JPS6350408B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method of statically separating 〓 and carp based on the difference in their specific gravity in a separation furnace, and then statically separating 〓
The present invention relates to a method for separating and taking out the above-mentioned separation furnace by taking it out from the take-out port in the side wall of the separation furnace.

[Conventional technology]

Generally, continuous smelting of copper is carried out through the following steps: preliminary treatment of copper ore, separation of copper and copper, and production of blister copper.The process in question here is the separation of copper and copper. This is a separation process. This separation step is performed, for example, in a separation furnace 1 as shown in FIG. This separation furnace 1 flows into the
The molten metal consisting of 2 and 3 is statically separated into 2 and 3 while being electrically heated by electrodes 4, 4.
An outlet 5 is formed to allow the flow to flow out to the outside.
A cloth removal port 6 is formed at the lower end of the side wall 1b facing the side wall 1a. Note that the reference numeral 7 in the figure is a molten metal inlet for flowing molten metal into the separation furnace 1.

In the separation furnace 1 having the above-described configuration, the 2 and the sludge 3 are statically separated due to the difference in their specific gravity, and the 2 flows out from the outlet 5 and is taken out. It is taken out from the take-out port 6.

[Problem that the invention seeks to solve]

By the way, a large number of floating substances formed by undissolved solvent and the like are floating on the upper surface of the layer. Although these floating substances contain a large amount of grains, they are discharged from the separation furnace along with the slag, resulting in a problem of poor yield. In addition, there is an activated part in the 〓 layer that consists of laminar flow and a completely mixed flow, and because the completely mixed flow stirs up the grains, the 〓 grains do not settle sufficiently in the 〓 layer and are discarded together with the 〓. Therefore, there was a problem that the yield was even worse.

In addition, as a method to solve the above problems, the temperature of the molten metal in the separation furnace is raised to lower the viscosity of the molten metal, thereby quickly evaporating the suspended matter and the grains contained in the molten metal. A possible method is to reduce the amount of grains that are discharged from the separation furnace together with the grains by settling them into a layer.

However, with this method, power consumption increases, which increases the energy consumption rate, and the cost of consumable parts and repair costs increase due to electrode wear and furnace wall melting due to heat dissipated from the molten metal. There is a problem with doing so.

This invention allows the above-mentioned floating matter and the grains contained in the grain to quickly settle into the grain layer, resulting in a high yield and low power consumption. The present invention provides a method for separating and extracting 〓 in a continuous smelting process that causes less erosion loss of 〓.

[Means to solve the problem]

In this invention, when separating 〓 and carp while standing in a separation furnace, the temperature inside the separation furnace is lowered,
Thereby, the above problem is solved by forming a solidified or semi-molten surface layer on the upper surface.

[Effect]

The suspended solids remain in the separation furnace together with the surface layer for a long time, during which time the grains contained in the suspended solids settle into the carbon layer, and the surface layer creates a laminar flow in the activated part of the layer. As a result, the grains in the grains quickly settle into the grain layer without being thrown up.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
This will be explained with reference to the figures.

FIG. 1 shows a separation furnace in which grains and ash are separated statically, and its components are the same as those of the conventional separation furnace described above.

In this embodiment, a molten metal of 25 TON/Hr and 17 TON/Hr of copper ore generated in the copper ore pre-treatment step is continuously flowed into the separation furnace 1 from the molten metal inlet 7 and transferred to the electrodes 4, 4. Then, it was heated with electricity. The electrode voltage at this time was set to 110V, 10V lower than before. In addition, the electrode current is
It was set to 7.5KA with the same settings as before. By this,
The temperature inside the separation furnace 1 is lower than that in the past, and the upper surface of the Kawa 2 layer is cooled, and the solidified surface layer 9
It became.

In addition, 〓2 from which the grains were removed is the surface layer 9.
The cloth 3 flows under the cloth, flows out from the take-out port 5 and is taken out, and the cloth 3 is taken out from the cloth take-out port 6.

In the above embodiment, the floating substances 8, 8, . Furthermore, as shown in Figure 2, due to the surface layer 9, the ratio of laminar flow in the activated part of the second layer is 22%, and the copper grade in the waste discharge is 22%.
It was 0.56%. In addition, in the conventional continuous smelting process, the ratio of laminar flow in the activated part of the layer is less than 13%, and the copper grade in the waste is shown by hatching in the figure. It was 0.6% to 0.7%.

In addition, the surface layer 9 plays a role as a heat insulating material, and the temperature of the grains 2 and 3 is maintained at about 125°C, so that the viscosity of the grains 2 does not increase and the sedimentation of the grains is not hindered. Ta.

Furthermore, by setting the voltage between the electrodes 4 to 110V, the power consumption could be reduced by about 200 KWH, and the consumption of the electrodes could also be reduced to about half of the conventional one.

〔Effect of the invention〕

In the method for separating and extracting 〓 in the continuous smelting process according to the present invention, when 〓 and millet are left to separate in the separation furnace, the temperature inside the separation furnace is lowered, thereby causing the upper surface of 〓 By forming a solidified or semi-molten surface layer, suspended matter and grains contained in the slag can be quickly settled into the sludge layer, resulting in a high yield and low power consumption. Moreover, it is possible to obtain the effect of reducing the wear of the electrodes and the melting damage of the furnace wall.

[Brief explanation of the drawing]

1 and 2 are diagrams showing one embodiment of the present invention, and FIG. 1 is a diagram showing a state in which a solidified surface layer portion is formed on the upper surface portion of the grain in a separation furnace, and FIG. Figure 2 is a diagram showing the relationship between the ratio of laminar flow in the activated part of the layer in the separation furnace and the copper grade of the copper discharged from the separation furnace. In the separation and extraction method of 〓 in the process,
FIG. 2 is a diagram showing a state in which 〓 and gloss are separated while standing in a separation furnace. 1...Separation furnace, 1a...Side wall, 2...〓, 3...
...Rubber, 5... Outlet, 9... Surface layer.

Claims (1)

[Claims] 1. A continuous smelting process in which the 〓 and the steel are separated by standing in a separation furnace based on the difference in their specific gravity, and then the 〓 is poured out and taken out from the 〓 outlet formed on the side wall of the separation furnace. In the continuous smelting process, which is characterized in that a solidified or semi-molten surface layer is formed on the upper surface of the 〓 by lowering the temperature in the separation furnace in the separation and extraction method of 〓. How to separate and take out 〓.