CN212925076U - Fine mineral powder recycling system suitable for smelting reduction process - Google Patents
Fine mineral powder recycling system suitable for smelting reduction process Download PDFInfo
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- CN212925076U CN212925076U CN202021132134.6U CN202021132134U CN212925076U CN 212925076 U CN212925076 U CN 212925076U CN 202021132134 U CN202021132134 U CN 202021132134U CN 212925076 U CN212925076 U CN 212925076U
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Abstract
The utility model provides a fine powdered ore recycle system suitable for melting reduction technology, wherein the system is including the fine powdered ore collection device, fine powdered ore conveying system, fine powdered ore storehouse, the fine powdered ore feed system of jetting that connect gradually, and the preheating in fine powdered ore collection device and the melting reduction technology is reduced the headtotail in advance, fine powdered ore feed system of jetting is connected with the melting reduction furnace. The fine mineral powder in the smoke dust is collected in a preheating pre-reduction system of smelting reduction metallurgy through a fine mineral powder collecting device, and the collected fine mineral powder is directly conveyed to an SRV furnace for injection through a fine mineral powder conveying system, a fine mineral powder bin and a fine mineral powder feeding and injecting system. Therefore, the recycling of the fine mineral powder is realized, the recycling waste of the fine mineral powder is avoided, the ore spraying amount and the impact efficiency in the smelting reduction furnace are improved, and the reaction speed and the sufficiency in the furnace are improved.
Description
Technical Field
The utility model relates to a smelting reduction metallurgy technical field especially relates to a fine mineral powder recycle system suitable for smelting reduction process.
Background
The HIsmelt smelting reduction metallurgy process is one of smelting reduction metallurgy technologies which realize industrial production, is the only smelting reduction metallurgy new technology which does not use coke and sinter at present, and belongs to the leading-edge technology of the current metallurgy field. The HIsmelt reduction metallurgy process utilizes non-coking coal powder and iron ore powder to produce liquid pig iron by adopting a spray metallurgy mode, has the characteristics of short flow, energy conservation, environmental protection, good molten iron quality and the like, and is an advanced metallurgy technology for solving the problems of limited coking coal resources and environmental protection.
In the HIsmelt smelting reduction metallurgy process, the iron ore powder is preheated and pre-reduced before entering the SRV smelting reduction furnace, namely the iron ore powder is heated to more than 750 ℃, so that the iron content in the iron ore powder is increased. The smoke generated by the preheating pre-reduction system is firstly subjected to smoke dust collection treatment, and then the residual waste gas is subjected to the next treatment. Wherein the smoke dust collected by the preheating pre-reduction system contains a large amount of fine iron ore powder, and the particle size of the fine iron ore powder is less than 100 mu m.
At present, the fine iron ore powder collected by the preheating pre-reduction system is mainly recycled by returning to a raw material plant and mixing into the raw material for continuous use. However, after the part of fine iron ore powder is mixed into the raw material due to small particle size and enters the preheating pre-reduction system again, most of the fine iron ore powder cannot be utilized, and finally enters the flue gas again. This results in a cyclic process, resulting in more and more iron-containing dust being used inefficiently.
Therefore, there is an urgent need to develop a new fine ore powder recycling system to solve the above problems, and to overcome and ameliorate one or more of the above disadvantages of the prior art by using the newly designed fine ore powder recycling system, or to at least provide an effective alternative method to solve the above problems.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects, the embodiment of the utility model provides a fine ore powder recycling system suitable for a smelting reduction process. The application provides a fine mineral powder recycle system can adapt to the particularity of HIsmelt smelting reduction technology and realize that fine mineral powder retrieves and recycles, reduces the iron-containing dust in preheating the pre-reduction system, promotes the ore spraying volume of fine mineral powder, realizes the high-efficient utilization of material.
The utility model discloses a realize through following technical scheme:
the embodiment of the utility model provides a fine powdered ore recycle system suitable for smelting reduction technology, wherein, including fine powdered ore collection device, fine powdered ore conveying system, fine powdered ore storehouse, the fine powdered ore feed system of jetting that connects gradually, wherein, preheating in fine powdered ore collection device and the smelting reduction technology is reduced the headtotail, fine powdered ore feed system of jetting is connected with the smelting reduction furnace.
And collecting fine mineral powder in the smoke dust of the preheating pre-reduction system through a fine mineral powder collecting device, and directly conveying the collected fine mineral powder to the SRV furnace for injection through a fine mineral powder conveying system, a fine mineral powder bin and a fine mineral powder feeding and injecting system. Therefore, the fine mineral powder is recycled, the recycling waste of the fine mineral powder is avoided, the ore spraying amount in the SRV furnace is increased, and the reaction speed and the sufficiency in the furnace are improved.
