Device for adding CDQ powder in blast furnace injection and pulverizing system

Abstract

The utility model provides a device for feeding CDQ powder in blast furnace injection and a powder making system, which belong to the technical field of blast furnace injection powder making, and comprise a fine powder bin, a coarse powder bin and a powder making pipe group, the fine powder bin is used for storing fine CDQ powder; the coarse powder bin is used for storing coarse CDQ powder; the pulverizing pipe set comprises a coarse powder conveying branch pipe, a fine powder conveying branch pipe, a powder collecting box body and a coal mill, the fine powder conveying branch pipe and the coarse powder conveying branch pipe are both connected with the powder collecting box body, the coal mill is arranged on the coarse powder conveying branch pipe, and CDQ powder enters the powder collecting box body after being ground by the coal mill; wherein the number of the powder making pipe sets is at least two, switching assemblies are arranged between the fine powder bin and the powder making pipe sets and between the coarse powder bin and the powder making pipe sets, the fine powder bin and the coarse powder bin are connected with the powder making pipe sets through the switching assemblies respectively, and the switching assemblies are used for controlling connection and disconnection between the fine powder bin and the powder making pipe sets and between the coarse powder bin and the powder making pipe sets. In this way, the situations that fine CDQ powder which does not need to be ground enters the coal mill, energy is wasted, the coal mill is abraded and the like can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of blast furnace injection pulverizing technology, and in particular relates to a device and pulverizing system for adding CDQ powder in blast furnace injection. Background Technology

[0002] CDQ (Coke Dry Quenching) powder is a powder produced during the dry quenching process and has a high carbon content. To achieve the recycling of carbon resources, many steel companies use it as a substitute for pulverized coal injection fuel in pulverizing units for blast furnace injection. Based on particle size, CDQ powder with a diameter greater than 180 mesh (80μm) is generally considered coarse powder, while powder with a diameter less than 180 mesh (80μm) is considered fine powder. Currently, when pulverizing units add CDQ powder, they do not differentiate by particle size; all CDQ powder of varying sizes is mixed, stored centrally, and then fed into the pulverizer inlet or collection box of the pulverizing unit via the CDQ powder conveying system. Furthermore, a single CDQ powder conveying system can only supply CDQ powder to one pulverizing unit.

[0003] In actual production, using CDQ powder in the above manner presents the following problems: ① The particle size of fine CDQ powder is close to that of pulverized coal (75μm), so it can be used as a substitute for pulverized coal without grinding. However, due to the high hardness of CDQ powder, entering the coal mill will not only increase power consumption but also increase the grinding load of the coal mill, reduce its lifespan and grinding efficiency. Simultaneously, the fine powder will also exacerbate wear on the pipelines along the way as it enters the collection box from the coal mill; ② Because coarse CDQ powder contains a certain proportion of coarse particles with a diameter >1mm, this size of CDQ powder needs to be ground before being mixed with pulverized coal. If it directly enters the collection box and mixes with pulverized coal, it will cause blockage of the pulverized coal injection system's nozzles, affecting the stable pulverized coal injection of the blast furnace; ③ When a CDQ powder conveying system malfunctions or is under maintenance, its corresponding pulverizing pipe group cannot receive CDQ powder, resulting in a decrease in the utilization rate of CDQ powder. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a device and pulverizing system for adding CDQ powder in blast furnace injection, which solves the problems in the prior art that do not differentiate the particle size of CDQ powder, which increases the wear of pipelines and coal mills, easily clogs the injection gun, and cannot properly add CDQ powder when the CDQ powder conveying system malfunctions or is under maintenance.

[0005] To achieve the above and other related objectives, this utility model provides an apparatus for incorporating CDQ powder into blast furnace injection, comprising:

[0006] Fine powder silo, which is used to store fine-grained CDQ powder;

[0007] Coarse powder silo, which is used to store coarse-grained CDQ powder;

[0008] The pulverizing pipe assembly includes a coarse powder conveying branch pipe, a fine powder conveying branch pipe, a powder collection box, and a coal mill. The fine powder conveying branch pipe and the coarse powder conveying branch pipe are both connected to the powder collection box. A coal mill is installed on the coarse powder conveying branch pipe. CDQ powder enters the powder collection box after being ground by the coal mill.

