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Potassium-sodium-calcium-barium mixed chlorine salt and preparation method and application thereof

A technology of chloride salt and magnesium alloy, which is applied in the field of potassium-sodium-calcium-barium mixed chloride salt material and its preparation, can solve problems such as unsatisfactory results, and achieve the effect of simple method, good control precision and low cost

Inactive Publication Date: 2016-06-15
鄂尔多斯市紫荆创新研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional experiments, the optimal Mg content can be controlled by controlling smelting parameters, such as increasing the amount of Mg, argon pressure, volatilization temperature and time. Although the control accuracy has been improved compared with the above method, the result is still unsatisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The concrete implementation steps of the preparation method of described K-Na-Ca-Ba mixed chlorine salt material are as follows:

[0019] 1) Weigh a certain amount of potassium, sodium, calcium, and barium in proportion, grind them into powder, and the powder degree is required to be not less than 5 mesh, and then mix evenly;

[0020] 2) Put the crucible with the powder in the muffle furnace, slowly raise the temperature of the furnace to 900°C at 5°C-20°C / min for melting, and it takes 80-120 minutes for complete melting. After it is completely melted, take it out and cool it in the air, and then seal it up for later use, which is called a covering agent.

[0021] The K-Na-Ca-Ba mixed chloride salt material solves the method for Mg volatilization of magnesium alloys in the vacuum smelting process:

[0022] 1) Before smelting the magnesium alloy, put the covering agent in the muffle furnace and preheat it at 200°C;

[0023] 2) After the preheating is completed, the cov...

Embodiment 1

[0027] The melting equipment is a 50g vacuum induction melting furnace, and the power frequency is 2500Hz. First prepare La 0.75 Mg 0.25 Ni 3.5 Hydrogen storage alloy, wherein the purity of La, Mg and Ni are 99.5%, 99.95% and 99.5% respectively. Calculated according to the total amount of 25g in one furnace, the masses of La, Mg, and Ni added are 8.2915g, 0.4815g, and 16.3494g, respectively. In a vacuum of 4×10 -3 The smelting is carried out under the condition of smelting. After the smelting is completed and the alloy is cooled, it is found by ICP detection that the content of Mg in the alloy is 0.4083g, and the mass loss is nearly 15.2%.

[0028] Weigh 0.3420 g, 0.4613 g, 0.6840 g, and 0.7628 g of reagents containing four chlorine salts of K, Na, Ca, and Ba, and the total amount is 2.2491 g. The purity of the four chlorine salts is required to be greater than 99.0%. Grind the four kinds of chlorine salts into powder, the required powder size is not less than 5 mesh, an...

Embodiment 2

[0030] The melting equipment is a 50g vacuum induction melting furnace, and the power frequency is 2500Hz. First prepare La 0.75 Mg 0.25 Ni 3.5 Hydrogen storage alloy, wherein the purity of La, Mg and Ni are 99.5%, 99.95% and 99.5% respectively. Calculated according to the total amount of 30g in one furnace, the masses of La, Mg, and Ni added are 9.9498g, 0.5779g, and 19.6193g, respectively. In a vacuum of 4×10 -3 Smelting is carried out under the condition of smelting, and after the alloy is cooled after the smelting is completed, it is found by ICP detection that the content of Mg in the alloy is 0.4877g, and the mass loss is nearly 15.6%.

[0031] Preheat the covering agent with a quality of 0.750g for storage and then break it into blocks smaller than 10mm. -3 Mixing and smelting directly under the conditions. After the alloy is cooled after smelting, wash off the salt coating on the surface of the alloy with clean water, and dry it with an electric heat gun. Through...

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Abstract

The invention provides a potassium-sodium-calcium-barium mixed chlorine salt material and a preparation method and application of the potassium-sodium-calcium-barium mixed chlorine salt material and belongs to the field of metal material preparation. The material is composed of, by weight percentage, 10%-17% of K, 15%-20% of Na, 25%-35% of Ca and 30%-35% of Ba. The preparation method includes the steps that firstly, potassium, sodium, calcium and barium chlorine salt are ground into powder to be evenly mixed; and secondly, crucibles with the powder are placed in a muffle furnace to melt the powder, and the crucibles are sealed and stored for use after being quickly cooled. The method for solving the problem of volatilization of a magnesium alloy in the vacuum smelting process through the mixed chlorine salt material includes the steps that firstly, a covering agent is placed into the muffle furnace to be preheated before the magnesium alloy is smelted; secondly, the covering agent is broken into blocks after being preheated to be directly mixed and fused with the magnesium alloy under the vacuum state; and thirdly, the mixed chlorine salt covering agent is washed away with clean water after the alloy is smelted. The potassium-sodium-calcium-barium mixed chlorine salt material and the preparation method and application of the potassium-sodium-calcium-barium mixed chlorine salt material have the beneficial effects that control accuracy is good, the method is simple, operation is convenient and cost is low. The potassium-sodium-calcium-barium mixed chlorine salt material is expected to effectively solve the problem of volatilization of Mg in the following experiment and production processes.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, specifically a potassium-sodium-calcium-barium mixed chloride salt material and its preparation method and application. The application---use the mixed chlorine salt to solve the problem of Mg volatilization in the vacuum smelting process Methods. Background technique [0002] During the vacuum melting process, the volatilization of alloying elements will make the control of alloy composition difficult. It is well known that in an alloy melt, when the equilibrium vapor partial pressure of the components is higher than their vapor partial pressure on the melt surface, the components will be evaporated and removed from the melt. However, Mg has a high vapor pressure at high temperature, so it has a great volatilization tendency, and there are many factors affecting Mg volatilization in the vacuum induction melting process, so that it is difficult to achieve the best Mg control. ...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C1/02C22C23/00
CPCC22C1/02C22C1/06C22C23/00
Inventor 易汉平于荣海韩珩王博
Owner 鄂尔多斯市紫荆创新研究院
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