Repair material for molten iron desulfurization stirring paddle
A technology for hot metal desulfurization and repair material, which is applied in the field of refractory materials for hot metal pretreatment before converter steelmaking, can solve the problems of unfavorable factors in the service life of the stirring paddle, increase the maintenance cost of the stirring paddle, affect the service life of the stirring paddle, etc., and achieve perfect construction Performance and usability, improved erosion resistance and spalling resistance, good sintering condition
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Embodiment 1
[0033] A repair material for molten iron desulfurization stirring paddle, which is made by mixing repair material base material and additives. Andalusite, 28% refractory clay, 2% pure calcium aluminate cement. The additive is based on the total weight of the repair material base material (100%), and consists of 0.3% sodium tripolyphosphate and 0.2% aluminum silicate fiber cotton.
[0034] Its physical and chemical indicators: compressive strength (110℃×24h) 29Mpa, compressive strength (1500℃×3h) 66Mpa; bulk density (110℃×24h) 2.95g / cm 3 , Bulk density (1500℃×3h) 2.82g / cm 3 , The line change after burning (1500℃×3h) is ±0.2%.
[0035]The particle size of high alumina bauxite is 1-3 mm, the particle size of coke gemstone is 0.1-1 mm, and the particle size of andalusite is 200 mesh fine powder.
[0036] A preparation method for a repairing material for a molten iron desulfurization stirring paddle comprises the following steps:
Embodiment 2
[0041] Other is with embodiment 1, and difference is:
[0042] The additive is based on the total weight of the repair material base material (100%), and consists of 0.3% melamine and 0.2% aluminum silicate fiber cotton.
[0043] The particle size of high alumina bauxite is 200 mesh fine powder, the particle size of coke gemstone is 0.1-1 mm, and the particle size of andalusite is 0.1-1 mm.
Embodiment 3
[0045] Other is with embodiment 1, and difference is:
[0046] The additive is based on the total weight of the repair material base material (100%), and is composed of 0.3% sodium tripolyphosphate and 0.2% organic fiber.
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