CN215440636U

CN215440636U - Treatment facility of copper-containing mud

Info

Publication number: CN215440636U
Application number: CN202120906987.9U
Authority: CN
Inventors: 孙晓峰; 王琛; 陆金忠; 刘恺; 李晓霞; 李海春; 吴玲; 李鸿飞; 赵永成; 潘璐
Original assignee: China ENFI Engineering Corp
Current assignee: China ENFI Engineering Corp
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2022-01-07
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a treatment device for sludge containing copper. The treatment equipment for the copper-containing sludge comprises a bottom blowing furnace, wherein the bottom blowing furnace comprises a furnace body and a bottom blowing spray gun, a furnace chamber of the furnace body comprises a reaction area and a settling area, a feed inlet is formed in the part of the furnace body opposite to the reaction area, a slag outlet and a mixed melt outlet are formed in the part of the furnace body opposite to the settling area, and the bottom blowing spray gun is arranged on the part of the furnace body opposite to the reaction area. The copper-containing sludge treatment equipment provided by the embodiment of the utility model has the advantages of low construction cost, low operation cost (low copper-containing sludge treatment cost), high safety and the like.

Description

Treatment facility of copper-containing mud

Technical Field

The utility model relates to the field of metallurgy, in particular to a copper-containing sludge treatment device.

Background

The copper-containing sludge may be treated in the related art using a side-blown bath smelting process. However, the shaft and hearth of a side-blown furnace that implements the side-blown bath smelting process are provided with a large number of copper water jackets to protect the furnace bricks and side-blown lances. For example, the weight of the copper water jacket of a 20 square meter side-blown converter is about 300t to 500t, resulting in high manufacturing costs of the side-blown converter. Moreover, the copper water jacket is easily burnt through, resulting in furnace death or melt explosion due to the entry of cooling water into the high temperature melt. In addition, a large amount of circulating water is consumed in the operation process of the side-blown converter. For example, a side-blown furnace of 20 square meters consumes 1500t to 2000t of water per hour, resulting in high operating costs of the side-blown furnace.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the utility model provides a copper-containing sludge treatment device.

The copper-containing sludge treatment equipment comprises a bottom blowing furnace, wherein the bottom blowing furnace comprises a furnace body and a plurality of bottom blowing spray guns, a furnace chamber of the furnace body comprises a reaction area and a settling area, a feed inlet is formed in the part of the furnace body, which is opposite to the reaction area, a slag outlet and a mixed melt outlet are formed in the part of the furnace body, which is opposite to the settling area, and the bottom blowing spray guns are arranged on the part of the furnace body, which is opposite to the reaction area.

The copper-containing sludge treatment equipment has the advantages of low construction cost, low operation cost (low copper-containing sludge treatment cost) and high safety.

Optionally, the bottom-blowing furnace is a rotary furnace, and the bottom-blowing furnace further comprises a driving device for driving the furnace body to rotate.

Optionally, the bottom-blowing lance comprises an inner passage for blowing reductant fuel into the reaction zone and an outer passage for blowing oxygen-enriched gas into the reaction zone.

Optionally, the bottom-blowing lance comprises an inner passage for blowing reductant fuel into the reaction zone and an outer passage for blowing oxygen-enriched gas into the reaction zone, the processing apparatus further comprising: the device comprises a first pressure detector and a second pressure detector, wherein the first pressure detector is arranged on a first air supply pipe connected with an inner channel of the bottom blowing spray gun, and the second pressure detector is arranged on a second air supply pipe connected with an outer channel of the bottom blowing spray gun; and an emergency gas tank connected with each of the first and second gas supply pipes, the emergency gas tank having an on-off valve.

Optionally, the treatment equipment for the copper-containing sludge further comprises a drying device, and a discharge hole of the drying device is communicated with the feed inlet of the furnace body.

Optionally, the copper-containing sludge treatment equipment further comprises a hot air furnace, and a hot air outlet of the hot air furnace is communicated with a hot air inlet of the drying device.

Optionally, the copper-containing sludge treatment equipment further comprises a water slag crushing tank, and the slag outlet of the furnace body is connected with the water slag crushing tank through a first launder.

Optionally, the copper-containing sludge treatment equipment further comprises a casting machine, and the mixed melt outlet of the furnace body is connected with the mixed melt inlet of the casting machine through a second launder.

Optionally, emergent gas holder includes emergent inert gas holder and emergent compressed air gas holder, emergent inert gas holder with first air supply pipe links to each other, emergent compressed air gas holder with the second air supply pipe links to each other, controlling means with emergent inert gas holder with the ooff valve of each in the emergent compressed air gas holder links to each other.

Optionally, the angle of the bottom blowing lance to the vertical is in the range of 10 to 45 degrees.