[0009] The number of the powder-making tube groups is at least 2. A switching component is provided between the fine powder bin and the coarse powder bin and the powder-making tube group. The fine powder bin and the coarse powder bin are respectively connected to each of the powder-making tube groups through the switching component. The switching component is used to control the connection and disconnection between the fine powder bin and the coarse powder bin and each of the powder-making tube groups.

[0010] Optionally, the number of powder-making pipe groups is 2. The fine powder bin is connected to one of the powder-making pipe groups through the fine powder conveying main pipe, and the coarse powder bin is connected to the other powder-making pipe group through the coarse powder conveying main pipe. The switching component includes a first connecting pipe, a first switching valve disposed on the fine powder conveying main pipe, and a second switching valve disposed on the coarse powder conveying main pipe. A third switching valve is disposed on the first connecting pipe. The first end of the first connecting pipe is connected to the coarse powder conveying main pipe, and the second end of the first connecting pipe is connected to the fine powder conveying main pipe.

[0011] Optionally, the switching component further includes a second connecting pipe, on which a fourth switching valve is provided. The first end of the second connecting pipe is connected to the fine powder conveying main pipe, and the second end of the second connecting pipe is connected to the coarse powder conveying main pipe. The first end of the first connecting pipe is closer to the coarse powder hopper than the second end of the second connecting pipe. The second switching valve on the coarse powder conveying main pipe is located between the first end of the first connecting pipe and the second end of the second connecting pipe. The first end of the second connecting pipe is closer to the fine powder hopper than the second end of the first connecting pipe. The first switching valve on the fine powder conveying main pipe is located between the first end of the second connecting pipe and the second end of the first connecting pipe.

[0012] Optionally, both the fine powder conveying main pipe and the coarse powder conveying main pipe are equipped with regulating valves and flow meters.

[0013] Optionally, a coarse powder conveying branch pipe is provided with a coarse powder branch pipe switch valve on the side near the switching component, and a fine powder conveying branch pipe is provided with a fine powder branch pipe switch valve on the side near the switching component.

[0014] Optionally, the coal mill is equipped with a coal feeder for transporting raw coal to the coal mill.

[0015] Optionally, the coal feeder is equipped with a weighing sensor, which is used to measure the weight of the raw coal on the coal feeder.

[0016] Optionally, the powder-making tube assembly further includes a powder outlet tube, one end of which is connected to the powder collection box, and the other end of which is equipped with a fan.

[0017] Optionally, the fine powder conveying branch pipe includes a fine powder pipe, a first fine powder branch pipe, and a second fine powder branch pipe. One end of the fine powder pipe is connected to the first fine powder branch pipe and the second fine powder branch pipe, respectively, and the other end of the fine powder pipe is connected to the fine powder bin or the coarse powder bin. The first fine powder branch pipe is connected to the upper part of the powder collection box, and the second fine powder branch pipe is connected to the conical part at the lower part of the powder collection box.

[0018] This utility model also provides a pulverizing system, including the device described above for incorporating CDQ powder in blast furnace injection.

[0019] As described above, the apparatus and pulverizing system of this utility model for incorporating CDQ powder in blast furnace injection have the following beneficial effects:

[0020] By installing coarse powder conveying branch pipes and fine powder conveying branch pipes in the pulverizing pipe assembly, coarse CDQ powder can be conveyed to the coal mill for grinding before being conveyed to the powder collection box. Fine CDQ powder can be directly conveyed to the powder collection box through the fine powder conveying branch pipe. This avoids fine CDQ powder that does not need to be ground from entering the coal mill, thus preventing energy waste and wear on the coal mill. Furthermore, by installing at least two pulverizing pipe assemblies, pulverizing can be carried out using another pulverizing pipe assembly when one is under maintenance or out of service, ensuring high utilization of CDQ powder. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the device for adding CDQ powder in blast furnace injection according to an embodiment of the present invention;

[0022] Figure 2 This is an enlarged structural schematic diagram of the switching component according to an embodiment of the present invention.