In a preferred embodiment, the fine ore collecting device comprises a long bag high efficiency pulse bag dust collector and/or a cyclone gravity dust collector.
In a preferred implementation manner, the fine ore powder conveying system at least comprises one conveying subsystem, the conveying subsystem at least comprises two first blowing devices, inlets of the two first blowing devices are respectively connected with outlets of the fine ore powder collecting device, outlet pipelines of the two first blowing devices are combined to form a total pipeline which is connected with the inlets of the fine ore powder bins;
the two first blowing devices are alternately used, and when one first blowing device blows, the other first blowing device performs blowing preparation; wherein the blowing preparation includes at least one of exhausting, charging, and pressurizing.
The two first blowing devices are arranged in the fine ore powder conveying system and are alternately used, so that the fine ore powder can be continuously and quantitatively sprayed into the fine ore powder bin or the fine ore powder bin pump.
In a preferred embodiment, the fine ore fines conveying system comprises two of the conveying subsystems.
The two conveying subsystems are arranged, so that the fine mineral powder in the fine mineral powder collecting device can be effectively prevented from being accumulated, and the fine mineral powder at the bottom of the fine mineral powder collecting device can be discharged into the fine mineral powder conveying system for conveying.
In a preferred implementation manner, the fine ore powder feeding and injecting system at least comprises a feeding and injecting subsystem, an inlet of the feeding and injecting subsystem is connected with an outlet of the fine ore powder bin, an outlet of the feeding and injecting subsystem is provided with a fine ore powder injecting pipeline, the fine ore powder injecting pipeline and the coarse ore powder injecting pipeline are combined to form a total injecting pipeline, and the total injecting pipeline is connected with a spray gun arranged on the smelting reduction furnace;
the feeding and blowing subsystem at least comprises two second blowing devices which are used alternately, wherein when one second blowing device performs blowing, the other second blowing device performs blowing preparation; wherein the blowing preparation includes at least one of exhausting, charging, and pressurizing.
By arranging the fine mineral powder feeding and blowing system, fine mineral powder can be merged into the coarse mineral powder blowing pipeline through the fine mineral powder blowing pipeline, so that the fine mineral powder and the coarse mineral powder are mixed and then enter the main blowing pipeline and are sprayed into the smelting reduction furnace through the spray gun, the hot ore blowing amount can be increased, the capacity can be increased, and the production cost can be reduced. Meanwhile, the feeding and blowing subsystem can ensure that the fine mineral powder is continuously and quantitatively input into the fine mineral powder blowing pipeline by arranging two second blowing devices.
In a preferred implementation manner, the fine ore powder feeding and injecting system includes two feeding and injecting subsystems, two fine ore powder injecting pipelines are respectively merged with two coarse ore powder injecting pipelines to form two total injecting pipelines, the two total injecting pipelines are respectively connected with two spray guns disposed on the smelting reduction furnace, and the two spray guns are uniformly disposed on the smelting reduction furnace along the axis of the smelting reduction furnace as a central line.
The fine mineral powder feeding and injecting system consists of two sets of completely same feeding and injecting subsystems, and can ensure that fine mineral powder fed into the smelting reduction furnace is continuously and accurately quantified. And the two spray guns are uniformly arranged on the smelting reduction furnace, so that materials can be uniformly sprayed into the smelting reduction furnace, uniform reaction in the furnace is realized, and the reaction speed is improved.
In a preferred implementation mode, a material level meter is arranged at the top of the second blowing device and used for detecting a high material level signal; the middle part of the second blowing device is provided with a weighing device, the weighing device consists of three weighing sensors which are uniformly arranged in the middle part of the second blowing device along the axis of the second blowing device as a central line, and the weighing device is used for measuring the weight of the fine ore powder in the second blowing device; and a rotary feeder blowing pump is further arranged at an outlet at the bottom of the second blowing device, and a disc star-shaped rotary feeder is arranged in the rotary feeder blowing pump and used for adjusting the blowing amount of the fine mineral powder.
In a preferred implementation, the fine ore powder recycling system further includes:
the fine ore powder mixing system comprises a fine ore powder bin pump, a third blowing device and a hot coarse ore bin which are sequentially connected, wherein an inlet of the fine ore powder bin pump is connected with an outlet of the fine ore powder conveying system, and an outlet of the hot coarse ore bin is connected with the melting reduction furnace.
A fine ore powder mixing system can also be arranged in the fine ore powder recycling system. Therefore, the fine iron ore powder collected by the fine ore powder collecting device can be timely and flexibly conveyed to the fine ore powder bin according to the process requirement, or sprayed into the hot coarse ore bin through the fine ore powder mixing system. The fine mineral powder is directly sprayed into the hot coarse mineral bin, so that the quality such as density, granularity and the like of the coarse mineral powder entering the SRV furnace can be improved, the amount of the fine mineral powder sprayed into the hot coarse mineral bin can be adjusted, the quality of the coarse mineral powder entering the SRV furnace can be adjusted, and the ore spraying amount is further increased.