Drawings

FIG. 1 is a flow diagram of a method of treating copper-containing sludge according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of a bottom-blowing furnace of a copper-containing sludge treatment facility according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

A method for treating copper-containing sludge according to an embodiment of the present invention is described below with reference to the accompanying drawings. As shown in fig. 1, the method for treating copper-containing sludge according to the embodiment of the present invention includes the steps of:

drying the copper-containing sludge to obtain dried copper-containing sludge, wherein the water content of the dried copper-containing sludge is more than or equal to a first preset value and less than or equal to a second preset value; and

and carrying out bottom blowing smelting on the dried copper-containing sludge, the slagging agent and the reducing agent in a preset proportion.

The term "copper-containing sludge" refers to sludge containing copper elements, and includes not only sludge having copper elements by itself, but also sludge doped with copper elements. For example, the sludge with copper element can be from surface treatment, electroplating, printed circuit board, wire and cable industries, and the sludge with copper element can be obtained by doping the sludge obtained from sewage treatment with copper element.

According to the method for treating the copper-containing sludge, provided by the embodiment of the utility model, the dried copper-containing sludge is subjected to bottom-blowing smelting, so that the copper-containing sludge with high water content does not need to be baked into lump materials, and three steps of material mixing, baking and brick making are omitted. Therefore, the process for treating the copper-containing sludge can be simplified, the energy consumption for treating the copper-containing sludge can be reduced, and the pollution to the environment can be greatly reduced.

Since the treatment method of the copper-containing sludge according to the embodiment of the present invention performs bottom-blowing smelting on the dried copper-containing sludge, the bottom-blowing smelting of the treatment method of the copper-containing sludge according to the embodiment of the present invention can be performed by using a bottom-blowing furnace. Therefore, only copper water jackets are needed to be arranged at the smoke outlet, the slag outlet and the mixed melt outlet of the bottom-blowing furnace, so that the construction cost and the operation cost of the bottom-blowing furnace can be greatly reduced, and the treatment cost of the copper-containing sludge can be greatly reduced.

Moreover, because the bottom blowing furnace is provided with few parts of the copper water jacket, the risk that cooling water flows into the furnace due to the burning-through of the copper water jacket can be greatly reduced, and the safety of the method for treating the copper-containing sludge according to the embodiment of the utility model can be improved. In addition, only a small amount of cooling water is needed in the bottom blowing smelting process (namely, the bottom blowing furnace is in the operation process) for implementing the treatment method of the copper-containing sludge according to the embodiment of the utility model, so that the heat taken away by the cooling water is little, the heat loss can be reduced, the fuel consumption can be reduced, and the treatment cost of the copper-containing sludge can be further reduced.

Therefore, the method for treating the copper-containing sludge has the advantages of low operation cost (low treatment cost of the copper-containing sludge), high safety and the like.

In some embodiments of the utility model, the copper-containing sludge has a water content of 70% to 75%. The water content of the copper-containing sludge is equal to the mass of water in the copper-containing sludge/the mass of the copper-containing sludge. Alternatively, the copper-containing sludge may be fed into a drying device (e.g. a sludge dryer) by means of a loader or a grab crane, into which hot flue gas at 600-800 degrees celsius generated by a hot blast stove is fed, and the copper-containing sludge is dried by means of the hot flue gas so as to obtain a dried copper-containing sludge. Optionally, collecting soot from the flue gas discharged from the drying apparatus, which soot may be added to the dried copper-containing sludge for use as raw material for the bottom-blowing smelting. The flue gas after dust removal can be sent to desulfurization treatment, and the tail gas reaching the standard can be discharged into the environment.

The water content of the dried copper-containing sludge is more than or equal to 30% and less than or equal to 50%, namely the first preset value is 30%, and the second preset value is 50%. Optionally, the moisture content of the dried copper-containing sludge is greater than or equal to 40% and less than or equal to 45%, that is, the first preset value is 40%, and the second preset value is 45%.

The dried copper-containing sludge can be transported to a mine pit through a belt conveyor for storage, and when the dried copper-containing sludge is treated, the dried copper-containing sludge can be transported from the mine pit to a storage bin. In addition, the dried copper-containing sludge may be conveyed directly into a silo.

Special bins can be respectively arranged for the dried copper-containing sludge, the slagging agent and the reducing agent, and the dried copper-containing sludge, the slagging agent and the reducing agent with different proportions are added according to the process requirements through a quantitative feeder below the bins. Alternatively, the mass ratio of the dried copper-containing sludge, the slag former and the reductant may be 1: (0.05-0.15): (0.1-0.3). Optionally, the mass ratio of the dry copper-containing sludge, the slagging agent and the reducing agent is 1: (0.07-0.09): (0.12-0.18).

