Oxygen-enriched bottom blowing converting furnace for converting liquid copper matte into copper
阅读说明：本技术 一种用于液态铜锍吹炼炼铜的富氧底吹吹炼炉 (Oxygen-enriched bottom blowing converting furnace for converting liquid copper matte into copper ) 是由 袁俊智 王新民 贺瑞萍 吴稳柱 蹇冬冬 刘华 于 2020-07-22 设计创作，主要内容包括：本发明提供的一种用于液态铜锍吹炼炼铜的富氧底吹吹炼炉,其特征在于,包括炉体、氧枪、托座、拖圈、齿圈和驱动装置；所述炉体内壁设置炉砖,所述炉砖内限定有炉膛,所述炉体底面平齐且所述炉体上设置有加料口、出铜口、出烟口、排渣口和形成于炉体底部的氧枪插孔,在炉砖与氧枪插孔之间填充有氧枪砖,所述氧枪砖外侧设置有法兰盖冷却套,所述所述法兰盖冷却套上设置有与氧枪插孔配合的氧枪孔；所述氧枪依次穿过法兰盖冷却套上的氧枪孔、炉体底部上的氧枪将富氧气体吹入到所述炉腔内的冰铜层内。本发明采用循环冷却水的方式将氧枪砖传递出的热量带走,达到对氧枪砖的降温效果,高了氧枪和氧枪砖的使用寿命。(The invention provides an oxygen-enriched bottom blowing converting furnace for converting copper into liquid copper matte, which is characterized by comprising a furnace body, an oxygen lance, a bracket, a drag ring, a gear ring and a driving device, wherein the oxygen lance is arranged in the furnace body; the furnace body is characterized in that furnace bricks are arranged on the inner wall of the furnace body, a hearth is limited in the furnace bricks, the bottom surface of the furnace body is flush, a charging port, a copper outlet, a smoke outlet, a slag outlet and oxygen lance insertion holes formed in the bottom of the furnace body are formed in the furnace body, oxygen lance bricks are filled between the furnace bricks and the oxygen lance insertion holes, a flange cover cooling sleeve is arranged on the outer side of each oxygen lance brick, and oxygen lance holes matched with the oxygen lance insertion holes are formed in the flange cover cooling sleeve; the oxygen lance sequentially penetrates through an oxygen lance hole on the flange cover cooling sleeve and an oxygen lance on the bottom of the furnace body to blow oxygen-enriched gas into the matte layer in the furnace cavity. The invention takes away the heat transferred by the oxygen lance brick by adopting a circulating cooling water mode, achieves the effect of cooling the oxygen lance brick and prolongs the service life of the oxygen lance and the oxygen lance brick.)
1. An oxygen-enriched bottom blowing converting furnace for converting copper from liquid copper matte is characterized by comprising a furnace body, an oxygen lance, a bracket, a drag ring, a gear ring and a driving device;
the furnace body is provided with a heating material port, a cooling material port, a copper outlet, a smoke outlet, a slag discharge port and an oxygen lance insertion hole formed in the bottom of the furnace body, wherein the furnace brick is arranged on the inner wall of the furnace body, a hearth is limited in the furnace brick, the bottom surface of the furnace body is flush, the furnace body is provided with the heating material port, the cooling material port, the copper outlet, the smoke outlet, the slag discharge port and the oxygen lance insertion hole, the oxygen lance brick is filled between the furnace brick and the oxygen lance insertion hole, the rear end of the oxygen lance brick is provided with;
wherein the oxygen lance sequentially penetrates through an oxygen lance hole on a flange plate of the water-cooling oxygen lance and an oxygen lance insertion hole at the bottom of the furnace body to blow oxygen-enriched gas into a matte layer in the furnace cavity;
the dragging ring is sleeved on the furnace body and rotatably supported on the bracket, the gear ring is sleeved on the furnace body, and the driving device is connected with the gear ring and is used for driving the furnace body to rotate by driving the gear ring to rotate.
2. An oxygen-enriched bottom-blowing converting furnace for converting copper into liquid copper matte according to claim 1, wherein the water-cooled oxygen lance flange is internally provided with an annular cavity formed around the oxygen lance hole, the rear end surface of the water-cooled oxygen lance flange is provided with a liquid inlet and a liquid outlet, cooling liquid is injected into the annular cavity through the liquid inlet, and the cooling liquid with the increased temperature is discharged from the liquid outlet.