[0023] Labeling Explanation: 1. Coarse Powder Bin; 2. Regulating Valve; 3. Flow Meter; 4. Fine Powder Bin; 5. Fine Powder Conveying Main Pipe; 6. Coarse Powder Conveying Main Pipe; 7. Switching Component; 701. First Connecting Pipe; 702. Second Connecting Pipe; 703. Second Switching Valve; 704. Third Switching Valve; 705. First Switching Valve; 706. Fourth Switching Valve; 8. Fine Powder Branch Switching Valve; 9. Coarse Powder Conveying Branch Pipe; 901. Coarse Powder Branch Pipe Switching Valve; 10. Fine Powder Conveying Branch Pipe; 101. Fine Powder Branch Pipe Switching Valve; 11. Coal Mill; 12. First Fine Powder Branch Pipe; 13. Coal Feeder; 14. Second Fine Powder Branch Pipe; 15. Powder Collection Box; 16. Powder Discharge Pipe; 17. Fan; 18. Raw Coal Bin. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0025] Please see Figure 1 and Figure 2 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0026] To provide a detailed description of this utility model, the following is a specific description of an apparatus and pulverizing system for incorporating CDQ powder in blast furnace injection:

[0027] Please combine Figure 1As shown, this utility model provides a device for adding CDQ powder in blast furnace injection, including a fine powder bin 4, a coarse powder bin 1, and a pulverizing pipe assembly. The fine powder bin 4 is used to store fine-grained CDQ powder; the coarse powder bin 1 is used to store coarse-grained CDQ powder; the pulverizing pipe assembly includes a coarse powder conveying branch pipe 9, a fine powder conveying branch pipe 10, a powder collection box 15, and a coal mill 11. The fine powder conveying branch pipe 10 and the coarse powder conveying branch pipe 9 are both connected to the powder collection box 15. The coal mill 11 is installed on the coarse powder conveying branch pipe 9, and the CDQ powder enters the powder collection box 15 after being ground by the coal mill 11. The number of pulverizing pipe assemblies is at least 2. A switching component 7 is provided between the fine powder bin 4 and the coarse powder bin 1 and the pulverizing pipe assembly. The fine powder bin 4 and the coarse powder bin 1 are respectively connected to each pulverizing pipe assembly through the switching component 7. The switching component 7 is used to control the on / off connection between the fine powder bin 4 and the coarse powder bin 1 and each pulverizing pipe assembly. By installing coarse powder conveying branch pipe 9 and fine powder conveying branch pipe 10 in the pulverizing pipe assembly, coarse CDQ powder can be conveyed to the coal mill 11 for grinding, and then conveyed to the powder collection box 15. Fine CDQ powder can be directly conveyed to the powder collection box through the fine powder conveying branch pipe 10. This avoids fine CDQ powder that does not need to be ground from entering the coal mill 11, thus preventing energy waste and wear on the coal mill 11. At the same time, by setting up at least two pulverizing pipe assemblies, when one pulverizing pipe assembly is under maintenance or out of service, the other pulverizing pipe assembly can be used for pulverizing, ensuring the utilization rate of CDQ powder.

[0028] like Figure 2 As shown, there are two powder-making pipe groups. The fine powder bin 4 is connected to one powder-making pipe group via the fine powder conveying main pipe 5, and the coarse powder bin 1 is connected to another powder-making pipe group via the coarse powder conveying main pipe 6. The switching component 7 includes a first connecting pipe 701, a first switching valve 705 installed on the fine powder conveying main pipe 5, and a second switching valve 703 installed on the coarse powder conveying main pipe 6. A third switching valve 704 is installed on the first connecting pipe 701. The first end of the first connecting pipe 701 is connected to the coarse powder conveying main pipe 6, and the second end of the first connecting pipe 701 is connected to the fine powder conveying main pipe 5. By setting the first connecting pipe 701, CDQ powder in the coarse powder bin 1 and the fine powder bin 4 can enter either powder-making pipe group. When one powder-making pipe group is under maintenance or out of operation, CDQ powder can be dispensed through the other powder-making pipe group. It can simultaneously collect coarse and fine CDQ powder, maximizing the utilization rate of CDQ powder and ensuring its efficient use, thereby reducing the cost of using blast furnace injection raw materials and improving the economic benefits of the blast furnace injection production line.

