WO2020057266A1

WO2020057266A1 - Copper smelting device

Info

Publication number: WO2020057266A1
Application number: PCT/CN2019/098643
Authority: WO
Inventors: 李锋; 尉克俭; 黎敏; 陆金忠; 李建辉; 曹珂菲; 郝小红
Original assignee: 中国恩菲工程技术有限公司
Priority date: 2018-09-21
Filing date: 2019-07-31
Publication date: 2020-03-26
Also published as: EA202090703A1; CN108913914A; CN108913914B; CL2021000633A1

Abstract

A copper smelting device, comprising a furnace body (100), a feeding port (101), a smoke outlet (106), a slag outlet (102), a copper matte port (103), and a primary air vent (104). A copper matte layer (112), a slag layer (113), and a gas layer (114) are sequentially arranged in the furnace body (100) from bottom to top. The feeding port (101) is arranged on a top wall of the furnace body (100). The smoke outlet (106) is arranged on the top wall of the furnace body (100). The slag outlet (102) is arranged at one end of the furnace body (100). The copper matte port (103) is arranged at an end of the furnace body (100) opposite to the slag outlet (102), and the copper matte port (103) is located at the bottom of the copper matte layer (112). The primary air vent (104) is located on a side wall of the furnace body corresponding to the slag layer (113), and is used to blow oxygen-enriched air into the slag layer (113). The dimensions in the width-wise direction of the inner wall corresponding to the slag layer (113) are greater than 2.5 m and less than or equal to 4.5 m so as to expand the scale of single furnace processing of concentrates, thereby improving labor efficiency and reducing operating costs.

Description

Copper melting plant

cross reference

This disclosure claims priority from a Chinese patent application filed on September 21, 2018 with an application number of 201811109807.3, entitled "Copper Smelting Device", the entire contents of which are incorporated herein by reference.

Technical field

The present disclosure relates to the field of non-ferrous metallurgy, and in particular, to a copper smelting device.

Background technique

At present, the fixed side-blown melting furnace that has been put into operation is only 100,000 t / a copper, and the largest side-blown furnace currently designed is only 200,000 t / a copper, which has not yet been put into operation. If the annual output is 300,000 to 500,000 The t / a copper scale, that is, the annual processing of copper concentrates of 1.5 to 2 million t / a, usually requires at least two side-blown copper production lines, covering a large area, large equipment, large investment, large number of operators, and high operating costs. Due to the small specifications of the fixed side-blown furnaces that have been put into operation at present and the small concentrate processing capacity, they cannot meet the needs of a single side-blown furnace, that is, a single series of large-scale concentrate processing capacity, which has limited the side-blown copper technology to a certain extent. Development and promotion.

The above information disclosed in the background section is only used to enhance the understanding of the background of the present disclosure, so it may include information that does not constitute related technology known to those of ordinary skill in the art.

Public content

One of the main objectives of the present disclosure is to overcome at least one of the drawbacks of the related art and provide a copper smelting device to meet the needs of large-scale processing of concentrates.

In order to achieve the above disclosure purpose, the present disclosure adopts the following technical solutions:

According to an aspect of the present disclosure, a copper smelting device is provided, which includes a furnace body, a charging port, a smoke outlet, a slag outlet, a copper grate, and a primary air vent. A copper grate layer and slag are sequentially arranged from bottom to top in the furnace. Layer and gas layer; a feeding port is provided on the top wall of the furnace body; a smoke outlet is provided on the top wall of the furnace body; a slag outlet is provided on one end of the furnace body; The end of the furnace body opposite to the slag outlet, the copper grate opening is located at the bottom of the copper grate layer; the primary air outlet is located on the corresponding side wall of the slag layer of the furnace body, and is used for The slag layer is blown with oxygen-enriched air, and the widthwise dimension of the inner side wall corresponding to the slag layer is greater than 2.5m and less than or equal to 4.5m.

According to a specific embodiment of the present disclosure, the dimension in the height direction of the inner cavity of the furnace body is 6m to 8m.

According to a specific embodiment of the present disclosure, a widthwise dimension of the gas layer is 4.1m-7m.

According to a specific embodiment of the present disclosure, a blowing pressure of the primary tuyere is 0.12 MPa to 0.3 MPa.

According to a specific embodiment of the present disclosure, the copper smelting device further includes a secondary air outlet disposed on a side wall corresponding to the gas layer.