In a preferred implementation manner, the fine ore powder mixing system at least comprises two mixing subsystems, each mixing subsystem comprises the fine ore powder bin pump and the third blowing device, and an outlet of each mixing subsystem is respectively connected with the hot coarse ore bin;
the two mixing subsystems are used alternately, and when the third blowing device of one of the two mixing subsystems blows, the third blowing device of the other mixing subsystem performs blowing preparation; wherein the blowing preparation includes at least one of exhausting, charging, and pressurizing.
By arranging the two mixing subsystems and alternately using the third blowing devices in the two mixing subsystems, the continuous and quantitative spraying of the fine ore powder from the fine ore powder bin pump into the hot coarse ore bin can be realized, so that the fine ore powder and the coarse ore powder can be better mixed. Meanwhile, the granularity and the bulk density of the coarse mineral powder entering the SRV furnace can be timely adjusted, and the quality of the coarse mineral powder entering the SRV furnace is improved.
In a preferred implementation, the fine ore powder recycling system further includes:
and the PLC control system is respectively connected with the fine mineral powder collecting device, the fine mineral powder conveying system, the fine mineral powder bin and the fine mineral powder feeding and blowing system and is used for controlling the blowing amount in the fine mineral powder conveying process. The operation process of the whole system is fully automatically controlled by a PLC control system.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
FIG. 1 is a schematic diagram illustrating a fine ore fines recycling system for smelting reduction process according to an embodiment of the present invention;
FIG. 2 is a schematic view illustrating another structure of a fine ore fines recycling system for a smelting reduction process according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a configuration of a fine ore powder collecting device and a fine ore powder conveying system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating a fine ore powder bin and a fine ore powder feeding and blowing system according to an embodiment of the present invention.
Reference numerals:
10-fine mineral powder collecting device;
21(21a, 21b, 21c, 21d) -a first blowing device;
30-fine ore powder bin;
41(41a, 41b) -a second blowing device; 42-fine ore powder injection pipeline, 43-coarse ore powder injection pipeline and 44-total injection pipeline;
51-a third blowing device, 52-a hot coarse ore bin and 53-a fine ore powder bin pump;
80-preheating a pre-reduction system;
90-smelting reduction furnace.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
First, the technical concept of the present invention will be explained. The HIsmelt reduction metallurgy process is one of the leading technologies in the metallurgy field today. In the HIsmelt reduction metallurgical process, on one hand, iron ore powder is preheated and pre-reduced before entering the SRV smelting reduction furnace, and the smoke generated in the preheating pre-reduction system contains a large amount of fine iron ore powder, and the particle size of the fine iron ore powder is less than 100 μm. At present, the fine iron ore powder collected by the preheating pre-reduction system is mainly recycled by returning to a raw material plant and mixing into the raw material for continuous use. However, after the part of fine iron ore powder is mixed into the raw material due to small particle size and enters the preheating pre-reduction system again, most of the fine iron ore powder cannot be utilized, and finally enters the flue gas again. This results in a cyclic process, resulting in more and more iron-containing dust being used inefficiently.
On the other hand, the particle size of the iron ore powder injected into the SRV smelting reduction furnace needs to be controlled to 10mm or less due to the particularity of the HIsmelt smelting reduction metallurgical process, and the smaller the particle size of the iron ore powder, the more sufficiently and rapidly the reaction is in the molten bath of the SRV smelting reduction furnace. Meanwhile, the common pneumatic conveying device cannot realize continuous and quantitative blowing of iron ore powder into the SRV melting reduction furnace.
In view of the above problems in the prior art, the utility model provides a novel fine ore powder recycling system suitable for the smelting reduction process.
The specific scheme is as follows:
example one
As shown in fig. 1, the present embodiment provides a fine ore powder recycling system suitable for a smelting reduction process, which includes a fine ore powder collecting device 10, a fine ore powder conveying system, a fine ore powder bin 30, and a fine ore powder feeding and blowing system, which are connected in sequence. Wherein, the inlet of the fine mineral powder collecting device 10 is connected with a preheating pre-reduction system 80 in the smelting reduction process, and the fine mineral powder feeding and blowing system is connected with a smelting reduction furnace 90.
