| Customization: | Available |
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| After-sales Service: | Online |
| Warranty: | 1 Year |
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HR-5 microcomputer ash melting point tester is a high-tech product successfully developed by our company. The instrument uses a microcomputer to automatically control the ash fusibility test process. The ash cone image is directly displayed on the microcomputer, and the ash cone result image and the corresponding temperature value can be automatically printed. During the test, the image and temperature are automatically stored in the hard disk memory. The instrument can be widely used in power, coal, cement, metallurgy and other industries.
Microcomputer Ash Melting Point Tester Ash Fusibility Tester Dust Melting Point Tester
2. The product has the following main features
★ The microcomputer automatically controls the temperature rise, and the temperature rise characteristics meet the national standard GB/T219-2008
★ The ash cone image is automatically displayed in the image acquisition window of the microcomputer display
* The system has the function of storing and reading and writing test results, and can store the ash cone image in the computer or call out the saved test data
★ Can print the ash cone image results and temperature
★ The screen displays the temperature rise curve
★ The system runs on the WINDOWSXP operating system★ The high-temperature furnace is equipped with a turntable, making sample loading simple and easy to use
Automatically store and display the entire experimental process, the furnace body can be rotated, and it is easy to take and put.
Technical indicators and parameters of the microcomputer ash melting point tester Measurement range: 0-1600ºC, resolution 1ºC, equipped with s-division thermocouple Heating speed: 15-20'C/min before 900ºC
5+1°C/min after 900'C
Measurement error: +3°C
Power supply: AC220V+10%, 50Hz Test atmosphere: oxidizing or weakly reducingTest atmosphere: oxidizing or weakly reducing
Microcomputer Ash Melting Point Tester Ash Fusibility Tester Dust Melting Point Tester
3.Furnace installation
a) Place the furnace body horizontally, carefully insert the silicon carbon tube into the corundum outer tube, and then insert the corundum inner tube into the silicon carbon tube.
b) Install the electrode card on the aluminum sprayed part of the silicon carbon tube and connect the wire.
c) Adjust the position of the control box so that the camera is aimed at the observation hole of the high-temperature furnace. Note: The camera should be kept about 15 cm away from the observation hole of the high-temperature furnace to avoid damage to the camera due to excessive temperature.
d) Install the silicon carbon tube and inner sleeve of the high-temperature furnace. Insert the thermocouple from the back of the furnace body into the constant temperature zone of the inner sleeve of the high-temperature furnace (usually in the middle), and adjust the thermocouple end so that it is located on the upper part of the inner sleeve. Use a cable to connect the two poles of the silicon carbon tube of the high-temperature furnace and the load terminal on the rear panel of the control box.
e) Use the cable provided to connect the video and control plugs on the control box to the corresponding plugs on the computer.
f) Connect the thermocouple to the thermocouple socket on the computer.
g) Use a cable to connect the power supply to the power supply on the control box; terminal.
1. High temperature zone measurement. After the instrument is installed, its high temperature zone must be measured to select the sample placement location.
2. The sample is placed on the ash cone support plate.
The ash cone support plate is placed in the groove of the corundum boat. Then place the material used to control the atmosphere in the corundum boat, such as charcoal, anthracite, graphite, etc.
3. Furnace atmosphere control. (1) Weak reducing atmosphere There are two types of high temperature furnaces in this instrument: airtight corundum tubes and air-repellent corundum tubes (usually the instrument is equipped with air-repellent corundum tubes). The control methods of the weak reducing atmosphere are as follows: A. Airtight corundum tube: Place 5~6g of graphite (particle size ≤0.2mm, ash content ≤15%) in the middle of the furnace, or introduce 50+10% H2 and +10% C02 mixed gas, with a ventilation rate of 2100ml/min. B. Gas-repellent corundum tube: Place 15~20g of graphite (particle size ≤0.2mm, ash content ≤15%) in the middle of the furnace, and 30~40g of anthracite (particle size ≤0.5mm, ash content ≤15%) on both sides of the graphite.
5.In addition to graphite and anthracite, the enclosed carbon-containing substances can also be charcoal, coke, petroleum coke, etc. Their particle size, quantity and placement depend on the actual situation of the county.
(2) Oxidizing atmosphere
No carbon-containing substances are placed in the furnace, and air is allowed to circulate
(3) Identification of the atmosphere in the furnace
When the method of enclosing carbon-containing substances is used to produce a weak reducing atmosphere, one of the following methods is required to determine the atmosphere in the furnace. A. Standard cone method: Select fusible coal ash containing 20-30% ferric oxide, and measure its melting temperature in strong reducing (100% H2 or a large amount of anthracite or charcoal is sealed in the furnace), weak reducing and oxidizing atmospheres respectively in advance (T2 or T3 in strong reducing and oxidizing atmospheres should be 100~300ºC higher than that in weak reducing atmospheres), and then use them as standards to identify the atmosphere in the furnace. If the difference between the measured T2 or T3 reduction and the measured value in the weak atmosphere does not exceed 50ºC, it proves that the atmosphere in the furnace is weakly reducing: otherwise, the difference between them and the measured values in the strong reducing and oxidizing atmospheres and the degree of oxidation of the sealed carbon-containing substances should be used to judge whether the atmosphere is strongly reducing or oxidizing.
B. Gas analysis method: Take out gas from the high temperature zone of the furnace at a rate of 5~7m1/min for analysis. If the reducing gas (mainly CO, but also H2, CH4) is 10~70% (the volume ratio of them to CO2 is 1:1 at 1100ºC) within 1000~1300ºC, and the O2 content is 0.5%, it is a weak reducing atmosphere.
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