阅读说明：本技术 连续炼铜设备及炼铜方法 (Continuous copper smelting equipment and copper smelting method ) 是由 不公告发明人 于 2019-08-16 设计创作，主要内容包括：一种连续炼铜设备及炼铜方法,该连续炼铜设备包括熔炼炉和吹炼炉,熔炼炉和所述吹炼炉通过连接溜槽连接,熔炼炉包括熔炼炉本体和设置在熔炼炉本体一侧的排渣室,根据熔炼反应生成物的形成位置,熔炼炉本体内部划分为从下至上设置的冰铜层区和熔渣层区,排渣室的熔渣排放口设置在高出冰铜层区800-1200mm的高度,熔炼炉本体内设置有一次鼓风口和二次鼓风口,一次鼓风口设置在熔渣层区,且距离熔渣层区顶部300-600mm的高度上,第二鼓风口设置在所述熔渣层区上方。本发明实施例可消除熔炼炉内产生的“横膈膜”,熔炼炉可产出高品位的冰铜。(A continuous copper smelting device comprises a smelting furnace and a converting furnace, wherein the smelting furnace is connected with the converting furnace through a connecting chute, the smelting furnace comprises a smelting furnace body and a slag discharging chamber arranged on one side of the smelting furnace body, the interior of the smelting furnace body is divided into an matte layer area and a slag layer area which are arranged from bottom to top according to the forming position of a smelting reaction product, a slag discharging port of the slag discharging chamber is arranged at the height of 800-1200mm higher than the matte layer area, a primary blast port and a secondary blast port are arranged in the smelting furnace body, the primary blast port is arranged on the slag layer area and is at the height of 600mm away from the top of the slag layer area, and the second blast port is arranged above the slag layer area. The embodiment of the invention can eliminate the diaphragm membrane generated in the smelting furnace, and the smelting furnace can produce high-grade matte.)

1. A continuous copper smelting device comprises a smelting furnace and a converting furnace, wherein the smelting furnace and the converting furnace are connected through a connecting chute, the smelting furnace comprises a smelting furnace body and a slag discharging chamber arranged on one side of the smelting furnace body, and the interior of the smelting furnace body is divided into an matte layer area and a slag layer area which are arranged from bottom to top according to the forming position of a smelting reaction product.

2. The continuous copper smelting plant according to claim 1, characterized in that the primary tuyeres and secondary tuyeres are arranged horizontally on the side walls of the furnace body.

3. The continuous copper smelting plant of claim 1, wherein the converting furnace includes a converting furnace body and a plurality of converting oxygen enriched air lances disposed at a top of the converting furnace body.

4. A continuous copper smelting plant as claimed in claim 3 wherein the converting oxygen enriched air lance is a laval lance.

5. The continuous copper smelting equipment according to claim 4, wherein the converting oxygen-enriched air nozzle extends to a distance of 2-3 m from the melt liquid level inside the converting furnace body.

6. The continuous copper smelting apparatus according to claim 1, wherein the slagging chamber is separated from the smelting furnace body by a water-cooled partition wall which is spaced from the bottom of the smelting furnace body to communicate the slagging chamber with the bottom of the smelting furnace body.

7. The continuous copper smelting apparatus according to claim 1, characterized in that a plurality of rows of primary tuyeres are provided on the furnace body at different heights on the furnace body, each primary tuyeres being provided with a detachable water jacket.

8. The continuous copper smelting plant according to claim 1, wherein the slag discharge chamber is provided with a plurality of slag discharge ports from bottom to top, and each slag discharge port is provided with a detachable water jacket.

9. A continuous copper smelting method applied to the continuous copper smelting equipment according to any one of claims 1 to 8, characterized by comprising the following steps:

mixing raw materials containing copper concentrate, quartz flux and lump coal, and adding the mixture into a smelting furnace body from a charging hole of the smelting furnace;

calculating the thickness required by the matte layer according to the productivity, and determining the position of the matte layer area;

arranging a slag discharge port at a height of 800-1200mm higher than the matte layer region, and arranging a primary blast port at a height of 300-600mm away from the top of the slag layer region;

oxygen-enriched air containing 70-85% of oxygen is blown in through a primary blast port, the raw materials and the oxygen react rapidly to generate copper matte and are deposited on the lower part of the smelting furnace body, and the copper matte on the lower part of the smelting furnace body is discharged into a converting furnace through a connecting chute in a siphoning mode;

continuously adding lime flux from a flux adding port at the top of the converting furnace, simultaneously spraying oxygen-enriched air containing 21-30% of oxygen through a Laval nozzle arranged at the top of the converting furnace, and carrying out continuous converting reaction on furnace burden in the converting furnace and oxygen to generate blister copper and converting slag;

discharging the crude copper at the bottom of the converting furnace in a siphoning mode;

and opening a converting slag discharge port of the converting furnace, discharging the converting slag in an overflow mode, and returning the converting slag to the smelting furnace for secondary smelting after air quenching and cooling.

10. The continuous copper smelting process according to claim 9, wherein the lime flux has a calcium oxide content of 40 to 90%.

11. The continuous copper smelting process according to claim 9, wherein the blast rate of the primary tuyere is 250 to 300 m/s.

12. The continuous copper smelting process according to claim 9, wherein the blowing rate of the secondary tuyere is 20 to 30 m/s.

13. The continuous copper smelting process according to claim 9, wherein the quartz flux is used in an amount of 2: 1 control addition.