3. An oxygen-enriched bottom-blowing converting furnace for converting copper from liquid copper matte according to claim 2, characterized in that the thickness of the water-cooled lance flange is 80 mm.
4. An oxygen-enriched bottom blowing converting furnace for converting copper into liquid copper matte according to claim 2, characterized in that the liquid inlet and the liquid outlet are symmetrically arranged at the upper and lower sides of the oxygen lance hole, and the liquid inlet and the liquid outlet are located on the same diagonal.
5. An oxygen-enriched bottom-blowing converting furnace for converting copper into liquid copper matte according to claim 4, characterized in that the liquid outlet and the liquid inlet are respectively connected with the circulating water tank of the furnace body through metal hoses, the cooling liquid adopts cooling water, and the heat transferred from the oxygen lance bricks is taken away through the circulating cooling water in the annular cavity.
6. An oxygen-enriched bottom-blowing converting furnace for converting copper from liquid copper matte according to claim 1, characterized in that the lance brick is made of refractory material.
7. An oxygen-enriched bottom-blowing converting furnace for converting copper into liquid copper matte according to claim 1, characterized in that the front end of the oxygen lance brick is of a convex structure and extends out of the furnace brick by about 1cm, the rear end of the oxygen lance brick is provided with a filler material after 1cm, and the oxygen lance opening of the oxygen lance extends out of the oxygen lance brick by about 1 cm.
8. An oxygen-enriched bottom-blowing converting furnace for converting copper into liquid copper matte according to claim 1, characterized in that an oxygen lance flange is further arranged at the bottom of the furnace body, and the water-cooling oxygen lance flange is fixed on the oxygen lance flange cover.
9. An oxygen-enriched bottom-blowing converting furnace for converting copper into liquid copper matte according to claim 1, characterized in that the vertical height of the lower edge of the oxygen lance mouth is 500mm from the bottom of the furnace body, and the oxygen lance mouth of the oxygen lance is positioned at the junction of the matte layer and the rough copper layer.
10. The oxygen-enriched bottom-blowing converting furnace for converting copper into liquid copper matte according to claim 1, wherein the copper outlet is arranged at the bottom of the end surface of the furnace body, the slag discharge port is arranged on the end surface of the furnace body opposite to the copper outlet, the slag discharge port is positioned at the center of the end surface of the furnace body, and the charging port and the smoke outlet are both positioned at the top of the furnace body.
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to an oxygen-enriched bottom blowing converting furnace for converting copper from liquid copper matte.
Background
Since 1968 the industrialization of oxygen bottom-blown converter steelmaking, the use of oxygen lances has a history of nearly 50 years, and the use of oxygen lances in nonferrous metallurgy has a history of 30 years, so far, the gas supply performance and the service life of the bottom-blown oxygen lances are critical problems at all. In the process of oxygen-enriched blowing of high-grade thermal materials, the service lives of the oxygen lance and the oxygen lance brick determine that the oxygen lance brick needs to be replaced regularly, the whole furnace life of the oxygen-enriched bottom blowing furnace is about 12 months, and the service life of the oxygen lance brick is only 3-6 months. Greatly influences the operation rate of the furnace and increases the smelting cost.
The oxygen lance, the oxygen lance brick and other accessory facilities are the key parts in the whole oxygen-enriched molten pool bottom-blowing furnace type, are the core technology of bottom-blowing copper smelting, and the maintenance quality of the bottom-blowing copper smelting furnace directly determines the cycle life of a furnace body. But the oxygen lance and the oxygen lance brick are also extremely easy to be damaged in the production process, so the problem of short service life of the oxygen lance and the oxygen lance brick is ubiquitous in the whole copper smelting industry.
The prior art in the protection process of the copper lance and the oxygen lance brick by the copper bottom blowing in the copper industry of the vessel:
1. high-temperature-resistant and wear-resistant steel is used as a lance body of the ventilating oxygen lance, and the structure of the lance body is adjusted to adjust the air supply effect.
2. The high-temperature scouring resistant salt leaching semi-brick is combined with the electric smelting magnesia-chrome brick.
3. The oxygen lance is added with cooling gas to achieve the cooling.
The prior art for changing the gun body structure has better effect in a bottom blowing smelting furnace for smelting bottom grade, but along with the rise of the subsequent copper smelting grade, the temperature slightly rises, and an oxygen lance brick is difficult to hang slag, so the erosion loss of copper liquid to the brick is also enhanced. The oxygen lance can also cool the oxygen lance by adding air, mushroom-shaped nubs for protecting the oxygen lance head are easily formed on the periphery of the oxygen lance in the bottom blowing copper smelting process, the nubs easily block the oxygen lance, air cannot be fed into a lance eye, the cooling effect is poor, and the protection of a lance brick is not facilitated.