Alternatively, the reducing agent may be coal fines and the slagging agent may include quartzite, limestone and hematite. The mass ratio of the quartz stone, the limestone and the hematite is (8-12) to (5-7) to (1-3).

As shown in fig. 2, the copper-containing sludge treatment apparatus according to the embodiment of the present invention includes a bottom-blowing furnace 1, the bottom-blowing furnace 1 includes a furnace body 10 and a bottom-blowing lance 20, and a furnace chamber of the furnace body 10 includes a reaction zone and a settling zone. The bottom-blowing lance 20 is plural. A feed port 120 is provided on a portion of the furnace body 10 opposite to the reaction zone, and a slag outlet 130 and a mixed melt outlet 140 are provided on a portion of the furnace body 10 opposite to the settling zone. The bottom-blowing lance 20 is provided on a portion of the furnace body 10 opposite to the reaction zone.

The bottom-blowing furnace 1 of the copper-containing sludge treatment apparatus according to the embodiment of the present invention may be used to carry out the bottom-blowing smelting. According to the treatment equipment of the copper-containing sludge, disclosed by the embodiment of the utility model, the bottom-blowing smelting is carried out by utilizing the bottom-blowing furnace 1, so that the copper-containing sludge with high water content does not need to be baked into lump materials, namely three steps of material mixing, baking and brick making are omitted. Therefore, the process for treating the copper-containing sludge can be simplified, the energy consumption for treating the copper-containing sludge can be reduced, and the pollution to the environment can be greatly reduced.

Moreover, only the smoke outlet, the slag outlet and the mixed melt outlet of the bottom-blowing furnace 1 need to be provided with copper water jackets, so that the construction cost and the operation cost of the bottom-blowing furnace 1 can be greatly reduced, and the treatment cost of the copper-containing sludge can be greatly reduced. Furthermore, the bottom-blowing furnace 1 only needs a small amount of cooling water during operation, so that the cooling water takes away little heat, thereby reducing heat loss, reducing fuel consumption and further reducing the treatment cost of the copper-containing sludge.

Moreover, since the bottom-blowing furnace 1 has few parts provided with the copper water jacket, the risk of cooling water flowing into the furnace due to burning through of the copper water jacket can be greatly reduced, and thus the safety of the copper-containing sludge treatment equipment and the bottom-blowing furnace 1 according to the embodiment of the utility model can be improved.

Therefore, the copper-containing sludge treatment equipment has the advantages of low construction cost, low operation cost (low copper-containing sludge treatment cost), high safety and the like.

The dried copper-containing sludge, the slag former and the reductant are fed into the reaction zone of the bottom blowing furnace 1 through a feed inlet 10. The bottom blowing lance 20 may be a two-pass bottom blowing lance, the inner passage of the bottom blowing lance 20 may blow fuel (natural gas or pulverized coal) into the reaction zone, and the outer passage of the bottom blowing lance 20 may blow the oxygen-enriched gas into the reaction zone. That is, the bottom-blowing lance 20 includes an inner passage for blowing the reducing agent into the reaction zone and an outer passage for blowing the oxygen-rich gas into the reaction zone.

Alternatively, the angle of the bottom-blowing lance 20 to the vertical is in the range of 10 to 45 degrees, i.e. the bottom-blowing lance 20 may be arranged obliquely. The single-row bottom-blowing spray guns 20 can be arranged, the double-row bottom-blowing spray guns 20 can also be arranged, and the included angle of the two rows of bottom-blowing spray guns 20 is in the range of 30-45 degrees.

Alternatively, the oxygen concentration of the oxygen-enriched gas may be 40% to 65%. The oxygen concentration of the oxygen-enriched gas is the volume percentage of the oxygen in the oxygen-enriched gas to the volume of the oxygen-enriched gas, that is, the oxygen concentration of the oxygen-enriched gas is equal to the volume of the oxygen in the oxygen-enriched gas/the volume of the oxygen-enriched gas. The pressure of the oxygen-enriched gas is 0.3MPa-0.6MPa, and the pressure of the fuel gas is 0.3MPa-0.6 MPa. Optionally, the oxygen-enriched gas has a pressure of 0.35MPa to 0.55MPa and the fuel gas has a pressure of 0.35MPa to 0.55 MPa.

The oxygen-enriched gas (e.g., oxygen-enriched air) and the fuel gas blown from the bottom-blowing lance 20 agitate the melt and materials in the reaction zone together to allow the reduction reaction to proceed sufficiently. The temperature of the molten pool is controlled between 1200 ℃ and 1500 ℃, and the dried copper-containing sludge is reduced into mixed melt of black copper and copper matte (matte) under the high-temperature condition. In other words, the bottom-blowing smelting (reduction smelting) is performed at 1200-1500 degrees celsius, and optionally, the bottom-blowing smelting is performed at 1250-1350 degrees celsius.

