SU1258885A1 - Electrolyte for producing magnesium-calcium alloys - Google Patents

Description

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The invention relates to the electrometallurgy of light metals and can be used in the electrolytic preparation of magnesium-calcium melts from an oxide raw material.

The purpose of the invention is to simplify the process and reduce the cost of production, as well as to reduce the temperature of electrolysis.

The essence of the invention is that the electrolyte additionally contains magnesium oxide at the following content of components, in%: Magnesium oxide 1-10 Calcium oxide 1-5 Calcium chloride Else To reduce the electrolysis temperature, the electrolyte additionally contains potassium chloride at the following content, wt. .%: Potassium Chloride 15-18 Magnesium Oxide 1-10

Calcium oxide 1-5 Calcium chloride Else To reduce the electrolysis temperature, the electrolyte additionally contains calcium fluoride with the following content of components, wt.%: Calcium fluoride 12-14 Magnesium oxide 1-10

Calcium Oxide. 1-5 Calcium Chloride Else The limits of change in the concentration of components in an electrolyte are limited by the following. If the concentration of magnesium oxide in the electrolyte is less than 1%, then loss of calcite increases, which reduces the current output of the alloy. If the concentration of magnesium oxide is greater than 10%, the electrolyte viscosity increases, which also reduces the current output of the alloy. In addition, the electrical conductivity of the electrolyte decreases and the voltage across the cell increases, and consequently, the energy output decreases. If the concentration of calcium oxide in the electrolyte is less than 1%, then the voltage on the electrolyzer increases as a result of the discharge of chlorine anions

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yes on the anode. If the calcium oxide concentration is greater than 5%, the electrolyte viscosity increases, which reduces the current output of the alloy. In addition, the melt's electrical conductivity decreases and the voltage on the electrolyzer rises.

When the potassium chloride content in the electrolyte is less than 15 or more than 18%, the melting point increases. electrolyte increases viscosity and decreases the conductivity of the melt. .This leads to a decrease in the alloy yield for the current and for the increase in voltage 15 and on the electrolyzer. When the content of calcium fluoride in the electrolyte is less than 12 or more than 14%, the melting point of the electrolyte also increases, the alloy output on the current decreases, and the voltage on the electrolyzer increases. .

The electrolyte to produce magnesium-calcium alloys is used as follows.

In the cell load and ras-; melt the electrolyte of one of the following compositions, wt.%: 1, MgO 1-10; , 1-5 CaO; CAC s the rest. 2, KCf ISIS; CaO 1-5; MgO 1-10, CaCl is the strongest, 3. CaF 12-14; CaO 1-5; jiflgO 1-10, CaCfn the rest. Adjust teperapy to the working interval (715-1000 C). Anode and cathode in the form of vertical plates are immersed in the electrolyte. A direct current source is connected, and periodically or continuously, the bulk material is loaded into the electrolyzer, a mixture of magnesium oxides and calcium. As the time of the alloy on the surface of the electrolyte is chosen. . ...

In tab. Figure 1 shows the experimental data on the dependence of the alloy yield on the voltage of the electrolyzer and the composition of the resulting alloy on the concentration of calcium and magnesium oxides in the electrolyte at the process temperature.

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The data on the current output of the alloy, the voltage on the electrolysis cell and the composition of the alloy on the concentration of potassium chloride in the electrolyte with preferable concentrations of magnesium oxide 4.0 wt.% and calcium oxide 2.0 wt.%, CaSS, the rest. The temperature of the electrolysis process 55. which is 55-85 ° lower than when using the first electrolyte composition. ;

Table)

In tab. Figure 3 shows the experimental data on the dependence of the current yield of the alloy, the voltage on the cell and the composition of the alloy on the concentration of calcium fluoride in the electrolyte at preferred concentrations of oxides. magnesium 4.0 wt.% and calcium oxide 2.0 wt.%, CaCf the rest. The temperature of the electrolysis process 7), which is 55-85 lower than at

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using tiepadrd composition elek- rolita.

, bringing to tab. 2 and 3 show that the use of electrolyte tA with the addition of potassium chloride or ftb |) ida allows pampering to be carried out at, which is 55–85 lower than with electrolyte without additives. Split Output Editor A. Kozoriz

Compiled by V. Badovsky

Tehred L. Serdazhovd Proofreader A. Tsko

Order 5091/28 Circulation 615. Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk ab. 4/5

Production and printing company, Uzhgorod, st. Project 4

Continued table. 3

Claims (3)

1. ELECTROLYTE FOR PRODUCTION OF MAGNESIUM-CALCIUM ALLOYS, containing chloride and calcium oxide, characterized in that, in order to simplify the process and reduce self-. the cost of the alloy, it additionally contains magnesium oxide in the following components, wt.%: Magnesium Oxide 1-10 Calcium Oxide 1-5 Calcium Chloride Else 2. The electrolyte according to π. 1, which requires that, in order to reduce the temperature of electrolysis, it additionally contains calcium chloride in the following components, wt.%: Magnesium oxide Calcium oxide Potassium chloride Calcium chloride 3. The electrolyte according to claim ί-10 1-5 15-18 The rest, on the basis of the fact that, in order to reduce the temperature of electrolysis, it additionally contains calcium fluoride in the following components, May.%: Magnesium oxide Calcium Oxide Calcium Fluoride Calcium Chloride Content 1-10 1-5 12-14 Rest t