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Zhengzhou Ansheng Scientific Instrument Co., Ltd
Chongqing Box type Resistance Furnace (Where to Sell)
NegotiableUpdate on 06/04
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Overview
Chongqing box type resistance furnace (where to sell it) is a universal heating equipment. According to their appearance, they can be divided into box furnaces, tube furnaces, crucible furnaces, etc. Muffle furnace is translated from English as Muffle furnace. Muffle means package, furnace means stove, and melting pot means furnace. The common names for muffle furnaces in China are as follows: electric furnace, resistance furnace, Maofu furnace, and muffle furnace. Muffle furnace is generally a high-temperature furnace provided for laboratories, with different names. The products referred to are of the same category and are collectively referred to.
Product Details
Chongqing Box type Resistance Furnace (Where to Sell) Ash Testing Process
How to measure coal ash content, ceramic fiber muffle furnace. What factors affect the ash content measurement of coal, and what precautions should be taken when using a muffle furnace.
1、 Why is the ash content of coal measured? Because it has the following importance:
When calculating the calorific value of coal, the ash content index of coal is required.
Ash content is the main indicator for coal trade pricing.
In the coal washing process, ash content is an indicator for evaluating the quality and washing efficiency of refined coal.
During boiler combustion, the thermal efficiency of the boiler is calculated based on ash content, taking into account factors such as slag discharge workload.
5. Inherent elements in coal must be determined in coal quality analysis to reflect coal quality.
2、 Why is it used to determine the ash content of coal
The muffle furnace is designed for the determination of coal ash content. The combination of muffle furnace and temperature controller enables rapid and integrated measurement of coal ash content for coal sintering, heating, thermal analysis, and heat treatment. The new ceramic fiber high-efficiency intelligent integrated muffle furnace is more efficient, fast, and energy-saving!
3、 Factors affecting the measurement error of coal ash content and how to reduce experimental error:
1. The amount of fixed sulfur in the ash and the degree of decomposition of mainly calcite carbonate. Using slow ashing method to oxidize and discharge sulfides in coal before carbonate decomposition, avoiding the formation of calcium sulfate;
2. Weighing of coal samples. When weighing samples, accuracy and speed should be achieved, and the sample size should comply with the specifications, not too little or too much. Insufficient sample size can lead to a decrease in sample representativeness, while excessive sample size can result in thick coal samples spread flat at the bottom of the ash pan, making it difficult to burn through and resulting in higher ash content measurements.
3. Control the heating rate and temperature residence time of the muffle furnace. The initial heating time is reflected in the fact that the heating rate has a significant impact on the accuracy of ash content determination. The shorter the heating time, the faster the rate, and the higher the measured ash content; The longer the time, the closer the measured ash content is to the standard value. Therefore, before the experiment, pyrite should be oxidized and carbonate should be decomposed.
4. Water absorption of coal sample residue after ashing in muffle furnace. The longer the ash residue is left in the air, the more water it absorbs from the air, resulting in higher accuracy. Therefore, before the experiment, it is necessary to ensure that the environment is stable and meets the standards. After removing the coal ash, it should not be left outside for too long.
Specification parameters:
model |
AS-1400 |
Temperature parameters |
1400℃ |
Voltage AC |
220V/380V |
rated temperature |
1400℃ |
Long term working temperature |
1350℃ |
Uniformity of temperature field inside the furnace |
±5℃ (depending on the size of the heating chamber) |
Temperature measuring components and temperature measuring range |
Platinum rhodium platinum S temperature measurement range 0-1700 ℃ |
Program curve segment |
30 paragraphs |
heating rate |
1 ℃/h-40 ℃/min, recommended 20 ℃/min |
Heating element |
Elema |
Thermal insulation material |
Imported high-purity alumina fiberboard |
Cooling method |
Double layered furnace shell, air-cooled |
Furnace body temperature |
≤ 50 degrees |
Warranty scope and duration |
The electric furnace comes with a one-year free warranty, and the heating element is not covered by the warranty (natural damage within three months can be replaced free of charge) |
Customer selection |
1. Crucible, box bowl, corundum furnace pad/silicon carbide pad 2. RS485 communication, computer control software and hardware 3. Touch screen controlled temperature controller 4. Paperless recorder 5. Increase exhaust ports 6. Consumables: Heating elements, temperature measuring components 7. Increase observation ports and endoscopes |
Furnace specifications:
specifications |
Furnace dimensions (depth, width, height mm) |
voltage |
Power kw |
PID instrumentControl accuracy |
A |
100x100x100 |
220 |
1 |
±1 |
B |
150X100X100 |
220 |
1.5 |
±1 |
C |
200X150X150 |
220 |
2 |
±1 |
D |
300X200X120 |
220 |
4 |
±1 |
E |
200×200×200 |
220 |
6 |
±1 |
F |
300×200×200 |
220 |
8 |
±1 |
G |
300X250X250 |
220/380 |
8 |
±1 |
H |
300×300×300 |
220/380 |
10 |
±1 |
I |
400X250X160 |
220/380 |
8 |
±1 |
J |
400×300×300 |
220/380 |
12 |
±1 |
K |
500×300×200 |
220/380 |
15 |
±1 |
L |
500×300×300 |
380 |
18 |
±1 |
M |
500X400X400 |
380 |
20 |
±1 |
N |
500×500×500 |
380 |
25 |
±1 |
U |
800×500×500 |
380 |
40 |
±1 |
V |
1200×500×500 |
380 |
85 |
±1 |
W |
1200×800×800 |
380 |
110 |
±1 |
Chongqing Box type Resistance Furnace (Where to Sell)Special furnace dimensions can be customized according to customer requirements!
The correct operation process of high-temperature box type resistance furnace
The specific process operation of the box type resistance furnace is as follows:
1. Check the "shift handover record" before starting work.
2. Operators should wear the prescribed protective equipment and be familiar with the "safety operating procedures".
3. Check the lubrication condition of the axle and slide rail of the furnace door opening mechanism.
4. Check the installation and fastening of the furnace lining, resistance wire, and thermocouple lead out rod, and verify if the instruments are functioning properly.
5. Check that the resistance wires at the bottom of the furnace, the bottom plate of the furnace, the transmission mechanism of the movable furnace bottom, and the motor lead wires are in good condition.
6. Check the cleanliness of the furnace and clean the oxide scale.
7. Newly repaired furnaces should be dried according to the "process specifications".
8. Cut off the power and proceed with the baking process according to the "process specifications".
9. Close the door of the box type resistance furnace.
10. Insulate according to the "process regulations".
11. Power on heating.
12. Cut off the power after work.
13. Produce the furnace according to the "process specifications".
14. Reinstall the furnace and repeat the above procedure.
When the box type resistance furnace is operated continuously, the "handover record" must be carefully filled out, and the handover must be clearly handed over to the successor in person.
16. Maintain and upkeep the equipment according to the "Equipment Maintenance Regulations".
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