Since the bottom-blowing lance 20 is not provided on the portion of the furnace body 10 opposite to the settling zone, the mixed melt is stirred to a low degree, and the slag and the mixed melt are layered due to the difference in gravity. The slag and the mixed melt may be discharged every 1-2 hours. The slag is discharged from the slag outlet 130, and the discharged slag flows into the water granulated slag pool through the launder and the slag flushing launder, resulting in harmless water granulated slag. The mixed melt is discharged from the mixed melt outlet 140, and the discharged mixed melt may be discharged through a launder into a casting machine (e.g., a disc casting machine) to be cast into a copper ingot, which is cooled and layered to obtain a black copper layer and a copper matte layer, which are separated. Furthermore, the mixed melt may be subjected to converting to obtain blister copper, which is further subjected to fire refining to obtain anode copper. For example, the mixed melt is discharged into a coarse copper cladding, lifted by a crane and fed into a converting furnace and an anode furnace for further purification to obtain anode copper.

Optionally, the mixed melt in a settled state is heated by means of an electrode in order to reduce the copper content of the slag. For example, the electrode may be provided on a portion of the furnace body 10 opposite to the reaction zone.

As shown in fig. 2, the bottom-blowing furnace 1 may be a rotary furnace, and the bottom-blowing furnace 1 further includes a driving device for driving the furnace body 10 to rotate. When the rotary furnace is used for bottom-blowing smelting, when the pressure of at least one of the oxygen-rich gas and the fuel gas is lower than the preset pressure, an emergency gas source is used for providing gas with the pressure of 0.3MPa-0.6MPa to the bottom-blowing lance 20, and the rotary furnace is rotated so that the muzzle of the bottom-blowing lance 20 is separated from the mixed melt. That is, the pressure of at least one of the oxygen-enriched gas and the fuel gas is controlled in interlock with the emergency gas source and the rotation of the rotary kiln.

By utilizing the emergency gas source to provide gas with the pressure of 0.3MPa-0.6MPa to the bottom-blowing spray gun 20, the pressure of the gas sprayed out of the bottom-blowing spray gun 20 in the rotating process of the rotary furnace can be ensured to be stable, so that the mixed melt in the rotary furnace is prevented from entering the bottom-blowing spray gun 20. By controlling the pressure of at least one of the oxygen-enriched gas and the fuel gas, the emergency gas source and the rotation of the rotary furnace in an interlocking manner, sudden accidents such as gas cut, power failure and the like can be effectively dealt with, so that the bottom-blowing spray gun 20 is prevented from being blocked, and the safety of the rotary furnace is improved.

Optionally, the preset pressure is 0.3 MPa. Wherein the pressure of the oxygen-enriched gas is the pressure of the oxygen-enriched gas before entering the bottom-blowing lance 20, and the pressure of the fuel gas is the pressure of the fuel gas before entering the bottom-blowing lance 20. After the muzzle of the bottom-blowing spray gun 20 is separated from the mixed melt, the furnace body 10 can be insulated, and production can be resumed after the gas source is resumed. If the production cannot be recovered in a short time, the mixed melt in the furnace body 10 can be emptied and the furnace body 10 is insulated so as to avoid the influence of rapid cooling and rapid heating on the service life of furnace bricks of the furnace body 10.

Alternatively, the bottom-blowing lance 20 has an inner passage and an outer passage, and when at least one of the oxygen-rich gas and the fuel gas has a pressure less than a preset pressure, the inert gas having a pressure of 0.3MPa to 0.6MPa is supplied to the inner passage of the bottom-blowing lance 20, and the compressed air having a pressure of 0.3MPa to 0.6MPa is supplied to the outer passage of the bottom-blowing lance 20. Therefore, the emergency response cost can be reduced, and safety accidents caused by inert gas leakage can be reduced.

The utility model also provides a treatment device for the copper-containing sludge. The copper-containing sludge treatment equipment comprises a hot blast stove, a drying device and a bottom blowing furnace 1, wherein a hot blast inlet of the drying device is communicated with a hot blast outlet of the hot blast stove.

The bottom blowing furnace 1 comprises a furnace body 10 and a bottom blowing lance 20, and a furnace chamber of the furnace body 10 comprises a reaction zone and a settling zone. A feed port 120 is provided on a portion of the furnace body 10 opposite to the reaction zone, and a slag outlet 130 and a mixed melt outlet 140 are provided on a portion of the furnace body 10 opposite to the settling zone. The bottom-blowing lance 20 is provided on a portion of the furnace body 10 opposite to the reaction zone. Alternatively, the bottom-blowing furnace 1 is a rotary kiln.

Therefore, the copper-containing sludge treatment equipment has the advantages of low manufacturing cost, low operation cost, high safety and the like.

