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Tumble Drum and Rotation Equipment for ISO 15967

In various industries, Tumble drums and rotation equipment play a crucial role in testing the durability and performance of products. One such application is ISO 15967, a standard that specifies the method for determining the tendency of hot briquetted iron (HBI) to self-heat. This article explores the significance of tumble drums and rotation equipment in ISO 15967 testing, their key features, and their applications.

Tumble Drum and Rotation Equipment: Tumble drums are versatile testing devices that facilitate the evaluation of product resilience and longevity. These drums are designed to simulate real-world scenarios by subjecting products to repetitive tumbling motions, Ensuring that they can withstand extensive use and remain reliable. In the context of ISO 15967 testing, tumble drums offer an effective solution. ISO 15967 determines the self-heating tendency of hot briquetted iron, a critical parameter for the safe handling and transportation of this material. Tumble drums, Specifically designed for ISO 15967 testing, allow for controlled and precise evaluations.

Tumble Drum and Rotation Equipment

In the field of material testing, The determination of the tumble and abrasion indices of hot briquetted iron (HBI) plays a crucial role. To accomplish accurate and efficient testing, the utilization of tumble drum and rotation equipment, specifically designed for ISO 15967 standards, has become indispensable. The equipment rotates at higher speeds and intensifies the forces acting on the HBI samples, providing a comprehensive evaluation of their resistance to mechanical wear and tear.

Tumble drum and rotation equipment are specialized tools designed to mimic the demanding conditions that hot briquetted iron (HBI) may encounter during handling, transportation, or storage. These tools provide valuable insights into the durability and resistance of HBI against potential damage or excessive wear, making them essential for quality inspection processes BS ISO 15967

Sampling of a lot of HBI and sample preparation shall be in accordance with ISO 1 0835. 5.1 Sampling and Sample Preparation 5 Sampling, Sample Preparation and Preparation of Test Portions
A test sample of at least 70 kg, on a dry basis, shall be obtained.
Oven-dry the test sample to constant mass at 1 05 °C ± 5 °C and cool it to room temperature before preparation of the test portions.
Note: Constant mass is achieved when the difference in mass between two subsequent measurements becomes less than 0,05 % of the initial mass of the test sample.
Sieve the test sample by hand on a 40 mm test sieve to discard any − 40 mm material.
Spread the test sample on a smooth and flat plate to form a single layer of briquettes, in the shape of a rectangle. 5.2 Preparation of Test Portions
At least 4 test portions, each of approximately 1 5 kg, shall be prepared by taking, at random, single briquettes and placing them consecutively in 4 piles or containers.
Weigh the test portions and determine whether they meet the mass tolerance of 1 5 kg ± 0,5 kg. Single briquette increments shall be added to the test portions from the remaining test sample or removed from the test portions and discarded to make up a weight of 1 5 kg ± 0,5 kg. Register the mass of each test portion on its recipient label.

ISO 15967 sets forth standard procedures and testing techniques for the determination of the tumble and abrasion indices of HBI. By implementing this international standard, manufacturers can assess the quality and performance characteristics of HBI with improved accuracy and reliability. The tumble drum and rotation equipment designed for ISO 15967 standards play a vital role in the quality control and development of hot briquetted iron (HBI). By accurately evaluating the tumble and abrasion indices of HBI, manufacturers can ensure the durability, resistance, and overall quality of their products.

The utilization of these specialized testing tools, in compliance with ISO 15967, enhances the standardization of testing procedures while enabling manufacturers to optimize their production processes and deliver superior products to the market. By prioritizing quality control and utilizing reliable testing equipment, The direct reduced iron industry can continue to thrive and meet the evolving needs of customers worldwide.

