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Heda Kebi Instrument Co., Ltd Main products: calorimeter, sulfur detector, sulfur analyzer, coal analyzer series, colloid layer tester, muffle furnace, box type high temperature furnace series, calorific value, ash melting point series

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Current position: Baichuan.com > Instruments and Apparatuses > Analysis instrument > Other analytical instruments > Heda Kebi Instrument Co., Ltd > Product display > Ash melting point series > Ash melting point tester >Kdf-6hr automatic measuring instrument for coal ash melting point

Kdhr-6f intelligent automatic ash melting point measuring instrument for coal

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Brand name: $brandmodel.title (imported brand) model: Origin: Mainland China Release time: October 29, 2018 12:04:01 Update time: 2020 / 8 / 8 9:51:16

Product summary: Coal kdhr-6f intelligent automatic ash melting point tester has high degree of automation: only need to turn on the power switch, furnace body heating, temperature control speed and so on are all automatically controlled by single chip microcomputer. High reliability of single-chip microcomputer, using silicon phase-shifting temperature control method to extend the heating time according to the load requirements.

Product perfection: Number of visits: thirty-two

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Registered capital: RMB 10000 [certified]

Number of products: three hundred and thirty-two

Number of visits: two hundred and seven thousand six hundred and six

Mobile website: http://m.caijubei.com/c54987/

Shop address: http://http://www.hebikeda.com

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Details

Kdhr-6f intelligent automatic ash melting point measuring instrument for coal
Product advantages:
High degree of automation: just turn on the power switch, the heating of furnace body and the control of heating speed are all controlled by single chip microcomputer automatically. High reliability: the heating adopts phase-shifting control mode, and the single-chip microcomputer automatically controls the load voltage according to the heating speed requirements, effectively prolonging the service time of the silicon carbon tube. ?
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Standards adopted:
GB / T 219-2008 determination method of coal ash fusibility
Scope of application:
It is mainly suitable for the determination of ash fusibility in power, metallurgy, petrochemical, coal chemical, environmental protection, geological exploration, grain, feed and other industries.
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Performance features:
1. High degree of automation: just turn on the power switch, the heating of furnace body and the control of heating speed are all controlled by single chip microcomputer automatically.
2. High reliability: the heating adopts phase-shifting control mode, and the single-chip microcomputer automatically controls the load voltage according to the heating speed requirements, effectively prolonging the service time of the silicon carbon tube.
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Technical parameters:
The temperature measurement range of thermocouple is 1 600 ℃.
Time range: 0-999min, resolution 1min (LS for less than 10min).
Heating rate: 15-20 ℃ / min before 900 ℃
After that, 1 ℃ ± 900 ℃
Temperature measurement error: ± 3 ℃
Control current: < 30A
Experimental atmosphere: oxidizing, weak reducing
Number of samples: 1-7
Power supply voltage: AC220 V ± 10% 50 Hz
Power: ≤ 5KW
Overall dimension (mm): furnace body 700 × 320 × 560, controller 320 × 350 × 160
Weight: 40kg

Furnace body installation
1. Place the furnace body horizontally and carefully insert the silicon carbon tube into the corundum jacket
In the tube, the corundum inner sleeve is inserted into the silicon carbon tube, and a small amount of light firebrick fragments or absolute gasket are padded at both ends between the silicon carbon tube and the corundum outer tube.
2. Connect the silicon electrode and install it on the silicon tube.
3. Adjust the camera so that the camera is aimed at the observation hole of the high temperature furnace.
4. Install silicon carbon tube and inner sleeve of high temperature furnace. Remove the thermocouple from the furnace body
The rear part is inserted into the constant temperature zone (generally in the center) of the high temperature furnace casing, and the thermocouple end is adjusted to be located at the upper part of the inner sleeve.
5. Connect the ash melting point host computer with the corresponding plug on the computer with the control line equipped with the machine.
6. Connect the power cable of the main unit to the power cable.

Daily maintenance of ash fusibility tester
1. The sample should be fine enough (less than 0.1 mm);
2. The tip of ash cone should be kept intact;
3. When the ash cone is pasted, the ash cone should be in a vertical state with the ash cone supporting plate;
4. Keep the quartz plate and lens clean
5. In order to ensure the accuracy of the positive results, we can make manual judgment from the images stored in the database according to the specific situation;
6. The high temperature furnace should not be kept at the limit temperature for a long time
7. Silicon carbon tube and other components should be replaced regularly;
8. If the instrument cannot work normally due to abnormal conditions, it should be handled before use

instructions:
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1. High temperature zone determination. After the instrument is installed, its high temperature must be measured
To select the location of the specimen.
2. The sample is placed on the ash cone supporting plate.
Place the corundum in the corundum. Then the corundum boat is placed with materials for controlling the atmosphere, such as charcoal, anthracite, graphite, etc.
3. Control the atmosphere in the furnace.
(1) Weak reducing atmosphere
There are two kinds of high temperature furnace furnace of this instrument: air tight corundum tube and gas sparing high alumina tube (usually the instrument is equipped with high alumina tube with gas sparing). The control methods of weak reducing atmosphere are as follows:
a. Gas tight corundum tube: graphite (particle size ≤
2 mm, ash content ≤ 15%) 5 ~ 6G or 50 ± 10% H2 and ± 10% CO2 mixed gas, ventilation speed ≥ 100ml / min.
b. Gas drainage corundum tube: place graphite (particle size) in the center of furnace
15-20g for ≤ 0.2mm, ash ≤ 15%) and 30-40g anthracite (particle size ≤ 0.5mm, ash ≤ 15%) on both sides of graphite.
In addition to graphite and anthracite, the enclosed carbonaceous materials can also be charcoal, coke, petroleum coke, etc. Their particle size, quantity and location depend on the specific situation.
(2) Oxidizing atmosphere
There is no carbonaceous material in the furnace, and the air can circulate freely.
(3) Identification of furnace atmosphere
When the method of sealing carbon containing materials is used to produce weak reducing atmosphere, the following methods should be used to judge the atmosphere in the furnace.
a. Standard cone method: the fusibility temperature of fusible coal ash containing 20 ~ 30% Fe2 @ 3 was measured in the strong reducing atmosphere (100% H2 in the furnace or a large amount of anthracite or charcoal sealed in), weak reducing and oxidizing atmosphere (T2 or T3 of strong reducing and oxidizing atmosphere should be 100 ~ 300 ℃ higher than that of weak reducing atmosphere), and then use them as the standard to identify the furnace atmosphere. If the difference between the measured values of T2 or T3 reduction and the measured values in weak atmosphere is not more than 50 ℃, it is proved that the atmosphere in the furnace is of weak reducibility; otherwise, it is necessary to judge whether the atmosphere is strong reducing or oxidizing according to the difference between the measured values in strong reducing and oxidizing atmosphere and the oxidation degree of the enclosed carbonaceous material.
b. Gas analysis method: 5 ~ 7ml / min from the high temperature zone of the furnace.
If the reductive gases (mainly Co, also including H2, CH4) are 10-70% (volume ratio of them to CO2 is 1:1 at 1100 ℃) and the O2 content is 0.5%, it is a weak reducing atmosphere.
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