Optionally, the bottom-blowing lance 20 is a two-pass bottom-blowing lance, and the processing apparatus further comprises a first pressure detector, a second pressure detector, an emergency gas reservoir and a control device. The first pressure detector is provided on a first air supply pipe connected to the inner passage of the bottom-blowing lance 20, and the second pressure detector is provided on a second air supply pipe connected to the outer passage of the bottom-blowing lance 20. The emergency gas tank is connected to each of the first and second gas supply pipes to provide emergency gas to each of the first and second gas supply pipes.

The control device is connected with each of the first pressure detector and the second pressure detector, the control device is connected with the switch valve of the emergency gas storage tank, the control device is connected with the driving device for driving the rotary kiln to rotate, so that the control device controls the switch valve and the driving device according to the pressure detection value of at least one of the first pressure detector and the second pressure detector.

Specifically, when the pressure detection value of at least one of the first pressure detector and the second pressure detector is smaller than a preset value (for example, the preset value may be 0.3MPa), the control device may control the on-off valve to be opened so that the emergency gas storage tank provides emergency gas to the bottom-blowing lance 20 through the first gas supply pipe and the second gas supply pipe, and the control device may control the driving device to operate so that the driving device drives the rotary kiln to rotate. When the pressure detection value of each of the first pressure detector and the second pressure detector is greater than or equal to the preset value, the control device controls the switch valve to close.

Optionally, the emergency gas tank comprises an emergency inert gas tank connected to the first gas supply pipe and an emergency compressed air tank connected to the second gas supply pipe. The control device is connected with the on-off valve of each of the emergency inert gas storage tank and the emergency compressed air storage tank.

Whereby inert gas can be supplied to the inner passages of the bottom-blowing lance 20 and compressed air can be supplied to the outer passages of the bottom-blowing lance 20. Through setting up this emergent compressed air gas holder to not only can reduce the cost of emergent reply, can reduce moreover and lead to the incident because of inert gas leaks.

Optionally, the treatment equipment further comprises a hot blast stove, a drying device, a water slag crushing tank and a casting machine. The hot air inlet of the drying device is communicated with the hot air outlet of the hot air furnace, and the feed inlet 120 is connected with the discharge hole of the drying device. The slag outlet 130 is connected to the water slag basin by a first launder and the mixed melt outlet 140 is connected to the mixed melt inlet of the casting machine by a second launder.

Example 1

Adding copper-containing sludge with the water content of 70% into a sludge dryer through a grab crane, heating flue gas in a hot blast furnace to 750 ℃, then blowing the flue gas into the sludge dryer, and enabling the dryer to produce dried copper-containing sludge with the water content of 45%. The smoke dust collected by the dust collector is mixed with the dried copper-containing sludge uniformly and then participates in batching.

And (4) grabbing the dried copper-containing sludge, quartz stone, limestone, hematite and pea coal into corresponding bins, and batching by a quantitative feeder. Wherein the mass ratio of the dry copper-containing sludge to the slagging agent to the reducing agent is 1: 0.05: 0.1, and the mass ratio of the quartz stone, the limestone and the hematite is 10: 6: 1.

Dry copper-containing sludge, quartzite, limestone, hematite and coal particles are fed from feed inlet 120 and fall into the reaction zone. Oxygen-rich gas and fuel gas were blown into the reaction zone through a double-pass bottom-blowing lance 20 located at the bottom of the bottom-blowing furnace 1 directly below, and the amount of natural gas blown into the inner passage of each bottom-blowing lance 20 was 100Nm³Per hour, the oxygen-enriched gas is blown into the outer passage of each bottom-blowing lance 20 in an amount of 350Nm³The oxygen concentration of the oxygen-enriched gas is 60 percent, and the pressure of the oxygen-enriched gas and the fuel gas is 0.4 MPa.

The bath temperature was controlled at 1250 ℃. Under the condition of high temperature, the dried copper-containing sludge and the auxiliary materials are fully contacted and reacted in the reaction area to form slag and mixed melt. In the settling zone, the melt agitation slows and the slag and mixed melt stratify due to different gravity. The slag was discharged every 1.5 hours, the temperature of the slag being 1250 ℃. The slag is discharged from the slag outlet 130 and enters the water granulated slag pool through the launder and the slag flushing launder to obtain harmless glass state water granulated slag. The mixed melt of the black copper and the copper matte is discharged once every 2 hours, and the temperature of the mixed melt is 1230 ℃. And discharging the mixed melt of the black copper and the copper matte from the mixed melt outlet 140, discharging the mixed melt into a disc casting machine through a launder, casting into ingots, and separating the black copper and the copper matte after the copper ingots are cooled and layered.