The fine ore powder recycling system of this embodiment can be used in cooperation with the preheating pre-reduction system 80 of the smelting reduction process to flexibly collect iron-containing dust, and the collected iron-containing dust is sprayed into the SRV smelting reduction furnace 90 to react to produce a high-purity raw pig iron material. Therefore, the recovery of the fine ore powder is realized, and the condition that the iron-containing dust is more and cannot be effectively utilized due to ineffective circulation of the fine ore powder in the preheating pre-reduction system 80 is avoided. Meanwhile, the collected fine mineral powder meets the requirement of the granularity of the iron ore powder in the SRV furnace and is sprayed into the SRV furnace, so that the fine mineral powder is recycled, the ore spraying amount of the SRV furnace is increased, the efficient cyclic utilization of the fine mineral powder is realized, and the purposes of energy conservation and emission reduction are achieved.
In this embodiment, the fine ore collecting device 10 can be, for example, a long-bag high-efficiency pulse bag dust collector, or a cyclone gravity dust collector, or a long-bag high-efficiency pulse bag dust collector and a cyclone gravity dust collector.
In this embodiment, the fine ore powder conveying system at least comprises a conveying subsystem, the conveying subsystem at least comprises two first blowing devices 21, inlets of the two first blowing devices 21 are respectively connected with outlets of the fine ore powder collecting device 10, outlet pipelines of the two first blowing devices 21 are combined to form a main pipeline connected with an inlet of the fine ore powder bin 30; the two first blowing devices 21 are used alternately, and when one of the first blowing devices 21 blows, the other first blowing device 21 is ready to blow. Wherein the blowing preparation may for instance comprise at least one of exhausting, charging, pressurizing. In the fine ore powder conveying system, two first blowing devices 21 are provided, and the two first blowing devices 21 are used alternately, so that the fine ore powder can be continuously and quantitatively blown into the fine ore powder bin 30 or the fine ore powder bin pump 53.
In this embodiment, the fine ore fines conveying system includes two conveying subsystems. Because the volume of the fine mineral powder collecting device 10 is large, generally, four first blowing devices 21 are connected to the outlet of the fine mineral powder collecting device 10 for feeding and blowing, and the four first blowing devices 21 are uniformly distributed along the central axis of the fine mineral powder collecting device 10, so that the mineral powder at the bottom of the fine mineral powder collecting device 10 can be fed into a fine mineral powder conveying system for conveying, and the accumulation of the fine mineral powder in the fine mineral powder collecting device 10 can be effectively avoided. It will be understood that the fine ore fines delivery system may include multiple delivery subsystems depending on the design requirements, so long as the fine ore fines stored in the fine ore fines collection apparatus 10 can be efficiently and quickly delivered.
In this embodiment, the fine ore powder feeding and injecting system at least comprises a feeding and injecting subsystem, an inlet of the feeding and injecting subsystem is connected to an outlet of the fine ore powder bin 30, an outlet of the feeding and injecting subsystem is provided with a fine ore powder injecting pipeline 42, the fine ore powder injecting pipeline 42 and the coarse ore powder injecting pipeline 43 are combined to form a total injecting pipeline 44, and the total injecting pipeline 44 is connected to a spray gun (not shown) disposed on the smelting reduction furnace 90; the feeding and blowing subsystem at least comprises two second blowing devices 41, wherein the two second blowing devices 41 are used alternately, and when one second blowing device 41 blows, the other second blowing device 41 performs blowing preparation. Wherein, the blowing preparation at least comprises one of air exhaust, charging and pressurization.
By arranging the fine ore powder feeding and blowing system, the fine ore powder can be merged into the coarse ore powder blowing pipeline 43 through the fine ore powder blowing pipeline 42, so that the fine ore powder and the coarse ore powder are mixed and then enter the main blowing pipeline 44, and are sprayed into the smelting reduction furnace 90 through the spray gun, thus the hot ore blowing amount can be increased, the productivity can be improved, and the production cost can be reduced. Meanwhile, the feeding and blowing subsystem can ensure that the fine ore powder is continuously and quantitatively input into the fine ore powder blowing pipeline 42 by arranging two second blowing devices 41.
In this embodiment, the fine ore powder feeding and injecting system includes two feeding and injecting subsystems, two fine ore powder injecting pipelines 42 are respectively merged with two coarse ore powder injecting pipelines 43 to form two total injecting pipelines 44, the two total injecting pipelines 44 are respectively connected with two spray guns disposed on the smelting reduction furnace 90, and the two spray guns are uniformly disposed on the smelting reduction furnace 90 along the axis of the smelting reduction furnace 90 as the center line.
The fine mineral powder feeding and injecting system is composed of two sets of completely same feeding and injecting subsystems, and can ensure that fine mineral powder fed into the smelting reduction furnace 90 is continuously and quantitatively accurate. And the two spray guns are uniformly arranged on the smelting reduction furnace 90, so that materials can be uniformly sprayed into the smelting reduction furnace 90, uniform reaction in the furnace is realized, and the reaction speed is improved.