Disclosure of Invention
Aiming at the technical problems, the invention provides the oxygen-enriched bottom blowing converting furnace for converting the liquid copper matte into the copper, and the heat transferred by the oxygen lance brick is taken away by adopting a circulating cooling water mode so as to achieve the effect of cooling the oxygen lance brick.
The technical scheme adopted by the invention is as follows:
an oxygen-enriched bottom blowing converting furnace for converting copper from liquid copper matte comprises a furnace body, an oxygen lance, a bracket, a drag ring, a gear ring and a driving device;
the furnace body is provided with a heating material port, a cooling material port, a copper outlet, a smoke outlet, a slag discharge port and an oxygen lance insertion hole formed in the bottom of the furnace body, wherein the furnace brick is arranged on the inner wall of the furnace body, a hearth is limited in the furnace brick, the bottom surface of the furnace body is flush, the furnace body is provided with the heating material port, the cooling material port, the copper outlet, the smoke outlet, the slag discharge port and the oxygen lance insertion hole, the oxygen lance brick is filled between the furnace brick and the oxygen lance insertion hole, the rear end of the oxygen lance brick is provided with;
wherein the oxygen lance sequentially penetrates through an oxygen lance hole on a flange plate of the water-cooling oxygen lance and an oxygen lance insertion hole at the bottom of the furnace body to blow oxygen-enriched gas into a matte layer in the furnace cavity;
the carrier ring is sleeved on the furnace body and rotatably supported on the bracket, the gear ring is sleeved on the furnace body, and the driving device is connected with the gear ring and used for driving the gear ring to rotate through driving the furnace body to rotate.
Preferably, the water-cooling oxygen lance flange plate is internally provided with an annular cavity formed around the oxygen lance hole, the rear end face of the water-cooling oxygen lance flange plate is provided with a liquid inlet and a liquid outlet, cooling liquid is injected into the annular cavity through the liquid inlet, and the cooling liquid with the raised temperature is discharged from the liquid outlet.
Preferably, the thickness of the water-cooling oxygen lance flange plate is 80 mm.
Preferably, the liquid inlet and the liquid outlet are symmetrically arranged at the upper side and the lower side of the oxygen gun hole, and the liquid inlet and the liquid outlet are positioned on the same diagonal line.
Preferably, the liquid outlet and the liquid inlet are respectively connected with a furnace body circulating water tank through metal hoses, cooling liquid of the cooling liquid adopts cooling water, and heat transferred by the oxygen lance brick is taken away through the circulating cooling water in the annular cavity.
Preferably, the oxygen lance brick is made of refractory materials.
Preferably, the front end of the oxygen lance brick is of a convex structure and extends out of the furnace brick by about 1cm, the rear end of the oxygen lance brick is provided with filler behind 1cm, and an oxygen lance port of the oxygen lance extends out of the oxygen lance brick by about 1 cm.
Preferably, the bottom of the furnace body is also provided with an oxygen lance flange, and the water-cooling oxygen lance flange is fixed in the oxygen lance flange cover.
Preferably, the vertical height of the lower edge of the end of the oxygen lance from the bottom of the furnace body is 500mm, and the oxygen lance port of the oxygen lance is positioned at the junction of the matte layer and the rough copper layer.
Preferably, the copper outlet is arranged at the bottom of the end face of the furnace body, the slag discharge port is arranged on the end face of the furnace body opposite to the copper outlet, the slag discharge port is positioned at the center of the end face of the furnace body, and the feed inlet and the smoke outlet are both positioned at the top of the furnace body.
Compared with the prior art, the invention has the beneficial effects that: the oxygen-enriched bottom-blowing converting furnace for converting copper into liquid copper matte provided by the invention protects the oxygen lance through the oxygen lance brick arranged between the oxygen lance jack and the furnace brick, and then the flange cover cooling sleeve is arranged on the outer side of the oxygen lance brick, so that heat transferred from the oxygen lance brick is taken away by adopting a circulating cooling water mode, the cooling effect on the oxygen lance brick is achieved, and the service life of the oxygen lance and the oxygen lance brick is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of an oxygen-enriched bottom blowing converting furnace for converting copper from liquid copper matte according to an embodiment of the present invention;
FIG. 2 is an enlarged view at A;
FIG. 3 is a front view of a water-cooled oxygen lance flange;
FIG. 4 is a schematic view in the direction B-B of FIG. 3;
fig. 5 is a side sectional view of fig. 2.