And (3) processing results: the resulting black copper contained 85 wt% Cu and 3.45 wt% S; the resulting copper matte contained 56 wt% Cu and 22.5 wt% S; the obtained water slag contains 0.50 wt% of Cu, and the recovery rate of copper reaches more than 90%. Under the same production scale, the fuel rate of the treatment method and the treatment equipment of the embodiment is 20 percent lower than that of side-blown smelting, and the energy consumption of the whole system is 18 percent lower than that of the side-blown smelting.

Example 2

Adding copper-containing sludge with the water content of 70% into a sludge dryer through a grab crane, heating flue gas in a hot blast furnace to 750 ℃, then blowing the flue gas into the sludge dryer, and enabling the dryer to produce dried copper-containing sludge with the water content of 40%. The smoke dust collected by the dust collector is mixed with the dried copper-containing sludge uniformly and then participates in batching.

And (4) grabbing the dried copper-containing sludge, quartz stone, limestone, hematite and pea coal into corresponding bins, and batching by a quantitative feeder. Wherein the mass ratio of the dry copper-containing sludge to the slagging agent to the reducing agent is 1: 0.15: 0.3, the mass ratio of the quartz stone, the limestone and the hematite is 10: 6: 1.2.

Dry copper-containing sludge, quartzite, limestone, hematite and coal particles are fed from feed inlet 120 and fall into the reaction zone. Oxygen-enriched gas and fuel gas were blown into the reaction zone through a double-pass bottom-blowing lance 20 located at the bottom of the bottom-blowing furnace 1 directly below, and the amount of natural gas blown into the inner passage of each bottom-blowing lance 20 was 80Nm³The oxygen-enriched gas is blown into the outer passage of each bottom-blowing lance 20 in an amount of 330 Nm/h³The oxygen concentration of the oxygen-enriched gas is 60 percent, and the pressure of the oxygen-enriched gas and the fuel gas is 0.45 MPa.

The bath temperature was controlled at 1280 ℃. Under the condition of high temperature, the dried copper-containing sludge and the auxiliary materials are fully contacted and reacted in the reaction area to form slag and mixed melt. In the settling zone, the melt agitation slows and the slag and mixed melt stratify due to different gravity. The slag was discharged every 1.8 hours, the temperature of the slag being 1280 ℃. The slag is discharged from the slag outlet 130 and enters the water granulated slag pool through the launder and the slag flushing launder to obtain harmless glass state water granulated slag. The mixed melt of the black copper and the copper matte is discharged once every 2.5 hours, and the temperature of the mixed melt is 1260 ℃. And discharging the mixed melt of the black copper and the copper matte from the mixed melt outlet 140, discharging the mixed melt into a disc casting machine through a launder, casting into ingots, and separating the black copper and the copper matte after the copper ingots are cooled and layered.

And (3) processing results: the resulting black copper contained 84.5 wt% Cu and 3.32 wt% S; the resulting copper matte contained 55.6 wt% Cu and 22.8 wt% S; the obtained water slag contains 0.49 wt% of Cu, and the recovery rate of copper reaches more than 91%. Under the same production scale, the fuel rate of the treatment method and the treatment equipment of the embodiment is 20 percent lower than that of side-blown smelting, and the energy consumption of the whole system is 18 percent lower than that of the side-blown smelting.

Example 3

Adding copper-containing sludge with the water content of 72% into a sludge dryer through a grab crane, heating flue gas in a hot blast furnace to 750 ℃, then blowing the flue gas into the sludge dryer, and enabling the dryer to produce dried copper-containing sludge with the water content of 30%. The smoke dust collected by the dust collector is mixed with the dried copper-containing sludge uniformly and then participates in batching.

And (4) grabbing the dried copper-containing sludge, quartz stone, limestone, hematite and pea coal into corresponding bins, and batching by a quantitative feeder. Wherein the mass ratio of the dry copper-containing sludge to the slagging agent to the reducing agent is 1: 0.1: 0.2, the mass ratio of the quartz stone, the limestone and the hematite is 10: 6.5: 1.5.

Dry copper-containing sludge, quartzite, limestone, hematite and coal particles are fed from feed inlet 120 and fall into the reaction zone. Oxygen-enriched gas and fuel are blown into the reaction zone through a double-channel bottom-blowing lance 20 located at the bottom of the bottom-blowing furnace 1, and the amount of natural gas blown into the inner channel of each bottom-blowing lance 20 is 120Nm³The oxygen-enriched gas is blown into the outer passage of each bottom-blowing lance 20 in an amount of 360Nm³The oxygen concentration of the oxygen-enriched gas is 60 percent, and the pressure of the oxygen-enriched gas and the fuel gas is 0.6 MPa.

