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Deslagging smelting flux for smelting casting zinc alloy and preparation method thereof

A zinc alloy and flux technology, which is applied in the field of slag removal, refining flux and its preparation, can solve the problems of deteriorating working environment, increased alloy melting loss rate, and difficulty in obtaining zinc alloy structure, so as to improve casting performance, wear resistance and Improved corrosion resistance and improved fluidity

Active Publication Date: 2013-08-28
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, a large amount of smoke and toxic and corrosive gases are produced, which deteriorates the working environment and increases the melting loss rate of the alloy. It is difficult to obtain a zinc alloy with a dense structure, no slag, no bubbles and inclusions.

Method used

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  • Deslagging smelting flux for smelting casting zinc alloy and preparation method thereof
  • Deslagging smelting flux for smelting casting zinc alloy and preparation method thereof
  • Deslagging smelting flux for smelting casting zinc alloy and preparation method thereof

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example 1

[0023]

[0024]

example 2

[0026]

example 3

[0028]

[0029] The rare earth oxide is lanthanum oxide, cerium oxide or praseodymium oxide, or a composition of the three oxides:

[0030] The weight content of lanthanum oxide is 20%-30%,

[0031] The weight content of cerium oxide is 65%-75%,

[0032] The weight content of praseodymium oxide is 2%-5%.

[0033] The preparation method of the slag-removing and refining flux for casting zinc alloy smelting comprises the following steps:

[0034] a) mixing sodium chloride, potassium chloride, sodium fluoroaluminate, sodium fluorosilicate and sodium fluoride at a temperature of 95°C-125°C and normal pressure for 45 minutes to form a uniform dry powder mixture;

[0035] b) Add sodium nitrate, sodium carbonate and rare earth oxides to the mixture, mix and stir for 30 minutes at a temperature of 85°C-100°C and normal pressure;

[0036] c) natural cooling and stirring for 20 minutes.

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Abstract

The invention relates to a deslagging smelting flux for smelting a casting zinc alloy and a preparation method thereof. The flux is prepared by adding ultramicrofine rare earth oxide into powder mainly comprising sodium chloride, potassium chloride, sodium fluoroaluminate, sodium fluosilicate, sodium nitrate, sodium carbonate and sodium fluoride, and stirring, dehydrating and curing the materials. By using the flux, the zinc alloy fluid can be effectively purified, the liquidity and casting property can be improved, grains in a zinc alloy casting structure can be refined, and the second phase can be dispersed and separated out in the crystal, so that the strength, hardness, abrasive resistance and corrosion resistance of the zinc alloy are improved, and the defect that the environment is seriously polluted by a great amount of harmful gas and smoke dust produced by the conventional deslagging smelting flux for smelting zinc alloy is effectively overcome.

Description

technical field [0001] The invention relates to a slag-removing and refining flux used for purifying zinc alloy melt during the smelting process of cast zinc alloy and a preparation method thereof. Background technique [0002] The smelting process of cast zinc alloy is divided into melting, adjusting composition, slag removal and refining, modification treatment, adjusting temperature and pouring. Due to the uncleanness of the charge, the heated surface of the charge is oxidized, resulting in scum or slag on the surface of the molten zinc alloy, which is a mixture of metal oxides and foreign impurities involved. This scum and inclusions and gases dispersed in the melt must be removed to ensure the purity of the casting structure. Therefore, slag removal and refining is a necessary purification process. Generally, purification methods such as static clarification, chlorine salt treatment, inert gas blowing and filtration are used. At present, the most widely used and most...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C18/00
Inventor 吴炳尧修毓平
Owner SOUTHEAST UNIV
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