CN215328314U - System for tin-containing material is smelted - Google Patents
System for tin-containing material is smelted Download PDFInfo
- Publication number
- CN215328314U CN215328314U CN202121624449.7U CN202121624449U CN215328314U CN 215328314 U CN215328314 U CN 215328314U CN 202121624449 U CN202121624449 U CN 202121624449U CN 215328314 U CN215328314 U CN 215328314U
- Authority
- CN
- China
- Prior art keywords
- furnace
- tin
- bin
- fuming
- smelting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The utility model discloses a tin-containing material smelting system which comprises a pretreatment mechanism, a screening mechanism, a feeding mechanism, a smelting mechanism, a slag treatment mechanism and a tail gas treatment mechanism. The utility model can sieve the dry tin-containing materials, so that the tin-containing materials with larger granularity can be directly conveyed into a top-blown furnace molten pool through a belt for smelting, and the tin-containing materials with smaller granularity are sprayed into the molten pool through a top-blown spray gun, thus reducing the splashing or leakage loss of the tin-containing materials with smaller granularity in the transfer process, and avoiding the mechanical inclusion or flying loss caused by putting the top of the belt furnace into the top-blown furnace; and the moisture is prevented from being added into the fine dry materials before the fine dry materials enter the furnace, so that the smelting energy consumption and the smelting smoke gas amount are reduced, and the more green, environment-friendly and energy-saving smelting is realized.
Description
Technical Field
The utility model relates to the technical field of crude tin smelting by a tin concentrate pyrogenic process, in particular to a system for smelting a tin-containing material.
Background
At present, in the production process of smelting crude tin from tin-containing materials, all the tin-containing materials are conveyed to the top of a furnace through a belt and then are put into a smelting furnace for reduction smelting to produce crude tin. In addition, the tin-containing material with low moisture and fine granularity also needs to be added with water for granulation, so that the moisture content in the mixture material fed into the furnace reaches 10-12%. The increase of the moisture content not only occupies the smelting productivity and increases the smelting energy consumption, but also increases the processing capacity and the processing cost of a flue gas processing system because moisture in the mixed material is vaporized after high temperature and generates a large amount of high-temperature steam which enters a subsequent process flue gas processing system.
Meanwhile, because the components and properties of various tin-containing materials are complex, pretreatment before smelting such as desulfurization and dearsenification is generally required, and various tin-containing fine particle dry materials are produced, such as tin-containing fine particle dry materials produced by roasting in a fluidized bed furnace, high-tin-containing smoke dust produced in a fuming furnace, high-tin-containing smoke dust produced in other smelting furnaces and the like. Various tin-containing fine dry materials need to be transported into a batching ore bin through a pneumatic pipeline or a special vehicle for batching in front of the furnace, and then are transported into a smelting furnace through a belt for smelting. Wherein, the loss such as splashing, material leakage and the like is easy to occur in the process of transporting various dry materials containing tin fine particles. In addition, during the process that tin-containing fine dry materials with fine granularity are conveyed into the smelting furnace through the belt, the falling distance in the smelting furnace exceeds 10 meters, the tin-containing fine dry materials are easily pumped into a tail gas dust collector along with hearth smoke, then the tin-containing fine dry materials are returned into a batching ore bin from the dust collector to enter the next batching and charging process, and the tin-containing fine dry materials are repeatedly transported in the process, so that the loss of the materials is further accelerated, the comprehensive recovery rate of tin smelting is low, and meanwhile, the situations of poor field environmental sanitation, damage to the bodies of operators and the like are caused.
Therefore, aiming at the phenomena of increased smelting energy consumption, increased load of a tail gas treatment system, metal loss caused by repeated transportation, poor sanitary environment, low comprehensive recovery rate of tin smelting and the like caused by smoke dust flying and the like in the smelting production process of the tin-containing fine particle dry materials, the novel tin-containing material smelting system is provided, and the problems to be solved by the technical personnel in the field are urgently needed.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model provides a tin-containing material smelting system, which can obviously improve the tin smelting production environment, improve the recovery rate of tin-containing fine dry materials, and achieve the effects of environmental protection and energy conservation.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a tin-containing material smelting system which comprises a pretreatment mechanism, a screening mechanism, a feeding mechanism, a smelting mechanism, a slag treatment mechanism and a tail gas treatment mechanism, wherein the pretreatment mechanism is used for carrying out pretreatment on tin-containing materials;
the screening mechanism comprises a screening machine, a fine material bin and a coarse material bin;
the upstream of the screening machine is connected with the downstream of the pretreatment mechanism, an oversize material outlet of the screening machine is connected with the coarse material bin, an undersize material outlet of the screening machine is connected with the fine material bin, and the coarse material bin and the fine material bin are respectively connected with the smelting mechanism through the feeding mechanism;
the feeding mechanism comprises a feeding device, a proportioning bin, a first stokehole bin, a second stokehole bin, a spray gun and a pulverized coal bin; the coarse material bin is communicated with the proportioning bin through the feeding device, and the proportioning bin is communicated with the smelting mechanism through the feeding device; the upstream of the first stokehole bin is communicated with the fine material bin, and the downstream of the first stokehole bin is communicated with the smelting mechanism through the spray gun; meanwhile, the upstream of the second stokehole bin is respectively communicated with the slag treatment mechanism and the tail gas treatment mechanism, and the downstream is communicated with the smelting mechanism through the spray gun; and the pulverized coal bin is communicated with the smelting mechanism through the spray gun.
Further preferably, loading attachment includes special skip and belt, the coarse material storehouse passes through special skip with the proportioning bins intercommunication, the proportioning bins passes through the belt intercommunication smelting mechanism.
The beneficial effects of the preferred technical scheme are as follows: the utility model screens tin-containing dry materials, so that the tin-containing materials with larger granularity can be directly conveyed into a top-blown furnace molten pool through a belt for smelting, and the tin-containing materials with finer granularity are sprayed into the molten pool through a top-blown spray gun, thus reducing the splashing or leakage loss of the tin-containing materials with finer granularity in the transfer process, and avoiding the mechanical inclusion or flying loss caused by throwing the top of the belt into the top-blown furnace. And the moisture is prevented from being added into the fine dry materials before the fine dry materials enter the furnace, so that the smelting energy consumption and the smelting smoke gas amount are reduced, and the more green, environment-friendly and energy-saving smelting is realized.
Preferably, the pretreatment mechanism comprises a fluidized bed furnace, a cooler and a fluidized bed furnace scraper machine;
the cooler is connected with the downstream of the fluidized bed furnace;
the downstream of the cooler is connected with the fluidized bed furnace scraper conveyor;
the downstream of the fluidized bed furnace scraper conveyor is connected with the sieving machine.
Wherein the cooler is used for cooling the intermediate material containing tin roasted in the fluidized bed furnace
The beneficial effects of the preferred technical scheme are as follows: the utility model can process the high-sulfur arsenic-containing tin ore fluidized bed furnace separately by classification through the pretreatment mechanism, provides low-sulfur low-arsenic tin-containing materials for the top-blown furnace, simultaneously conveys the materials roasted by the fluidized bed furnace to the top-blown furnace through pneumatic conveying for smelting, conveys the materials through closed pneumatic conveying, can reduce the flying or splashing loss of the materials in the process of conveying and transporting the materials through a belt, creates favorable conditions for realizing powder injection of the top-blown furnace, and is also favorable for improving the smelting recovery rate of the tin materials.
