CN117490364B - Dry material heating device and heating method based on raw material conduction - Google Patents
Dry material heating device and heating method based on raw material conduction Download PDFInfo
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- CN117490364B CN117490364B CN202410004125.5A CN202410004125A CN117490364B CN 117490364 B CN117490364 B CN 117490364B CN 202410004125 A CN202410004125 A CN 202410004125A CN 117490364 B CN117490364 B CN 117490364B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 141
- 239000000463 material Substances 0.000 title claims abstract description 103
- 239000002994 raw material Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 239000002245 particle Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000011331 needle coke Substances 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 29
- 238000004898 kneading Methods 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 239000010439 graphite Substances 0.000 abstract description 6
- 229910002804 graphite Inorganic materials 0.000 abstract description 6
- 230000033764 rhythmic process Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 1
- 238000004939 coking Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 241000284466 Antarctothoa delta Species 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 239000011300 coal pitch Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
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Abstract
The invention discloses a dry material heating device and a heating method based on raw material conduction, and relates to the technical field of graphite electrode joint production; the method comprises the following steps: step 1, firstly mixing roasting crushed materials with the particle size of 0.5-2mm and the mass percentage of 60-80% with needle coke with the particle size of 0.5-2mm and the mass percentage of 20-40%, and then putting the mixture into a heating area of a dry material heating device; step 2, controlling a current switch of a power supply system of the dry material heating device to be switched on; step 3, setting curve parameters of three stages of power transmission according to the material mixing process and the total weight of the dry materials of 1.2-1.4 t; after 13-15min, the target set temperature is reached to 150-170 ℃; and step 4, after the dry material heating device heats to reach the set temperature, the current switch is opened. The equipment is stable to operate and overcurrent faults can not occur while the heating speed is ensured; meets the production rhythm requirement of our factory.
Description
Technical Field
The invention relates to the technical field of graphite electrode joint production, in particular to a dry material heating device and a heating method based on raw material conduction.
Background
The traditional carbon products such as graphite electrodes and the like generally adopt coke as aggregate and coal pitch as binder, a small amount of additives such as ferric oxide powder and the like are added into part of the products, and the main products comprise the graphite electrodes and graphite electrode joints, and finally the products are formed through the production procedures of kneading, profiling, roasting, dipping, graphitization and the like. The main technical parameters of kneading include kneading temperature and kneading time, the kneading temperature is generally controlled in a certain temperature range according to the type of the produced product and the property of the asphalt, and the kneading time is greatly different according to different equipment. Conventionally, coke and additives of various grades before kneading are collectively called dry materials, and coal pitch is called oil because it is in a liquid state at high temperature. In order to accelerate the production rhythm and improve the kneading quality, the dry materials are required to be heated to a certain temperature and kneaded with asphalt. Heating is typically performed using a dry-feed heating device.
There are two heating modes for domestic production of graphite electrode joints, one is that heat conduction oil is heated in a dry material heating device, and then dry materials are turned in a barrel to be in contact heat transfer with the barrel wall; the other is to heat the material by using the conductivity of the material as a resistor, and to heat the material at rest without moving parts. Compared with the first heating mode, the second electric heating dry material heating mode has higher equipment stability and lower maintenance rate. However, when the second heating mode is used, the raw material production process formulas of the factories are different, and the calcining temperature is also different, so that the powder resistivity is greatly changed, and therefore, the second used dry material heating device lacks a corresponding power supply heating data support.
The dry material heating device has maximum current limit, and if various heating parameters cannot be adjusted, overcurrent faults occur in the heating process, and the equipment is stopped. Further, the heating and adding process cannot be completed, and the production progress is affected. The existing dry material heating device adopts a constant heating method, and the heating method has the problem of overlong heating time, and the heating time generally needs more than 60 minutes or even longer; the heating stage of the dry material slows down the overall production progress.
Therefore, based on the above situation, how to ensure the stable operation of the equipment while meeting the heating efficiency within the capacity range of the dry material heating device in the second electric heating mode is the main overcoming direction.
