JPS5825440A - Method for separating metal from ore in low pressure - Google Patents

Abstract

PURPOSE:To economically obtain a metal whose purity is high, by heating an ore at low pressure, boiling and evaporating it, and separating each component metal by utilizing a difference of a condensation temperature from this gaseous mixture. CONSTITUTION:When separating a metal from a chrome ore, etc., at first, oxygen is separated from a metallic oxide in an ore. This ore A is put into a furnace 1, and the ore A is melted, boiled and evaporated by setting the inside of the furnace 1 to a low pressure state, and irradiating a laser 3, etc. The evaporated gaseous mixture is made to pass through plural traps 5-11 in order being in a low pressure state. A temperature of these traps 5-11 is set at a temperature which is a little lower than a condensation temperature of each metal to be separated. At first, a metal oxide such as Al2O3, SiO2, etc., is condensed and liquefied by the trap 5, and is taken out to a vessel 20. Gaseous mixture of the residual metal which is not condensed by this temperature is condensed and liquefied at a successively lowered temperature by the traps 6-11, and by the same operation, Fe, Si, Cr, Mn and Al, Ca, Mg, etc. are taken out to vessels 21-26 successively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for separating metals from ores at low pressure.

In the conventional smelting method using a reducing agent, pure metal is not particularly produced, and in addition, a large amount of residue is generated, which causes problems in its disposal, and also causes a loss of resources.

In view of this, the present invention focuses on the fact that each metal element has its own condensation humidity, and provides a method for heating ore under low pressure to boil and evaporate it, and separating it into component metals based on the difference in condensation temperature. This is what I am trying to do.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the present invention will be described based on the drawings, taking cremite as an example.

The figure shows a schematic configuration of the apparatus used to carry out the present invention, in which (1) is a furnace, (2) is a cooling device that prevents the furnace (1) from heating more than necessary, and (8) is a furnace (1). ) is a laser for heating, melting, boiling, and vaporizing the ore (4), for example, a glass laser with an output of about 1/Q KW is used for this purpose. Note that the heating means is, of course, not limited to laser. (4) is a guide pipe connected to the furnace (1). This guide tube (4) has a number of traps (5) (6) depending on the type of metal to be separated, in this example, seven traps (5) (6).
(7 bar 8) (9) is provided with (b), and its terminal end is connected to the vacuum pump (2) via the water cooling device (b). Q in the diagram: 104 (1111(1・α?5Q11
(I is a cooling cap for cooling the above-mentioned trough 2-(5)-(lυ, and cooling is performed by air.・(This is a container to receive the metal flowing out from IIJ.

Figure 2 is a detailed view of the trap (5) - Qη section, where (to) is a forked introduction tube connected to the guide tube (4), and both ends are lattice tubes (to). - Connected to both ends. Also, in the figure (to) is a bifurcated extraction pipe connected to both other 11il ends of the lattice pipe (to), and (to) is an outflow pipe that is similarly connected to the lattice pipe. is the container ψ
) is connected to n. The grid W■ is the cooling part (2)...
It is installed near the center of the lattice pipe, and is tilted from the horizontal to either side of the mounting part of the drawer pipe (to) so that the metal condensed in the lattice pipe can easily flow out. On the side of this grid pipe (to) there is a temperature N #F 61 for measuring the temperature near the grid pipe.
Al is arranged so that the temperature of the grid tube can be indirectly detected. Also, the intake port (b) of the cooling part Q3-on
Four thermometers are also provided at the and exhaust ports to measure the intake and exhaust temperatures.

Next, a method for separating metals from chromite using the above-mentioned apparatus will be explained.

Generally, chromite is Orc4, 'I@OB,
MgO,5iO1.

Since it is made of metal oxides such as MgO, oxygen is first removed from these metal oxides. Next, the ore (A) is put into the furnace (1), the furnace (1) is sealed, and the vacuum pump is turned on to bring the entire apparatus into a low pressure state of about 10 kg. Of course, the pressure is not limited to this. Next, ray f-(8)
M, mya.

Evaporate. The metal, which has evaporated into a mixed gas at a temperature of over 2,000 degrees Celsius, enters the induction pipe (4) from inside the furnace (1) and sequentially passes through each cylinder (5). Separation of metals is carried out at this stage. First, in the trap (5), the grid tube (to) is kept at 2050°C, and the condensation temperature at pressure 1 is 206°C or higher.
The remaining metal oxides, such as B 1oJe, are condensed and liquefied in the grid tube and taken out into the container (e) through the outflow tube (e).

This warm, non-condensing remaining metal mixture passes from the end of the lattice tube through the extraction pipe (to), passes through the conduit (4), and goes to the next trap (6).At the zero return lap (6), it passes through the lattice tube (to). of/
The condensation temperature is 9.5θ°C and 20j? ”O(/)l・
It is condensed and liquefied and taken out into a container (b). Similarly, in the trap (7), the condensation temperature is /♂60″C /♂♂r℃
81, Trap (8) has a condensation temperature of 7750°C, and Or1 Trap (9) has a condensation temperature of /1y6″C, /g, fO°C.
and condensation temperature/, 50. :5'O Mn and 1412
At 7°C, the temperature is 250°C and the condensation temperature is 03°C.

In the trap 0υ, the temperature is reduced to 130°C.
Take out 1 volume of Mg at 13°C (7).

The above explanation is based on the example of aluminum ore, but even for other ores, it is necessary to prepare traps according to the component metals and adjust the temperature to suit the humidity temperature of each metal. lj
Just set it to A degree.

The present invention as described above is economical because it does not use any reducing agent, and it is also possible to obtain highly pure metals because the separation takes advantage of the 1-11 degree difference between each metal element. Has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration (9) of the apparatus used in the uninvented method, and FIG. 2 (2) is a detailed view of the trap portion. (1)・−furnace (8)−・・shi −the −(
A)・-ore

Claims (1)

[Claims] 1)! The inside of the furnace containing the magnet from which the element has been removed is brought to a low pressure state, and then the rolling stones are heated to melt, boil, and evaporate to form a mixed gas of metal.The rear mixed gas is discharged to the outside of the furnace at the same pressure as inside the furnace. A method for separating metals from ores under low pressure, in which the metals are separated by condensation and liquefaction by sequentially cooling the metals to a temperature slightly lower than the condensation temperature of each metal at the pressure.