Wherein, 1-furnace body; 2-furnace brick; 3-oxygen lance brick; 4-oxygen lance; 5-water cooling the oxygen lance flange; 501-oxygen gun hole; 502-a liquid outlet; 503-liquid inlet; 6-oxygen lance flange; 601-pin holes; 7-a fastening pin; 8-a slag discharge port; 9-copper outlet; 10-a smoke outlet; 11-a cooling material port; 12-auxiliary combustion port; 13-a main burner port; 14-a tow ring; 15-a dragging seat; 16-a gear ring; 17-driving means.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention particularly discloses an oxygen-enriched bottom blowing converting furnace for converting copper into liquid copper matte, which comprises a furnace body 1 and an oxygen lance 4, as shown in figures 1, 2, 3 and 4.
Specifically, the inner wall of the furnace body 1 is provided with a furnace brick 2, a hearth is limited in the furnace brick 2, the bottom surface of the furnace body 1 is flush, a cooling material port 11, a heating material port, a copper outlet 9, a smoke outlet 10, a slag discharge port 8 and oxygen lance insertion holes formed in the bottom of the furnace body 1 are formed in the furnace body 1, oxygen lance bricks 3 are filled between the furnace brick 2 and the oxygen lance insertion holes, the rear ends of the oxygen lance bricks 3 are provided with water-cooling oxygen lance flange plates 5, and the water-cooling oxygen lance flange plates 5 are provided with
The oxygen lance 4 sequentially penetrates through an
According to the invention, the water-cooling oxygen lance flange 5 is arranged at the oxygen lance 4, the bottom blowing converting furnace needs to be rotated out of the furnace body for replacing the oxygen lance 4 at the interval time, the thickness of the oxygen lance brick 3 is measured, and the water-cooling oxygen lance flange 5 is arranged at the outer end of the oxygen lance brick 4 when the oxygen lance brick 4 is worn to a certain extent, so that the water-cooling oxygen lance flange 5 is fixed on the furnace body 1 through the oxygen lance flange cover 6, and the water-cooling oxygen lance flange can be easily taken down by detaching the oxygen lance flange cover 6.
When the water-cooling oxygen lance flange plate 5 is installed, the oxygen lance flange cover 6 is fixed on a furnace shell through welding, the pin holes 601 are welded on the oxygen lance flange cover, when the water-cooling oxygen lance flange plate 5 is installed, filler with the thickness of 1 centimeter is arranged at the rear end of the oxygen lance brick 3, then the water-cooling oxygen lance flange plate 5 is flatly placed in, and finally the fastening pins 7 are inserted into the pin holes 601 on the oxygen lance flange cover 6 to achieve the fixing effect. The oxygen lance brick 3 has small clearance, and the filler is arranged behind the oxygen lance brick, so that the sealing performance is very good, and the problem of melt leakage is avoided. And the oxygen lance brick 3 is convenient to be replaced discontinuously by fixing the fastening pin 7, so that the maintenance time is saved.
Referring to fig. 2 again, the end surfaces of the oxygen lances 4 and the oxygen lance bricks 3 are not flush with the furnace brick 2, the oxygen lance bricks 3 are about 1cm longer than the furnace brick 2 during installation, and the oxygen lances 4 are about 1cm longer than the oxygen lance bricks 3 during installation, mainly because the surrounding areas of the oxygen lances 4 are easy-to-burn parts during production and the whole set of oxygen lance bricks 3 need to be replaced when damaged to a certain extent. The oxygen lance 4 is easier to burn and damage than the oxygen lance brick 3, so that the installation method can not recess a large pit at the periphery of the oxygen lance 4 to influence the gas supply of the oxygen lance 4 even if the oxygen lance 4 and the oxygen lance brick 3 are burnt and damaged, is more favorable for protecting the oxygen lance 4 and the oxygen lance brick 3, and ensures that the oxygen lance 4 is stable and smooth in the gas supply process.
