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Hebi Keda 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 location: Baichuan.com > Instruments and Apparatuses > Analysis instrument > Other analytical instruments > Hebi Keda Instrument Co., Ltd > Product display > Other coal test equipment > Hartmann's malleability tester >Hm-60 Hardgrove grindability index tester, coal test equipment

Hm-60 Hardgrove grindability index tester, coal test equipment

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Brand name: $brandmodel.title (imported brand) model: Origin: Mainland China Release time: 11:44:12, October 12, 2018 Update time: 2020 / 8 / 14 10:20:01

Product summary: Hm-60 Hardgrove grindability index tester is a special instrument for measuring the grindability of bituminous coal and anthracite. The measurement results of the instrument can correctly reflect the difficulty of coal grinding, and provide the basis for the design and operation of coal mills. It has the advantages of compact structure, good reliability and so on.

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Number of products: three hundred and thirty-two

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Details

Hm-60 Hardgrove grindability index tester, coal test equipment
Product introduction:
Hm-60 Hardgrove grindability tester is a kind of instrument specially used to measure the grindability of bituminous coal and anthracite. The measurement results of the instrument can correctly reflect the difficulty of coal grinding, and provide the basis for the design and operation of coal mills. It is widely used in coal, electric power, metallurgy, chemical industry and other industries. It is an instrument specially used to measure the grindability of bituminous coal and anthracite. The measuring principle of Hastelloy apparatus is based on the grinding law (that is, the energy consumed by grinding pulverized coal is directly proportional to the new surface area produced by pulverized coal). Under the conditions specified in gb2565 "determination method for grindability index of coal" (Hardgrove method), the prepared coal sample is grinded, screened and weighed, and the Hardgrove grindability index is obtained from the calibration chart drawn from the standard coal sample The larger the index, the easier it is to grind. The measurement results of the instrument can correctly reflect the difficulty of coal grinding, and provide the basis for the design and operation of coal mills.
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Performance features:
Hm-60 Hardgrove grindability index tester An instrument used to determine the grindability of bituminous coal and anthracite. Is more commonly used coal test equipment, with compact structure, good reliability, easy to use and other characteristics..
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Technical parameters:
1. Shaft speed: 20 ± 1R / min
2. The number of working revolutions is 60 ± 0.25r
3. Load force: 284 ± 2n
4. Integrated motor: 20W
5. Working power supply (V) AC220 V ± 10% 50 Hz
6. Weight (kg) 70
7. Overall dimension (mm) 365 × 425 × 443

working principle:
Hm-60 Hardgrove grindability index tester It is a special instrument based on the grinding law (the energy consumed by grinding pulverized coal is directly proportional to the new surface area produced by pulverized coal). Without changing its technical parameters and theme structure, it is redesigned. A pushing type upper bowl mechanism is added at the bottom of the machine body and the grinding bowl, and the electronic digital display speed controller is used to solve the heavy labor of holding the upper bowl by hand during operation, The reliability of the instrument has been improved, and it has become a new product. According to gb2565 "coal grindability index determination method" (Hardgrove method), under the specified conditions, the prepared coal sample is grinded, sieved, weighed and calculated to obtain the determination results. The larger the index is, the easier it will be grinded. It is suitable for laboratory use in coal, metallurgy, coking departments and scientific research units.

Hm-60 Hardgrove grindability index tester Structure and principle:
The coal sample with a certain particle size range is grinded in the Hartmann apparatus, and then sieved, weighed, compared and calibrated to find out the grindability index) the mechanism of the Hartmann grindability index tester is mainly composed of upper bowl mechanism, worm gear box, transmission gear, grinding ring and grinding bowl, motor and speed controller.
The motor and worm gear box are installed on the motor base, and then fixed on the right side of the frame. The main shaft is installed in the center of the machine body. The upper part of the base is equipped with big gear, heavy block and magnetic steel for sensing revolution. The lower part is connected with a grinding ring with a total load force of 284 ± 2n. There are horizontal rails (arc grooves) in the steel grinding bowl. There are eight steel balls with a diameter of 25.4 mm. The motor passes through the worm The transmission of the wheel box and gear drives the spindle at 20 rpm, and drives the grinding ring and eight steel balls to work.
The upper bowl mechanism is located at the bottom of the machine body and the grinding bowl, and is composed of bridge base, spiral convex plate, bowl supporting mandrel, handle and other mechanical parts. When the handle is moved by plate, the screw convex plate is driven to rotate, thus forming the vertical lifting movement of the mandrel, so as to complete the bowl operation.
The electrical system is composed of revolution controller and Hall element (magnetic steel), which can display the working revolution and automatically stop after the spindle rotates for 60 revolutions. If the main engine fails, it can stop in an emergency, and the number of starts again can be accumulated.
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Environmental conditions for use
(1) Ambient temperature: 0 ℃~ 40 ℃
(2) Relative humidity: ≤ 85%
(3) There should be no strong corrosive gas, strong electromagnetic equipment and strong permanent magnetic field.
Working conditions
(1) the product should be firmly placed on the laboratory bench with spacious indoor area and moderate light.
(2) before starting the machine, the products and other instruments and facilities used must be carefully checked, especially the wiring of the electrical system should be correct and reliable, and any abnormal situation should be handled in time.
(3) the operator must be a person who has received professional training and is familiar with this instruction manual and relevant supporting mechanical and electrical equipment, instruments and facilities. Unqualified operators are not allowed to work.
(4) when the machine is working, once the instrument fails, the power should be turned off immediately and the machine should be shut down for inspection.
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Calibration of instruments
1. Calibrate the hastellometer with grindability standard coal samples at least once a year.
2. When the instruments and equipment (including the test sieve) are updated or repaired, or there is doubt that there is something wrong with the Hastelloy instrument, the standard coal sample shall be used for calibration. The instrument calibration is carried out according to the method of "standard grindability coal sample operation manual"
After the experiment, turn off the power and clean the inside of the grinding bowl for the next test.



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