In the present embodiment, a level meter is disposed on the top of the second blowing device 41 for detecting a high level signal; the middle part of the second blowing device 41 is provided with a weighing device, the weighing device consists of three weighing sensors which are uniformly arranged in the middle part of the second blowing device 41 by taking the axis of the second blowing device 41 as a central line, and the weighing device is used for measuring the weight of the fine ore powder in the second blowing device 41; and a rotary feeder blowing pump is further arranged at the outlet at the bottom of the second blowing device 41, and a disk star-shaped rotary feeder is arranged in the rotary feeder blowing pump and used for adjusting the blowing amount of the fine mineral powder.
Example two
As shown in fig. 2, the fine ore powder recycling system further includes a fine ore powder mixing system. The fine ore powder mixing system comprises a fine ore powder bin pump 53, a third blowing device 51 and a hot coarse ore bin 52 which are connected in sequence. Wherein, the inlet of the fine ore powder bin pump 53 is connected with the outlet of the fine ore powder conveying system, and the outlet of the hot coarse ore bin 52 is connected with the smelting reduction furnace 90.
A fine ore powder mixing system can also be arranged in the fine ore powder recycling system. Therefore, the fine iron ore powder collected by the fine ore powder collecting device 10 can be timely and flexibly conveyed to the fine ore powder bin 30 according to the process requirements, or sprayed into the hot coarse ore bin 52 through a fine ore powder mixing system. The fine ore powder is directly injected into the hot coarse ore bin 52, so that the quality such as density, granularity and the like of the coarse ore powder entering the SRV smelting reduction furnace 90 can be improved, the amount of the fine ore powder injected into the hot coarse ore bin 52 can be adjusted, the quality of the coarse ore powder entering the SRV smelting reduction furnace 90 can be adjusted, and the ore injection amount is further increased.
In the embodiment, the fine ore powder mixing system at least comprises two mixing subsystems, each mixing subsystem comprises a fine ore powder bin pump 53 and a third blowing device 51, and the outlet of each mixing subsystem is respectively connected with a hot coarse ore bin 52; the two mixing subsystems are used alternately, wherein the third blowing device 51 of one blowing device is used for blowing, and the third blowing device 51 of the other blowing device is used for blowing preparation. Wherein, the blowing preparation at least comprises one of air exhaust, charging and pressurization.
By providing two mixing subsystems and using the third blowing devices 51 of the two mixing subsystems alternately, a continuous and quantitative spraying of fine ore powder from the fine ore powder bin pump 53 into the hot coarse ore bin 52 can be achieved, which enables a better mixing of the fine ore powder with the coarse ore powder. Meanwhile, the granularity and the bulk density of the coarse ore powder entering the SRV smelting reduction furnace 90 can be adjusted timely, and the feeding quality of the coarse ore powder is improved.
In this embodiment, the fine ore powder recycling system further includes a PLC control system. The PLC control system is respectively connected with the fine mineral powder collecting device 10, the fine mineral powder conveying system, the fine mineral powder bin 30 and the fine mineral powder feeding and blowing system and is used for controlling the blowing amount in the fine mineral powder conveying process. The operation process of the whole system is fully automatically controlled by a PLC control system. Preferably, the Siemens S7-300PLC control system is adopted for automatic control, the automation degree is high, and the operation is simple and convenient.
In order to facilitate understanding of the present invention, the fine ore recycling system suitable for the smelting reduction process is further described below:
a fine ore powder recycling system suitable for a smelting reduction process, as shown in fig. 1, comprises a fine ore powder collecting device 10, a fine ore powder conveying system, a fine ore powder bin 30 and a fine ore powder feeding and blowing system. The fine ore powder collecting device 10 is connected to the pre-heating pre-reduction system 80 in the smelting reduction process, and is configured to collect fine ore powder in smoke generated by the pre-heating pre-reduction system 80, and then convey the fine ore powder to the fine ore powder bin 30 through the fine ore powder conveying system. Then, the fine ore powder stored in the fine ore powder bin 30 is directly merged into the coarse ore powder injection pipeline 43 through an injection pipeline of the fine ore powder feeding and injection system, and is mixed with the coarse ore powder in the injection pipeline and then injected into the SRV smelting reduction furnace 90. The fine ore powder recycling system can improve the hot ore injection amount by 50-60T/h, improve the productivity and reduce the production cost.
