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

Abstract

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.AlF.sub.3 and NaF.AlF.sub.3) in the aluminum electrolysis industry can achieve a proper electrical conductivity.

Claims

1. A method for preparing an aluminum-zirconium-boron alloy and synchronously preparing a cryolite, comprising: the following steps: Step A: placing aluminum in a reactor, heating the reactor to 700-850 degrees centigrade, and adding a mixture consisting of sodium fluorozirconate and sodium 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 sodium cryolite, wherein the lower substance is an aluminum-zirconium-boron alloy, wherein aluminum is added in an excessive amount.

2. The method according to claim 1 wherein in the aluminum-zirconium-boron alloy, zirconium accounts for 1-10% by weight of the aluminum-zirconium-boron alloy, boron accounts for 0.1-3% by weight of the aluminum-zirconium-boron alloy, and the rest is aluminum.

3. The method according to claim 2, wherein the ratio of x to y is 1:2.

4. The method according to claim 2, wherein the ratio of x to y is 1:1.

5. The method according to claim 1, wherein the cryolite obtained in Step B has the molecular formula of $\frac{3y+6x}{3y+4x}\mathrm{NaF}.Math.{\mathrm{AlF}}_3.$

6. The method according to claim 5, wherein the ratio of x to y is 1:2.

7. The method according to claim 5, wherein the ratio of x to y is 1:1.

8. The method according to claim 1, wherein the ratio of x to y is 1:2.

9. The method according to claim 1, wherein the ratio of x to y is 1:1.

Description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(1) The disclosure is described below in detail with reference to specific embodiments.

(2) Embodiment 1

(3) 100 kg aluminum is weighed and placed in a reactor, the reactor is heated to 750 degrees centigrade, a mixture consisting of 141.5 kg potassium fluozirconate and 62.5kg potassium fluoborate is added into the reactor, the reactants are stirred for 4 hours, then the upper molten liquid, that is, 171 kg potassium cryolite 9/7 KF.AlF.sub.3, is pumped out using a siphon pump, and the lower substance is 133 kg aluminum-zirconium-boron alloy.

(4) Embodiment 2

(5) 100 kg aluminum is weighed and placed in a reactor, the reactor is heated to 700 degrees centigrade, a mixture consisting of 125.5 kg sodium fluozirconate and 54.5 kg sodium fluoborate is added into the reactor, the reactants are stirred for 6 hours, then the upper molten liquid, that is, 151.5 kg sodium cryolite (9/7 NaF.AlF.sub.3), is pumped out, and the lower substance is 128.5 kg aluminum-zirconium-boron alloy.

(6) Embodiment 3

(7) 200kg aluminum is weighed and placed in a reactor, the reactor is heated to 800 degrees centigrade, a mixture consisting of 141.5 kg potassium fluozirconate and 62.5 kg potassium fluoborate is added into the reactor, the reactants are stirred for 6 hours, then the upper molten liquid, that is, a potassium cryolite (6/5 KF.AlF.sub.3), is pumpedout, and the lower substance is 312kg aluminum-zirconium-boron alloy.

(8) Embodiment 4

(9) 200 kg aluminum is weighed and placed in a reactor, the reactor is heated to 850 degrees centigrade, a mixture consisting of 125.5 kg sodium fluozirconate and 109 kg sodium fluoborate is added into the reactor, the reactants are stirred for 5 hours, then the upper molten liquid, that is, a sodium cryolite (6/5 NaF.AlF.sub.3), is pumped out, and the lower substance is 300.1 kg aluminum-zirconium-boron alloy.

(10) The above is detailed description of the disclosure with reference to specific preferred embodiments which is not to be construed as limiting the disclosure. The various simple deductions or replacements that can be devised by those of ordinary skill in the art without departing from the concept of the disclosure all fall within the protection scope of the disclosure.