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Deep deoxidizing agent and method for copper melt

A technology of deep deoxidation and melt, applied in the field of deep deoxidizer and deoxidation of copper melt, can solve the problems of reducing copper conductivity and corrosion performance, adverse effects of copper performance, copper hydrogen-induced cracks, etc., to achieve the best deoxidation effect, improve Comprehensive performance, the effect of reducing the burning loss rate

Active Publication Date: 2020-05-22
YANTAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the copper processing industry has been constantly looking for suitable deoxidation methods. Common deoxidizers include phosphorus, boron, lithium, magnesium, etc. Although these deoxidizers have obvious deoxidation effects, they have the following defects: first, it is difficult to deoxidize completely, Further deoxidation is difficult after the oxygen content is reduced to 100ppm; on the other hand, the deoxidation products of these deoxidizers can adversely affect the properties of copper
Phosphorus deoxidation will reduce the conductivity and corrosion performance of copper. Lithium and boron deoxidation will not affect the conductivity of copper, but will make the copper melt absorb hydrogen again, causing hydrogen-induced cracks in copper

Method used

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  • Deep deoxidizing agent and method for copper melt
  • Deep deoxidizing agent and method for copper melt
  • Deep deoxidizing agent and method for copper melt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 Oxygen content is the deep deoxidation of the copper melt of 33ppm

[0047] A kind of deoxidizer and deoxidation method for copper melt,

[0048] The specific steps are as follows: using cathode electrolytic copper as raw material, using a vacuum melting furnace and a graphite crucible to melt 9.81 kg of copper material at 1220°C. Add a phosphorus-bronze master alloy with a phosphorus content of 9% for pre-deoxidation for 25 minutes, and use a direct-reading spectrometer to detect before the furnace, and the oxygen content of the copper melt is measured to be 33ppm.

[0049] Weigh 0.88g of the deep deoxidizer after ball milling, wherein by weight percentage, neodymium is 3.66%, yttrium is 1.02%, erbium is 0.78%, and europium is 0.54%. And wrap it with copper foil and add it to the copper liquid. After adding it, use a graphite rod to stir quickly for 29 minutes, and then use a slag scoop to remove the slag. The molten copper after slag treatment was left ...

Embodiment 2

[0052] Embodiment 2 Oxygen content is the deep deoxidation of the copper melt of 50ppm

[0053] A method for deep deoxidation of copper melt,

[0054] The specific steps are as follows: using cathode electrolytic copper as raw material, using a vacuum melting furnace and a graphite crucible to melt 9.96 kg of copper material at 1150°C. Add phosphor-bronze master alloy containing 6% phosphorus for pre-deoxidation for 14 minutes, and use a direct-reading spectrometer to detect before the furnace, and the oxygen content of the copper melt is measured to be 50ppm.

[0055] Weigh 3.29g of the deep deoxidizer after ball milling, wherein by weight percentage, neodymium is 4.8%, yttrium is 0.8%, erbium is 2%, and europium is 0.4%. And wrap it with copper foil and add it to the copper liquid. After adding, use a graphite rod to stir quickly for 25 minutes, and then use a slag scoop to remove the slag. The molten copper after the slag treatment was left to stand for 52 minutes, and th...

Embodiment 3

[0058] Embodiment 3 Oxygen content is the deep deoxidation of the copper melt of 50ppm

[0059] A method for deep deoxidation of copper melt,

[0060] The specific steps are as follows: using cathode electrolytic copper as raw material, using a vacuum melting furnace and a graphite crucible to melt 9.77 kg of copper at 1220°C. Add phosphor-bronze master alloy containing 7% phosphorus for pre-deoxidation for 17 minutes, and use a direct-reading spectrometer to detect before the furnace, and the oxygen content of the copper melt is measured to be 50ppm.

[0061] Weigh 4.23g of the deep deoxidizer after ball milling, wherein by weight percentage, neodymium is 6.2%, yttrium is 1.5%, erbium is 1.9%, and europium is 0.4%. And wrap it with copper foil and add it to the copper liquid. After adding, use a graphite rod to stir quickly for 27 minutes, and then use a slag scoop to remove the slag. After the slag treatment, the molten copper was left to stand for 54 minutes, and then the...

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Abstract

The invention relates to a deep deoxidizing agent and method for copper melt, in particular to a deep deoxidizing agent and method for oxygen-free copper. The technological method is characterized inthat a cathode electrolytic copper plate is melted in a vacuum melting furnace at 1,100-1,250 DEG C, firstly, a phosphor copper intermediate alloy is added for preliminary deoxidization, then the deoxidizing agent is added for deep deoxidization, and finally, the oxygen content of the copper material can be lower than 20 ppm. The deoxidizing agent is prepared from chemical components including, byweight, 3%-10.5% of neodymium, 0.5%-3% of yttrium, 0.5%-4.5% of erbium, 0.15%-1.5% of europium and the balance copper. The deoxidizing agent is required to be mechanically crushed firstly before being used, then is ball-milled by the aid of a ball mill to be in the particle size ranging from 100 mu m to 300 mu m and is added to the copper melt after being coated by copper foil, after addition, the deoxidizing agent is quickly stirred for 20-30 min by the aid of a graphite rod, and a copper material is cast after slag fishing. Compared with traditional deoxidizing agents and methods for the oxygen-free copper, the method has the advantages that the method is high in deoxidizing efficiency, easy to operate and low in labor cost, and the deep deoxidizing purpose can be achieved.

Description

technical field [0001] The invention relates to a deoxidizer and a deoxidation method used in the field of nonferrous metals, in particular to a deoxidizer and a deoxidizer for copper melts. Background technique [0002] Oxygen in copper is mainly in the form of cuprous oxide (Cu 2 O) exists in the form of Cu 2 The solubility of O in copper melt increases with the increase of temperature, after solidification Cu 2 O to Cu-Cu 2 The eutectic form of O exists in the same China, the eutectic temperature is very high, up to 1065 ° C, and Cu 2 O is a brittle phase, which will cause cracking of copper material during cold working, resulting in cold brittleness and making the surface of copper processed material rough and uneven. The copper melt itself has oxygen absorption characteristics, and its oxygen absorption capacity increases with the increase of temperature. When melting and casting copper materials in the rainy season or humid coastal environment, the presence of trac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/02C22C9/00
CPCC22C1/02C22C1/06C22C9/00
Inventor 李海红刘晓王茜茜张明刘丽张新涛
Owner YANTAI UNIV
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