Preferably, the feeding mechanism further comprises a first pneumatic pipeline, a first discharging pipe, a second pneumatic pipeline, a second discharging pipe, a mixing air pipe and a metal hose;
the first pneumatic pipeline is connected with the fine material bin and the first stokehole bin, and the first stokehole bin is connected with the mixing air pipe through the first discharging pipe;
the upstream of the second pneumatic pipeline is respectively connected with the slag processing mechanism and the tail gas processing mechanism, the downstream of the second pneumatic pipeline is connected with the second stokehole bin, and the second stokehole bin is connected with the mixing air pipe through the second blanking pipe;
the mixing air pipe is 70-75 degrees with the first blanking pipe and the second blanking pipe respectively, and the mixing air pipe is connected with the spray gun through the metal hose.
The beneficial effects of the preferred technical scheme are as follows: the mixing air pipe, the first discharging pipe and the second discharging pipe are designed according to an optimal oblique angle, so that the powder is fully mixed, and the discharging is smooth and free from blockage.
Preferably, the smelting mechanism comprises a top blowing furnace, a furnace top sample rod, a coarse tin opening, a tin-transferring ladle and a slag opening;
the top of the top-blown converter is connected with one end of the belt and is simultaneously connected with the tail gas treatment mechanism; the spray gun penetrates through the top surface of the top-blown furnace and extends into the top-blown furnace, and meanwhile, the furnace top sample rod penetrates through the top surface of the top-blown furnace and extends into the top-blown furnace; the bottom of the top-blown converter is connected with the tin-transferring ladle through the thick tin port, and meanwhile, the bottom of the top-blown converter is connected with the slag processing mechanism through the slag port.
The beneficial effects of the preferred technical scheme are as follows: the efficient smelting of the tin-containing materials is realized by utilizing the top-blown furnace to recover crude tin, and the produced top-blown furnace slag is sent to the next procedure for recovery treatment.
Preferably, the slag treatment mechanism comprises a slag chute, a fuming furnace waste heat boiler, a fuming furnace surface air cooler, a fuming furnace cloth bag dust collector, a fuming dust scraper machine and a fuming dust bin; the fuming furnace is connected with the slag port through the slag chute, the bottom of the fuming furnace is provided with a fuming furnace slag discharge port, and the top of the fuming furnace is connected with the fuming furnace waste heat boiler; the downstream of the fuming furnace waste heat boiler is connected with the surface cooler of the fuming furnace; the lower part of the fuming furnace is connected with the cloth bag dust collector of the fuming furnace; the upstream of the fuming dust scraper is respectively connected with the fuming furnace waste heat boiler, the fuming furnace surface air cooler and the fuming furnace bag dust collector, and the downstream of the fuming furnace dust collector is connected with the fuming dust bin; and the downstream of the fuming dust bin is connected with the second stokehole bin through the second pneumatic pipeline.
The beneficial effects of the preferred technical scheme are as follows: the full fuming recovery of the tin contained in the top-blown furnace slag is realized, and the loss of tin is avoided.
Preferably, the tail gas treatment mechanism comprises a flue, a top-blown furnace waste heat boiler, a temperature measuring device, a top-blown furnace electric dust collector, a top-blown furnace smoke scraper machine and a top-blown furnace smoke bin; one end of the flue is connected with the top of the top-blown converter, the other end of the flue is connected with the top-blown converter waste heat boiler, and the temperature measuring device is installed at one end of the flue, which is connected with the top of the top-blown converter; the downstream of the top-blown furnace waste heat boiler is connected with the top-blown furnace electric dust collector; the upper stream of the top-blowing furnace smoke dust scraper is respectively connected with the top-blowing furnace waste heat boiler and the top-blowing furnace electric dust collector, and the lower stream of the top-blowing furnace smoke dust scraper is connected with the top-blowing furnace smoke dust bin; and the lower stream of the top-blowing furnace smoke dust bin is connected with the second stokehole bin through the second pneumatic pipeline.
The beneficial effects of the preferred technical scheme are as follows: the tin-containing tail gas in the flue gas of the top-blown converter is efficiently recycled, and the loss caused by the fact that the tin-containing tail gas enters a rear-end acid making system is reduced.
The utility model also provides a method for smelting the tin-containing material, which comprises the following steps of:
(1) classifying various tin ores to obtain low-sulfur-content arsenic-containing tin ores, conveying the low-sulfur-content arsenic-containing tin ores to a proportioning bin through a special skip, conveying the high-sulfur-content arsenic-containing tin ores to a fluidized bed furnace for pretreatment, and obtaining dry tin-containing materials; conveying the tin-containing dry materials to a screening machine for screening to obtain tin-containing fine dry materials, spraying the tin-containing fine dry materials into the top-blowing furnace through a spray gun to obtain tin-containing coarse dry materials, and conveying the tin-containing coarse dry materials to a proportioning bin through a special skip car;
(2) in the feeding period, the low-sulfur arsenic-containing tin ore, the tin-containing coarse grain dry material, quartz sand and limestone flux are proportioned in a proportioning bin and then are input into the top of a top-blown furnace through a belt, the tin-containing fine grain dry material amount and the recovered tin-containing material amount which are sprayed into the top-blown furnace through a spray gun are controlled according to the proportion, and a mixed melt is obtained after smelting in the top-blown furnace; then stopping feeding, and entering a reduction stage to obtain a crude tin product and top-blown furnace slag; meanwhile, the amount of coal briquettes fed by the belt and the amount of pulverized coal fed by the spray gun are adjusted according to the flue gas temperature measured by the temperature measuring device and the change of the tail gas CO concentration measured by the CO tail gas on-line monitor;
(3) stopping feeding the lump coal through the belt and feeding the pulverized coal through the spray gun after the reduction is finished, and lifting the spray gun above the liquid level of the mixed melt; then opening a coarse tin opening to input the coarse tin product into a tin-transferring steamed stuffed bun; after slag is discharged, blocking a coarse tin port, opening a slag port, and discharging the top-blown furnace slag to a fuming furnace for fuming treatment to obtain fuming dust; meanwhile, tail gas generated by smelting in the top-blown converter is treated to obtain recovered tail gas; the recovered tail gas and the fuming dust are respectively conveyed to a second stokehole bin through a second pneumatic pipeline to form the recovered tin-containing material;
(4) and (4) repeating the steps (2) to (3) after the top-blown converter slag is discharged.
The beneficial effects of the preferred technical scheme are as follows: the utility model discloses a method for smelting tin-containing materials, which classifies and screens tin-containing dry materials to obtain low-sulfur arsenic-containing tin ore and tin-containing coarse-grain dry materials which can be directly conveyed to a top-blown furnace through a special skip car and a belt for smelting. The tin-containing fine dry materials and the recovered tin-containing materials with smaller granularity are conveyed through a fully-closed pneumatic pipeline and sprayed into a molten pool of the top-blowing furnace through a spray gun, so that the fine materials with smaller granularity are splashed or lost due to material leakage in the process of transportation, and mechanical inclusion or flying loss caused by throwing the fine materials into the top-blowing furnace through a belt can be avoided.
