Shenzhen Sunxing Light Alloys Materials Co., Ltd.

Weiping Wu

Jun Yang

Xuemin Chen

Zhihong Li

Shiming Wei

Fengqin Niu

The disclosure provides a method for preparing an electrolyte and an electrolyte replenishment system during an electrolytic process. The method includes the following steps: Step A: placing aluminum in a reactor, vacuumizing the reactor and feeding an inert gas, heating the reactor to 700-850 degrees centigrade, and adding one or more of potassium fluozirconate, potassium fluoborate, sodium hexafluorozirconate and sodium fluoroborate; and Step B: stirring the reactants for 4-6 hours and extracting the upper molten liquid to obtain an electrolyte replenishment system during an aluminum electrolysis process. The disclosure has the following beneficial effects: when used in the aluminum electrolysis industry, the electrolyte system provided herein can be directly used as an aluminum electrolyte or a replenishment system in an electrolyte without changing existing electrolysis technology to significantly reduce an electrolysis temperature during an aluminum electrolysis process.

Method for preparing an electrolyte and an electrolyte replenishment system during aluminum electrolysis process

The invention provides a potassium cryolite for aluminum electrolysis industry, which has a molecular formula: mKF.AlF, wherein m is from 1 to 1.5. The low-molecular-ratio potassium cryolite (mKF.AlF, and m is from 1 to 1.5) provided by the invention is used for aluminum electrolysis industry, and can improve the dissolvability of aluminum oxide, thus reducing the temperature of electrolysis and the consumption of power, raising the efficiency of electrolysis and lowering the comprehensive production cost.

Potassium cryolite for aluminum electrolysis industry and preparation method thereof

A method for preparing zirconium boride and synchronously preparing a cryolite is provided which includes the following steps: Step A: placing aluminum in a reactor, heating the reactor to 700-850 degrees centigrade, and adding the mixture of fluorozirconate and fluoborate; and Step B: stirring the reactants for 4-6 hours and extracting the upper molten liquid to obtain a cryolite, wherein the lower substance is zirconium boride. The disclosure has the following beneficial effects: the new zirconium boride preparation method provided herein is simple in preparation flow and the device used, short in preparation period and high in reaction efficiency, the prepared zirconium boride with many contact angles has a large specific surface area and contains a controllable amount of aluminum.

Method for preparing zirconium boride and synchronously preparing cryolite

The disclosure provides low-molecular-ratio cryolite for aluminum electrolytic industry, which consists of potassium cryolite and sodium cryolite with a mole ratio of 1:1&#x2dc;1:3, wherein the molecular formula of the potassium cryolite is mKF.AlFand the molecular formula of the sodium cryolite is nNaF.AlF, where m=1&#x2dc;1.5 and n=1&#x2dc;1.5. When the low-molecular-ratio cryolite provided by the disclosure is applied to the aluminum electrolytic industry, electrolytic temperature and power consumption can be reduced and electrolytic efficiency is improved.

Low-molecular-ratio cryolite for aluminium electrolytic industry and method for preparing the same

The disclosure provides an electrolyte supplement system in an aluminum electrolysis process, which includes low-molecular-ratio cryolite, wherein the low-molecular-ratio cryolite is selected from mKF.AlF, nNaF.AlFor mixture thereof, where m=1&#x2dc;1.5 and n=1&#x2dc;1.5. When the electrolyte supplement system provided by the disclosure is applied to the aluminum electrolytic industry, electrolytic temperature can be reduced obviously in the aluminum electrolysis process without changing the existing electrolytic process; thus, power consumption is reduced, volatilization loss of fluoride is reduced and the comprehensive cost of production is reduced.

Electrolyte supplement system in aluminium electrolysis process and method for preparing the same

A method for preparing an aluminum-zirconium-boron alloy and synchronously preparing a cryolite is provided. The method includes the following steps: Step A: placing aluminum in a reactor, heating the reactor to 700-850 degrees centigrade, and adding a mixture consisting of fluorozirconate and fluoborate in a molar ratio of x: y into the reactor; Step B: stirring the reactants for 4-6 hours and extracting the upper molten liquid to obtain a cryolite, wherein the lower substance is an aluminum-zirconium-boron alloy, and aluminum is added in an excess amount. The method provided herein for preparing an aluminum-zirconium-boron alloy which is mild in reaction condition, easy to control and simple in technical flow can prepare a high-quality product through a complete reaction, besides, the use of the synchronously prepared low molecular ratio cryolites (KF.AlFand NaF.AlF) in the aluminum electrolysis industry can achieve a proper electrical conductivity.

Method for preparing aluminum-zirconium-boron alloy and synchronously preparing crylite

The invention provides a preparation process of transition metal boride, comprising the following steps: A) aluminum is put in a reactor, inert gas is fed into the reactor after evacuation, the reactor is heated up to 700 to 800&#xb0; C. and then added with dry potassium fluoborate or sodium fluoborate, monomer boron and cryolite are generated by rapid stirring and reaction for 4 to 6 hours, and the molten liquid at the upper layer is sucked out and the monomer boron is obtained by means of separation; and B) the obtained monomer boron is added with transition metal for reaction at the temperature from 1800 to 2200&#xb0; C. in order to generate corresponding transition metal boride.

Preparation process of transition metal boride and uses thereof

The invention provides a preparation method for producing metal zirconium industrially and producing low-temperature aluminum electrolyte as byproduct, which comprises the following steps: A) aluminum and fluorozirconate are put in a closed reactor, inert gas is fed into the reactor after evacuation, the reactor is heated up to 780&#xb0; C. to 1000&#xb0; C. and then the mixture in the reactor is stirred rapidly; and B) after reaction continues for 4 to 6 hours, the liquid molten at the upper layer is sucked out to obtain low-temperature aluminum electrolyte, and the product at the lower layer is subjected to acid dipping or distillation to remove surface residue to obtain metal zirconium.

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Guangdong, China

Weiping Wu