[0029] In this embodiment, the coarse powder conveying branch pipe 9 and the fine powder conveying branch pipe 10 of a powder-making pipe group are connected to the fine powder conveying main pipe 5 through the same connection point, and the coarse powder conveying branch pipe 9 and the fine powder conveying branch pipe 10 of the powder-making pipe group are connected to the coarse powder conveying main pipe 6 through the same connection point. Each fine powder conveying branch pipe 10 in each powder-making pipe group is equipped with a fine powder branch pipe switching valve 101 to control the on / off state of each fine powder conveying branch pipe 10; each coarse powder conveying branch pipe 9 in each powder-making pipe group is equipped with a coarse powder branch pipe switching valve 901 to control the on / off state of each coarse powder conveying branch pipe 9 respectively. The coarse powder branch pipe switching valve 901 on the coarse powder conveying branch pipe 9 and the fine powder branch pipe switching valve 101 on the fine powder conveying branch pipe 10 are both located close to the switching assembly 7 to ensure that during the material transport process, only a small amount of material with a particle size that does not match the material transported by the fine powder conveying branch pipe 10 or the coarse powder conveying branch pipe 9 enters the fine powder conveying branch pipe 10 or the coarse powder conveying branch pipe 9. For example, when fine CDQ powder enters the fine powder conveying branch pipe 10, since there is a certain distance between the coarse powder branch pipe switch valve 901 on the coarse powder conveying branch pipe 9 and the connection point of the fine powder conveying main pipe 5, a certain amount of fine CDQ powder will enter the coarse powder conveying branch pipe 9 corresponding to the distance. Therefore, the fine powder branch pipe switch valve 101 on the fine powder conveying branch pipe 10 and the coarse powder branch pipe switch valve 901 on the coarse powder conveying branch pipe 9 are both set close to the switching component 7, which can reduce the amount of fine CDQ powder entering the coarse powder conveying branch pipe 9.

[0030] The switching component 7 also includes a second connecting pipe 702, on which a fourth switching valve 706 is provided. The first end of the second connecting pipe 702 is connected to the fine powder conveying main pipe 5, and the second end of the second connecting pipe 702 is connected to the coarse powder conveying main pipe 6. The first end of the first connecting pipe 701 is closer to the coarse powder bin 1 than the second end of the second connecting pipe 702. The second switching valve 703 on the coarse powder conveying main pipe 6 is located between the first end of the first connecting pipe 701 and the second end of the second connecting pipe 702. The first end of the second connecting pipe 702 is closer to the fine powder bin 4 than the second end of the first connecting pipe 701. The first switching valve 705 on the fine powder conveying main pipe 5 is located between the first end of the second connecting pipe 702 and the second end of the first connecting pipe 701. In this embodiment, the pulverizing pipe group directly connected to the coarse powder bin 1 via the coarse powder conveying main pipe 6 is the first pulverizing pipe group, and the pulverizing pipe group directly connected to the fine powder bin 4 via the fine powder conveying main pipe 5 is the second pulverizing pipe group. A first connecting pipe 701 and a second connecting pipe 702 are provided, with the first end of the first connecting pipe 701 closer to the coarse powder bin 1 than the second end of the second connecting pipe 702, and the first end of the second connecting pipe 702 closer to the fine powder bin 4 than the second end of the first connecting pipe 701. The third switch valve 70 of the first connecting pipe 701 is opened and closed. The fourth switch valve 706 on the 4th and second connecting pipe 702 can reasonably allocate the amount of coarse CDQ powder in the first pulverizing pipe group and the second pulverizing pipe group, and regulate the amount of coarse CDQ powder in the coal mill 11 of each pulverizing pipe group, thereby improving the preparation efficiency of CDQ powder. That is, when the coarse CDQ powder in the coal mill 11 of the first pulverizing pipe group reaches the maximum safe grinding amount, the coarse CDQ powder in the coarse material bin can be transported to the coal mill 11 of the second pulverizing pipe group for grinding by adjusting the switching component 7, thus improving the preparation efficiency of CDQ powder.