Preferably, in the step (1), the low-sulfur arsenopyrite has Sn of more than 30 wt.%, Pb of 0.2 to 3.0 wt.%, S of less than 1.0 wt.%, As of less than 1.0 wt.%, Fe of 10 to 30 wt.%, and Bi of 0.1 to 0.2 wt.%; the high-sulfur arsenopyrite has Sn of more than 30 wt.%, Pb of 0.2-3.0 wt.%, S of 2.0 wt.%, As of 2.0 wt.%, Fe of 10-30 wt.% and Bi of 0.1-0.5 wt.%;
the pretreatment is roasting at 650-720 ℃ for 2-2.5h, the moisture of the tin-containing dry material is less than 1%, the Sn is more than 40 wt%, the Pb is 0.5-3.0 wt%, the S is less than 1.0 wt%, the As is less than 1.0 wt%, the Fe is 12-28 wt%, and the Bi is 0.05-0.20 wt%;
the screening is carried out by adopting a 5-mesh sieve, the granularity of the dry material containing the tin fine particles is 5-300 meshes, and the granularity of the dry material containing the tin coarse particles is<5 meshes and the bulk density of 2-3 g/cm3。
Preferably, in the step (2), Sn is 30-50 wt%, Pb is 0.2-3.0 wt%, and S is contained in the recovered tin-containing material<1.0wt.％、As<2.0 wt.%, 2-6 wt.% Fe, 0.1-0.3 wt.% Bi, and water<5.0%, a particle size of 100 to 300 mesh, and a bulk density of 0.5 to 1.0g/cm3；
The low-sulfur arsenic-containing tin ore, the tin-containing fine-particle dry material, the tin-containing coarse-particle dry material and the recovered tin-containing material are comprehensively calculated in a batching ore bin according to batching principles and fed into the furnace to be mixed, the addition amounts of the low-sulfur arsenic-containing tin ore and the tin-containing coarse-particle dry material which are input into the top-blowing furnace through a belt are accurately controlled through a DCS (distributed control system) feeding system of the batching bin, and the addition amounts of the tin-containing fine-particle dry material and the recovered tin-containing material which are input into the top-blowing furnace through a spray gun are controlled simultaneously;
the batching principle is as follows: 38-48 wt% of Sn, 1.0-5.0 wt% of Pb, less than 1.0 wt% of S, 0.1-0.2 wt% of Bi, 0.07-0.12 of As/Fe ratio, and quartz sand and limestone flux which are mixed according to the silicate degree K of 1.2-1.4 and the melting point of 1150-1320 ℃;
the low-sulfur arsenic-tin-containing ore, the tin-containing fine dry material, the tin-containing coarse dry material and the recovered tin-containing material are respectively 30-40 wt.%, 0-45 wt.%, 5-10 wt.% and 0-20 wt.% in terms of 100 wt.%;
in the smelting process: the back pressure of the spray gun is 20-30 kPa, the flue gas temperature is 400-500 ℃, the negative pressure of a hearth of the top-blown converter is-10-0 Pa, the oxygen-enriched concentration of the air of the spray gun is 37-39 wt.%, the concentration of tail gas CO is 0-500 ppm, the pulverized coal feeding amount of the spray gun is 5.0-5.5 t/h, and the coal feeding amount of the belt is 2.0-2.5 t/h;
in the reduction process, the back pressure of a spray gun is 30-40 kPa, the flue gas temperature is 500-550 ℃, the negative pressure of a hearth of a top-blown converter is-10-0 Pa, the oxygen-enriched concentration of air of the spray gun is 33-36 wt.%, the concentration of tail gas CO is 2000-5000 ppm, the pulverized coal feeding amount of the spray gun is 4.0-5.0 t/h, and the lump coal feeding amount of a belt is 4.0-5.0 t/h;
when the concentration of CO in the tail gas is more than 5000ppm, the reduction process is continuously increased to 20000ppm and is stopped.
Preferably, the low-sulfur arsenic-containing tin ore and the tin-containing coarse-grain dry material are firstly conveyed into a top-blown furnace through a belt, so that the depth of a molten pool in the furnace is more than or equal to 500mm, and then a spray gun is started to convey the tin-containing fine-grain dry material and the recovered tin-containing material into the top-blown furnace;
the feeding period is as follows: conveying the low-sulfur arsenic-containing tin ore and the tin-containing coarse-grain dry material through a belt, and stopping when the depth of a molten pool is 1500-1800 mm.
The beneficial effects of the preferred technical scheme are as follows: coarse dry materials are input into a top-blown furnace molten pool through a belt, after the depth of the molten pool reaches 500mm, a spray gun is started to spray the fine dry materials, the fine dry materials are input into the top-blown furnace, the situation that the fine dry materials fly up in the top-blown furnace and do not fall into the molten pool due to the fact that the depth of the molten pool is not enough to start the spray gun to spray the materials is avoided, and the situation that the improvement of smelting comprehensive recovery indexes is influenced is avoided.
Preferably, the depth of the molten pool is measured by inserting a roof-like rod into the molten pool.
The beneficial effects of the preferred technical scheme are as follows: the furnace top sample rod is inserted into the molten pool in real time to monitor the depth of the molten pool, and the control of smelting process parameters is ensured to be optimal.
Preferably, the fuming process in the step (3) is to add a vulcanizing agent into a fuming furnace to fuming and volatilize tin in the top-blown furnace slag; adding the vulcanizing agent according to the S/(Sn + Cu) molar ratio of 1:3 and the surplus coefficient of 1.2-1.3, wherein the vulcanizing agent is added within 90-120 min till the tin content of the high-temperature melt in the fuming furnace is less than or equal to 0.3 wt%; when the sampling, testing and analyzing result shows that the tin content of the high-temperature melt in the fuming furnace is more than 0.3 wt.%, continuously adding the vulcanizing agent to volatilize tin until the tin content of the high-temperature melt is less than or equal to 0.3 wt.%.
According to the technical scheme, compared with the prior art, the utility model discloses and provides a tin-containing material smelting system and method, and the tin-containing material smelting system and method have the following beneficial effects:
(1) the utility model classifies the dry tin-containing materials, the tin-containing materials with fine granularity are conveyed through a totally-enclosed pneumatic pipeline and then are directly sprayed into the molten pool through the spray gun, thus reducing the splashing or material leakage loss caused by the backward transportation in the flow, and avoiding the mechanical inclusion or flying loss caused by putting a belt into a top-blown furnace;
(2) the tin-containing material with dry moisture and fine granularity is directly sprayed into a molten pool through a spray gun, so that the water adding and granulating process can be omitted, the introduction of a large amount of moisture in the smelting process is avoided, the occupation of the smelting production capacity by redundant moisture is avoided, and the smelting energy consumption is reduced; meanwhile, the introduced water is prevented from being changed into high-temperature steam to enter a subsequent process flue gas treatment system, so that the treatment capacity and the treatment cost of the flue gas treatment system are reduced.
(3) The tin-containing material with larger granularity and the tin-containing material with smaller granularity are respectively conveyed into the furnace from a belt at the top of the top-blowing furnace and then enter the furnace from a spray gun of the top-blowing furnace, so that the adaptability of the top-blowing furnace to process complex materials is fully exerted, and the green and environment-friendly smelting production is realized;
(4) the tin-containing material with fine granularity is conveyed by a totally-enclosed pneumatic pipeline and sprayed into a molten pool by a spray gun for reduction smelting, water is not required for granulation, so that the transportation loss of the material is low, the material is conveyed smoothly, the occupational health of an operation site is good, the operation is simple and convenient, the recovery rate of crude tin smelting is high, the energy consumption of water granulation of the dust material with fine granularity containing tin by adding water is reduced, the smoke dust rate of a top-blowing furnace is reduced, and the economic index and the production benefit of the tin smelting technology are further improved;
(5) the moisture in the smelting flue gas brought by adding water for granulation is avoided, so that the moisture content of the flue gas is reduced by 10 wt.%, the granulation energy consumption is reduced, the granulation energy consumption accounts for 5% of the comprehensive smelting energy consumption, the smoke dust rate of the top-blown converter is reduced by 5%, and the economic index of the tin smelting technology is improved by 2-3%.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram provided in embodiment 1 of the present invention.
