Activated carbon is an important adsorbent material widely used in industrial production, environmental protection, food, and pharmaceutical fields. To ensure the effectiveness and quality standards of activated carbon, comprehensive testing and analysis are necessary. Abrasion resistance and compressive strength are two important indicators for evaluating the physical properties of activated carbon. Abrasion resistance refers to the ability of the surface to resist wear and tear slowly under external force. Higher abrasion resistance indicates better wear resistance or friction resistance, stronger stability, and higher efficiency. Compressive strength refers to the ability of activated carbon to withstand external force without breaking or deforming. Compressive strength is one of the important indicators for evaluating the strength of activated carbon materials.
A Activated carbon wear resistance tester is an indispensable professional testing device in the fields of activated carbon production, application, and research. Its core function is to accurately quantify the abrasion resistance of activated carbon particles by simulating actual usage environments. This instrument is designed strictly in accordance with relevant national standards and is suitable for strength testing of coal-based granular activated carbon and wood-based activated carbon, providing a scientific basis for activated carbon quality assessment. Its working principle is based on mechanical wear simulation: the activated carbon sample is placed in a sealed drum containing steel balls. The drum's regular rotation causes the steel balls to collide and rub against the activated carbon particles, simulating the mechanical stress encountered in actual use. After a specified period of wear, the sample is transferred to a standard test sieve for particle size analysis. The strength value of the activated carbon is obtained by calculating the ratio of the mass of the remaining sample on the sieve to the original mass. This process effectively avoids human observation errors in traditional methods, ensuring the objectivity and repeatability of the test results.
Working Principle and Features
This instrument uses a motor to drive two drums at a speed of 50±2 r/min via a transmission mechanism. The activated carbon sample undergoes a strength test inside the drum. Inside the drum, the sample is continuously lifted by a baffle plate, and as the drum continues to rotate, the activated carbon particles are dropped back down. Simultaneously, the activated carbon particles experience collisions and abrasion with each other and with the drum wall, thus obtaining the abrasion resistance value of the activated carbon particles, which is used to determine their abrasion resistance capability.
Main Features of the Activated Carbon Strength Tester:
1. The drum sensor uses a highly integrated electronic switch, featuring long service life and good anti-interference performance, solving the problem of incorrect counting after a period of use when using a reed switch as a sensor.
2. A microcomputer chip completes automatic time control, with a simple structure and reliable performance.
3. The tester uses single-chip microcomputer control, featuring accurate counting and simple and convenient operation.
4. The reduction in the speed reduction transmission solves the problem of oil leakage in the speed reducer.
5. The machine completes the set parameters within 20 minutes ± 0.1 minutes on a single startup. The actual machine running time is not lost during power outages. The set time is automatically resumed after power is restored. Furthermore, the time range can be arbitrarily set according to individual needs.
Core Advantages: Intelligent Design Improves Testing Efficiency
1. Automated Control Reduces Human Error
The instrument adopts a Mitsubishi PLC control system and a 7-inch Weintek touchscreen, supporting Chinese and English operation. Users only need to set parameters such as speed and time, and the equipment can automatically complete processes such as feeding, timing, and shutdown prompts. After the test, the system automatically locks the maximum intensity value and generates a data report, avoiding deviations from manual readings. For example, a chemical company reduced the testing time from 45 minutes using traditional methods to 30 minutes using this equipment, with repeatability error controlled within 0.5%.
2. High-Precision Sensors Ensure Data Reliability
Equipped with imported American force sensors, the measurement range covers 0-2000N, with a resolution of 0.1N and an accuracy error of less than ±0.02% F·S. In coal-based activated carbon testing, the equipment can accurately capture the pressure changes during particle crushing, maintaining data stability even with samples exhibiting significant differences in hardness (such as lignite-based and anthracite-based activated carbon). A comparative experiment by a third-party testing agency showed that its test results deviated from the standard value by less than 0.3%, far exceeding the industry-required 2% threshold.
3. Modular Structure Facilitates Maintenance and Upgrades
The rollers feature a detachable design, with the inner wall hardened by a silicon nitride coating, offering three times the wear resistance of traditional stainless steel and extending its service life to over five years. The transmission system is equipped with an imported Delta servo motor and driver, operating at a noise level below 55 decibels, and requiring only monthly lubrication to maintain optimal condition. Furthermore, the equipment has a reserved data interface for seamless integration with MES production management systems, enabling real-time uploading and traceability of test data.
Activated Carbon Testing Methods
Specific Surface Area Determination Method:** The BET nitrogen adsorption method is used to calculate the specific surface area by measuring the amount of nitrogen physically adsorbed on the activated carbon surface. The test temperature is 77K, and adsorption data under different relative pressures are used for calculation.
Iodine Value Determination Method:** Iodine value is determined according to GB/T 12496.8-2015 standard using the iodine titration method. The activated carbon sample is contacted with an iodine standard solution, shaken, filtered, and the residue is titrated with a sodium thiosulfate standard solution.
Moisture Content Determination Method:** Moisture content is determined according to GB/T 12496.3 standard using the drying method. The sample is dried to constant weight at 103±2℃, and the percentage of weight loss is calculated.
Particle Size Distribution Determination Method:** Mechanical sieving is performed using a standard sieve system, and the mass percentage of different particle size ranges is statistically analyzed.
pH Value Determination Method:** The activated carbon sample is mixed with deionized water in a certain proportion, and the pH value of its aqueous extract is measured.
Instrument Operation Procedure
Sample Preparation: Take 100g of sample, sieve it through a standard sieve, and dry the residue on the sieve at 140±10℃ to constant weight.
Measure 50mL of the dried sample using a graduated cylinder, weigh it, and record the weight (accuracy 0.1g).
Test Execution:
Place the sample and steel ball into the drum, tighten the end cap, and secure it to the instrument.
Start the instrument; the drum will rotate for 5 minutes (time adjustable). After automatic shutdown, remove the drum.
Result Analysis:
Pour out the steel ball and transfer the sample to a test sieve, vibrating it for 5 minutes.
Collect the residue on the sieve and weigh it. Calculate the strength value. The error between two parallel test results must be ≤2%.
Multiple Functions:
Manufacturing enterprises can rely on it to monitor the quality of the production process and adjust process parameters in a timely manner; purchasing parties can ensure the performance of raw materials meets standards through random sampling, avoiding production accidents caused by insufficient strength; research institutions can use it to conduct activated carbon modification research and explore the correlation mechanism between strength and adsorption performance. With the expansion of activated carbon application fields, the sealed activated carbon strength tester has become a core tool for ensuring product quality and driving technological innovation.
The sealed activated carbon strength tester, with its scientifically rigorous working principle, intelligent and efficient automated design, accurate and reliable testing performance, and convenient and flexible modular structure, demonstrates irreplaceable core value in the field of activated carbon quality testing. It not only provides standardized and digitalized quality control methods for manufacturing enterprises, purchasing parties, and research institutions, but also helps the industry achieve breakthroughs in process optimization, material innovation, and performance improvement through real-time data feedback and in-depth analysis. As the application scenarios of activated carbon continue to expand, this instrument will continue to play a supporting technical role, driving the industry towards higher quality and higher efficiency, becoming a key cornerstone for ensuring product stability and driving technological innovation.
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