As shown in fig. 2, the fine ore powder recycling system may further include a fine ore powder mixing system. The fine ore powder mixing system comprises a fine ore powder bin pump 53, a third blowing device 51 and a hot coarse ore bin 52 which are connected in sequence. The inlet of the fine ore powder bin pump 53 is connected with the outlet of the fine ore powder conveying system, and the fine ore powder is blown into the hot coarse ore bin 52 through the third blowing device 51, so that the quality of the coarse ore powder entering the SRV smelting reduction furnace 90, such as density, granularity and the like, is improved, the granularity of the ore powder is ensured to be less than or equal to 6mm, and the bulk density is 2.0-2.8t/m 3. And then the mineral powder in the hot coarse ore bin 52 is sprayed into the SRV smelting reduction furnace 90 through a spraying pipeline and a spray gun for reaction.
The fine mineral powder conveying system comprises two sets of conveying subsystems, and each set of conveying subsystem adopts a tank-combining blowing mode. As shown in fig. 3, the first blowing means of one transport subsystem are 21a and 21 b; the first blowing means of the other transport subsystem are 21c and 21 d. An exhaust pipe is led out from each first blowing device 21 and is communicated with the fine ore powder collecting device 10 above the first blowing device, and the fine ore powder collected by the fine ore powder collecting device 10 is conveyed to the fine ore powder bin 30 or the fine ore powder bin pump 53 through a corresponding conveying pipeline by the fine ore powder conveying system. The four first blowing devices 21 are uniformly distributed along the central axis of the fine mineral powder collecting device 10, so that the mineral powder at the bottom of the fine mineral powder collecting device 10 can be discharged into the fine mineral powder conveying system for conveying, and the accumulation of the fine mineral powder is avoided.
In this embodiment, the fine ore collecting device 10 employs a long bag high efficiency pulse bag dust collector and a cyclone gravity dust collector. The first blowing device 21 is a blowing tank, but it should be understood that the first blowing device 21 may be in other forms as long as fine ore powder can be blown and conveyed according to different design requirements.
Normally, in each set of conveying subsystem, when one blowing tank blows, the other one exhausts, fills and pressurizes. In the whole conveying process, the blowing amount can be adjusted by the control system at any time. The whole system operation process is fully automatically controlled by a PLC control system. By using the two blowing tanks alternately, the fine ore powder can be continuously and quantitatively blown into the fine ore powder bin 30 or the fine ore powder bin pump 53.
The fine mineral powder feeding and blowing system consists of two identical parallel-tank rotary feeding and blowing subsystems. Each set of subsystem outputs a fine mineral powder blowing pipeline 42. Each fine ore powder injection pipeline 42 is combined with one coarse ore powder injection pipeline 43 to form one total injection pipeline 44 in front of the SRV smelting reduction furnace 90 spray guns, and the combined two total injection pipelines 44 inject the mixed ore powder into the SRV smelting reduction furnace 90 through two spray guns (not shown in the figure).
The fine ore powder is quantitatively injected by a rotary feeder, and each set of fine ore powder injection subsystem comprises two second injection devices 41. A material level meter is arranged at the top of each second blowing device 41 and used for measuring high material level signals; a weighing device is arranged in the middle position and adopts three groups of weighing sensors which are uniformly arranged on the second blowing device 41; and a rotary feeder blowing pump is arranged at the outlet at the bottom. A blowing pump of a rotary feeder comprises a rotary feeding motor and a disk star-shaped rotary feeder and is used for quantitatively blowing fine mineral powder. In the present embodiment, the second blowing device 41 is a blowing tank, but it should be understood that the second blowing device 41 may be in other forms as long as fine ore powder can be blown and conveyed according to different design requirements.
The blowing amount is adjusted by a volume-metering disk star-shaped rotary feeder at the outlet of the blowing tank, and outlet pipelines behind the two feeders are connected to the same blowing main pipe through outlet valves. The feeding process of the fine ore powder in the blowing tank is completed by a rotary feeder, and the feeding amount, namely the blowing speed, of the feeder is in direct proportion to the rotating speed of the feeder. The rotary feeder is driven by a variable frequency motor, the speed of which is controlled by a Variable Frequency Drive (VFD), ensuring accurate control of the total process volume. An exhaust pipe is led out from each injection tank and is communicated with the fine ore powder bin 30 above the injection tank, and gas displaced in the charging process can be returned to the fine ore powder bin 30, so that the pressure in the injection tank is reduced to the atmospheric pressure before the injection tank starts the next charging process.
During normal blowing, the two blowing tanks alternately operate, and when the rotary feeder of one rotary feeder blowing pump is accelerated to start, the rotary feeder of the other pump starts to decelerate, and vice versa. This ensures that a constant amount of fine ore is introduced into the main injection duct 44. In the whole blowing process, the blowing amount can be adjusted by the PLC control system at any time.