In the figure: 1 is a top-blown furnace, 2 is a belt, 3 is a flue, 4 is a temperature measuring device, 5 is a furnace top sample rod, 6 is a spray gun, 7 is a metal hose, 8 is a second stokehole bin, 9 is a first stokehole bin, 10 is a pulverized coal bin, 11 is a mixing air pipe, 12 is a fluidized bed furnace, 13 is a cooler, 14 is a fluidized bed furnace scraper machine, 15 is a sieving machine, 16 is a fine material bin, 17 is a coarse material bin, 18 is a special skip, 19 is a first pneumatic pipeline, 20 is a coarse tin opening, 21 is a tin-turning ladle, 22 is a slag opening, 23 is a slag chute, 24 is a fuming furnace waste heat boiler, 25 is a top-blown furnace electric dust collector, 26 is a top-blown furnace smoke dust scraper machine, 27 is a top-blown furnace smoke bin, 28 is a fuming furnace, 30 is a fuming furnace surface cooler, 31 is a smoke distribution bag dust collector, 32 is a fuming dust scraper machine, 33 is a fuming furnace smoke distribution dust bin, 34 is a pneumatic slag discharge opening, 35 is a second lower discharge pipe, 36 is a second lower discharge pipe, and a lower discharge pipe, A second feeding pipe 37 and a batching bin 38.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example 1
The embodiment of the utility model discloses a tin-containing material smelting system which comprises a pretreatment mechanism, a screening mechanism, a feeding mechanism, a smelting mechanism, a slag treatment mechanism and a tail gas treatment mechanism, wherein the pretreatment mechanism is used for carrying out pretreatment on a tin-containing material;
the downstream of the pretreatment mechanism is connected with a screening mechanism;
the screening mechanism comprises a screening machine, a fine material bin and a coarse material bin, the upstream of the screening machine is connected with the downstream of the pretreatment mechanism, an oversize material outlet of the screening machine is connected with the coarse material bin, an undersize material outlet of the screening machine is connected with the fine material bin, and the coarse material bin and the fine material bin are connected with the smelting mechanism through a feeding mechanism;
the feeding mechanism comprises a feeding device, a proportioning bin, a first stokehole bin, a second stokehole bin, a spray gun and a pulverized coal bin; wherein the feeding device comprises a special skip car and a belt
The coarse material bin is communicated with a batching bin through a special skip car, and the batching bin is communicated with the smelting mechanism through a belt; the upstream of the first stokehole bin is communicated with the fine material bin, and the downstream is communicated with the smelting mechanism through a spray gun; meanwhile, the upstream of the second stokehole bin is respectively communicated with the slag treatment mechanism and the tail gas treatment mechanism, and the downstream is communicated with the smelting mechanism through a spray gun; and the pulverized coal bin is communicated with the smelting mechanism through a spray gun.
The pretreatment mechanism comprises a fluidized bed furnace, a cooler and a fluidized bed furnace scraper conveyor; a cooler is connected with the downstream of the fluidized bed furnace; the downstream of the cooler is connected with a fluidized bed furnace scraper conveyor; the downstream of the fluidized bed furnace scraper conveyor is connected with a sieving machine.
The feeding mechanism also comprises a first pneumatic pipeline, a first discharging pipe, a second pneumatic pipeline, a second discharging pipe, a mixing air pipe and a metal hose; the first pneumatic pipeline is connected with the fine material bin and the first stokehole bin, and the first stokehole bin is connected with the mixing air pipe through a first discharging pipe; the upstream of the second pneumatic pipeline is respectively connected with the slag treatment mechanism and the tail gas treatment mechanism, the downstream of the second pneumatic pipeline is connected with a second stokehole bin, and the second stokehole bin is connected with a mixing air pipe through a second blanking pipe; the mixing air pipe is 75 degrees with first unloading pipe and second unloading pipe respectively, and the mixing air pipe passes through metal collapsible tube and is connected with the spray gun.
The smelting mechanism comprises a top blowing furnace, a furnace top sample rod, a crude tin port, a tin-transferring ladle and a slag port; the top of the top-blown converter is connected with a belt and a tail gas treatment mechanism; the spray gun penetrates through the top surface of the top-blown furnace and extends into the top-blown furnace, and the furnace top sample rod penetrates through the top surface of the top-blown furnace and extends into the top-blown furnace; the bottom of the top-blowing furnace is connected with the tin-transferring ladle through a thick tin port, and the bottom of the top-blowing furnace is connected with a slag processing mechanism through a slag port.
The slag treatment mechanism comprises a slag chute, a fuming furnace waste heat boiler, a fuming furnace surface air cooler, a fuming furnace cloth bag dust collector, a fuming dust scraper conveyor and a fuming dust bin; the fuming furnace is connected with a slag port through a slag chute, the bottom of the fuming furnace is provided with a fuming furnace slag discharge port, and the top of the fuming furnace is connected with a fuming furnace waste heat boiler; the downstream of the fuming furnace waste heat boiler is connected with a fuming furnace surface air cooler; the lower part of the fuming furnace is connected with a fuming furnace cloth bag dust collector; the upper stream of the fuming dust scraper is respectively connected with a firework road preheating pot, a fuming furnace surface cooler and a fuming furnace cloth bag dust collector, and the lower stream of the fuming dust scraper is connected with a fuming dust bin; the downstream of the fuming dust bin is connected with a second stokehold bin through a second pneumatic pipeline.
The tail gas treatment mechanism comprises a flue, a top-blown furnace waste heat boiler, a temperature measuring device, a top-blown furnace electric dust collector, a top-blown furnace smoke scraper conveyor and a top-blown furnace smoke bin; one end of the flue is connected with the top of the top-blown converter, the other end of the flue is connected with the waste heat boiler of the top-blown converter, and a temperature measuring device is arranged at one end of the flue, which is connected with the top of the top-blown converter; the lower stream of the top-blown furnace waste heat boiler is connected with a top-blown furnace electric dust collector; the upper stream of the top-blown furnace smoke dust scraper is respectively connected with a top-blown furnace waste heat boiler and a top-blown furnace electric dust collector, and the lower stream of the top-blown furnace smoke dust scraper is connected with a top-blown furnace smoke dust bin; the lower stream of the top-blown furnace smoke dust bin is connected with a second stokehole bin through a second pneumatic pipeline.