The test apparatus shall comprise:
a) ordinary laboratory equipment, such as an oven, hand tools and safety equipment;
b) tumble drum and rotation equipment;
c) test sieves;
d) a weighing device.
6.1 General 6 Apparatus, Tumble Drum and Rotation Equipment
Made of steel plate at least 5 mm in thickness, having an internal diameter of 1 000 mm and an internal length of 500 mm. Two equally spaced L-shaped steel lifters 50 mm flat × 50 mm high × 5 mm thick and 500 mm long shall be solidly attached longitudinally inside the drum by welding, in such a manner as to prevent accumulation of material between the lifter and drum. The door shall be so constructed as to fit into the drum to form a smooth inner surface. During the test, the door shall be rigidly fastened and sealed to 6.2 Tumble Drum, 
Prevent loss of the sample. The drum shall be rotated on stub axles attached to its ends by flanges welded so as to provide smooth inner surfaces. The drum shall be replaced when thickness of the plate is reduced to less than 3 mm in any area. The lifters shall be replaced when the height is reduced to less than 47 mm.
Capable of operating on a minimum 1 ,5 kW power supply to ensure that the drum attains full speed in one revolution, rotates at a constant speed of 25 r/min ± 1 r/min and stops within one revolution. The equipment shall be fitted with a revolution counter and with an automatic device for stopping the drum after a predetermined number of revolutions. 6.3 Drum-Rotation Equipment, 
Conforming to ISO 331 0-1 or ISO 331 0-2 and having square mesh apertures of the following nominal sizes: 40,0 mm; 6,30 mm; 500 µm. 6.4 Test Sieves, 
Capable of weighing the test sample and test portions to an accuracy of 1 g. 6.5 Weighing Device, 

Tumble drums and rotation equipment designed for ISO 15967 play a vital role in assessing the self-heating tendencies of hot briquetted iron. These testing devices enable manufacturers and researchers to simulate real-world handling conditions with precise control. By subjecting the material to repetitive tumbling motions, tumble drums help ensure the safety and reliability of hot briquetted iron during transportation and storage. Their ability to replicate real-world conditions, combined with the controlled testing parameters, allows for accurate evaluation of product durability and performance → Schematic Diagram of Tumble Drum and Rotation Equipment

The advantage of using tumble drums for drum testing is their ability to replicate real-world conditions. The controlled rotation speed, duration, and the chamber design ensure consistent and accurate testing results. The ISO 15967-compliant tumble testers, featuring removable doors for easy loading and unloading, offer enhanced convenience and safety. The accurate measurement and containment capabilities of these testers allow for a comprehensive analysis of various parameters related to the self-heating tendencies of hot briquetted iron.

Principle of ISO 15967: Tumble drums find broader applicability across different industries and products in conducting drum tests. The test portion is tumbled in a circular drum for a total of 200 revolutions, at 25 r/min. The product material is sieved with test sieves having square openings of 6,30 mm and 500 µm. The tumble index is expressed as the mass percentage of material greater than 6,30 mm, and the abrasion index as the mass percentage of material less than 500 µm.

Carry out the test as many times as required by the procedure in Annex A. 7.1 Number of Determinations for the Test 7 Test Procedure, Tumble Tester for ISO 15967
Take, at random, one of the test portions prepared in 5.2, record its mass (m 0 ) and place it in the tumble drum (6.2). Tightly fasten the door and rotate the drum at 25 r/min ± 1 r/min for a total of 200 revolutions. Stop the drum and keep the door fastened for at least 2 min before opening, to allow the dust to settle. 7.2 Tumbling
DANGER – Tumbling of HBI can be noisy and care must be taken to protect the hearing of the operator.
It is recommended that putty or modelling clay be used to seal the door, to prevent the loss of fines from the drum.
Remove all the material carefully from the drum and hand sieve it on the 6,30 mm and 500 µm sieves (6.4). 7.3 Sieving
Determine and record the mass of each fraction retained on 6,30 mm (m 1 ) and 500 µm (m 2 ) sieves to the nearest 1 g. Material lost duringsieving shall be considered to be part of the − 500 µm fraction.
The difference between the initial mass of the test portion and the total mass of the fractions shall not exceed 1 ,0 %. If this difference exceeds 1 ,0 %, the test shall be rejected.
Note: Equivalent mechanical sieving may be used, provided that preliminary test results give similar results to hand sieving within the permissible tolerance of 2 % absolute.
Care should be taken to ensure that the sieves are not overloaded. An efficient way of achieving this is by including a sieve of aperture size between 6,3 mm and 500 µm (e.g. 2,0 mm or 1 ,0 mm) and another of aperture size larger than 6,3 mm (e.g. 1 0,0 mm or 8,0 mm). This will improve sieving efficiency by decreasing the sample mass retained on the 500 µm and the 6,3 mm sieves.
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