Nickel iron intermediate alloy and melting and purification treatment method thereof
An intermediate alloy and purification treatment technology, applied in the field of alloy manufacturing, can solve the problems of unsuitable smelting of low thermal expansion nickel-iron alloy, low purity of nickel-iron, high impurity content of nickel-iron, etc. The effect of uniform composition
Active Publication Date: 2010-09-08
AVIC SHANGDA METAL REGENERATION TECH
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Problems solved by technology
The ferronickel smelted by this method also has the problem of high impurity content because the ore brings more impurities and no corresponding purification treatment measures are taken during the smelting process; and the nickel ferronickel smelted by this method Due to the low purity of iron, it is also not suitable for smelting the above-mentioned low thermal expansion nickel-iron alloy, so its application range is limited
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[0030] FIG. 1 shows the structure of an induction smelting purification treatment furnace for implementing the present invention. The furnace is mainly composed of an intermediate frequency furnace 10 and a powder spraying device 20 .
[0031] The intermediate frequency furnace 10 is mainly composed of a crucible 11 , a furnace shell 12 , an induction coil 16 and a variable frequency power supply 17 . A hollow seat brick 13 is installed at the middle position of the bottom wall of the intermediate frequency furnace. Qi; in the hollow hole of seat brick 13, air-permeable brick 14 is housed, and the top surface of this air-permeable brick 14 is higher than the furnace chamber bottom surface of intermediate frequency furnace 10 a short distance, and the bottom surface of this air-permeable brick 14 is higher than the bottom furnace shell of intermediate frequency furnace 10 For a short distance, there is a stepped blind hole 18 for containing gas at the bottom of the gas permeabl...
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Abstract
The invention discloses a smelting and purifying treatment method for nickel-iron intermediate alloys. The method comprises the following technological steps in order to obtain the nickel-iron intermediate alloy with uniform compositions and high purity: a waste alloy material which is formed by waste ferronickel, waste nickel materials and waste iron materials after mixture undergoes charging and smelting, slagging and desulfurization, addition of a deoxidant for deoxidization, argon stirring, manufacture of novel slag through reduction refining and deoxidization, powder spraying and dephosphorization, adjustment of the compositions of the alloy, and discharging and casting. The invention also discloses series nickel-iron intermediate alloys which are manufactured by the method, namely SD-Ni12, SD-Ni13, SD-Ni14, SD-Ni15, SD-Ni16, SD-Ni17 and SD-Ni18. The alloys are pure, have uniform compositions, and are suitable to be used for smelting high-quality alloy materials containing nickeland iron.
Description
technical field [0001] The invention relates to a method for producing alloys by smelting and purifying waste materials, in particular to a method for producing nickel-iron master alloys after smelting and purifying waste materials in an intermediate frequency induction furnace. [0002] The invention also relates to a nickel-iron master alloy with uniform composition and high purity obtained after smelting and purifying treatment by the above method. Background technique [0003] Nickel-iron master alloys are mainly used in metal materials containing nickel and iron as base alloys and additives in the smelting process. The nickel-iron master alloys require uniform chemical composition, small segregation, no visible non-metallic inclusions, low gas content, and impurity content. Must meet the requirements of the metal material being smelted. Nickel-iron master alloys produced from waste nickel-iron, waste nickel, scrap iron, etc. are generally smelted and produced by interm...
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IPC IPC(8): C22C35/00C22C38/16C22C33/04C21C7/064
CPCY02P10/20
Inventor 栾东海
Owner AVIC SHANGDA METAL REGENERATION TECH