Disclosure of Invention
According to the defects of the prior art, the invention provides a dry material heating device and a heating method based on raw material conduction, and the device can be used for preheating the finished dry material; the heating method based on the device can set a constant current control three-section curve control mode for heating according to the characteristics of raw materials, so that heating is completed within a certain time and data of a power supply curve are formed, and according to the data, the equipment for heating the drier in a factory can be ensured to stably operate under the condition and reach the required temperature within 13-15 minutes.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
a dry material heating method based on raw material conduction comprises the following heating steps:
step 1, firstly, mixing roasting crushed materials with the particle size of 0.5-2mm and the mass percentage of 60-80% with needle coke with the particle size of 0.5-2mm and the mass percentage of 20-40%, forming dry materials after mixing, and putting the dry materials into a heating area of a dry material heating device; and controlling the current switch of the dry material heating device to be switched on to supply power for the equipment. Step 2, according to a calculation formula: calculating required electric quantity E by Q=m.c. delta.t, controlling a rectifier unit to start working according to three steps of power transmission, adjusting a trigger angle of a silicon controlled rectifier, and outputting required working current; wherein, when the total weight of the dry material is 1.2 t-1.4 t, the electric quantity E=Q/3600=m.c. delta t/3600; q: the raw materials to be heated need heat for heating; m is the mass kg of the raw materials to be heated; c: specific heat kJ/(kg. Deg.C); Δt: a temperature difference; Δt: =ts-tl; ts: setting the heating temperature of the raw materials to be heated; tl: the raw material storage temperature; step 3, setting three phase curve parameters of power transmission according to the batching process and the power transmission: first stage of power transmission: controlling the power of the dry material heating device to be 350-450kw, the consumed electric quantity E1 to be 15% E, the current 20000A and the power transmission time to be 2-3min; and a power transmission second stage: the power is 300-350 kw, the electricity consumption E2 is 77% E, and the current is 15000A. The power transmission time is 9-12min; third stage of power transmission: the power is 150-250 kw, the consumed electric quantity E3 is 8%E, and the current is 5000A; the power transmission time is 2-3min; after 13-15min, the target set temperature is reached to 150-170 ℃; and step 4, after the dry material heating device heats the dry material to the set temperature, the current switch is opened.
The dry material heating device based on raw material conduction comprises three layers of cylinders sleeved together, wherein each three layers of cylinders comprise an outer cylinder, a middle cylinder and an inner cylinder; the top of the outer cylinder is provided with a stainless steel cover, and the bottom side wall of the outer cylinder is connected with an outer cylinder cathode copper bus; the top of the middle cylinder is connected with a middle cylinder anode copper bus; the top side wall of the inner cylinder is connected with an inner cylinder cathode copper bus; the middle cylinder anode copper bus and the inner cylinder cathode copper bus penetrate out from the stainless steel cover. The inner cylinder cathode copper bus and the outer cylinder cathode copper bus are connected with the power supply negative electrode, the middle cylinder anode copper bus is connected with the power supply positive electrode, and the dry materials enter a heating zone of the dry material heating device; the heating zone is positioned in an interlayer space between the middle cylinder and the outer cylinder and between the middle cylinder and the inner cylinder of the dry material heating device.
Preferably, the top of the outer cylinder is sleeved with a top cover; the top cover is provided with a feed inlet; the side wall of the outer cylinder is inserted with a thermometer.
The beneficial effects of the invention are as follows:
1. the heating data of the three stages of the method can meet the heating work of the total weight of the dry materials in the burdening process within the range of 1.2 t-1.4 t. The original heating time length of 81 minutes is reduced to 15 minutes, the heating speed is relatively higher, meanwhile, the equipment is stable in operation, and no overcurrent fault occurs. 2. The stability of the product quality in the heating process is ensured, and the coking problem caused by constant heating is avoided. 3. Meets the requirement of uninterrupted production of dry material.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a view showing an internal structure of a heating apparatus according to the present invention.
Fig. 2 is a diagram of a power supply system of the heating device of the present invention.
In the figure, an outer cylinder cathode copper bus 1, an outer cylinder 2, a middle cylinder 3, an inner cylinder 4, a stainless steel cover 5, a middle cylinder anode copper bus 6 and an inner cylinder cathode copper bus 7 are shown.