According to a specific embodiment of the present disclosure, the number of the primary air vents is plural, and the distance between adjacent primary air vents is 500-600 mm.

According to a specific embodiment of the present disclosure, a partition wall is provided in an inner cavity of the copper smelting device along a width direction, and the partition wall divides the inner cavity into a melting zone and a settlement zone, and the partition wall and the There is a space between the top walls of the furnace body.

According to a specific embodiment of the present disclosure, the length of the melting zone is 12m-20m.

According to a specific embodiment of the present disclosure, the settling area is provided with a heating electrode and / or a burner for holding or heating the settling area.

It can be known from the above technical solution that the advantages and positive effects of the copper smelting device of the present disclosure are that the width dimension of the inner side wall corresponding to the slag layer of the copper smelting device is greater than 2.5 m and less than or equal to 4.5 m, which can expand single furnace processing Concentrate scale, which improves labor efficiency and reduces operating costs.

The above and other objects, features, and advantages of the present disclosure will be more apparent through the following description of the preferred embodiments with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Various objectives, features, and advantages of the present disclosure will become more apparent by considering the following detailed description of the preferred embodiments of the present disclosure in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the disclosure, and are not necessarily drawn to scale. In the drawings, the same reference numerals always refer to the same or similar parts. among them:

Fig. 1 is a plan view of a copper smelting device according to an exemplary embodiment.

Fig. 2 is a cross-sectional view taken along the line A-A of the copper smelting apparatus in Fig. 1.

Fig. 3 is a B-B sectional view of the copper smelting apparatus in Fig. 1.

Among them, the reference signs are described as follows:

100. Furnace body 101. Feeding port;

102. Slag outlet; 103. Copper outlet;

104. Primary air outlet 105; Secondary air outlet;

106. Smoke outlet; 107. Partition wall;

108. Graphite electrode 109: Burner port;

110. Smelting area 111. Settlement area

112. Copper slag layer; 113 slag layer;

114. Gas layer; 115. Copper water jacket;

L, length direction W, width direction;

H. Height direction.

detailed description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments To those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

1 to 3, according to an aspect of the present disclosure, a copper smelting device is provided, which includes a furnace body 100, a charging port 101, a smoke outlet 106, a slag outlet 102, a copper grate 103, and a primary air outlet 104. In the furnace body 100, a copper rhenium layer 112, a slag layer 113, and a gas layer 114 are sequentially arranged from bottom to top. The copper rhenium layer 112 is located at the bottom of the inner cavity of the furnace body 100, and on the corresponding side wall of the copper rhenium layer 112. A copper gate 103 may be provided, and the copper gate 103 may be located at the bottom of the copper gate layer 112. According to a specific embodiment of the present disclosure, the copper gate 103 may be disposed at an end of one end of the furnace body 100. According to a specific embodiment of the present disclosure, the feeding port 101 may be disposed on the top wall of the furnace body 100, and there may be multiple feeding ports 101 distributed on the top wall. For example, but not limited to, the feeding port 101 may be 3-6.

With continued reference to FIGS. 1 to 3, according to a specific embodiment of the present disclosure, the slag outlet 102 may be disposed at an end of the furnace body 100 opposite to the copper grate 103. According to a specific embodiment of the present disclosure, the primary air outlet 104 is located on a side wall corresponding to the slag layer 113 of the furnace body 100, and can be used to blow oxygen-rich air into the slag layer 113. The width of the inner side wall corresponding to the slag layer 113 The dimension of the direction W is greater than 2.5 m and less than or equal to 4.5 m. According to a specific embodiment of the present disclosure, the concentration of the oxygen-enriched air is 70% to 95%, but is not limited thereto, and may be selected according to actual needs. According to a specific embodiment of the present disclosure, the blowing pressure of the primary tuyere 104 is 0.12 MPa to 0.3 MPa, and the pressure can increase the stirring intensity of the middle melt of the furnace body 100 in the width direction W and increase the blast of oxygen-enriched air. Pressure can overcome the resistance of the melt and increase the penetration depth of the blast. According to a specific embodiment of the present disclosure, there may be multiple primary air outlets 104, and the interval between adjacent primary air outlets 104 may be 500mm-600mm, such as but not limited to 550mm or 600mm. According to a specific embodiment of the present disclosure, a diameter of the air outlet of the primary air outlet 104 may be 38 mm-54 mm, such as but not limited to 45 mm or 50 mm, or 52 mm. According to a specific embodiment of the present disclosure, the number of the primary air outlets 104 may be 48-80, such as but not limited to 50, 55, 60, 65, 70, 75, and may be based on actual conditions. Need to choose. The copper smelting device provided by the present disclosure can be a side-blown furnace, capable of processing 1 to 2 million t / a of concentrate in a single furnace body, and a copper production scale of 200,000 to 500,000 t / a.