The temperature of the molten pool was controlled to 1300 ℃. Under the condition of high temperature, the dried copper-containing sludge and the auxiliary materials are fully contacted and reacted in the reaction area to form slag and mixed melt. In the settling zone, the melt agitation slows and the slag and mixed melt stratify due to different gravity. The slag was discharged every 1.5 hours, the temperature of the slag being 1300 ℃. The slag is discharged from the slag outlet 130 and enters the water granulated slag pool through the launder and the slag flushing launder to obtain harmless glass state water granulated slag. The mixed melt of the black copper and the copper matte is discharged once every 2 hours, and the temperature of the mixed melt is 1280 ℃. And discharging the mixed melt of the black copper and the copper matte from the mixed melt outlet 140, discharging the mixed melt into a disc casting machine through a launder, casting into ingots, and separating the black copper and the copper matte after the copper ingots are cooled and layered.

And (3) processing results: the resulting black copper contained 84.2 wt% Cu and 3.22 wt% S; the resulting copper matte contained 56.2 wt% Cu and 23.6 wt% S; the obtained water slag contains 0.48 wt% of Cu, and the recovery rate of copper reaches more than 91%. Under the same production scale, the fuel rate of the treatment method and the treatment equipment of the embodiment is 18 percent lower than that of side-blown smelting, and the energy consumption of the whole system is 17 percent lower than that of the side-blown smelting.

Example 4

Adding copper-containing sludge with the water content of 75% into a sludge dryer through a grab crane, heating flue gas in a hot blast furnace to 750 ℃, then blowing the flue gas into the sludge dryer, and enabling the dryer to produce dried copper-containing sludge with the water content of 50%. The smoke dust collected by the dust collector is mixed with the dried copper-containing sludge uniformly and then participates in batching.

And (4) grabbing the dried copper-containing sludge, quartz stone, limestone, hematite and pea coal into corresponding bins, and batching by a quantitative feeder. Wherein the mass ratio of the dry copper-containing sludge to the slagging agent to the reducing agent is 1: 0.07: 0.12, and the mass ratio of the quartz stone, the limestone and the hematite is 10: 6.5: 1.8.

Dry copper-containing sludge, quartzite, limestone, hematite and coal particles are fed from feed inlet 120 and fall into the reaction zone. Oxygen-enriched gas and fuel are blown into the reaction zone through a double-channel bottom-blowing lance 20 located at the bottom of the bottom-blowing furnace 1, and the amount of natural gas blown into the inner channel of each bottom-blowing lance 20 is 120Nm³The oxygen-enriched gas is blown into the outer passage of each bottom-blowing lance 20 in an amount of 360Nm³The oxygen concentration of the oxygen-enriched gas is 60 percent, and the pressure of the oxygen-enriched gas and the fuel gas is 0.35 MPa.

The bath temperature was controlled to 1350 ℃. Under the condition of high temperature, the dried copper-containing sludge and the auxiliary materials are fully contacted and reacted in the reaction area to form slag and mixed melt. In the settling zone, the melt agitation slows and the slag and mixed melt stratify due to different gravity. The slag was discharged every 1.5 hours, the temperature of the slag being 1350 ℃. The slag is discharged from the slag outlet 130 and enters the water granulated slag pool through the launder and the slag flushing launder to obtain harmless glass state water granulated slag. The mixed melt of the black copper and the copper matte is discharged every 2 hours, and the temperature of the mixed melt is 1330 ℃. And discharging the mixed melt of the black copper and the copper matte from the mixed melt outlet 140, discharging the mixed melt into a disc casting machine through a launder, casting into ingots, and separating the black copper and the copper matte after the copper ingots are cooled and layered.

And (3) processing results: the obtained black copper contained 83.38 wt% of Cu and 3.16 wt% of S; the resulting copper matte contained 56.6 wt% Cu and 25.3 wt% S; the obtained water granulated slag contains 0.47 wt% of Cu, and the recovery rate of copper reaches more than 91%. Under the same production scale, the fuel rate of the treatment method and the treatment equipment of the embodiment is 17.5 percent lower than that of side-blown smelting, and the energy consumption of the whole system is 16.5 percent lower than that of the side-blown smelting.

Example 5

Adding copper-containing sludge with the water content of 75% into a sludge dryer through a grab crane, heating flue gas in a hot blast furnace to 750 ℃, then blowing the flue gas into the sludge dryer, and enabling the dryer to produce dried copper-containing sludge with the water content of 45%. The smoke dust collected by the dust collector is mixed with the dried copper-containing sludge uniformly and then participates in batching.

And (4) grabbing the dried copper-containing sludge, quartz stone, limestone, hematite and pea coal into corresponding bins, and batching by a quantitative feeder. Wherein the mass ratio of the dry copper-containing sludge to the slagging agent to the reducing agent is 1: 0.09: 0.18, and the mass ratio of the quartz stone, the limestone and the hematite is 12: 7: 2.