Detailed Description
Example 1:
as shown in figure 1, the dry material heating device based on raw material conduction mainly comprises three layers of cylinders sleeved together, and the cylinders are fixed through connecting pieces; the three-layer cylinder body comprises three layers of cylinder walls of an outer cylinder 2, a middle cylinder 3 and an inner cylinder 4; the top of the outer cylinder 2 is provided with a stainless steel cover, and the side wall of the bottom of the outer cylinder 2 is connected with an outer cylinder cathode copper bus 1; the top of the middle cylinder 3 is connected with a middle cylinder anode copper bus 2; the top side wall of the inner cylinder 4 is connected with an inner cylinder cathode copper bus 7; the middle cylinder anode copper bus 2 and the inner cylinder cathode copper bus 7 penetrate out of the stainless steel cover 5. The electric conductivity of the raw material is utilized, and the raw material is used as a resistor for heating. The cathode copper bus of the inner cylinder 4 and the outer cylinder 2 is connected with the negative electrode of the power supply, the anode copper bus of the middle cylinder 3 is connected with the positive electrode of the power supply, and the dry materials enter the heating zone of the dry material heating device, and the heating zone is positioned in the interlayer space between the middle cylinder 3 and the outer cylinder 2 of the dry material heating device and between the middle cylinder 3 and the inner cylinder 4. The loading capacity of the dry material heating device is 1.4t, and the dry material filling accounts for 80 percent. As shown in fig. 2, the dry material heating device is provided with a power supply system, the power supply system comprises a high-voltage cabinet, a transformer, a rectifying cabinet and a current switch, a 10kv incoming cable enters the high-voltage cabinet, a circuit breaker is arranged in an access cabinet, the high-voltage cabinet is provided with a switch and a protection device, and a 10kv load line is connected to a high-voltage side line end of the transformer from a circuit breaker line outlet end. The low-voltage output of the transformer is connected with the inlet wire end of the rectifier cabinet through the voltage reduction of the transformer; the direct current positive and negative output buses of the rectifier cabinet are connected with the current switch; the direct current positive and negative output buses of the current switch are respectively connected with the positive and negative poles of the dry material heating device (the copper bus of the anode of the inner cylinder is the positive pole, and the copper bus 1 of the cathode of the outer cylinder and the copper bus 7 of the cathode of the inner cylinder are the negative poles).
Example 2:
a dry material heating method based on raw material conduction comprises the following heating steps:
step 1, firstly, mixing roasting crushed materials with the particle size of 1mm and the mass of 980kg with needle coke with the particle size of 1mm and the mass of 420kg, forming dry materials after mixing, and putting the dry materials into a heating zone of a dry material heating device; and controlling the current switch of the dry material heating device to be switched on to supply power for the equipment. Step 2, according to a calculation formula: (Q=m.c.) delta t, calculating required electric quantity, controlling the rectifier unit to start working according to three phases of power transmission, adjusting the trigger angle of the silicon controlled rectifier, and outputting required working current; the total weight of the dry material was 1.4t. Wherein, the electrical quantity e=q/3600=m.c. Δt/3600Q: the raw materials to be heated need heat for heating; m is the mass kg of the raw materials to be heated; c: specific heat kJ/(kg. Deg.C); Δt: a temperature difference; Δt: =ts-tl; ts: setting the heating temperature of the raw materials to be heated; tl: raw material storage temperature. 1kwh is powered by 1 degree, 3600KJ heat is generated by each degree of power, and E is calculated by Q=3600 KJ.E; e: the required electric quantity; specific heat c: taking 0.98, wherein the mass of the raw materials is 1400kg, and the temperature difference is 170 ℃ -28 ℃ =142 ℃. And carrying out formula calculation according to the data. Q=1400×0.98×170-28= 194824 KJ; and then according to q=3600 kj·e; the calculated electrical quantity E is about 54.12kwh. Step 3, setting three power transmission stage curve parameters according to the batching process and the required electric quantity:
first stage of power transmission: the power of the dry material heating device is controlled to be 450kw, the consumed electric quantity E1 is about 8.12kwh, the current 20000A is used for 3min; and a power transmission second stage: the power was 300kw, the power consumption E2 was about 41.7kwh, and the current was 15000A. Power transmission time is 9min; third stage of power transmission: the power is 200kw, the consumed electric quantity E3 is about 4.3kwh, and the current is 5000A; the power transmission time is 3min; after 15min the target set temperature of 170℃was reached. And step 4, heating the dry material by a heating device to 170 ℃ and opening the switch by a current switch.
