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Smelting method of nickel-magnesium alloy

A nickel-magnesium alloy and alloy liquid technology, which is applied in the field of nickel-magnesium alloy smelting, can solve the problems of high cost, no protective effect, difficult gas storage, etc., to reduce production costs, solve the problem that magnesium is easy to oxidize, and the process is simple and feasible. Effect

Inactive Publication Date: 2019-02-01
YUZHOU HENGLILAI ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the smelting process of nickel-magnesium alloys, due to the very active chemical properties of magnesium, it is flammable; the oxide film formed on the surface of the magnesium alloy melt in the air is loose and porous, and has no protective effect. Therefore, in the smelting and casting process of magnesium alloys , the flame retardant and anti-oxidation protection of the magnesium alloy melt must be carried out. At present, there are three commonly used methods at home and abroad: solvent protection method, gas protection method and alloy flame retardant method; Volatile produces HCl, Cl 2 and other toxic gases; the gas protection method has problems such as difficulty in gas storage, easy to cause environmental pollution and high cost; the addition of flame-retardant alloys will increase production costs. Therefore, there is an urgent need for an efficient and environmentally friendly nickel-magnesium alloy smelting method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for smelting nickel-magnesium alloys. Magnesium ingots and returned materials are added to an intermediate frequency induction furnace. The amount of magnesium ingots added is 15% of the total smelted weight, and the amount of returned materials added is 5% of the total smelted weight. Specifically, adding For magnesium ingots, add the returned charge above the magnesium ingot; then cover the magnesium ingot and the returned charge with 1.2% of the total smelting weight of calcium fluoride and 0.5% of petroleum coke recarburizer, the purity of calcium fluoride is not less than 98% , the recarburizer is a petroleum coke recarburizer whose fixed carbon is not less than 95%, and the particle size of the recarburizer is 1-6mm; heat with a power of 150kw for 8min, and after the magnesium ingot and the returned charge are completely melted, increase the power of the electric furnace Up to 230kw, add nickel block, the amount of nickel block added is 80% of the total sm...

Embodiment 2

[0019] A method for smelting nickel-magnesium alloys. Magnesium ingots and returned materials are added to an intermediate frequency induction furnace. The amount of magnesium ingots added is 65% of the total smelted weight, and the amount of returned materials added is 5% of the total smelted weight. Specifically, adding For magnesium ingots, add the returned charge above the magnesium ingot; then cover the magnesium ingot and the returned charge with 1.7% of the total smelting weight of calcium fluoride and 1% of petroleum coke recarburizer, the purity of calcium fluoride is not less than 98% , the recarburizer is a petroleum coke recarburizer whose fixed carbon is not less than 95%, and the particle size of the recarburizer is 1-6mm; heat with a power of 200kw for 8min, and after the magnesium ingot and the returned charge are completely melted, increase the power of the electric furnace Up to 280kw, add nickel block, the amount of nickel block added is 30% of the total smel...

Embodiment 3

[0021] A method for smelting nickel-magnesium alloys. Magnesium ingots and returned materials are added to an intermediate frequency induction furnace. The amount of magnesium ingots added is 45% of the total smelted weight, and the amount of returned materials added is 5% of the total smelted weight. For magnesium ingots, add the returned materials above the magnesium ingots; then cover the magnesium ingots and returned materials with 1.5% calcium fluoride and 0.8% petroleum coke recarburizer of the total smelting weight, the purity of calcium fluoride is not less than 98% , the recarburizer is a petroleum coke recarburizer whose fixed carbon is not less than 95%, and the particle size of the recarburizer is 1-6mm; heat with a power of 180kw for 8min, and after the magnesium ingot and the returned material are completely melted, increase the power of the electric furnace Up to 250kw, add nickel block, the amount of nickel block added is 50% of the total smelting weight. The ad...

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PUM

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Abstract

The invention belongs to the technical field of alloy smelting and particularly relates to a smelting method of a nickel-magnesium alloy. The smelting method of the nickel-magnesium alloy comprises the following steps that magnesium ingots and returns are fed into a medium-frequency induction furnace, specifically, the magnesium ingots are fed first of all, and then the returns are fed to the upper sides of the magnesium ingots; the magnesium ingots and the returns are covered by calcium fluoride and carburant, wherein the calcium fluoride accounts for 1.2%-1.7% of the total smelting weight, and the carburant accounts for 0.5%-1.0% of the total smelting weight; heating is conducted for 8-10 min at the power of 150-250 kw, and after all the magnesium ingots and returns are completely molten, nickel blocks are added; heating continues at the power of 230-280 kw until all the nickel blocks are completely molten, stirring is then conducted, a crucible is tilted twice front and back, and electrified pouring is conducted on the mixture at the discharge temperature of 1290-1330 DEG C. The smelting method of the nickel-magnesium alloy has the advantages of being simple in technology, efficient in production, environmentally friendly, low in production cost and the like.

Description

technical field [0001] The invention belongs to the technical field of alloy smelting, and in particular relates to a nickel-magnesium alloy smelting method. Background technique [0002] Due to its high cost performance, nodular cast iron occupies an important position in the material market. Nodularizer is one of the main means to obtain nodular iron. As a kind of nodularizer, nickel-magnesium alloy plays an important role in the production of nodular iron. status. However, during the smelting process of nickel-magnesium alloys, due to the very active chemical properties of magnesium, it is flammable; the oxide film formed on the surface of the magnesium alloy melt in the air is loose and porous, and has no protective effect. Therefore, in the smelting and casting process of magnesium alloys , the flame retardant and anti-oxidation protection of the magnesium alloy melt must be carried out. At present, there are three commonly used methods at home and abroad: solvent prot...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C1/06C22C19/03C22C23/00
CPCC22C1/02C22C1/023C22C1/06C22C19/03C22C23/00
Inventor 王帅领闫启栋张宗帅李建峰
Owner YUZHOU HENGLILAI ALLOY CO LTD