Referring to fig. 3 and 4 again, an annular cavity formed around an
Along with the rising of matte grade, the oxidation and reduction atmosphere in the furnace is enhanced, the temperature in the furnace rises, the temperature of an oxygen lance reaction zone can reach 1250-:
temperature condition of furnace body
The results show that: the water-cooling oxygen lance flange 5 can obviously reduce the temperature of the furnace body 1 around the oxygen lance 4 area, so as to protect the oxygen lance 4 and the oxygen lance bricks 3 around the oxygen lance 4, reduce the loss of the oxygen lance 4 and the oxygen lance bricks 3, prolong the replacement period, strengthen the production continuity and reduce the production cost.
The dredging period of the oxygen lance 4 is checked about once every two days on average, the oxygen lance brick 3 needs to be replaced when the burning loss exceeds 50mm, and compared with the previous burning loss data, the burning loss condition of the oxygen lance brick 3 is shown in the following table two: comparison of burning loss conditions of oxygen lance bricks before and after two flange cover cooling sleeves are arranged
The results show that: the damage condition of the oxygen lance brick 3 can be obviously reduced by arranging the water-cooling oxygen lance flange 5, so that the oxygen lance 4 and the oxygen lance bricks 3 around the oxygen lance 4 are protected, the loss of the oxygen lance 4 and the oxygen lance bricks 3 is reduced, the replacement period is prolonged, the production continuity is strengthened, and the production cost is reduced. If the oxygen lance brick 3 needs to be replaced, the water-cooling oxygen lance flange 5 is only needed to be taken down.
Referring to fig. 5, the vertical height from the lower edge of the oxygen lance port of the oxygen lance 4 to the bottom of the furnace body 1 is 500mm, and in the production process, the injection point of the oxygen lance is positioned on a matte layer to blow the matte. The oxygen lance adopts double channels, the inner channel is filled with mixed gas of oxygen and compressed air, the outer channel is filled with compressed air, and the pressure of the outer channel is higher than that of the inner channel. When the blister copper in the furnace reaches 500mm, the blister copper is just positioned at the lower edge of the oxygen lance opening and is ready to be discharged through the copper outlet, because the oxygen lance 4 blows matte, the blister copper below is positioned in a deposition area and the stirring is small, so the quality of the blister copper is high. The air oxygen of the oxygen lance can be directly sent to the reaction zone, the slagging process is fast, slag can be discharged in time, and the furnace blowing accident caused by over-blowing of slag is reduced. Secondly, because the matte layer is a reaction zone, the temperature is maintained to be higher (1200 ℃), the temperature change fluctuation is small, and the loss to the oxygen lance 4 is small. The planned converter is prolonged from 2 days to 5-7 days, the loss of the oxygen lances 4 is reduced from 13 lances to 6-8 lances per month, and each lance can be used for multiple times after maintenance. The lance brick 3 has been replaced once for up to 26 days.
Referring again to fig. 1, the converting furnace of the present invention further comprises a bracket 15, a drag ring 14, a ring gear 16 and a driving means 17. Wherein, the towing ring 14 is sleeved on the furnace body 1 and rotatably supported on the bracket 15, the gear ring 16 is sleeved on the outer surface of the furnace body 1, and the driving device 17 is connected with the gear ring 16 and is used for driving the furnace body 1 to rotate by driving the gear ring 17 to rotate. The driving device 17 comprises a motor and a speed reducer, the motor drives the speed reducer, a driving shaft and a gear ring of the speed reducer, the motor drives the driving shaft of the speed reducer, the driving shaft drives the gear ring 16 connected with the driving shaft, the furnace body 1 is driven by the gear ring 16 to rotate on the bracket 15, and the furnace body 1 can rotate, so that the oxygen lance can be conveniently replaced and other operations are facilitated.
Further, go out copper mouth 9 and set up in the terminal surface bottom of furnace body 1, arrange slag notch 8 and set up on the terminal surface of furnace body 1 relative with copper mouth 9, just arrange slag notch 8 and be located the terminal surface central point department of putting of furnace body, add cold material mouth, add the heat material mouth and all be located the top of furnace body 1 with the outlet flue, add cold material mouth 11 and add the heat material mouth and set up respectively in the both ends on furnace body 1 upper portion, and add the heat material mouth and set up in outlet flue 10 department.
Furthermore, an auxiliary burner port 12 and a main burner port 13 are respectively arranged on the opposite end surfaces of the furnace body 1, and when the furnace is overhauled, natural gas is introduced to burn and release heat to perform heat preservation or heating on the melt.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
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