Example 3:
step 1, firstly mixing roasting crushed materials with the particle size of 2mm and the mass of 960kg with needle coke with the particle size of 2mm and the mass of 240kg to form dry materials, and putting the dry materials into a heating zone of a dry material heating device; and controlling the current switch of the dry material heating device to be switched on to supply power for the equipment. Step 2, according to a calculation formula: (Q=m.c.) delta t, calculating required electric quantity, controlling the rectifier unit to start working according to three phases of power transmission, adjusting the trigger angle of the silicon controlled rectifier, and outputting required working current; the total weight of the dry material is 1.2t. Wherein, the electrical quantity e=q/3600=m.c. Δt/3600; specific heat c: 0.98, the mass of the raw materials is 1200kg, and the temperature difference is 150 ℃ -20 ℃ =130 ℃; and carrying out formula calculation according to the data. Q=1200×0.98×150-20= 152880 KJ; and then according to q=3600 kj·e; the calculated electrical quantity E is approximately equal to 42.47kwh. Step 3, setting three power transmission stage curve parameters according to the batching process and the required electric quantity:
first stage of power transmission: the power of the dry material heating device is controlled to be 350kw, the consumed electric quantity E1 is about 6.37kwh, the current 20000A is used for 3min; and a power transmission second stage: the power was 300kw, the power consumption E2 was about 32.7kwh, and the current was 15000A. Power transmission time is 9min; third stage of power transmission: the power is 150 kw, the consumed electric quantity E3 is about 3.4kwh, and the current is 5000A; the power transmission time is 3min; after 15min the target set temperature was reached 160 ℃. And step 4, heating the dry material by a heating device to 160 ℃ and opening the switch by a current switch.
Example 4:
step 1, firstly, mixing roasting crushed materials with the particle size of 0.5mm and the mass of 780kg with needle coke with the particle size of 0.5mm and the mass of 520kg, forming dry materials after mixing, and putting the dry materials into a heating area of a dry material heating device; and controlling the current switch of the dry material heating device to be switched on to supply power for the equipment. Step 2, according to a calculation formula: (Q=m.c.) delta t, calculating required electric quantity, controlling the rectifier unit to start working according to three phases of power transmission, adjusting the trigger angle of the silicon controlled rectifier, and outputting required working current; the total weight of the dry material is 1.3t. Wherein, the electrical quantity e=q/3600=m.c. Δt/3600; specific heat c: 0.98, the mass of the raw materials is 1300kg, and the temperature difference is 160 ℃ -25 ℃ =135 ℃; carrying out formula calculation according to the data; q=1300×0.98× (160-25) = 171990 KJ; and then according to q=3600 kj·e; the calculated electrical quantity E is approximately equal to 47.78kwh. Step 3, setting three power transmission stage curve parameters according to the batching process and the required electric quantity: first stage of power transmission: the power of the dry material heating device is controlled to be 300kw, the consumed electric quantity E1 is about 7.17kwh, the current 20000A is used for 3min; and a power transmission second stage: the power was 300kw, the power consumption E2 was about 36.79kwh, and the current was 15000A. Power transmission time is 9min; third stage of power transmission: the power is 150 kw, the consumed electric quantity E3 is about 3.82kwh, and the current is 5000A; the power transmission time is 3min; after 15min the target set temperature was reached 150 ℃. And step 4, heating the dry material by a heating device to the temperature of 150 ℃ and opening the switch by a current switch.
Example 5:
to compare the reduction in heating time, the following comparison test was designed:
taking example 2 as an experimental group, the heating time of the dry material is 15 minutes; the control group used the dry material heating apparatus of example 1 and the dry material of example 2, and heated the dry material at a constant current of 12000 and A, and the heating process data were as follows:
heating data table of raw dry material heating device
Data results: the rectifier output current range 12000A, the heating time is longer, 81 minutes is spent, and the time can not meet the production requirement. Therefore, the heating time of the dry material can be obviously shortened, and the heating time is shortened by 81% from 81 minutes to 15 minutes under the condition of constant current.
Example 5:
in order to reasonably select the combination of three-stage parameter control, heating processes with different parameter settings are performed in the dry material heating device in the embodiment 1 so as to select proper parameter combinations, and the specific reference is shown in the table 1; the safety conditions of each stage of the heating process are shown in Table 2.