Example 2
The embodiment 2 of the utility model discloses a method for smelting tin-containing materials, which utilizes the system disclosed in the embodiment 1 and specifically comprises the following steps:
(1) classifying various tin ores to obtain low-sulfur-content arsenic-containing tin ores, conveying the low-sulfur-content arsenic-containing tin ores to a proportioning bin through a special skip, conveying the high-sulfur-content arsenic-containing tin ores to a fluidized bed furnace for pretreatment, and obtaining dry tin-containing materials; conveying the tin-containing dry materials to a screening machine for screening to obtain tin-containing fine dry materials, spraying the tin-containing fine dry materials into the top-blowing furnace through a spray gun to obtain tin-containing coarse dry materials, and conveying the tin-containing coarse dry materials to a proportioning bin through a special skip car;
wherein, Sn is 30 wt%, Pb is 0.2 to 3.0 wt%, S is 1.0 wt%, As is 1.0 wt%, Fe is 10 to 30 wt%, and Bi is 0.1 to 0.2 wt%; the high-sulfur arsenopyrite has Sn of more than 30 wt%, Pb of 0.2-3.0 wt%, S of more than 2.0 wt%, As of more than 2.0 wt%, Fe of 10-30 wt% and Bi of 0.1-0.5 wt%;
the pretreatment is carried out for 2-2.5h at 650-720 ℃, the moisture of the tin-containing dry material is less than 1%, the Sn is more than 40 wt%, the Pb is 0.5-3.0 wt%, the S is less than 1.0 wt%, the As is less than 1.0 wt%, the Fe is 12-28 wt%, and the Bi is 0.05-0.20 wt%;
screening by adopting a 5-mesh sieve, wherein the granularity of the dry tin-containing fine material is 5-300 meshes, and the granularity of the dry tin-containing coarse material<5 meshes and the bulk density of 2-3 g/cm3
(2) In the feeding period, the low-sulfur arsenic-containing tin ore, the tin-containing coarse grain dry material, quartz sand and limestone flux are proportioned in a proportioning bin and then are input into the top of a top-blown furnace through a belt, the tin-containing fine grain dry material amount and the recovered tin-containing material amount which are sprayed into the top-blown furnace through a spray gun are controlled according to the proportion, and a mixed melt is obtained after smelting in the top-blown furnace; then stopping feeding, and entering a reduction stage to obtain a crude tin product and top-blown furnace slag; meanwhile, the amount of coal briquettes fed by the belt and the amount of pulverized coal fed by the spray gun are adjusted according to the flue gas temperature measured by the temperature measuring device and the change of the tail gas CO concentration measured by the CO tail gas on-line monitor;
wherein, Sn is 30-50 wt.%, Pb is 0.2-3.0 wt.%, and S in the recovered tin-containing material<1.0wt.％、As<2.0 wt.%, 2-6 wt.% Fe, 0.1-0.3 wt.% Bi, and water<5.0%, a particle size of 100 to 300 mesh, and a bulk density of 0.5 to 1.0g/cm3；
The low-sulfur arsenic-containing tin ore, the tin-containing fine-particle dry material, the tin-containing coarse-particle dry material and the recovered tin-containing material are comprehensively calculated in a batching ore bin according to batching principles and fed into the furnace to be mixed, the addition amounts of the low-sulfur arsenic-containing tin ore and the tin-containing coarse-particle dry material which are input into the top-blowing furnace through a belt are accurately controlled through a DCS (distributed control system) feeding system of the batching bin, and the addition amounts of the tin-containing fine-particle dry material and the recovered tin-containing material which are input into the top-blowing furnace through a spray gun are controlled simultaneously;
the batching principle is as follows: 38-48 wt% of Sn, 1.0-5.0 wt% of Pb, less than 1.0 wt% of S, 0.1-0.2 wt% of Bi, 0.07-0.12 of As/Fe ratio, and quartz sand and limestone flux which are mixed according to the silicate degree K of 1.2-1.4 and the melting point of 1150-1320 ℃;
the method comprises the following steps of (1) respectively accounting for 100 wt.% of low-sulfur arsenic-tin-containing ore, tin-containing fine particle dry materials, tin-containing coarse particle dry materials and recovered tin-containing materials, wherein the contents of the materials are 30-40 wt.%, 0-45 wt.%, 5-10 wt.% and 0-20 wt.%;
firstly, inputting tin-containing fine dry materials and recovered tin-containing materials into a top-blown furnace through a spray gun to enable the depth of a molten pool in the furnace to be more than or equal to 500mm, and then, starting to input low-sulfur arsenic-containing tin ores and tin-containing coarse dry materials into the top-blown furnace through a belt; the feeding period is as follows: conveying low-sulfur arsenic-containing tin ore and tin-containing coarse grain dry materials by a belt, and stopping when the depth of a molten pool is 1500-1800 mm; and the depth of the molten pool is measured by inserting a furnace top sample rod into the molten pool
In the smelting process: the back pressure of the spray gun is 20-30 kPa, the flue gas temperature is 400-500 ℃, the negative pressure of a hearth of the top-blown converter is-10-0 Pa, the oxygen-enriched concentration of the air of the spray gun is 37-39 wt.%, the concentration of tail gas CO is 0-500 ppm, the pulverized coal feeding amount of the spray gun is 5.0-5.5 t/h, and the coal feeding amount of the belt is 2.0-2.5 t/h;
in the reduction process, the back pressure of a spray gun is 30-40 kPa, the flue gas temperature is 500-550 ℃, the negative pressure of a hearth of a top-blown converter is-10-0 Pa, the oxygen-enriched concentration of air of the spray gun is 33-36 wt.%, the concentration of tail gas CO is 2000-5000 ppm, the pulverized coal feeding amount of the spray gun is 4.0-5.0 t/h, and the lump coal feeding amount of a belt is 4.0-5.0 t/h;
when the concentration of CO in the tail gas is more than 5000ppm, the reduction process is continuously increased to 20000ppm and is stopped.
(3) Stopping feeding the lump coal through the belt and feeding the pulverized coal through the spray gun after the reduction is finished, and lifting the spray gun above the liquid level of the mixed melt; then opening a coarse tin opening to input the coarse tin product into the tin-transferring steamed stuffed bun; after slag is discharged, blocking a coarse tin port, opening a slag port, and discharging the top-blown furnace slag to a fuming furnace for fuming treatment to obtain fuming dust; meanwhile, tail gas generated by smelting in the top-blown converter is treated to obtain recovered tail gas; the recovered tail gas and the fuming dust are respectively conveyed to a second stokehole bin through a second pneumatic pipeline to form a recovered tin-containing material;
wherein the fuming process is to add a vulcanizing agent into the fuming furnace to fuming and volatilize tin in the top-blown furnace slag; adding a vulcanizing agent according to the S/(Sn + Cu) molar ratio of 1:3 and the surplus coefficient of 1.2-1.3, wherein the vulcanizing agent is added within 90-120 min until the tin content of the high-temperature melt in the fuming furnace is less than or equal to 0.3 wt%; sampling, testing and analyzing to obtain that the tin content of the high-temperature melt in the fuming furnace is more than 0.3 wt.%, continuously adding the vulcanizing agent to volatilize tin until the tin content of the high-temperature melt is less than or equal to 0.3 wt.%;
(4) repeating the steps (2) to (3) after the slag discharge of the top-blown furnace is finished.
Example 3
The embodiment 3 of the utility model discloses a method for smelting tin-containing materials, which utilizes the system disclosed in the embodiment 1 and specifically comprises the following steps:
(1) firstly, classifying tin-containing materials: conveying low-sulfur arsenic-bearing tin ores with Sn of more than 30 wt.%, Pb of 0.2-3.0 wt.%, S of 1.0 wt.%, As of 1.0 wt.%, Fe of 10-30 wt.% and Bi of 0.1-0.2 wt.% to a proportioning bin by a special skip car; adding 30 wt% Sn, 0.2% Pb, 2.0% S, 2.0% As, 10% Fe and 0.1% Bi of high-sulfur arsenious tin ore into a fluidized bed furnace, roasting for 2-2.5 hours at 650-720 ℃, and desulfurizing and dearsenifying to produce tin-containing dry materials with 40% Sn, 0.5% Pb, 0.8% S, 0.80% As, 12% Fe, 0.05% Bi and less than 1% moisture; screening the tin-containing dry material by using a screening machine, wherein the material passing through a 5-mesh sieve is a tin-containing fine-particle dry material, and the material on the sieve is a tin-containing coarse-particle dry material;
wherein the dry material of the tin-containing fine particles has a particle size of 15 meshes, the dry material of the tin-containing coarse particles has a particle size of 4 meshes, and the bulk density is 2g/cm3The dry material containing tin fine particles is conveyed to a front storage bin of a first furnace through a first pneumatic pipeline for storage, the dry material containing tin coarse particles is conveyed to a proportioning bin through a special material vehicle, and is conveyed into a top-blowing furnace through a belt after being comprehensively proportioned by an ore bin.
