Novel boron compound-containing aluminium alloy deironing flux

An aluminum alloy and flux technology is applied in the field of new boron-containing aluminum alloy iron removal flux, which can solve the problems of easy sinking to the bottom of the crucible, unsatisfactory removal effect, and easy adhesion to the crucible, etc. Less, lower iron content, low cost effect

Active Publication Date: 2014-09-24
SHANGHAI ZHONGCAI ENG DETECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is an important problem in the process of scrap aluminum recycling and production: there are many kinds of impurities in scrap, and the impurity iron is a serious problem, because the aluminum alloy standard requires extremely low limit content of iron element
It uses the extrusion force generated by the external electromagnetic field because the conductivity of the iron-rich phase is much smaller than that of the aluminum melt to separate the iron phase impurities in the aluminum melt, but it must be added after adding alloy elements (such as: Mn , Zr, etc.) on the basis of the pre-precipitation of the iron-rich phase in the melt, it can be successfully removed by electromagnetic field, and the iron

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0009] Example 1:

[0010] The sodium chloride (NaCl), potassium chloride (KCl), cryolite (NaCl) 3 AlF 6 ), sodium fluoride (NaF), boric acid (H 3 BO 3 ) Put them into a stainless steel container, put them into an oven, heat up to 250°C, keep them warm for 3 hours, and then take them out for use. Accurately weigh each component according to the flux formula, sodium chloride (NaCl) 20 kg, potassium chloride (KCl) 20 kg, cryolite (NaCl) 3 AlF 6 ) 10 kg, sodium fluoride (NaF) 10 kg, boric acid (H 3 BO 3 ) 40 kg, put it into a ball mill, and mix the ball mill at a speed of 250 rpm for 1.5 hours, take out the mixed flux and package it in a closed container.

[0011] Before use, the flux is baked at 100°C for about 1 hour, and the iron removing flux of the present invention is added in the aluminum alloy melting furnace according to 1% of the weight of the aluminum alloy solution, and then the flux is allowed to stand for 40 minutes after refining. When used in an aluminum alloy with an ...

Example Embodiment

[0012] Example 2:

[0013] The sodium chloride (NaCl), potassium chloride (KCl), cryolite (NaCl) 3 AlF 6 ), sodium fluoride (NaF), boric acid (H 3 BO 3 ) Put them into a stainless steel container, put them into an oven, heat up to 300°C, keep them warm for 4 hours, and then take them out for later use. Accurately weigh each component according to the flux formula, sodium chloride (NaCl) 20 kg, potassium chloride (KCl) 20 kg, cryolite (NaCl) 3 AlF 6 ) 15 kg, sodium fluoride (NaF) 15 kg, boric acid (H 3 BO 3 ) 30 kg, put it into a ball mill, and mix the ball mill at a speed of 250 rpm for 2 hours, take out the mixed flux and package it in a closed container.

[0014] Before use, the flux is baked at 100° C. for about 1 hour, and the iron removal flux of the present invention is added in the aluminum alloy melting furnace at 2% of the weight of the aluminum alloy solution, and then the flux is allowed to stand for 30 minutes after refining. When used in aluminum alloy with 0.5% iron c...

Example Embodiment

[0015] Example 3:

[0016] The sodium chloride (NaCl), potassium chloride (KCl), cryolite (NaCl) 3 AlF 6 ), sodium fluoride (NaF), boric acid (H 3 BO 3 ), boron carbide (B 4 C) Put them into a stainless steel container, put them into an oven, heat up to 250°C, keep them warm for 2 hours, and then take them out for use. Accurately weigh each component according to the flux formula, sodium chloride (NaCl) 20 kg, potassium chloride (KCl) 20 kg, cryolite (NaCl) 3 AlF 6 ) 15 kg, sodium fluoride (NaF) 15 kg, boric acid (H 3 BO 3 ) 25 kg, boron carbide (B 4 C) 5 kg, put it into a ball mill, and mix the ball mill at a speed of 250 rpm for 2 hours, take out the mixed flux and package it in a closed container.

[0017] Before use, the flux is baked at 100°C for about 1 hour, and the iron removal flux of the present invention is added in the aluminum alloy melting furnace at 2% of the weight of the aluminum alloy solution, and then it is refined and allowed to stand for 60 minutes. When used ...

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Abstract

The invention provides aluminium alloy deironing flux, which is characterized by comprising the following components by weight: 10-20% of sodium chloride (NaCl), 10-20% of potassium chloride (KCl), 10-20% of cryolite (Na3AlF6), 10-20% of sodium fluoride (NaF), 30-40% of boric acid (H3BO3) and/or boron carbide (B4C). The purifying flux provided by the invention has the advantages of continuous deironing, convenient operation and the like, and can effectively remove iron element in aluminium melt. When in use, the boron compounds in the flux react with the impurity of iron element to form high-melting point boron iron compounds which are captured by slag and mixed with the slag, so as to effectively reduce the iron content in aluminium alloy. The flux is suitable for melting requirements of aluminium alloy, has excellent viscosity and surface tension, and is good in separability from aluminium. The flux is good in chemical stability and less in harmful gas amount, and meets industrial hygienic standards and exhaust gas discharge standards. In addition, the flux is convenient to add, simple in operation process, and low in cost.

Description

technical field [0001] The invention relates to a flux in the technical field of nonferrous metallurgy, which uses a boride-containing flux to purify an aluminum alloy melt, especially a new type of boron-containing compound-containing aluminum alloy iron-removing flux capable of removing impurity iron . Background technique [0002] Aluminum and its alloys have low density, corrosion resistance, certain strength, good plasticity, and can be processed in various ways. They are widely used in various industrial sectors such as construction, electronics, machinery manufacturing, aerospace, and petrochemicals. At present, the production cost of primary aluminum is getting higher and higher, so the recycling of waste aluminum has become an important development direction of the current aluminum industry. There is an important problem in the process of scrap aluminum recycling and production: there are many kinds of impurities in scrap, and the impurity iron is a serious problem...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C21/00
Inventor 高建卫
Owner SHANGHAI ZHONGCAI ENG DETECTION CO LTD
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