Wuhan Box type Resistance Furnace (Programmable)

NegotiableUpdate on 06/04

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Nature of the Manufacturer: Producers

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Overview

Wuhan box type resistance furnace (programmable) 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

Technical requirements for determination of ash content and volatile matter in Wuhan box type resistance furnace (programmable)

The determination of volatile matter is a highly standardized test, and its results depend on the specified test conditions. Therefore, when determining the volatile matter of coal, we should strictly follow the provisions of national standards and regulations. The main technical requirements are analyzed as follows:

The temperature inside the muffle furnace should be strictly controlled within the range of 900 ℃± 10 ℃. When opening the furnace door and placing the sample, the furnace temperature must be restored to 900 ℃± 10 ℃ within 3 minutes after closing the furnace door.

The timing tool for heating time should use a stopwatch, which means that the timing should be accurate for 7 minutes from the moment the sample is sent into the high-temperature zone of the furnace until it leaves the furnace. Otherwise, the sample should be invalidated and weighed again.

3. The determination of volatile matter should be carried out using a crucible with a slotted lid. When weighing the sample, it should be weighed together with the crucible cover. When the crucible is burned in the furnace, direct contact between crucibles and the high-temperature furnace wall should be avoided.

When measuring, if black smoke accumulates on the crucible or crucible cover, the test is also considered invalid. This is because the volatile matter content in coal is too high, and the rate of escape (decomposition) is too fast. At this time, the coal sample should be pressed into coal cakes and cut into small pieces before measurement, or the sample size should be reduced as appropriate before measurement

Technical requirements for determination of ash content by muffle furnace:

The coal sample in the experimental ash tray should be spread as flat as possible, and the thickness of the sample in the ash tray should not be too large.

During ashing, the furnace door can be opened and the ash dish containing the coal sample on the heat-resistant plate can be slowly pushed closer to the muffle furnace mouth. First, the coal sample in the ash dish should be slowly ashed and smoke. After waiting for a few minutes, when the coal sample no longer smokes, slowly push the ash dish into the hot part of the muffle furnace, close the furnace door, and burn the test sample at 815 ℃± 10 ℃ for 40 minutes. If there is coal sample ignition and explosion during the ashing process, this experiment is invalid and the coal sample ashing must be re weighed

The muffle furnace should have a chimney or ventilation hole to allow the coal sample to eliminate high combustion products and maintain air circulation during the burning process.

The control system of the muffle furnace must indicate accurately. The temperature rise capacity of the high-temperature furnace must meet the requirements for determining ash content.

The ashing time should be able to ensure that the sample is ashed at a temperature of 815 ℃± 10 ℃, and cannot be arbitrarily prolonged or shortened.

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

Wuhan Box type Resistance Furnace (Programmable)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".