The fully automatic control operation of the fine ore powder feeding and blowing system is as follows, as shown in fig. 4, taking two second blowing devices 41a and 41b as an example:
first, the exhaust valve of the second blowing device 41a is opened to release the pressure. The operation can be completed by two exhaust valves in two steps, so that the exhaust speed can be reduced, and the scouring abrasion of the exhaust valves and the exhaust pipeline can be reduced;
further, when the pressure of the second blowing device 41a is released, the outlet valve of the fine ore bin 30 and the inlet dome valve of the second blowing device 41a are opened. At the same time, the fluidizing device at the outlet of the fine ore bin 30 is started to perform the fluidization. The mineral powder is poured into the second blowing device 41a from the fine mineral powder bin 30 under the action of gravity;
further, when the high level gauge signal in the second blowing device 41a is triggered, the outlet valve of the fine ore bin 30, the exhaust valve of the second blowing device 41a and the inlet dome valve are closed, the second blowing device 41a is opened to press the fluidizing valve, and the second blowing device 41a is pressurized and fluidized until the pressure in the blowing pipe is equal to the pressure in the blowing pipe.
The outlet valve of the second blowing device 41a is further opened, the blowing nitrogen is opened, the rotary feeder is accelerated and started, and at the moment, the rotary feeder of the second blowing device 41b starts to decelerate, so that the amount of the mineral powder entering the main pipe is fixed. The exhaust valve of the second blowing device 41b is opened to release the pressure, and then the charging and pressurizing steps are performed in the same manner as the second blowing device 41 a.
Further according to the test signal of the weighing device, when the fine ore powder in the second blowing device 41a is nearly exhausted, the second blowing device 41b is started to perform tank switching blowing;
further, the second blowing device 41a closes the outlet dome valve some time after the feeder stops, and the second blowing device 41a starts to exhaust air for the next cycle.
In addition, the fine ore powder recycling system suitable for the smelting reduction process can also comprise a fine ore powder mixing system. Wherein, the fine mineral powder mixing system adopts a mode that two mixing subsystems work alternately and circularly. The fine mineral powder collected by the fine mineral powder collecting device 10 is blown to a fine mineral powder bin pump 53 through a fine mineral powder conveying system connected to the lower portion, the fine mineral powder is poured into the third blowing device 51 from the fine mineral powder bin pump 53 by the action of gravity, and the fine mineral powder is blown to the hot coarse mineral bin 52 by blowing nitrogen.
Each mixing subsystem includes 1 fine ore hopper pump 53 and 1 third blowing device 51. An exhaust pipe is led out from each third blowing device 51 and is communicated with a fine ore powder bin pump 53 above the exhaust pipe. While the third blowing device 51 in one mixing subsystem blows, the third blowing device 51 of the other exhausts, charges and pressurizes. In the present embodiment, the third blowing device 51 is a blowing tank.
Under normal conditions, the operation process of the whole set of system is controlled by a PLC control system in a full-automatic mode. The full-automatic control operation process of the fine ore powder mixing system is as follows, taking one subsystem as an example:
first, the exhaust valve of the third blowing device 51 is opened to release the pressure.
Further, when the pressure of the third blowing device 51 is released, the inlet valve of the third blowing device 51, the air-tight valve and the outlet valve of the fine ore bin pump 53 are opened. And simultaneously, the fluidization device at the outlet of the fine ore bin pump 53 is started to carry out fluidization. Pouring the fine mineral powder from the fine mineral powder bin pump 53 into the third blowing device 51 under the action of gravity;
further, after the high level gauge signal in the third blowing device 51 is triggered, the outlet valve of the fine ore bin pump 53, the airtight valve and the inlet valve of the third blowing device 51 are closed, the pressurizing and fluidizing valve of the third blowing device 51 is opened, and the third blowing device 51 is pressurized and fluidized until the pressure of the third blowing device 51 reaches 550-600 KPa;
the outlet valves of the further blowing pipeline nitrogen blowing valve and the third blowing device 51 are opened, and the fine ore powder is conveyed to the hot coarse ore bin 52;
the exhaust valve of the third blowing device 51 is further opened for the next cycle.
The utility model can be realized by adopting or using the prior art for reference in places which are not mentioned in the utility model.
The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various changes or substitutions within the technical scope of the present invention, which should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "square," and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The above disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described above. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Claims (10)
1. A fine ore powder recycling system suitable for a smelting reduction process is characterized by comprising:
the fine mineral powder feeding and blowing system is connected with the preheating pre-reduction system in the smelting reduction process, and the fine mineral powder feeding and blowing system is connected with the smelting reduction furnace.
2. The fine ore fines recovery system for use in a smelting reduction process according to claim 1, wherein:
the fine mineral powder collecting device comprises a long-bag high-efficiency pulse bag-type dust collector and/or a cyclone gravity dust collector.