14. The continuous copper smelting method according to claim 9, wherein the copper matte contains 70-75% of copper.

Technical Field

The invention relates to the technical field of metal smelting, in particular to continuous copper smelting equipment and a copper smelting method.

Background

At present, the world copper smelting technology is developing towards short flow and continuous, and continuous blowing requires that the grade of matte needs to be improved to 70-75%, namely the copper content reaches 70-75%, otherwise, the slag content in blowing is too large, so that the direct yield of blown products is influenced, and further the factory benefit is influenced.

Disclosure of Invention

In view of the above, it is necessary to provide a continuous copper smelting facility and a copper smelting method, aiming at the problem that a tri-iron tetroxide layer is easy to precipitate when the grade of matte is improved and the separation of copper slag is influenced in the prior art.

A continuous copper smelting device comprises a smelting furnace and a converting furnace, wherein the smelting furnace and the converting furnace are connected through a connecting chute, the smelting furnace comprises a smelting furnace body and a slag discharging chamber arranged on one side of the smelting furnace body, the interior of the smelting furnace body is divided into an matte layer area and a slag layer area which are arranged from bottom to top according to the forming position of a smelting reaction product, a slag discharging port of the slag discharging chamber is arranged at the height which is 800-1200mm higher than the matte layer area, a primary blast port and a secondary blast port are arranged in the smelting furnace body, the primary blast port is arranged on the slag layer area and is at the height which is 600mm away from the top of the slag layer area, and the second blast port is arranged above the slag layer area.

Further, the above continuous copper smelting apparatus, wherein the primary tuyere and the secondary tuyere are horizontally arranged on a side wall of the furnace body.

Further, the continuous copper smelting equipment comprises a converting furnace body and a plurality of converting oxygen-enriched air spray pipes arranged at the top of the converting furnace body.

Further, in the continuous copper smelting equipment, the converting oxygen-enriched air spray pipe is a Laval spray pipe.

Further, according to the continuous copper smelting equipment, the converting oxygen-enriched air spray pipe extends to a position 2-3 m away from the liquid level of the melt in the converting furnace body.

Further, the continuous copper smelting equipment is characterized in that the deslagging chamber is separated from the smelting furnace body through a water-cooling partition wall, and the water-cooling partition wall is spaced from the bottom of the smelting furnace body so that the deslagging chamber is communicated with the bottom of the smelting furnace body.

Further, the continuous copper smelting equipment is characterized in that a plurality of rows of primary tuyeres are arranged on the smelting furnace body and are positioned at different heights on the smelting furnace body, and each primary tuyere is provided with a detachable water jacket.

Further, in the continuous copper smelting equipment, a plurality of slag discharge ports are arranged on the slag discharge chamber from bottom to top, and each slag discharge port is provided with a detachable water jacket

The embodiment of the invention also provides a continuous copper smelting method, which is applied to the continuous copper smelting equipment and comprises the following steps:

mixing raw materials containing copper concentrate, quartz flux and lump coal, and adding the mixture into a smelting furnace body from a charging hole of the smelting furnace;

calculating the thickness required by the matte layer according to the productivity, and determining the position of the matte layer area;

arranging a slag discharge port at a height of 800-1200mm higher than the matte layer region, and arranging a primary blast port at a height of 300-600mm away from the top of the slag layer region;

oxygen-enriched air containing 70-85% of oxygen is blown in through a primary blast port, the raw materials and the oxygen react rapidly to generate copper matte and are deposited on the lower part of the smelting furnace body, and the copper matte on the lower part of the smelting furnace body is discharged into a converting furnace through a connecting chute in a siphoning mode;

continuously adding lime flux from a flux adding port at the top of the converting furnace, simultaneously spraying oxygen-enriched air containing 21-30% of oxygen through a Laval nozzle arranged at the top of the converting furnace, and carrying out continuous converting reaction on furnace burden in the converting furnace and oxygen to generate blister copper and converting slag;

discharging the crude copper at the bottom of the converting furnace in a siphoning mode;

and opening a converting slag discharge port of the converting furnace, discharging the converting slag in an overflow mode, and returning the converting slag to the smelting furnace for secondary smelting after air quenching and cooling.

Further, in the continuous copper smelting method, the content of calcium oxide in the lime flux is 40-90%.

Further, in the continuous copper smelting method, the blowing rate of the primary tuyere is 250m/s to 300 m/s.

Further, in the continuous copper smelting method, the blowing rate of the secondary blowing port is 20-30 m/s.

Further, in the continuous copper smelting method, the quartz flux is used in an amount of 2: 1 control addition.

Further, in the continuous copper smelting method, the copper content of the matte is 70-75%.

In the embodiment of the invention, the thickness of the slag layer can be controlled properly by arranging the slag discharge port at a height of 800-1200mm higher than the ice copper layer. In addition, the height of the primary tuyere is arranged at a distance of 300-600mm away from the top of the slag layer, so that oxygen-enriched air blown in by the primary tuyere can fully react with mixed copper concentrate to generate copper matte and slag, and simultaneously, the mechanical stirring of the melt by the airflow of the primary tuyere is utilized to eliminate Fe₃O₄The diaphragm is used for smoothly separating copper slag, the smelting process is smoothly carried out, and high-grade matte containing 70-75% of copper is produced.

Drawings

FIG. 1 is a schematic structural view of a continuous copper metallurgy apparatus according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a converting furnace according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a melting furnace in a second embodiment of the present invention.

Description of the main elements

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, this embodiment is provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.