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Vermiculizer for disposing high sulfur melted iron in vermicular cast iron production

A technology of vermicular graphite cast iron and vermicularizing agent, which is applied in the field of processing molten iron with high sulfur content, can solve the problems of restricting the production and use of vermicular graphite iron, difficult casting production, and large fluctuation of production, and achieves strong anti-recession ability, Stable creeping effect and stable response

Inactive Publication Date: 2004-11-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when the amount of sulfur in high-sulfur molten iron and molten iron fluctuates greatly, the fluctuation of production is greater, which makes casting production difficult and greatly limits the production and use of vermicular graphite cast iron

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The chemical composition of the creeping agent: magnesium (Mg): 3%, rare earth (RE): 20%, silicon (Si): 42.5%, calcium (Ca): 2.5%, zinc (Zn): 1.5%, barium (Ba ): 1.0%, aluminum (Al): 1.0%, and the rest is iron (Fe).

[0031] Preparation method: put 11% silicon-calcium alloy (SiCa), 5% silicon-barium alloy (SiBa) and 42% rare-earth ferrosilicon alloy (RESiFe) into the bottom of the crucible, then add 3% magnesium ingot, 1.0% aluminum ingot, 1.5% zinc Ingot, then put the remaining 30% rare earth ferrosilicon alloy (RESiFe) and 6.5% ferrosilicon alloy (SiFe) on top of the magnesium, aluminum, zinc ingots, compact and smelt, when the furnace temperature reaches about 1250-1300℃, the furnace charge When it becomes completely liquid, stir it evenly and pour it into a metal ingot mold, and after cooling, it can be broken into a certain particle size before use.

Embodiment 2

[0033] The chemical composition of the creeping agent: magnesium (Mg): 4%, rare earth (RE): 18%, silicon (Si): 43.5%, calcium (Ca): 2.0%, zinc (Zn): 1.0%, barium (Ba ): 1.5%, aluminum (Al): 1.5%, and the rest is iron (Fe).

[0034] Preparation method: put 8.5% silicon-calcium alloy (SiCa), 7.5% silicon-barium alloy (SiBa) and 35% rare earth silicon-iron alloy (RESiFe) into the bottom of the crucible, then add 4% magnesium ingot, 1.5% aluminum ingot, 1.0% zinc Ingot, then put the remaining 30% rare earth ferrosilicon alloy (RESiFe) and 12.5% ​​ferrosilicon alloy (SiFe) on top of magnesium, aluminum, zinc ingots, compact and smelt, when the furnace temperature reaches about 1250 ~ 1300 ℃, charge When it becomes completely liquid, stir it evenly and pour it into a metal ingot mold, and after cooling, it can be broken into a certain particle size before use.

[0035] Effect example 1 of the present invention:

[0036] RDS (Reciprocating Duplicate System) natural gas compressor u...

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Abstract

The invention discloses a creeping agent used for processing high-sulfur iron melt to produce vermicaular graphite cast iron, containing the components in weight percent: rare-earth (RE) 15-35%, magnesium (Mg) 2-6%, silicon (Si) 35-45%, aluminum (Al) 1-5%, calcium (Ca) 1-5%, zinc (Zn) 0.5-2.5%, barium (Ba) 0.5-2.5%, and iron (Fe) the rest. It is melted of the raw materials of rare-earth silicon iron alloy, metal Mg, SiCa, SiBa, Al ingot, Zn ingot, etc. The invention has the characters of simple operation, good solubility, stable reaction, high absorptivity, high creeping rate, stable creeping effect, and strong anti-decay ability, and can meet the requirements of producing casts at different wall thicknesses, has wide marketing prospect and remarkable economic benefits.

Description

technical field [0001] The invention relates to a vermicular agent for processing molten iron to produce vermicular graphite cast iron. Especially for the treatment of molten iron with high sulfur content. Background technique [0002] Graphite in vermicular graphite cast iron is worm-like, a graphite form between spherical graphite and flake graphite, and graphite is connected together in the eutectic group. The ferrite content in the as-cast structure of ordinary vermicular graphite cast iron is relatively high, and the amount of pearlite can be increased by alloying (Cr, Mo, Cu, Sn, Sb) or normalizing treatment. The tensile strength, elongation and impact toughness of compacted graphite cast iron are between gray cast iron and ductile iron. Both gray cast iron and gray cast iron are good, and can be used to manufacture steel ingot molds, exhaust pipes, glass molds, brake discs and other parts that work under alternating temperatures. The casting performance of vermicul...

Claims

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Application Information

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IPC IPC(8): C22C33/08C22C33/10
Inventor 蔡启舟胡开华魏伯康
Owner HUAZHONG UNIV OF SCI & TECH
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