[0031] Specifically, both the fine powder conveying main pipe 5 and the coarse powder conveying main pipe 6 are equipped with regulating valves 2 and flow meters 3. By setting the regulating valves 2 and flow meters 3, the flow rate in each conveying main pipe can be manually or automatically adjusted according to the flow rate in each pipe to ensure that the conveying rate of fine and coarse powder meets the requirements.

[0032] The coal mill 11 is equipped with a coal feeder 13, which transports raw coal to the coal mill 11. By providing the coal feeder 13, raw coal can be added as a supplement when the CDQ powder output is insufficient, increasing the adaptability of the device to different scenarios in the production process. In this embodiment, the raw coal bunker 18 supplies raw coal to the coal feeder 13.

[0033] In this embodiment, a weighing sensor is installed on the coal feeder 13 to measure the weight of the raw coal on the coal feeder 13. By installing the weighing sensor, the amount of raw coal fed into the coal mill 11 by the coal feeder 13 can be known, thereby facilitating the adjustment of the amount of raw coal on the coal feeder 13.

[0034] The powder-making pipe assembly also includes a powder outlet pipe 16. One end of the powder outlet pipe 16 is connected to the powder collection box 15, and the other end of the powder outlet pipe 16 is equipped with a fan 17. This facilitates the intake of carbon-containing powder in the fine powder conveying branch pipe 10 into the powder collection box 15. The carbon-containing powder here can be a single CDQ powder or a mixture of carbon powder ground from the original carbon and CDQ powder.

[0035] In this embodiment, the fine powder conveying branch pipe 10 includes a fine powder pipe, a first fine powder branch pipe 12, and a second fine powder branch pipe 14. One end of the fine powder pipe is connected to the first fine powder branch pipe 12 and the second fine powder branch pipe 14 respectively, and the other end of the fine powder pipe is connected to the fine powder bin 4 or the coarse powder bin 1. The first fine powder branch pipe 12 is connected to the upper part of the powder collection box 15, and the second fine powder branch pipe 14 is connected to the conical part at the bottom of the powder collection box 15. Carbon-containing powder can enter the powder collection box 15 through the first fine powder branch pipe 12 or the second fine powder branch pipe 14. Since the first fine powder branch pipe 12 is connected to the upper part of the powder collection box 15, when the suction of the blower 17 is limited or the blower 17 is stopped, the suction force on the carbon-containing powder is weak, and the carbon-containing powder cannot overcome its own gravity and is sucked into the powder collection box 15. At this time, the carbon-containing powder can enter the powder collection box 15 through the second fine powder branch pipe 14. This improves the compatibility of the device with different operating environments and enhances the overall stability of the device. Fine powder branch switching valves are installed on both the first fine powder branch pipe 12 and the second fine powder branch pipe 14 to control the opening and closing of the two fine powder branch pipes.

[0036] This utility model also provides a pulverizing system, including the device described above for incorporating CDQ powder in blast furnace injection.

[0037] In summary, by installing coarse powder conveying branch pipe 9 and fine powder conveying branch pipe 10 in the pulverizing pipe assembly, coarse CDQ powder can be conveyed to the coal mill 11 for grinding and then conveyed to the powder collection box 15. Fine CDQ powder can be directly conveyed to the powder collection box through the fine powder conveying branch pipe 10. This avoids fine CDQ powder that does not need to be ground from entering the coal mill 11, thus preventing energy waste and wear on the coal mill 11. At the same time, by setting up at least two pulverizing pipe assemblies, when one pulverizing pipe assembly is under maintenance or out of service, the other pulverizing pipe assembly can be used for pulverizing, ensuring the utilization rate of CDQ powder.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An apparatus for incorporating CDQ powder into blast furnace injection, characterized in that, include: Fine powder silo, which is used to store fine-grained CDQ powder; Coarse powder silo, which is used to store coarse-grained CDQ powder; The pulverizing pipe assembly includes a coarse powder conveying branch pipe, a fine powder conveying branch pipe, a powder collection box, and a coal mill. The fine powder conveying branch pipe and the coarse powder conveying branch pipe are both connected to the powder collection box. A coal mill is installed on the coarse powder conveying branch pipe. CDQ powder enters the powder collection box after being ground by the coal mill. The number of the powder-making tube groups is at least 2. A switching component is provided between the fine powder bin and the coarse powder bin and the powder-making tube group. The fine powder bin and the coarse powder bin are respectively connected to each of the powder-making tube groups through the switching component. The switching component is used to control the connection and disconnection between the fine powder bin and the coarse powder bin and each of the powder-making tube groups.