Table 1 combinations of parameters
| Curve segment | Power kw | Heating time (min) | Actual voltage V | Actual current I |
| 1 | 600 | 2 | 21 | 25737 |
| 2 | 550 | 1 | 20.3 | 24503 |
| 3 | 500 | 2 | 19.2 | 23432 |
| 4 | 450 | 4 | 16 | 21775 |
| 5 | 350 | 1 | 13.5 | 18467 |
| 6 | 300 | 1 | 10.4 | 14298 |
| 7 | 150 | 1 | 6 | 8210 |
TABLE 2 failure alarm conditions during operation of each heating stage
In combination with tables 1 and 2 and actual production requirements, when the data is selected, the voltage data cannot be directly selected to be the lowest or the highest, and parameters between sixty percent and eighty percent are selected, so that experimental adjustment of the equipment is ensured under the condition of relative safety; the transformer is in ten three gears, the transformer selects the tenth gear, and the voltage and current change condition is observed according to the relative decrease of the power of the equipment. In practical production, since the rectifying cabinet is frequently adjusted, the stability of the power system and the safe operation of the power equipment are not facilitated, and certain potential safety hazards exist, each curve stage needs to be reasonably set, and the electric power equipment is rapidly heated on the premise of ensuring stability.
According to the experiment, the curve segment 1 exceeds the maximum current 25000A of the dry material heating device equipment in the factory, and the equipment stability cannot be ensured; in the case of a dry matter heating apparatus facility maximum current 25000A in my mill, heating data curve segment 2 is selected to be near the limit. The curve segment 4-5 was used to power 450kwh in the first stage as determined by the experimental table. The device is controlled to be in the range of 350-450kw at the highest, the rapid temperature rise is not influenced, and meanwhile, the device is relatively stable to operate. Therefore, the 4-5 curve segment is used as the first stage, and the purpose of rapid temperature rise is achieved. The 4-5 curve section is used as the first stage heating for a long time until the heating is finished, the dry material has the coking problem, the coking can cause difficult discharging, and the non-conduction of the dry material in the equipment can cause the short circuit problem. The first stage controls the rapid heating time to be 2-3min; the second stage also needs to be designed.
The curve section 6 is selected in the second stage, so that the equipment can stably run for a long time, but the residual electric quantity cannot be supported until the heating is finished. If heating is done directly as two stages, curve segment 7 is selected, and heating curve segment 7 as the second stage results in an extended heating time. The third phase needs to be further designed when selecting curve segment 6 as the second phase. According to the residual electric quantity, the actual current below 8000A is selected to the third stage, and the 5000A is verified to be capable of completely consuming the electric quantity, and the residual electric quantity is heated to the raw material in a specified time, so that the electric quantity can be fully used. And in the curve segment of the third stage, the residual electric quantity is completely consumed.
On the whole, carry out the drier heating with three-section heating methods, under the prerequisite that satisfies the heating demand, the production operation is more stable, and the security is reliable, and the heating duration is shorter relatively.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. A dry material heating method based on raw material conduction is characterized in that: the specific heating steps of the heating method are as follows:
step 1, firstly, mixing roasting crushed materials with the particle size of 0.5-2mm and the mass percentage of 60-80% with needle coke with the particle size of 0.5-2mm and the mass percentage of 20-40%, forming dry materials after mixing, and putting the dry materials into a heating area of a dry material heating device; the current switch of the dry material heating device is controlled to be switched on to supply power for the equipment;
step 2, according to a calculation formula: calculating electric quantity E by Q=m.c., controlling a rectifier unit to start working according to three phases of power transmission, adjusting a trigger angle of a silicon controlled rectifier, and outputting required working current; wherein, when the total weight of the dry material is 1.2 t-1.4 t, the electric quantity E=Q/3600=m.c. Deltat/3600, wherein:
q: the heat required by heating the raw materials to be heated
m is the mass kg of the raw materials to be heated
c: specific heat kJ/(kg. Degree C.)
Δt: temperature difference (. Degree. C.)
△t：=ts-tl
ts: the raw material to be heated is set to a heating temperature (DEG C)
tl: raw material storage temperature (. Degree. C.)
Step 3, setting three phase curve parameters of power transmission according to the batching process and the required electric quantity E:
first stage of power transmission: controlling the power of the dry material heating device to be 350-450kw, the consumed electric quantity E1 to be 15% E, the current 20000A and the power transmission time to be 2-3min;
and a power transmission second stage: the power is 300-350 kw, the consumed electric quantity E2 is 77 percent E, the current is 15000A, and the power transmission time is 9-12min;
third stage of power transmission: the power is 150-250 kw, the consumed electric quantity E3 is 8%E, and the current is 5000A; the power transmission time is 2-3min; after 13-15min, the target set temperature is reached to 150-170 ℃;
and step 4, after the dry material heating device heats the dry material to the set temperature, the current switch is opened.
