inorganic pigment treatment, dyeing physical treatment, etc., can solve the problems of insufficient gas escape, poor manufacturability, serious surface indentation, etc. Improves the effect of poor indentation and alignment, slag viscosity reduction, and slag melting point reduction
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[0019] First, the present invention provides a kind of preparation method of composite magnesium oxide for flux production, comprises the steps:
[0020] S1: Heat the ultra-fine-grained iron oxide red from room temperature to 500-650°C, and keep it warm, turn over the material during the keep warm, and cool to room temperature after the keep warm;
[0021] S2 sieves the cooled iron oxide red in S1 for subsequent use;
[0022] S3 blends the iron oxide red in S2 with ultra-fine-grained magnesium oxide, and places them in a closed environment for stirring to obtain a premix;
[0023] S4 baking the premix at high temperature to obtain composite magnesium oxide.
[0024] In the present invention, the material of magnesia includes at least one of sintered magnesia, fused magnesia, or light magnesia;
[0025] The particle size of the sintered magnesia and the fused magnesia is at least 90% over -0.043mm; the particle size of the light magnesium oxide is 0.1-10 μm, the purity of MgO...
Embodiment 1
[0035] Embodiment 1 (light magnesium oxide)
[0036] A kind of preparation method of composite magnesium oxide for flux production is,
[0037] Put 200g of ultra-fine red iron oxide with a purity of 98% in a muffle furnace, raise the low temperature to 650°C and roast for 2 hours, take it out and cool it to room temperature, and disperse the roasted agglomerates with a 180-mesh sieve to obtain red iron oxide under the sieve;
[0038] Take 160g of iron oxide red under the sieve and 1000g of light magnesia with a purity of 98% and shake it on a high-frequency oscillator for 1 hour to form a premix, place the mixed premix in a muffle furnace, and Raise the temperature to 950°C, keep it warm for 2 hours, and place it in an airtight container after cooling to obtain a composite magnesium oxide material.
[0039] The chemical composition of the composite magnesium oxide material is expressed as a percentage, Fe 2 o 3 13.6%, MgO 86.1%, P 0.004%, S 0.009%.
Embodiment 2
[0040] Embodiment 2 (fused magnesia)
[0041] Put 100g of superfine red iron oxide with a purity of 98% in a muffle furnace, raise the low temperature to 650°C and roast for 2 hours, take it out and cool it to room temperature, and disperse the roasted agglomerates with a 180-mesh sieve to obtain red iron oxide under the sieve;
[0042] Take 35g of iron oxide red under the sieve and 1000g of superfine (particle size-0.035mm) fused magnesia with a purity of 98%, and shake it in a closed state on a high-frequency oscillator for 1 hour to form a premix, and place the mixed premix in In the muffle furnace, the room temperature is raised to 800°C, and the temperature is kept for 2 hours. After cooling, it is placed in a closed container to obtain a composite magnesium oxide material.
[0043] The chemical composition of the composite magnesium oxide material is expressed as a percentage, Fe 2 o 3 3.5%, MgO 96.8%, P 0.003%, S0.010%.
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Abstract
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