3. The fine ore fines recovery system for use in a smelting reduction process according to claim 1, wherein:
the fine ore powder conveying system at least comprises a conveying subsystem, the conveying subsystem at least comprises two first blowing devices, inlets of the two first blowing devices are respectively connected with outlets of the fine ore powder collecting devices, and outlet pipelines of the two first blowing devices are combined to form a main pipeline connected with an inlet of the fine ore powder bin;
the two first blowing devices are alternately used, and when one first blowing device blows, the other first blowing device performs blowing preparation; wherein the blowing preparation includes at least one of exhausting, charging, and pressurizing.
4. The fine ore fines recovery system for use in a smelting reduction process according to claim 3, wherein:
the fine ore powder conveying system comprises two conveying subsystems.
5. The fine ore fines recovery system for use in a smelting reduction process according to claim 1, wherein:
the fine mineral powder feeding and blowing system at least comprises a feeding and blowing subsystem, wherein an inlet of the feeding and blowing subsystem is connected with an outlet of the fine mineral powder bin, an outlet of the feeding and blowing subsystem is provided with a fine mineral powder blowing pipeline, the fine mineral powder blowing pipeline and the coarse mineral powder blowing pipeline are combined to form a total blowing pipeline, and the total blowing pipeline is connected with a spray gun arranged on the smelting reduction furnace;
the feeding and blowing subsystem at least comprises two second blowing devices which are used alternately, wherein when one second blowing device performs blowing, the other second blowing device performs blowing preparation; wherein the blowing preparation includes at least one of exhausting, charging, and pressurizing.
6. The fine ore fines recovery system for use in a smelting reduction process according to claim 5, wherein:
the fine mineral powder feeding and injecting system comprises two feeding and injecting subsystems, two fine mineral powder injecting pipelines are respectively combined with two coarse mineral powder injecting pipelines to form two main injecting pipelines, the two main injecting pipelines are respectively connected with two spray guns arranged on the smelting reduction furnace, and the two spray guns are uniformly arranged on the smelting reduction furnace along the axis of the smelting reduction furnace as a central line.
7. The fine ore fines recovery system for use in a smelting reduction process according to claim 5, wherein:
a material level meter is arranged at the top of the second injection device and used for detecting a high material level signal; the middle part of the second blowing device is provided with a weighing device, the weighing device consists of three weighing sensors which are uniformly arranged in the middle part of the second blowing device along the axis of the second blowing device as a central line, and the weighing device is used for measuring the weight of the fine ore powder in the second blowing device; and a rotary feeder blowing pump is further arranged at an outlet at the bottom of the second blowing device, and a disc star-shaped rotary feeder is arranged in the rotary feeder blowing pump and used for adjusting the blowing amount of the fine mineral powder.
8. The fine ore fines recovery system for a smelting reduction process of claim 1, further comprising:
the fine ore powder mixing system comprises a fine ore powder bin pump, a third blowing device and a hot coarse ore bin which are sequentially connected, wherein an inlet of the fine ore powder bin pump is connected with an outlet of the fine ore powder conveying system, and an outlet of the hot coarse ore bin is connected with the melting reduction furnace.
9. The fine ore fines recovery system for use in a smelting reduction process according to claim 8, wherein:
the fine ore powder mixing system at least comprises two mixing subsystems, each mixing subsystem comprises a fine ore powder bin pump and a third blowing device, and an outlet of each mixing subsystem is connected with the hot coarse ore bin;
the two mixing subsystems are used alternately, and when the third blowing device of one of the two mixing subsystems blows, the third blowing device of the other mixing subsystem performs blowing preparation; wherein the blowing preparation includes at least one of exhausting, charging, and pressurizing.
10. The fine ore fines recovery system for a smelting reduction process according to any one of claims 1-9, further comprising:
and the PLC control system is respectively connected with the fine mineral powder collecting device, the fine mineral powder conveying system, the fine mineral powder bin and the fine mineral powder feeding and blowing system and is used for controlling the blowing amount in the fine mineral powder conveying process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021132134.6U CN212925076U (en) | 2020-06-16 | 2020-06-16 | Fine mineral powder recycling system suitable for smelting reduction process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021132134.6U CN212925076U (en) | 2020-06-16 | 2020-06-16 | Fine mineral powder recycling system suitable for smelting reduction process |
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| CN212925076U true CN212925076U (en) | 2021-04-09 |
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| CN202021132134.6U Active CN212925076U (en) | 2020-06-16 | 2020-06-16 | Fine mineral powder recycling system suitable for smelting reduction process |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hebei Xinggang Technology Co.,Ltd. Assignor: SHANDONG MOLONG PETROLEUM MACHINERY Co.,Ltd. Contract record no.: X2023980034949 Denomination of utility model: A Fine Mineral Powder Recycling and Utilization System Suitable for Melt Reduction Process Granted publication date: 20210409 License type: Common License Record date: 20230423 |
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