Dry copper-containing sludge, quartzite, limestone, hematite and coal particles are fed from feed inlet 120 and fall into the reaction zone. Oxygen-enriched gas and fuel were blown into the reaction zone through a double-pass bottom-blowing lance 20 located at the bottom of the bottom-blowing furnace 1 directly below the bottom-blowing lance, and the amount of natural gas blown into the inner passage of each bottom-blowing lance 20 was 150Nm³The oxygen-enriched gas is blown into the outer passage of each bottom-blowing lance 20 in an amount of 380 Nm/h³H, the oxygen concentration of the oxygen-enriched gas is 65 percent,the pressure of the oxygen-enriched gas and the fuel gas is 0.4 MPa.

The temperature of the molten pool was controlled to 1400 ℃. Under the condition of high temperature, the dried copper-containing sludge and the auxiliary materials are fully contacted and reacted in the reaction area to form slag and mixed melt. In the settling zone, the melt agitation slows and the slag and mixed melt stratify due to different gravity. The slag was discharged every 1.5 hours, the temperature of the slag being 1400 ℃. The slag is discharged from the slag outlet 130 and enters the water granulated slag pool through the launder and the slag flushing launder to obtain harmless glass state water granulated slag. The mixed melt of the black copper and the copper matte is discharged once every 2 hours, and the temperature of the mixed melt is 1380 ℃. And discharging the mixed melt of the black copper and the copper matte from the mixed melt outlet 140, discharging the mixed melt into a disc casting machine through a launder, casting into ingots, and separating the black copper and the copper matte after the copper ingots are cooled and layered. And (3) processing results: the obtained black copper contained 83 wt% of Cu and 3.05 wt% of S; the resulting copper matte contained 57.6 wt% Cu and 25.1 wt% S; the obtained water slag contains 0.46 wt% of Cu, and the recovery rate of copper reaches more than 92%. Under the same production scale, the fuel rate of the treatment method and the treatment equipment of the embodiment is 17 percent lower than that of side-blown smelting, and the energy consumption of the whole system is 16 percent lower than that of the side-blown smelting.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The utility model provides a treatment facility of copper-containing sludge, its characterized in that includes the bottom-blowing stove, the bottom-blowing stove includes furnace body and bottom-blowing spray gun, the bottom-blowing spray gun is a plurality of, the furnace chamber of furnace body includes reaction zone and settling zone, the furnace body with be equipped with the feed inlet on the part relative in reaction zone, the furnace body with be equipped with slag outlet and mixed melt export on the part relative in settling zone, the bottom-blowing spray gun is established the furnace body with on the part relative in reaction zone.

2. The copper-containing sludge treatment plant according to claim 1, wherein the bottom-blowing furnace is a rotary furnace, and the bottom-blowing furnace further comprises a driving device for driving the furnace body to rotate.

3. The copper-containing sludge treatment plant according to claim 1 wherein the bottom blowing lance comprises an inner passage for blowing a reductant into the reaction zone and an outer passage for blowing an oxygen-enriched gas into the reaction zone.

4. The copper-containing sludge treatment plant according to claim 2 wherein the bottom blowing lance comprises an inner passage for blowing a reductant into the reaction zone and an outer passage for blowing an oxygen-enriched gas into the reaction zone, the treatment plant further comprising:

the device comprises a first pressure detector and a second pressure detector, wherein the first pressure detector is arranged on a first air supply pipe connected with an inner channel of the bottom blowing spray gun, and the second pressure detector is arranged on a second air supply pipe connected with an outer channel of the bottom blowing spray gun; and

an emergency gas tank connected with each of the first and second gas supply pipes, the emergency gas tank having an on-off valve.

5. The copper-containing sludge treatment equipment according to claim 1, further comprising a drying device, wherein a discharge port of the drying device is communicated with the feed port of the furnace body.

6. The copper-containing sludge treatment apparatus according to claim 5, further comprising a hot air furnace, wherein a hot air outlet of the hot air furnace is communicated with a hot air inlet of the drying device.

7. The copper-containing sludge treatment facility in accordance with claim 1 further comprising a water granulated slag bath to which the slag outlet of the furnace body is connected by a first launder.

8. The copper-containing sludge treatment plant according to claim 1 further comprising a casting machine, wherein the mixed melt outlet of the furnace body is connected to a mixed melt inlet of the casting machine by a second launder.

9. The copper-containing sludge treatment plant according to claim 4 wherein said emergency gas tanks comprise an emergency inert gas tank and an emergency compressed air tank, said emergency inert gas tank being connected to said first gas supply pipe, said emergency compressed air tank being connected to said second gas supply pipe, said treatment plant further comprising a control device connected to an on-off valve of each of said emergency inert gas tank and said emergency compressed air tank.

10. The copper-containing sludge treatment plant according to claim 1 wherein the angle of the bottom blowing lance to the vertical is in the range of 10 to 45 degrees.