2. The method for heating dry materials based on raw material conduction according to claim 1, wherein: after the step 4 is completed, the heated dry materials in the dry material heating device are discharged outside through the discharge hole and discharged into a kneading pot in the next working procedure; discharging time is 3-4min, and discharging temperature is 150-170 ℃.
3. A dry material heating apparatus using the heating method according to claim 1, characterized in that: the dry material heating device comprises three layers of cylinders sleeved together, wherein the three layers of cylinders comprise an outer cylinder, a middle cylinder and an inner cylinder; the top of the outer cylinder is provided with a stainless steel cover, and the bottom side wall of the outer cylinder is connected with an outer cylinder cathode copper bus; the top of the middle cylinder is connected with a middle cylinder anode copper bus; the top side wall of the inner cylinder is connected with an inner cylinder cathode copper bus; the middle cylinder anode copper bus and the inner cylinder cathode copper bus penetrate out from the stainless steel cover; the inner cylinder cathode copper bus and the outer cylinder cathode copper bus are connected with the power supply negative electrode, the middle cylinder anode copper bus is connected with the power supply positive electrode, and the dry materials enter a heating zone of the dry material heating device; the heating zone is positioned in an interlayer space between the middle cylinder and the outer cylinder and between the middle cylinder and the inner cylinder of the dry material heating device.
4. A dry material heating apparatus as claimed in claim 3, wherein: a top cover is sleeved on the top of the outer cylinder; the top cover is provided with a feed inlet; the side wall of the outer cylinder is inserted with a thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410004125.5A CN117490364B (en) | 2024-01-03 | 2024-01-03 | Dry material heating device and heating method based on raw material conduction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410004125.5A CN117490364B (en) | 2024-01-03 | 2024-01-03 | Dry material heating device and heating method based on raw material conduction |
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| Publication Number | Publication Date |
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| CN117490364A CN117490364A (en) | 2024-02-02 |
| CN117490364B true CN117490364B (en) | 2024-03-12 |
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| CN202410004125.5A Active CN117490364B (en) | 2024-01-03 | 2024-01-03 | Dry material heating device and heating method based on raw material conduction |
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| SU1312074A2 (en) * | 1985-12-18 | 1987-05-23 | Днепровский Электродный Завод Им.50-Летия Советской Украины | Method for controlling graphitization process |
| CN1095545A (en) * | 1993-02-12 | 1994-11-23 | 古斯塔夫·爱利希机器制造厂 | Be used for method and apparatus to continuous supply of heat in electrically conductive bulk goods |
| CN102363525A (en) * | 2011-07-01 | 2012-02-29 | 中平能化集团开封炭素有限公司 | Dry material heater |
| CN104965538A (en) * | 2015-07-06 | 2015-10-07 | 王军 | Crystal growth process heating power supply control method |
| CN207491234U (en) * | 2017-10-25 | 2018-06-12 | 山西三元炭素有限责任公司 | A kind of siccative electric heater unit |
| CN116951982A (en) * | 2023-07-28 | 2023-10-27 | 鄯善隆盛碳素制造有限公司 | Electrode graphitization power transmission curve optimization method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1312074A2 (en) * | 1985-12-18 | 1987-05-23 | Днепровский Электродный Завод Им.50-Летия Советской Украины | Method for controlling graphitization process |
| CN1095545A (en) * | 1993-02-12 | 1994-11-23 | 古斯塔夫·爱利希机器制造厂 | Be used for method and apparatus to continuous supply of heat in electrically conductive bulk goods |
| CN102363525A (en) * | 2011-07-01 | 2012-02-29 | 中平能化集团开封炭素有限公司 | Dry material heater |
| CN104965538A (en) * | 2015-07-06 | 2015-10-07 | 王军 | Crystal growth process heating power supply control method |
| CN207491234U (en) * | 2017-10-25 | 2018-06-12 | 山西三元炭素有限责任公司 | A kind of siccative electric heater unit |
| CN116951982A (en) * | 2023-07-28 | 2023-10-27 | 鄯善隆盛碳素制造有限公司 | Electrode graphitization power transmission curve optimization method |
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