Unless otherwise stated, the length direction L is the direction defined by the double arrow in FIG. 1, the height direction H is the direction of the double arrow in FIG. 2, and the width direction W defined in the present disclosure is the direction of the double arrow in FIG. 3. Direction. It can be understood that when the picture in the illustration is rotated, the defined width direction W and height direction H are also rotated by corresponding angles.

With continued reference to FIGS. 1 to 3, the projection of the furnace body 100 in the width direction W may be that the upper gas layer structure width is greater than the lower slag layer structure width. According to a specific embodiment of the present disclosure, the dimension of the width direction W of the gas layer 114 may be 4.1m-7m. The outer shell of the furnace body 100 may be a steel structure, and the inner lining may be formed of a refractory material. The top of the furnace body 100 may be provided with a feeding opening 101 and a smoke outlet 106. The feeding opening 101 can be set on the center line of the furnace body 100, but is not limited thereto, and can also be arranged near the two side walls according to actual needs. According to a specific embodiment of the present disclosure, a primary air outlet 104 and a secondary air outlet 105 may be provided on a side wall of the furnace body 100, wherein the primary air outlet 104 is on both sides of the furnace body 100, and the primary air outlet 104 may be provided on a slag layer 113. The secondary air outlet 105 may be disposed on the top wall and the side wall of the furnace body 100, and the secondary air outlet 105 may correspond to the gas layer 114.

According to a specific embodiment of the present disclosure, a cooling element may be provided on the side wall of the furnace body 100, the partition wall 107, and the end wall of the settlement area 111. For example, but not limited to, a copper water jacket 115 may be provided on the side wall. The copper water jacket 115 may be provided with a cooling medium therein, such as but not limited to, the cooling medium may be water. A copper nozzle 103 may be provided at one end of the furnace body 100, and a slag outlet 102 and a burner port 109 may be provided at the other end of the furnace body 100. The burner port 109 may be disposed above the slag outlet 102.

According to a specific embodiment of the present disclosure, the dimension H of the inner cavity height of the furnace body 100 may be 6 m to 8 m. According to a specific embodiment of the present disclosure, the length of the melting zone may be 12m-20m. According to a specific embodiment of the present disclosure, the copper smelting device further includes a secondary air outlet 105 disposed on a side wall corresponding to the gas layer 114. According to a specific embodiment of the present disclosure, the copper smelting device further includes a smoke outlet 106 provided on the top wall of the furnace body 100.

According to a specific embodiment of the present disclosure, the internal cavity of the copper smelting device may be provided with a partition wall 107 along the width direction W. The partition wall 107 divides the internal cavity into a melting area 110 and a settlement area 111, and the partition wall 107 and the furnace body 100. There are spaces between the top walls. The smelting zone 110 and the settling zone 111 are arranged horizontally. With continuous feeding and smelting, the smelting slag generated after smelting can directly flow into the settling zone 111, and the copper slag and slag are separated in the settling zone 111.

According to a specific embodiment of the present disclosure, the sedimentation region 111 is provided with a heating electrode for keeping or heating the sedimentation region 111. According to a specific embodiment of the present disclosure, the heating electrode may be a graphite electrode 108, but not the same. For the limit, you can choose according to your needs. According to a specific embodiment of the present disclosure, the settling area 111 may further be provided with a burner, and the burner may be provided in the burner port 109.

After the copper concentrate is mixed with the flux, coal and other returned materials, it can be conveyed to the furnace top of the furnace body 100 through a belt, added to the furnace body 100 through the charging port 101, and 70% to 95% of the rich air is blown through the primary air port 104. Oxygen air, primary air outlet 104 blowing pressure of 0.12MPa ～ 0.3MPa, the material undergoes chemical reactions such as oxidative desulfurization, melting and slagging in the molten pool. 111 is discharged from the slag outlet 102 after being separated from the copper matte. Air is blown into the secondary tuyere 105 for burning the monomer sulfur and carbon monoxide in the flue gas. The flue gas is discharged from the upper gas outlet 106, enters the ascending flue, and the waste heat boiler is sent to the acid production after cooling and dust removal. The melting temperature in the furnace body 100 can be 1200 ° C to 1300 ° C, the depth of the molten pool can be 2000mm to 2800mm, the grade of copper grate is 55% to 78%, the slag contains Cu 0.6% to 2.5%, and the bed energy rate in the melting zone is concentrate The amount is 60 ～ 90t / m2.d. The oxygen-material ratio is related to the copper 锍 grade, and the slag containing Cu is also related to the copper 锍 grade.