(2) Comprehensively calculating the proportion of the low-sulfur arsenic-containing tin ore, the tin-containing fine-grain dry material, the tin-containing coarse-grain dry material and the recovered tin-containing material according to a batching principle, accurately controlling the adding amount of the low-sulfur arsenic-containing tin ore and the tin-containing coarse-grain dry material which are input into the top of a top-blown furnace through a belt in a batching ore bin through a DCS (distributed control system) of the batching bin, and simultaneously controlling the adding amount of the tin-containing fine-grain dry material and the recovered tin-containing material which are input into the top-blown furnace through a spray gun; the proportioning proportions of the low-sulfur arsenic-tin-containing ore, the tin-containing fine particle dry material, the tin-containing coarse particle dry material and the recovered tin-containing material are respectively 40 wt.%, 30 wt.%, 10 wt.% and 20 wt.%, and the raw materials are comprehensively calculated as the raw materials in the furnace: sn38 wt%, pb1.0 wt%, s1.0 wt%, the As/Fe ratio was controlled at 0.07, bi0.1wt%; the quartz sand and limestone flux are mixed according to the silicate degree K being 1.4 and the melting point being 1150 ℃.
Wherein, the low-sulfur arsenic-bearing tin ore comprises the following components: sn35 wt%, pb0.2wt.%, s1.0 wt.%, As <1.0 wt.%, Fe10 wt%, bi0.1wt.%.
The recovery of the tin-containing material is composed of fuming dust and recovery of tail gas, both of which are directAnd the mixture is conveyed to a second stokehole storage bin through a second pneumatic pipeline for storage. The granularity of the smoke dust is 100 meshes, and the bulk density is 0.5g/cm3And less than 5 wt.% of water, consisting of: sn-containing 45 wt.%, pb0.2 wt.%, s0.9 wt.%, as1.5 wt.%, Fe2 wt.%, bi0.1 wt.%; the granularity of the recovered tail gas is 150 meshes, and the bulk density is 0.6g/cm3And less than 5 wt.% of water, consisting of: sn38 wt%, pb1.0%, s0.75wt%, as1.8 wt%, Fe3 wt%, bi0.1wt%.
The dry material containing tin fine particles and the recovered material containing tin are connected with a common stokehole mixing air pipe through a metal hose and a spray gun, the air pressure of the mixing air pipe is lower than 5-10% of the air pressure of each stokehole bin discharging pipe, and each stokehole bin discharging pipe and the mixing air pipe are connected at a tangent included angle of 70-75 degrees.
Controlling the time for smelting tin-containing fine dry materials and recovered tin-containing materials into a molten pool through a top-blowing furnace spray gun, starting the furnace when the depth of the molten pool in the top-blowing furnace reaches 500mm, stopping feeding after a complete feeding period is finished, and adjusting the feeding amount of low-sulfur arsenic-containing tin ore and tin-containing coarse dry materials conveyed by a belt at the top of the furnace; the depth of the molten pool is detected by inserting a top sample rod of the top-blown furnace into the molten pool.
Wherein the feeding period is that the feeding belt at the top of the top-blown furnace starts feeding until the height of a molten pool reaches 1500mm, the smelting process is completed within the feeding period time, and then the reduction stage of smelting the high-temperature mixed melt is started.
Controlling the smelting process, controlling the back pressure of a spray gun at 20-30 kPa, controlling the temperature measurement of the top-blown furnace flue gas at 420 ℃, controlling the negative pressure of a hearth at-10-0 Pa, controlling the oxygen enrichment concentration of spray gun air at 37-39 wt.%, controlling the CO concentration of tail gas at 0-500 ppm, controlling the spray gun to supply pulverized coal at 5.0-5.5 t/h, and controlling the belt to supply lump coal at 2.0-2.5 t/h.
The reduction process is controlled, the back pressure of a spray gun is controlled to be 30-40 kPa, the temperature measurement temperature of the top-blown furnace flue gas is controlled to be 500-550 ℃, the negative pressure of a hearth is-10-0 Pa, the oxygen enrichment concentration of spray gun air is 33-36 wt.%, the concentration of tail gas CO is 2000-5000 ppm, the pulverized coal is fed by the spray gun at a rate of 4.0-5.0 t/h, and the lump coal fed by the top-blown furnace through the belt is 4.0-5.0 t/h.
(3) When the concentration of the CO in the tail gas is continuously increased to 20000ppm from 5000ppm, stopping feeding lump coal through the skin and feeding pulverized coal through the spray gun after the reduction is finished, and lifting the spray gun above the liquid level of the mixed melt; then opening a coarse tin opening to input the coarse tin product into the tin-transferring steamed stuffed bun; after slag is discharged, blocking a coarse tin port, opening a slag port, and discharging the top-blown furnace slag to a fuming furnace for fuming treatment to obtain fuming dust; meanwhile, tail gas generated by smelting in the top-blown converter is treated to obtain recovered tail gas; the recovered tail gas and the fuming dust are respectively conveyed to a second stokehole bin through a second pneumatic pipeline to form a recovered tin-containing material;
wherein the fuming process is to add a vulcanizing agent into the fuming furnace to fuming and volatilize tin in the top-blown furnace slag; adding a vulcanizing agent according to the S/(Sn + Cu) molar ratio of 1:3 and the surplus coefficient of 1.2-1.3, wherein the vulcanizing agent is added within 90-120 min until the tin content of the high-temperature melt in the fuming furnace is less than or equal to 0.3 wt%; sampling, testing and analyzing to obtain that the tin content of the high-temperature melt in the fuming furnace is more than 0.3 wt.%, continuously adding the vulcanizing agent to volatilize tin until the tin content of the high-temperature melt is less than or equal to 0.3 wt.%;
(4) and (4) repeating the steps (2) to (3) after the top-blown converter slag is discharged.
Example 4
The embodiment 4 of the utility model discloses a method for smelting a tin-containing material, which utilizes the system disclosed in the embodiment 1 and specifically comprises the following steps:
(1) firstly, classifying tin-containing materials: conveying low-sulfur arsenic-bearing tin ores with Sn of more than 30 wt.%, Pb of 0.2-3.0 wt.%, S of 1.0 wt.%, As of 1.0 wt.%, Fe of 10-30 wt.% and Bi of 0.1-0.2 wt.% to a proportioning bin by a special skip car; carrying out desulfurization and dearsenification on high-sulfur arsenic-containing tin ores containing Sn35 wt%, Pb2.0 wt%, S3.0 wt%, As2.5 wt%, Fe15 wt% and Bi0.2 wt% in a fluidized bed furnace at the temperature of 650-720 ℃ for 2-2.5h to produce dry tin-containing materials containing Sn45 wt%, Pb1.5 wt%, S0.7 wt%, As0.5 wt%, Fe18 wt%, Bi0.08wt% and water less than 1%, sieving the dry tin-containing materials by using a sieving machine, wherein the dry tin-containing materials under a 5-mesh sieve are dry tin-containing fine particles, and the dry tin-containing materials on the sieving machine are dry tin-containing coarse particles.
