High cerium rare earth ferrosilicon alloy and production method thereof

A technology of rare earth ferrosilicon alloy and production method, which is applied in the field of metal smelting, can solve the problems of severe alloy pulverization, low rare earth yield, and high production cost of rare earth ferrosilicon alloy, and achieve weakened equipment corrosion, good economic benefits, and improved utilization of rare earth resources rate effect

Inactive Publication Date: 2017-03-29
LIXIAN MINJIANG RARE EARTH NEW MATERIAL DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The technical problem to be solved by the present invention is that the production cost of the existing rare earth ferrosilicon alloy is high, the alloy is pulverized seriously, and the yield of rare earth is low

Method used

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  • High cerium rare earth ferrosilicon alloy and production method thereof
  • High cerium rare earth ferrosilicon alloy and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] a. Add water glass to 100kg of ceric rare earth slag to deacidify the ceric rare earth slag to a pH value of 6.8;

[0050] b. Add 25kg of carbon powder and 35kg of alkaline binder to the deacidified ceric rare earth slag, and press it into rare earth pellets;

[0051] c. Put 228kg of silica, 171kg of carbon reducing agent and the above-mentioned rare earth pellets together into the furnace for smelting for 2.5 hours, take them out of the furnace and cast them, and obtain high-cerium rare earth ferrosilicon alloy.

[0052] The composition of the high cerium rare earth ferrosilicon alloy obtained in this embodiment is calculated by mass percentage: RE is 29%, Si is 49.5%, Ca is 0.09%, Al is 0.45%, wherein Ce / RE is 85%, and the rest For Fe.

Embodiment 2

[0054] a. Add water glass to 200kg of ceric rare earth slag to deacidify the ceric rare earth slag to a pH value of 7.5;

[0055] b. Add 56kg of carbon powder and 76kg of alkaline binder to the deacidified ceric rare earth slag, and press it into rare earth pellets;

[0056] c. Put 500kg of silica, 397kg of carbon reducing agent and the above-mentioned rare earth pellets together into the furnace for smelting for 3 hours, take them out of the furnace and cast them, and obtain high-cerium rare earth ferrosilicon alloy.

[0057] The composition of the high cerium rare earth ferrosilicon alloy obtained in this embodiment is calculated by mass percentage: RE is 30.85%, Si is 50.5%, Ca is 0.1%, Al is 0.49%, wherein Ce / RE is 87%, and the rest For Fe.

Embodiment 3

[0059] a. Add water glass to 50kg of ceric rare earth slag to deacidify the ceric rare earth slag to a pH value of 7.2;

[0060] b. Add 13.25kg of carbon powder and 18.25kg of alkaline binder to the deacidified ceric rare earth slag, and press it into rare earth pellets;

[0061] c. Put 120kg of silica, 92kg of carbon reducing agent and the above-mentioned rare earth pellets together into the furnace for smelting for 3 hours, take them out of the furnace and cast them, and obtain high-cerium rare earth ferrosilicon alloy.

[0062] The composition of the high cerium rare earth ferrosilicon alloy obtained in this embodiment is calculated by mass percentage: RE is 30.98%, Si is 50.95%, Ca is 0.09%, Al is 0.48%, wherein Ce / RE is 87.4%, and the rest For Fe.

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Abstract

The invention belongs to the field of metal smelting, and particularly relates to ceric rare earth ferrosilicon alloy and a production method thereof. The technical problems that existing rare earth ferrosilicon alloy is high in production cost, severe in alloy pulverization and low in rare earth yield. According to the technical scheme, the ceric rare earth ferrosilicon alloy comprises, by mass, 29% to 31% of RE, 49% to 51% of Si, smaller than or equal to 0.1% of Ca and smaller than or equal to 0.5% of Al, wherein the content of Ce / RE is larger than or equal to 85%. The invention further provides the production method of the ceric rare earth ferrosilicon alloy. Rare earth elements are used in a balanced mode through the ceric rare earth ferrosilicon alloy produced through the carbothermy method, the utilization rate of rare earth resources in short supply is effectively increased, the circular economy is energetically developed, and the improvement of the rare earth ferrosilicon production technology is promoted.

Description

technical field [0001] The invention belongs to the field of metal smelting, and in particular relates to a high-cerium rare-earth ferrosilicon alloy and a production method thereof. Background technique [0002] Rare earth ferrosilicon alloy is an intermediate alloy composed of rare earth and ferrosilicon. As a deoxidizer, desulfurizer and alloy additive in steel production, it can change the steel matrix, improve the processing performance of steel, and improve the weldability and plasticity of steel. , toughness and other comprehensive mechanical properties, and can increase the wear resistance, pressure resistance, corrosion resistance and bending resistance of steel. Rare earth ferrosilicon is widely used in the foundry industry. In cast steel, rare earth metals can purify molten steel, improve the as-cast structure, improve the fluidity of molten steel, prevent thermal fission and improve the impact toughness of cast steel, etc. Rare earth ferrosilicon is also widely ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C22C38/02C22C33/04C22B1/243C22B5/10
Inventor 陈景友李齐生冯政杜兴芳
Owner LIXIAN MINJIANG RARE EARTH NEW MATERIAL DEV
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