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A technology of draining sand and alkalinity, which is used in casting melt containers, manufacturing tools, metal processing equipment, etc., to achieve the effects of no environmental pollution, high refractoriness, and strong corrosion resistance.
Inactive Publication Date: 2010-06-16
INST OF METALLURGICAL TECH DONGBEI UNIV SHENYANG
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[0007] Aiming at the problems existing in the existing drainage sand, the present invention provides an alkaline drainage sand with high refractoriness, strong corrosion resistance, low self-opening rate, low price, no environmental pollution, no damage to the metallurgical environment of the tundish, and easy to use. quicksand
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Embodiment 1
[0012] First mix 40% of passivated lime, 15% of calcite, 10% of corundum, 33% of calcined forsterite sand, and 2% of flake graphite, and then pack them in 10kg bags to prevent material segregation .
[0013] Among them, CaO in passivated lime > 92%, particle size 3 >95%, whiteness greater than 90%, average particle size 2 o 3 >85%, average particle size 40%, SiO 2 >35%, particle size 2-1mm, moisture ≯0.5%; fixed C in flake graphite>95%, average particle size<0.074mm.
[0014] The drainage sand with this ratio was used in a steel factory, and the self-opening rate reached over 98%.
Embodiment 2
[0016] First mix 50% passivated lime, 10% calcite, 5% corundum, 30% calcined forsterite sand, and 5% flake graphite, and then pack them in 10kg bags to prevent material segregation.
[0017] Among them, CaO in passivated lime > 92%, particle size 3 >95%, whiteness greater than 90%, average particle size 2 o 3 >85%, average particle size 40%, SiO 2 >35%, particle size 2-1mm, moisture ≯0.5%; fixed C in flake graphite>95%, average particle size<0.074mm.
[0018] The drainage sand with this ratio was used in a steel factory, and the self-opening rate reached over 97%.
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Abstract
The invention relates to an alkaline flow guiding sand used in a steel ladle, which belongs to the metallurgy technical field, and comprises the chemical compositions as follows (by weight percentage): passive limes account for 30 to 50 percent, calcites account for 5 to 15 percent, corundum accounts for 5 to 10 percent, calcined olivine sands account for 20 to 40 percent, and flaky graphite accounts for 1 to 5 percent; and all components are confected according to the proportions and then are mixed to form the alkaline flow guiding sand. The prepared alkaline flow guiding sand used in the steel ladle has the characteristics of high refractability, strong erosion-resistence, high ladle free opening rate, low cost, no environmental pollution, no damage to pouring box metallurgy environment,and convenient use.
Description
technical field [0001] The invention belongs to the technical field of metallurgy, in particular to an alkaline drainage sand for a ladle. Background technique [0002] With the increasing demand for clean steel and people's attention to environmental protection issues, industrial production has continuously improved the performance requirements of drainage sand. Not only is it required that the drainage sand can automatically open the ladle, but also the composition of the drainage sand should be reduced. The adverse effect of the tundish metallurgical process has little environmental pollution. High-quality drainage sand should have good natural fluidity and low thermal expansion tendency. After contacting with molten steel, a dense sintered layer will be quickly formed at the steel-sand interface to prevent the penetration of molten steel and the floating of drainage sand particles, and the sintered drainage sand The strength is low and can be broken by the static pressu...
Claims
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/46C04B35/66
Inventor 孙中强陆彩云芮树森
Owner INST OF METALLURGICAL TECH DONGBEI UNIV SHENYANG
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