Wherein the granularity of the dry material containing tin fine particles is 300 meshes, and the granularity of the dry material containing tin coarse particles is 300 meshesDegree of 4 meshes and bulk density of 2.5g/cm3The dry material containing tin fine particles is conveyed to a front storage bin of a first furnace through a first pneumatic pipeline for storage, the dry material containing tin coarse particles is conveyed to a batching ore bin through a special material vehicle, and is conveyed into a top-blowing furnace through a belt after being comprehensively batched through the ore bin.
(2) Comprehensively calculating the proportion of the low-sulfur arsenic-containing tin ore, the tin-containing fine-grain dry material, the tin-containing coarse-grain dry material and the recovered tin-containing material according to a batching principle, accurately controlling the adding amount of the low-sulfur arsenic-containing tin ore and the tin-containing coarse-grain dry material which are input into the top of a top-blown furnace through a belt in a batching ore bin through a DCS (distributed control system) of the batching bin, and simultaneously controlling the adding amount of the tin-containing fine-grain dry material and the recovered tin-containing material which are input into the top-blown furnace through a spray gun; the proportions of the low-sulfur arsenic-tin-containing ore, the tin-containing fine dry material, the tin-containing coarse dry material and the recovered tin-containing material are respectively 35 wt.%, 45 wt.%, 10 wt.% and 10 wt.%, and the proportions are calculated comprehensively in the furnace-entering mixed material: sn48 wt%, pb5.0 wt%, s0.9wt%, As/Fe ratio 0.12, bi0.2wt%; the quartz sand and limestone flux were mixed according to a silicate degree K of 1.2 and a melting point of 1320 ℃.
Wherein, the low-sulfur arsenic-bearing tin ore comprises the following components: sn50 wt%, pb3.0 wt.%, S <1.0 wt.%, as0.3 wt.%, Fe30 wt%, bi0.2wt.%.
The recovered tin-containing material is composed of fuming dust and recovered tail gas, and is directly conveyed to the second stokehole storage bin through a second pneumatic pipeline for storage. The granularity of the smoke dust is 200 meshes, and the bulk density is 0.8g/cm3Comprises the following components: sn45 wt%, pb0.3wt%, s0.50wt%, as1.2wt%, Fe3 wt%, bi0.12wt%. The granularity of the recovered tail gas is 300 meshes, and the bulk density is 1.0g/cm3The composition is as follows: sn42 wt%, Pb1.5 wt%, S0.5 wt%, As1.8 wt%, Fe6 wt%, Bi0.3 wt%, moisture less than 5 wt%.
The dry material containing tin fine particles and the recovered material containing tin are connected with a common stokehole mixing air pipe through a metal hose and a spray gun, the air pressure of the mixing air pipe is lower than 5-10% of the air pressure of each stokehole bin discharging pipe, and each stokehole bin discharging pipe and the mixing air pipe are connected at a tangent included angle of 70-75 degrees.
Controlling the time for smelting tin-containing fine dry materials and recovered tin-containing materials into a molten pool through a top-blowing furnace spray gun, starting the furnace when the depth of the molten pool in the top-blowing furnace reaches 500mm, stopping feeding after a complete feeding period is finished, and adjusting the feeding amount of low-sulfur arsenic-containing tin ore and tin-containing coarse dry materials conveyed by a belt at the top of the furnace; the depth of the molten pool is detected by inserting a top sample rod of the top-blown furnace into the molten pool.
Wherein the feeding period is that the feeding belt at the top of the top-blown furnace starts feeding until the height of a molten pool reaches 1500mm, the smelting process is completed within the feeding period time, and then the reduction stage of smelting the high-temperature mixed melt is started.
Controlling the smelting process of a molten pool containing tin materials, controlling the back pressure of a spray gun at 20-30 kPa, controlling the temperature measurement temperature of flue gas of a top-blowing furnace at 500 ℃, controlling the negative pressure of a hearth at-10-0 Pa, controlling the oxygen enrichment concentration of spray gun air at 37-39 wt.%, controlling the concentration of tail gas CO at 0-500 ppm, feeding pulverized coal by the spray gun at 5.0-5.5 t/h, and feeding lump coal by a top belt of the top-blowing furnace at 2.0-2.5 t/h.
Controlling the reduction process of the smelted high-temperature mixed melt, controlling the back pressure of a spray gun at 30-40 kPa, controlling the temperature measurement temperature of the flue gas of a top-blowing furnace at 500-550 ℃, controlling the negative pressure of a hearth at-10-0 Pa, controlling the oxygen enrichment concentration of spray gun air at 33-36 wt.%, controlling the CO concentration of tail gas at 2000-5000 ppm, feeding pulverized coal by the spray gun at 4.0-5.0 t/h, and feeding lump coal by a top belt of the top-blowing furnace at 4.0-5.0 t/h.
(3) When the concentration of the CO in the tail gas is continuously increased to 20000ppm from 5000ppm, stopping feeding lump coal through the skin and feeding pulverized coal through the spray gun after the reduction is finished, and lifting the spray gun above the liquid level of the mixed melt; then opening a coarse tin opening to input the coarse tin product into the tin-transferring steamed stuffed bun; after slag is discharged, blocking a coarse tin port, opening a slag port, and discharging the top-blown furnace slag to a fuming furnace for fuming treatment to obtain fuming dust; meanwhile, tail gas generated by smelting in the top-blown converter is treated to obtain recovered tail gas; the recovered tail gas and the fuming dust are respectively conveyed to a second stokehole bin through a second pneumatic pipeline to form a recovered tin-containing material;
wherein the fuming process is to add a vulcanizing agent into the fuming furnace to fuming and volatilize tin in the top-blown furnace slag; adding a vulcanizing agent according to the S/(Sn + Cu) molar ratio of 1:3 and the surplus coefficient of 1.2-1.3, wherein the vulcanizing agent is added within 90-120 min until the tin content of the high-temperature melt in the fuming furnace is less than or equal to 0.3 wt%; sampling, testing and analyzing to obtain that the tin content of the high-temperature melt in the fuming furnace is more than 0.3 wt.%, continuously adding the vulcanizing agent to volatilize tin until the tin content of the high-temperature melt is less than or equal to 0.3 wt.%;
(4) and (4) repeating the steps (2) to (3) after the top-blown converter slag is discharged.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A tin-containing material smelting system is characterized by comprising a pretreatment mechanism, a screening mechanism, a feeding mechanism, a smelting mechanism, a slag treatment mechanism and a tail gas treatment mechanism;
the screening mechanism comprises a screening machine, a fine material bin and a coarse material bin;
the upstream of the screening machine is connected with the downstream of the pretreatment mechanism, an oversize material outlet of the screening machine is connected with the coarse material bin, an undersize material outlet of the screening machine is connected with the fine material bin, and the coarse material bin and the fine material bin are respectively connected with the smelting mechanism through the feeding mechanism;
the feeding mechanism comprises a feeding device, a proportioning bin, a first stokehole bin, a second stokehole bin, a spray gun and a pulverized coal bin; the coarse material bin is communicated with the proportioning bin through the feeding device, and the proportioning bin is communicated with the smelting mechanism through the feeding device; the upstream of the first stokehole bin is communicated with the fine material bin, and the downstream of the first stokehole bin is communicated with the smelting mechanism through the spray gun; meanwhile, the upstream of the second stokehole bin is respectively communicated with the slag treatment mechanism and the tail gas treatment mechanism, and the downstream is communicated with the smelting mechanism through the spray gun; and the pulverized coal bin is communicated with the smelting mechanism through the spray gun.