Specifically, according to the concentrate processing capacity of different scales, such as 1 to 2 million t / a concentrate, and a certain smelting zone bed energy rate, generally 60 to 90 t / m2.d of concentrate, the furnace hearth of the smelting zone can be estimated. The area is based on the length of the slag layer 113 in the melting zone of the furnace. Generally, the width of the slag layer 113 in the melting zone is calculated. The width of the slag layer 113 in the melting zone is 2.5m-4.5m. , Determine the slag layer tuyere blower pressure, blower pressure 0.12MPa-0.3MPa, the increase of blower volume can be achieved by increasing the number of tuyeres, increasing the diameter of the tuyere and increasing the pressure of oxygen-enriched air.

Specific Embodiment One:

When processing 1 million tons (10,000 tons) of copper concentrate annually, the melting strength is 80t / m ² .d. The furnace area of the slag layer 113 in the melting zone is 38m ² . The size is 15m, the width of the furnace body of the slag layer 113 is 2.5m, the primary air outlet 104 pressure is 0.12MPa-0.15MPa, the primary air outlet 104 spacing is 600mm, the primary air outlet 104 number is 48, the primary air outlet 104 diameter is 40mm, and the feeding opening The number of 101 is 3, the blast oxygen concentration is 85%, the melt temperature is 1220 ℃ ～ 1280 ℃, the depth of the molten pool is 2500mm, the height of the furnace bottom to the furnace top is 7000mm, and the gas layer structure in the furnace body 100 is along the width direction The size of W is 4100mm.

Specific implementation mode two:

When processing 1.2 million tons (10,000 tons) of copper concentrate annually, the smelting strength is 75t / m ² .d, the furnace area of the slag layer 113 in the melting zone is 48m ² , and the size of the slag layer 113 in the melting zone is 16m along the length direction L. The width of the furnace body of the slag layer 113 is 3.0m, the pressure of the primary air outlet 104 is 0.15MPa-0.20MPa, the spacing of the primary air outlet 104 is 600mm, the number of the primary air outlet 104 is 52, the diameter of the primary air outlet 104 is 45mm, and the feeding opening 101 The number is 3, the blast oxygen-rich concentration is 85%, the melt temperature is 1220 ℃ -1280 ℃, the melt pool depth is 2500mm, the furnace height from the furnace bottom to the furnace top is 7200mm, and the gas layer structure in the furnace body 100 is along the width direction W The dimensions are 4800mm.

Specific implementation mode three:

Time for 150 million t copper concentrate smelting strength press 72t / m ² .d, the smelting furnace area of the slag layer 113 is 63m ^2, L dimension along the longitudinal direction of the melting of the slag layer 113 is 18m, the slag layer The furnace body width of 113 is 3.5m, the primary air outlet 104 pressure is 0.15MPa-0.25MPa, the primary air outlet 104 spacing is 600mm, the number of primary air outlets 104 is 60, the primary air outlet 104 diameter is 48mm, and the number of feed openings 101 is 4 The blast air oxygen-rich concentration is 80% -85%, the melt temperature is 1220 ℃ -1280 ℃, the melt pool depth is 2500mm, the furnace height from the furnace bottom to the furnace top is 7500mm, and the gas layer structure in the furnace body 100 is 5600mm in the width direction. .

Specific implementation four:

When processing 1.8 million tons of copper concentrate annually, the melting strength is 72t / m ² .d, the furnace area of the slag layer 113 in the melting zone is 76m ² , and the size of the slag layer 113 in the melting zone along the length direction L is 19m. The slag layer The furnace body width of 113 is 4.0m, the pressure of the primary air outlet 104 is 0.18MPa-0.30MPa, the spacing of the primary air outlet 104 is 600mm, the number of primary air outlets 104 is 62, the diameter of the primary air outlet 104 is 50mm, and the number of feeding openings There are five blast air oxygen-rich concentrations of 80% to 85%, melt temperature of 1220 ° C to 1280 ° C, melt pool depth of 2500mm, furnace height from the bottom to the top of the furnace, 7800mm, and the gas layer structure in the furnace body 100 along the width direction W The dimensions are 6400mm.