2. The apparatus for adding CDQ powder in blast furnace injection according to claim 1, characterized in that: The number of powder-making pipe groups is 2. The fine powder bin is connected to one of the powder-making pipe groups through the fine powder conveying main pipe, and the coarse powder bin is connected to the other powder-making pipe group through the coarse powder conveying main pipe. The switching component includes a first connecting pipe, a first switching valve disposed on the fine powder conveying main pipe, and a second switching valve disposed on the coarse powder conveying main pipe. A third switching valve is disposed on the first connecting pipe. The first end of the first connecting pipe is connected to the coarse powder conveying main pipe, and the second end of the first connecting pipe is connected to the fine powder conveying main pipe.

3. The apparatus for incorporating CDQ powder in blast furnace injection according to claim 2, characterized in that: The switching component further includes a second connecting pipe, on which a fourth switching valve is provided. The first end of the second connecting pipe is connected to the fine powder conveying main pipe, and the second end of the second connecting pipe is connected to the coarse powder conveying main pipe. The first end of the first connecting pipe is closer to the coarse powder hopper than the second end of the second connecting pipe. The second switching valve on the coarse powder conveying main pipe is located between the first end of the first connecting pipe and the second end of the second connecting pipe. The first end of the second connecting pipe is closer to the fine powder hopper than the second end of the first connecting pipe. The first switching valve on the fine powder conveying main pipe is located between the first end of the second connecting pipe and the second end of the first connecting pipe.

4. The apparatus for adding CDQ powder in blast furnace injection according to claim 2, characterized in that: Both the fine powder conveying main pipe and the coarse powder conveying main pipe are equipped with regulating valves and flow meters.

5. The apparatus for adding CDQ powder in blast furnace injection according to claim 1, characterized in that: A coarse powder conveying branch pipe switch valve is provided on the side of the switching component near the coarse powder conveying branch pipe, and a fine powder conveying branch pipe switch valve is provided on the side of the switching component near the fine powder conveying branch pipe.

6. The apparatus for incorporating CDQ powder in blast furnace injection according to any one of claims 1-5, characterized in that: The coal mill is equipped with a coal feeder, which is used to transport raw coal to the coal mill.

7. The apparatus for incorporating CDQ powder in blast furnace injection according to claim 6, characterized in that: The coal feeder is equipped with a weighing sensor, which is used to measure the weight of the raw coal on the coal feeder.

8. The apparatus for incorporating CDQ powder in blast furnace injection according to any one of claims 1-5, characterized in that: The powder-making tube assembly also includes a powder outlet tube, one end of which is connected to the powder collection box, and the other end of which is equipped with a fan.

9. The apparatus for incorporating CDQ powder in blast furnace injection according to claim 8, characterized in that: The fine powder conveying branch pipe includes a fine powder pipe, a first fine powder branch pipe, and a second fine powder branch pipe. One end of the fine powder pipe is connected to the first fine powder branch pipe and the second fine powder branch pipe, respectively, and the other end of the fine powder pipe is connected to the fine powder bin or the coarse powder bin. The first fine powder branch pipe is connected to the upper part of the powder collection box, and the second fine powder branch pipe is connected to the conical part at the bottom of the powder collection box.

10. A powder-making system, characterized in that, Includes the apparatus for incorporating CDQ powder in blast furnace injection as described in any one of claims 1-9.

Images