2. The tin-containing material smelting system of claim 1, wherein the feeding device comprises a special skip car and a belt, the coarse material bin is communicated with the proportioning bin through the special skip car, and the proportioning bin is communicated with the smelting mechanism through the belt.
3. The tin-bearing material smelting system of claim 2, wherein the pretreatment mechanism comprises a fluidized bed furnace, a cooler and a fluidized bed furnace scraper;
the cooler is connected with the downstream of the fluidized bed furnace;
the downstream of the cooler is connected with the fluidized bed furnace scraper conveyor;
the downstream of the fluidized bed furnace scraper conveyor is connected with the sieving machine.
4. The tin-containing material smelting system of claim 3, wherein the feeding mechanism further comprises a first pneumatic pipeline, a first blanking pipe, a second pneumatic pipeline, a second blanking pipe, a mixing air pipe and a metal hose;
the first pneumatic pipeline is connected with the fine material bin and the first stokehole bin, and the first stokehole bin is connected with the mixing air pipe through the first discharging pipe;
the upstream of the second pneumatic pipeline is respectively connected with the slag processing mechanism and the tail gas processing mechanism, the downstream of the second pneumatic pipeline is connected with the second stokehole bin, and the second stokehole bin is connected with the mixing air pipe through the second blanking pipe;
the mixing air pipe is 70-75 degrees with the first blanking pipe and the second blanking pipe respectively, and the mixing air pipe is connected with the spray gun through the metal hose.
5. The tin-bearing material smelting system of claim 4, wherein the smelting mechanism comprises a top-blown furnace, a furnace top sample rod, a crude tin port, a tin-turning ladle and a slag port;
the top of the top-blown converter is communicated with one end of the belt and is connected with the tail gas treatment mechanism; the spray gun penetrates through the top surface of the top-blown furnace and extends into the top-blown furnace, and meanwhile, the furnace top sample rod penetrates through the top surface of the top-blown furnace and extends into the top-blown furnace; the bottom of the top-blown converter is connected with the tin-transferring ladle through the thick tin port, and meanwhile, the bottom of the top-blown converter is connected with the slag processing mechanism through the slag port.
6. The tin-bearing material smelting system of claim 5, wherein the slag handling mechanism comprises a slag chute, a fuming furnace waste heat boiler, a fuming furnace surface cooler, a fuming furnace bag dust collector, a fuming dust scraper, a fuming dust bin;
the fuming furnace is connected with the slag port through the slag chute, the bottom of the fuming furnace is provided with a fuming furnace slag discharge port, and the top of the fuming furnace is connected with the fuming furnace waste heat boiler;
the downstream of the fuming furnace waste heat boiler is connected with the surface cooler of the fuming furnace; the lower part of the fuming furnace is connected with the cloth bag dust collector of the fuming furnace;
the upstream of the fuming dust scraper is respectively connected with the fuming furnace waste heat boiler, the fuming furnace surface air cooler and the fuming furnace bag dust collector, and the downstream of the fuming furnace dust collector is connected with the fuming dust bin;
and the downstream of the fuming dust bin is connected with the second stokehole bin through the second pneumatic pipeline.
7. The tin-bearing material smelting system of claim 6, wherein the tail gas treatment mechanism comprises a flue, a top-blown furnace waste heat boiler, a temperature measuring device, a top-blown furnace electric dust collector, a top-blown furnace smoke scraper, a top-blown furnace smoke bin;
one end of the flue is connected with the top of the top-blown converter, the other end of the flue is connected with the top-blown converter waste heat boiler, and the temperature measuring device is installed at one end of the flue, which is connected with the top of the top-blown converter;
the downstream of the top-blown furnace waste heat boiler is connected with the top-blown furnace electric dust collector;
the upper stream of the top-blowing furnace smoke dust scraper is respectively connected with the top-blowing furnace waste heat boiler and the top-blowing furnace electric dust collector, and the lower stream of the top-blowing furnace smoke dust scraper is connected with the top-blowing furnace smoke dust bin;
and the lower stream of the top-blowing furnace smoke dust bin is connected with the second stokehole bin through the second pneumatic pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121624449.7U CN215328314U (en) | 2021-07-16 | 2021-07-16 | System for tin-containing material is smelted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121624449.7U CN215328314U (en) | 2021-07-16 | 2021-07-16 | System for tin-containing material is smelted |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215328314U true CN215328314U (en) | 2021-12-28 |
Family
ID=79567961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121624449.7U Withdrawn - After Issue CN215328314U (en) | 2021-07-16 | 2021-07-16 | System for tin-containing material is smelted |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215328314U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113481382A (en) * | 2021-07-16 | 2021-10-08 | 云南锡业股份有限公司锡业分公司 | System and method for smelting tin-containing material |
-
2021
- 2021-07-16 CN CN202121624449.7U patent/CN215328314U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113481382A (en) * | 2021-07-16 | 2021-10-08 | 云南锡业股份有限公司锡业分公司 | System and method for smelting tin-containing material |
| WO2023284292A1 (en) * | 2021-07-16 | 2023-01-19 | 云南锡业股份有限公司锡业分公司 | System and method for smelting tin-containing material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113481382B (en) | System and method for smelting tin-containing material | |
| CN101613800B (en) | Metallurgical composite pelletizing prepared through twice pelletizing method, as well as preparation method and application thereof | |
| CN101554632B (en) | Harmless regeneration recycling method of trash fly ash by using blast furnace | |
| CN111101001B (en) | One-step nickel smelting system and one-step nickel smelting method | |
| CN110241307B (en) | Method for preparing nickel matte by reducing nickel-containing material by two-stage method | |
| CN101624637A (en) | System and method for centralized classification treatment of steel metallurgic dust mud | |
| EP0657552A1 (en) | Method for recovering zinc from zinc containing dust | |
| CN215328314U (en) | System for tin-containing material is smelted | |
| CN105648233A (en) | Smelting reduction method for secondary lead | |
| CN105603197A (en) | Device and process for directly reducing smelt antimony from antimony slag and antimony ash | |
| CN104120207B (en) | One joins the raw ferriferous method in ore deposit with tin tail iron ore concentrate and the poor assorted ore deposit of high harmful element | |
| RU2555318C2 (en) | Method and device for production of moulded products | |
| CN108411126B (en) | Titanium slag smelting system and method based on pre-reduction | |
| KR20020083638A (en) | Recycling method of waste material by using of coal based iron making process | |
| CN204848305U (en) | Sulfate process titanium dioxide powder production equipment for acidolysis | |
| JP5103802B2 (en) | Method for treating wet dust and method for producing sintered ore | |
| SU1241999A3 (en) | Method of producing ferrochromium | |
| CN110184476B (en) | Method for eliminating accretions in electric settling furnace | |
| WO1994005817A1 (en) | Method for producing sintered ore | |
| CN216141595U (en) | Side type powder feeding top-blown furnace system | |
| EP4265758A1 (en) | System and method for smelting tin-containing material | |
| CN211570737U (en) | System for steelmaking secondary dust removal ash is dealt with to resourceization | |
| CN206635385U (en) | A kind of smelting system for improving antimony recovery | |
| CN110669921A (en) | System and method for resourcefully treating steelmaking secondary dedusting ash | |
| CN106801150B (en) | A kind of smelting system and method improving antimony recovery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20211228 Effective date of abandoning: 20230516 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20211228 Effective date of abandoning: 20230516 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |