CN112280975A - Method and device for pressing powder balls under screen of rotary hearth furnace - Google Patents
Method and device for pressing powder balls under screen of rotary hearth furnace Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 60
- 238000003825 pressing Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000011230 binding agent Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000047 product Substances 0.000 claims abstract description 22
- 239000000428 dust Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000008188 pellet Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000011265 semifinished product Substances 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 5
- 230000009467 reduction Effects 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 244000247812 Amorphophallus rivieri Species 0.000 claims description 15
- 235000001206 Amorphophallus rivieri Nutrition 0.000 claims description 15
- 229920002261 Corn starch Polymers 0.000 claims description 15
- 229920002752 Konjac Polymers 0.000 claims description 15
- 239000008120 corn starch Substances 0.000 claims description 15
- 235000013312 flour Nutrition 0.000 claims description 15
- 235000010485 konjac Nutrition 0.000 claims description 15
- 239000000252 konjac Substances 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 8
- 230000001007 puffing effect Effects 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 238000005453 pelletization Methods 0.000 claims 2
- 239000008187 granular material Substances 0.000 claims 1
- 238000003801 milling Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 33
- 229910052742 iron Inorganic materials 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 12
- 239000002351 wastewater Substances 0.000 abstract description 9
- 238000009628 steelmaking Methods 0.000 abstract description 7
- 239000002912 waste gas Substances 0.000 abstract description 5
- 238000000227 grinding Methods 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 10
- 239000010802 sludge Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
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- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method and a device for pressing powder balls under a screen of a rotary hearth furnace, which comprises the following steps: screening the metal balls and undersize powder after sintering reduction of the rotary hearth furnace, metering and conveying the metal balls and undersize powder to a closed bin, putting the undersize powder in the closed bin into a double-shaft stirrer, and sequentially adding a binder and water into the double-shaft stirrer to obtain a mixture without raised dust; uniformly stirring to obtain a semi-finished product; uniformly feeding the semi-finished product into an edge runner mill, grinding and mixing the semi-finished product, and then feeding the semi-finished product into a ball press to be processed into pellets; and obtaining the finished product ball. The method of the invention can directly process the undersize powder of the rotary hearth furnace into the high-quality cold-pressed balls suitable for steel making and iron making, fully utilize resources, protect environment, save energy, avoid dust flying and waste water discharge, realize the full high value-added utilization of resources and achieve clean and high-efficiency production. The device has no dust, waste gas and waste water, and the product is environment-friendly and energy-saving.
Description
Technical Field
The invention relates to the technical field of rotary hearth furnace undersize powder ball pressing technology, in particular to a rotary hearth furnace undersize powder ball pressing method and device.
Background
At present, with the continuous development of national economy, the use amount of resources is also continuously increased. However, the storage amount of resources is limited, so that new technologies are necessary to continuously improve the utilization rate of resources, strive for limited resources, and create the maximum economic benefit.
In the production process of the steel industry, a large amount of sludge, smoke dust, iron scale and other iron-containing powder are generated concomitantly, and are increased in proportion and greatly along with the enlargement of the steel yield scale. The main component of the dust and mud is iron-containing raw material with iron content
How to effectively utilize the iron-containing resources to change the iron-containing resources into valuable is a problem generally concerned by current iron and steel production enterprises. Iron-containing dust and mud such as steel-making sludge and the like are randomly discharged in a large amount in the early stage, and the direct result is environmental pollution. With the advent of environmental protection measures and the need for recycling resources in various steel plants, steel enterprises are exploring the way to utilize iron-containing dust such as sludge, and some steel enterprises mix the iron-containing dust with fine iron powder to produce sinter r, but the yield and quality of sinter are reduced. Although the yield and the quality of the sintered ore are improved after the iron oxide scale is added, the sludge used for ore blending has low production added value and high energy consumption, the flow of the formed product is long, the utilization rate and the metal yield are low, the utilization value cannot be fully exerted, and great waste is caused. Moreover, the converter sludge is difficult to be uniformly mixed into mineral aggregate due to the fact that the sludge is too wet and agglomerated after being subjected to filter pressing by the treatment station; the dried powder becomes hard blocks and is difficult to be uniformly mixed into ores;the sludge is piled together in a centralized way, which not only occupies the field, but also becomes a pollution source of dust, which directly results in that the part of resources are not well utilized at present.
The common ball pressing technology needs to adopt a binder with high water content to ensure the bonding effect during mixing because the conventional ball pressing technology is not metered or the ingredients are not proper, and in order to reduce the excessive water, the conventional ball pressing technology needs to perform coupling reaction (more than 24 hours) to enter a ball pressing forming procedure, so that the process is complex, the flow is long, and a large amount of dust, waste gas and waste water are generated in the process, so that the production environment is seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a rotary hearth furnace undersize powder ball pressing method, which enables the rotary hearth furnace undersize powder to be directly processed into high-quality cold-pressed balls suitable for steel making and iron making, enables resources to be fully utilized, is environment-friendly and energy-saving, has no dust flying and no waste water discharge, realizes the full high value-added utilization of resources, and achieves clean and efficient production. The invention also provides a rotary hearth furnace sieve powder ball pressing device which is free of dust, waste gas and waste water, and the product is environment-friendly and energy-saving.
The technical purpose of the invention is realized by the following technical scheme: a method for pressing powder balls under a sieve of a rotary hearth furnace comprises the following steps:
s1, screening the metal balls and undersize powder after the reduction of the rotary hearth furnace, and conveying the undersize powder to a closed storage bin after metering;
s2, putting the undersize powder in the closed bin into a double-shaft stirrer according to the metering data, and sequentially adding a binder and water into the double-shaft stirrer to obtain a mixture without raised dust; wherein the binder comprises corn starch and konjac flour;
s3, uniformly stirring to obtain a semi-finished product;
s4, uniformly feeding the semi-finished product to an edge runner mill, and then sending the semi-finished product into a pellet press to be processed into pellets;
and S5, feeding the product into a finished product ball bin through a ball forming particle conveyor.
In one embodiment, in step S1, the screened requirements of the undersize of the rotary hearth furnace are: the granularity is less than 5 mm.
In one embodiment, the binder content of the mixture is 1.5% to 3.5% and the water content of the mixture is 2.5% to 9.5%.
In one embodiment, the ratio of the corn starch content to the konjac flour content in the binder is 9: 1.
In one embodiment, the adhesive is prepared by the following production process:
quantitatively weighing corn starch, adding water, mixing, puffing, crushing, adding konjac flour, and uniformly mixing to obtain a binder finished product.
In one embodiment, during the preparation of the binder, the pulverization is required to be more than 80 meshes; after puffing and crushing, the viscosity is more than 500 mPas.
In one embodiment, in the step S4, the pellet diameter pressed by the ball press is 20-50 mm.
The invention also provides a rotary hearth furnace undersize ball pressing device which comprises an undersize bin communicated with the bottom of the rotary hearth furnace, wherein the undersize bin is communicated with a feeding port of a closed bin through a closed plate link feeder and a closed box type elevator in sequence, the feeding port of the closed bin is also communicated with a binder bin and a water tank, a discharging port of the closed bin is communicated with a double-shaft stirrer, the double-shaft stirrer is connected with an edge runner mill, the edge runner mill is communicated with a ball pressing machine through a vibration feeding disc, and the ball pressing machine is communicated with a ball forming particle conveyor and a finished product ball bin in sequence.
In one embodiment, a metering conveyor is arranged on a pipeline of the adhesive bin communicated with the feeding port of the closed bin, and a metering pump is arranged on a pipeline of the water tank communicated with the feeding port of the closed bin.
In conclusion, the invention has the following beneficial effects:
1. the invention can directly process the undersize powder of the rotary hearth furnace into the high-quality cold-pressed balls suitable for steel making and iron making, fully utilizes resources, is environment-friendly and energy-saving, has no dust flying and no waste water discharge, realizes the full high value-added utilization of resources and achieves clean and high-efficiency production.
2. The device has reasonable connection and distribution, no dust, no waste gas and no waste water, and the product is environment-friendly and energy-saving. The strength of the finished ball can reach more than 1500N, and the finished ball can be used for steel making and iron making. The device can be connected with the existing monitoring system and automatic control system of a factory to realize full-automatic production.
Drawings
FIG. 1 is a schematic structural view of a powder ball pressing device under a screen of a rotary hearth furnace according to the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a closed plate link feeder;
FIG. 5 is a schematic view of a closed box elevator configuration;
fig. 6 is a schematic view of the structure of the edge runner mill.
In the figure: 1-rotary hearth furnace, 2-undersize bin, 3-closed plate-link feeder, 4-closed box elevator, 5-closed bin, 6-binder bin, 7-metering conveyor, 8-water tank, 9-metering pump, 10-double shaft mixer, 11-edge runner mill, 12-ball press, 13-balling conveyor, 14-finished ball bin, 15-bulking machine, 16-pulverizer, 17-grinder, 18-first metering bin, 19-second metering bin, 31-plate link, 32-chain wheel, 33-closed cavity, 34-sealed channel, 35-discharge outlet, 41-feeding slideway, 42-sealed cavity, 43-lifting plate link, 44-trough, 45-discharge guide outlet, 61-wheel disc, 62-pair roller.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
It should be noted that all the directional terms such as "upper" and "lower" referred to herein are used with respect to the view of the drawings, and are only for convenience of description, and should not be construed as limiting the technical solution.
A method for pressing powder balls under a sieve of a rotary hearth furnace comprises the following steps:
s1, screening the metal balls and undersize powder after the reduction of the rotary hearth furnace, and conveying the undersize powder to a closed storage bin after metering;
s2, putting the undersize powder in the closed bin into a double-shaft stirrer according to the metering data, and sequentially adding a binder and water into the double-shaft stirrer to obtain a mixture without raised dust; wherein the binder comprises corn starch and konjac flour;
s3, uniformly stirring to obtain a semi-finished product;
s4, uniformly feeding the semi-finished product to an edge runner mill, and then sending the semi-finished product into a pellet press to be processed into pellets;
and S5, feeding the product into a finished product ball bin through a ball forming particle conveyor.
The invention can directly process the undersize powder of the rotary hearth furnace into the high-quality cold-pressed balls suitable for steel making and iron making, fully utilizes resources, is environment-friendly and energy-saving, has no dust flying and no waste water discharge, realizes the full high value-added utilization of resources, achieves clean and efficient production, has the strength of finished balls of more than 1500N, and can be used for steel making and iron making.
In step S1, the screened requirements for the undersize of the rotary hearth furnace are: the granularity is less than 5 mm. The smaller granularity can facilitate subsequent processing, and the adhesive can obtain more sufficient adhesion. The binder content in the mixture is 2% -3.5%, and the water content in the mixture is 3% -5%. The content of the binder and the water content are proper, the binder mainly plays a role in binding during mixing, and the binder is bound on a ball press machine to cause difficulty in cleaning during subsequent ball pressing due to excessive binder; the content of water is not easy to be excessive, the water is used for increasing the viscosity of the adhesive, and the subsequent balling is also required to be dried, so the amount of water added cannot be excessive.
In the present embodiment, the binder is prepared by the following production process: quantitatively weighing corn starch, adding water, mixing, puffing, crushing, adding konjac flour, and uniformly mixing to obtain a binder finished product. The preparation of the adhesive needs to be puffed and crushed to achieve better adhesive effect, and the ratio of the content of the corn starch to the content of the konjac flour in the adhesive is 9: 1. In the preparation process of the binder, the grinding requirement is that the mesh number is larger than 80 meshes; after puffing and crushing, the viscosity is more than 500 mPas. The corn starch is puffed and crushed and then is combined with the konjac flour to be used as a binder. In step S4, the pellet diameter pressed by the ball press 12 is 20-50mm, and the ball press 12 is a double-roller ball press, which can form a relatively complete pressed powder ball and is not liable to cause dust and the like in excess powder to affect the working environment.
The invention firstly needs to prepare the binding agent, the proportion of the corn starch and the konjac flour is 9:1 for standby application by weighing, the corn starch is mixed with water, the water content is 3.5 percent of the total content of the corn starch and the konjac flour, the mesh number can reach about 100 meshes by puffing and crushing, the viscosity can be basically more than 500 mPa.s, and then the binding agent is uniformly mixed with the konjac flour, so that the finished product of the binding agent with relatively low water content can be obtained. The binder is then metered and mixed with the metered undersize powder and water, the total amount of the undersize powder to be mixed is taken as a standard, the proportion of the binder to the water is as shown in examples 1-3 in the following table 1, the mixture is uniformly stirred and sent to a ball press 12 to be processed into pellets, and the pellets are simply dried and further excess water is removed, so that finished balls can be obtained.
TABLE 1 results of testing the strength of finished balls of examples 1-3 and comparative examples 1-3
| Example (b) | Binder content (%) | Water content (%) | Strength of finished ball (N) |
| Example 1 | 1.5 | 9.5 | 1550 |
| Example 2 | 3.5 | 2.5 | 1560 |
| Example 3 | 3 | 6 | 1580 |
| Comparative example 1 | 6 | 3.5 | 900 |
| Comparative example 2 | 1 | 10 | 850 |
| Comparative example 3 | 4 | 2 | 780 |
It can be seen that the powder pressed balls prepared in comparative examples 1-3 generally have a compressive strength of only 800N, or a slightly better quality of 900N, while the compressive strength of the finished balls prepared by the method of the present invention can reach more than 1500N.
As shown in figure 1, the under-sieve powder ball pressing device of the rotary hearth furnace comprises an under-sieve powder bin 2 communicated with the bottom of the rotary hearth furnace 1, wherein the under-sieve powder bin 2 is communicated with a feeding port of a closed bin 5 sequentially through a closed plate link feeder 3 and a closed box type elevator 4, the feeding port of the closed bin 5 is also communicated with an adhesive bin 6 and a water tank 8, a discharging port of the closed bin 5 is communicated with a double-shaft stirrer 10, the double-shaft stirrer is connected with an edge runner mill 11, the edge runner mill 11 is communicated with a ball pressing machine 12 through a conveyor, and the ball pressing machine 12 is sequentially communicated with a ball forming particle conveyor 13 and a finished product ball bin 14. The device effectively realizes the method for pressing the powder balls under the screen of the rotary hearth furnace 1, the whole process is closed operation in the processes of conveying and running of all equipment, and the device can be connected with the existing monitoring system and the automatic control system of a factory to realize full-automatic production. The metering, mixing and ball pressing forming are completed in sequence after the undersize powder is fed, the undersize powder is metered by using the quantitative calculation of a lifting box of a closed plate-link feeder 3 and a closed box type lifter 4, the undersize powder is also metered by additionally using the conventional belt type metering or powder bag type metering in the conveying process, the undersize powder is fed into a double-shaft mixer 10 by a closed bin 5 to be mixed with adhesive and water, and then is fed into an edge runner mill 11, vertical or horizontal double-shaft mixing is arranged in the closed bin, so that the uniform mixing is ensured, meanwhile, the undersize powder is crushed to a certain extent between the double shafts, then the undersize powder is uniformly fed by a vibration feeding disc, the undersize powder is prevented from being accumulated by using the vibration effect, the subsequent ball pressing machine 12 is convenient to press finished balls, the finished balls are hermetically conveyed to a finished ball bin 14 one by one ball forming conveyor 13, and. The device has reasonable connection and distribution, no dust, no waste gas and no waste water, and the product is environment-friendly and energy-saving.
Referring to fig. 2, a small amount of undersize powder with a particle size of less than 5mm is formed in the balling process, a screen is arranged on the balling particle conveyor 13, and the undersize powder with a particle size of less than 5mm is sent to an undersize powder bin for further processing.
Referring to fig. 3, in this embodiment, the apparatus further includes a first measuring bin 18 for loading and measuring the corn starch and a second measuring bin 19 for loading and measuring the konjac flour, the first measuring bin 18 is communicated with the adhesive bin 6 sequentially through a bulking machine 15, a pulverizer 16 and a grinder 17, the bulking machine 15 is further communicated with the water tank 8, and the second measuring bin 19 is communicated with the adhesive bin 6. The device is also provided with real-time binder manufacturing equipment, and can manufacture the binder with corresponding amount in real time according to metering, so that the binder is prevented from being stored for too long and losing efficacy. In the process, the corn starch needs to be subjected to secondary crushing by the crusher 16 and the grinder 17 respectively, and then is better combined with the konjac flour, so that a binder finished product is formed. A metering conveyor 7 is arranged on a pipeline for communicating the binder bin 6 with the feeding port of the closed bin 5, and a metering pump 9 is arranged on a pipeline for communicating the water tank 8 with the feeding port of the closed bin 5. In the process of forming the mixture, the device respectively utilizes the metering conveyor 7 and the metering pump 9 to meter, so that the content of the caking agent and the water in the finished product ball is moderate, and because the two substances are both fluids, the metering is more accurate, and the quality of the finished product ball is prevented from being influenced. A screen is arranged between the undersize powder bin 2 and the bottom of the rotary hearth furnace 1 and is used for screening undersize powder with the granularity smaller than 5mm and then processing the powder pressed balls. The connection mode between each equipment in the device is closed connection, thereby effectively avoiding dust and the like from entering the working procedure to influence the measuring result in the process and the quality of the final finished ball.
Referring to fig. 4, the closed plate chain 31 feeder 3 comprises a plate chain 31 and chain wheels 32 located at two ends of the plate chain 31, a closed cavity 33 is arranged outside the plate chain 31 and the chain wheels 32, the closed cavity 33 is formed by connecting a plurality of closed plates in a seamless mode, a feeding hole is formed in one end of the closed cavity 33, a discharging hole 35 is formed in the other end of the closed cavity 33, a sealing channel 34 is arranged between the feeding hole and the undersize powder bin, and the feeding hole can be arranged to be cylindrical or square according to the shape of the feeding hole.
Referring to fig. 5, the closed box type elevator 4 includes an inclined feeding chute 41 connected to the discharge port 35 of the feeder 3 of the closed plate link chain 31, the feeding chute 41 is disposed on a sealed cavity 42, a longitudinal lifting plate link chain 43 is disposed in the longitudinally disposed sealed cavity 42, a U-shaped chute 44 is disposed on the lifting plate link chain 43, the material falls into the chute 44 and is lifted to a high position by the chute 44, and a discharge guide port 45 is disposed on the wall of the sealed cavity 42 opposite to the feeding chute 41, so that the material can be guided into the discharge guide port 45 when moving downward after being lifted to the highest position, and the discharge guide port 45 is adjacent to the chute 44 running to the highest position.
Referring to fig. 6, the edge runner mill 11 includes a wheel disc 61, a feed opening is provided at the top of the wheel disc 61, a pair of rollers 62 are provided at two corresponding sides in the wheel disc 61, and the material falls between the pair of rollers 62 and is crushed.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. A method for pressing powder balls under a screen of a rotary hearth furnace is characterized by comprising the following steps:
s1, screening the metal balls and undersize powder after the reduction of the rotary hearth furnace, and conveying the undersize powder to a closed storage bin after metering;
s2, putting the undersize powder in the closed bin into a double-shaft stirrer according to the metering data, and sequentially adding a binder and water into the double-shaft stirrer to obtain a mixture without raised dust; wherein the binder comprises corn starch and konjac flour;
s3, uniformly stirring to obtain a semi-finished product;
s4, uniformly feeding the semi-finished product into an edge runner mill for edge runner milling, and then sending the semi-finished product into a pellet press for processing into pellets;
and S5, feeding the product into a finished product ball bin through a ball forming particle conveyor.
2. The method for briquetting fine powder under a rotary hearth furnace according to claim 1, wherein in said step S1, the screened fine powder under a rotary hearth furnace is required to: the granularity is less than 5 mm.
3. The rotary hearth furnace undersize powder pelletizing method according to claim 2, characterized in that the binder content in the mixture is 1.5% to 3.5%, and the water content in the mixture is 2.5% to 9.5%.
4. The rotary hearth furnace undersize powder pelletizing method according to claim 3, characterized in that a ratio of the corn starch content to the konjac flour content in the binder is 9: 1.
5. The method for pressing powder balls under a sieve of a rotary hearth furnace according to claim 4, wherein the binder is prepared by the following production process:
quantitatively weighing corn starch, adding water, mixing, puffing, crushing, adding konjac flour, and uniformly mixing to obtain a binder finished product.
6. The method for pulverizing undersize powder pellets of a rotary hearth furnace according to claim 5, wherein in the preparation of said binder, pulverization is required to be larger than 80 mesh; after puffing and crushing, the viscosity is more than 500 mPas.
7. The method for pressing the undersize pellets of the rotary hearth furnace according to any one of claims 1 to 6, wherein the pellets pressed by the pellet press in the step S4 have a diameter of 20 to 50 mm.
8. The utility model provides a rotary hearth furnace undersize presses football shirt to put, its characterized in that includes undersize storehouse (2) that is linked together with rotary hearth furnace (1) bottom, undersize storehouse (2) loop through closed plate link feeder (3) and closed box lifting machine (4) and are linked together with the pan feeding mouth of closed feed bin (5), the pan feeding mouth of closed feed bin (5) still communicates binder storehouse (6) and water tank (8), the discharge gate intercommunication biax mixer (10) of closed feed bin (5), biax mixer (10) are associative with edge runner mill (11), edge runner mill (11) are linked together with ball-pressing machine (12) through vibration feeding dish (7), ball-pressing machine (12) communicate in proper order has balling granule conveyer (13) and finished product ball storehouse (14).
9. The undersize powder ball pressing device of the rotary hearth furnace according to claim 8, further comprising a binder bin (6), wherein a metering conveyor (7) is arranged on a pipeline communicated with the feeding port of the closed bin (5), and a metering pump (9) is arranged on a pipeline communicated with the feeding port of the closed bin (5) and the water tank (8).
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| CN202011219309.1A CN112280975A (en) | 2020-11-04 | 2020-11-04 | Method and device for pressing powder balls under screen of rotary hearth furnace |
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| CN202011219309.1A CN112280975A (en) | 2020-11-04 | 2020-11-04 | Method and device for pressing powder balls under screen of rotary hearth furnace |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113117865A (en) * | 2021-05-07 | 2021-07-16 | 新疆吉泰低阶煤利用研究有限责任公司 | Equipment and process for preparing soil conditioner from fly ash |
| CN113186392A (en) * | 2021-04-02 | 2021-07-30 | 首钢京唐钢铁联合有限责任公司 | Pelletizing method for realizing efficient utilization of metallurgical solid wastes |
| CN113416815A (en) * | 2021-06-18 | 2021-09-21 | 江苏润美新材料有限公司 | Synthetic slag for aluminum killed steel direct slag-feeding washing desulfurization process and production process and equipment thereof |
| CN113981216A (en) * | 2021-10-21 | 2022-01-28 | 广东华欣环保科技有限公司 | Method for treating undersize powder of metallized pellet of rotary hearth furnace |
| CN114950653A (en) * | 2022-04-12 | 2022-08-30 | 湖南领头雁矿业科技有限责任公司 | Grinding medium adding system |
| CN115430685A (en) * | 2022-08-18 | 2022-12-06 | 威尔登环保设备（长沙）有限公司 | Dust ball pressing system |
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| CN113186392A (en) * | 2021-04-02 | 2021-07-30 | 首钢京唐钢铁联合有限责任公司 | Pelletizing method for realizing efficient utilization of metallurgical solid wastes |
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| CN113416815A (en) * | 2021-06-18 | 2021-09-21 | 江苏润美新材料有限公司 | Synthetic slag for aluminum killed steel direct slag-feeding washing desulfurization process and production process and equipment thereof |
| CN113981216A (en) * | 2021-10-21 | 2022-01-28 | 广东华欣环保科技有限公司 | Method for treating undersize powder of metallized pellet of rotary hearth furnace |
| CN113981216B (en) * | 2021-10-21 | 2023-02-28 | 广东华欣环保科技有限公司 | Treatment method of undersize powder of metallized pellet of rotary hearth furnace |
| CN114950653A (en) * | 2022-04-12 | 2022-08-30 | 湖南领头雁矿业科技有限责任公司 | Grinding medium adding system |
| CN115430685A (en) * | 2022-08-18 | 2022-12-06 | 威尔登环保设备（长沙）有限公司 | Dust ball pressing system |
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