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Refining agent for copper and copper alloy smelting

A refining agent and copper alloy technology, which is applied to the composition of new refining agents for copper and copper alloy smelting and their preparation fields, can solve the problem of difficulty in meeting high-quality copper and copper alloy products, reducing copper conductivity, and expensive lithium melts and other problems, to achieve the effect of accelerating the adsorption of inclusions, large surface tension, and ensuring composition and performance

Active Publication Date: 2014-05-14
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, methods for removing hydrogen during refining of copper and copper alloys include inert gas dehydrogenation, oxidation dehydrogenation and flux dehydrogenation, etc., but there are problems such as high cost and low efficiency of dehydrogenation equipment
Common deoxidation methods include phosphorus, lithium, boron, magnesium, etc., and the presence of phosphorus during deoxidation will strongly reduce the conductivity of copper. Lithium is expensive and easy to re-absorb hydrogen from the melt. The deoxidation effect of boron is poor, and magnesium causes inclusions. Dehydrogenation and deoxidation refining technologies for copper are difficult to meet the requirements of high-quality copper and copper alloy products

Method used

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  • Refining agent for copper and copper alloy smelting
  • Refining agent for copper and copper alloy smelting
  • Refining agent for copper and copper alloy smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to 10 wt.% calcium fluoride, 2.5 wt.% silicon dioxide, 2.5 wt.% titanium dioxide, 4 wt.% sodium fluorosilicate, 46 wt.% sodium carbonate, the balance is the weight of sodium tetraborate The percentages are used to prepare the refining agent of the present invention.

[0027] After mixing the above refining agents evenly, put them into the drying box, at 120 o C, dry for one hour; then use a metallographic inlay machine to manually press the refining agent of the present invention into a sheet; wrap it with copper foil for future use.

Embodiment 2

[0030] According to 10 wt.% calcium fluoride, 2.5 wt.% silicon dioxide, 2.5 wt.% titanium dioxide, 10 wt.% sodium fluorosilicate, 40 wt.% sodium carbonate, the balance is the weight of sodium tetraborate The percentages are used to prepare the refining agent of the present invention.

[0031] The refining agent preparation and use process are the same as in Example 1.

Embodiment 3

[0033] According to 10 wt.% calcium fluoride, 2.5 wt.% silicon dioxide, 2.5 wt.% titanium dioxide, 2 wt.% sodium fluorosilicate, 48 wt.% sodium carbonate, the balance is the weight of sodium tetraborate The percentages are used to prepare the refining agent of the present invention.

[0034] The refining agent preparation and use process are the same as in Example 1.

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Abstract

A refining agent for copper and copper alloy smelting is characterized in that the components of the refining agent are 5 to 15 percent by weight of calcium fluoride, 1 to 5 percent by weight of silicon dioxide, 1 to 5 percent by weight of titanium dioxide, 2 to 10 percent by weight of sodium fluosilicate, 40 to 60 percent by weight of sodium carbonate and the balance sodium tetraborate; the refining agent materials are weighed according to a formula, uniformly mixed, placed into a drying box and dried under 120 DEG C for an hour, and a metallographic inlaying machine is used for manually pressing the refining agent into the shape of a sheet. The refining agent has the advantages that the refining agent is integrated with the functions of deoxidization, degasification, impurity removal and the like, and has strong adsorbing, dissolving and combination slagging capabilities; the surface tension between the refining agent and metal melt is high, the refining agent can promote molten slag to float up, so that the molten slag can be better separated from molten metal, and thereby the effects of refining, impurity removal and melt purification are achieved; the refining agent has high chemical stability and thermal stability, does not have the corrosion effect on metal and the furnace lining, and cannot chemically react with the molten metal, the refining agent and the molten metal cannot be melted into each other as well, and thereby the original composition and properties of alloy are guaranteed; and the refining agent does not have public hazard, is safe and environment-friendly, is convenient to use, and is cheap.

Description

technical field [0001] The invention belongs to the technical field of copper and copper alloy processing, and relates to a composition of a novel refining agent for smelting copper and copper alloys and a preparation method thereof. Background technique [0002] Copper and copper alloys often contain impurity elements such as hydrogen, oxygen, sulfur, lead, bismuth and arsenic during the smelting process. These impurity elements have a great influence on the thermal conductivity and processing performance of copper. For example, oxygen and sulfur are easy to cause "cold brittleness" of castings, lead and bismuth are easy to cause "hot brittleness" of materials, and hydrogen is the most common and most harmful gas in copper, which will cause a large number of foaming in the pipe and cause serious quality accidents. [0003] Adding an appropriate amount of refining agent during the smelting process of copper and copper alloy can play the role of degassing, slag removal and gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/14
Inventor 谭敦强詹益街杨小霞陈强刘阳
Owner NANCHANG UNIV
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