Specific implementation five:

When processing 2 million tons of copper concentrate annually, the melting strength is 67t / m ² .d, the furnace area of the slag layer 113 in the melting zone is 90m ² , and the size of the slag layer 113 in the melting zone along the length direction L is 20m. The furnace body width of 113 is 4.5m, the pressure of the primary air outlet 104 is 0.18MPa-0.30MPa, the spacing of the primary air outlet 104 is 600mm, the number of primary air outlets 104 is 66, the diameter of the primary air outlet 104 is 54mm, and the number of the feeding openings 101 There are six blast air oxygen-rich concentrations of 80% to 85%, melt temperature of 1220 ° C to 1280 ° C, melt pool depth of 2500mm, furnace height from furnace bottom to furnace top of 8000mm, and the gas layer structure in the furnace body 100 along the width direction W The dimensions are 7000mm.

The side-blow furnace of the present disclosure adopts a wide furnace body and a blast furnace structure, which can reduce the length of the furnace body, reduce the number of furnace body feeding openings, expand the vertical sectional area of the furnace, reduce the flue gas flow rate, reduce the dust rate, and the smoke outlet. The size is more reasonable.

Although when the furnace body is wide, the blast pressure is also increased, and the kinetic energy consumption is increased, the amount of copper concentrate processed by a single side blowing furnace of the present disclosure is equal to the processing amount of two side blowing furnaces in the related art. Compared with the existing two side-blowing furnaces, the single side-blowing furnace occupies less floor space, less corresponding equipment, saves investment, saves manpower, and improves labor productivity. In comparison, economic benefits will be better.

For processing copper concentrates of the same scale, one large side-blown smelting furnace system is used than the two small side-blown smelting furnace systems. The corresponding investment in smelting system civil construction and equipment can save about 200 million yuan (35 million yuan for civil construction and 165 million for equipment). Yuan), the annual depreciation fee is 15.15 million yuan (3500/25 + 16500/12 = 15.15 million yuan), 120 operators are less, and the salary is 75,000 yuan / person. The annual salary is 9 million yuan, which is increased due to the increase in air pressure. The cost is 2.2 million yuan (500 degrees / h × 8000h × 0.55 yuan / degree = 2.2 million yuan), and the annual cost savings are about 1515 + 900-220 = 21.95 million yuan, equivalent to 55 yuan per ton of copper.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the above description, many specific details are provided to give a full understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other instances, well-known structures, materials, or operations have not been shown or described in detail to avoid obscuring aspects of the present disclosure.

Claims

A copper smelting device includes:

A furnace body, which is provided with a copper grate layer, a slag layer, and a gas layer in order from bottom to top;

A feeding port is arranged on the top wall of the furnace body;

The smoke outlet is arranged on the top wall of the furnace body;

A slag outlet is provided at one end of the furnace body;

A copper gate is disposed at an end of the furnace body opposite to the slag outlet, and the copper gate is located at the bottom of the copper gate layer;

The primary air vent is located on the side wall corresponding to the slag layer of the furnace body, and is used to blow oxygen-enriched air into the slag layer. The width dimension of the inner side wall corresponding to the slag layer is greater than 2.5m and Less than or equal to 4.5m.
The copper smelting device according to claim 1, wherein the size in the height direction of the cavity inside the furnace is 6m to 8m.
The copper smelting device according to claim 1, wherein a widthwise dimension of the gas layer is 4.1m-7m.
The copper smelting device according to any one of claims 1 to 3, wherein a blowing pressure of the primary tuyere is 0.12 MPa to 0.3 MPa.
The copper smelting device according to claim 1, wherein the copper smelting device further comprises a secondary tuyere disposed on a side wall corresponding to the gas layer.
The copper smelting device according to claim 1, wherein the number of the primary air vents is plural, and the distance between adjacent primary air vents is 500-600 mm.
The copper smelting device according to claim 1, wherein an inner cavity of the copper smelting device is provided with a partition wall in a width direction, and the partition wall divides the internal cavity into a melting area and a settlement area, and the partition wall There is a distance from the top wall of the furnace body.
The copper smelting device according to claim 7, wherein the length of the smelting zone is 12m-20m.
The copper smelting device according to claim 7, wherein the settling zone is provided with a heating electrode and / or a burner for holding or heating the settling zone.