Instruments for Testing Refractories - product brochure
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Instruments for Testing Refractories Hot Modulus of Rupture – HMOR 422 Refractories under Load and Creep in Compression – RUL/CIC 421 Analyzing & Testin

NETZSCH Instruments for Testing Refractories under Thermal and Thermomechanical Stress Today, selection of the proper refractory material is more crucial than ever when it comes to improving the cost-effectiveness of a process and prolonging the life cycle. Appropriate selection of the refractory furnace lining can only be made with accurate knowledge of the properties of the refractory materials and the stresses on the materials during service. Thermomechanical properties are determined using high-temperature test methods with external forces causing stresses on the tested material. The...

Refractoriness Under Load and Creep in Compression Method Refractoriness under load (RUL) is a measure of the resistance of a refractory product to subsidence when subjected to the combined effects of load, rising temperature at a predefined heating rate. The range in which softening occurs is not identical with the melting range of pure raw materials, but it is influenced by the content and the degree of distribution of low melting point fluxing agents. RUL The RUL test method is described in ISO 1893, Refractoriness under load (RUL, differential – with rising temperature). A cylindrical...

RUL/CIC 421 Measurements can be carried out in static air (basic version) or using an optional device for inert gas purge within the test piece area. Generally, identical test piece dimensions of 50 mm in diameter and 50 mm in height are used for both the RUL and the CIC test. For the high-precision differential measuring system used in determining expansion and deformation, the cylindrical test piece has a coaxial bore of 12.5 mm. The ground faces should be plane, parallel and perpendicular to the axis of the cylinder (ISO/DIN). Other test piece dimensions are also possible (e.g., 36 mm,...

Refractoriness under Load (RUL) of Andalusite Bricks Quality Control of Castable Refractories by RUL Tests Lab Test Product 1; poor result Product 1; good result Product 1; poor result Product 1; good result Test pieces of the andalusite bricks fired at different temperatures are used for CIC tests. In these tests, the load is applied once the temperature is reached (here, at 1425°C). This is contrary to RUL tests, where the load is applied from the very beginning of the measurement. This plot only shows the time-scaled creep at constant temperature (the heating segment is not depicted)....

Technical Specifications RUL/CIC 421 Model RUL/CIC 421 E/6 Temperature range Heating elements Test atmosphere Safety switch RT to 1700°C 4 Super-Kanthal 1800 Static air; optional inert purge gas Failure of test piece Model RUL/CIC 421 G/6 Temperature range Heating elements The RUL/CIC runs under Proteus® software on Windows® for the fully automatic test run, data acquisition, storage and off-line evaluation. Protective tube Ability to evacuate Test atmosphere Safety switches Graphic and tabulated results, calculated according to ISO/DIN Correction of the measured data by calibration curves...

High-Temperature Bending Strength Tester Determination of the Hot Modulus of Rupture The hot modulus of rupture (HMOR) is an important parameter in the characterization of refractories. Along with other thermophysical properties, the maximum load until breakage at high temperatures plays a significant role in the quality control and development of furnace linings. HMOR 422 Models NETZSCH offers two HMOR models: HMOR 422 D/3 for continuous operation up to 1500°C and a maximum load of 5000 N with optional devices for: Load and deformation tests Constant deformation rate HMOR 422 E/4 for...

Technical Specifications HMOR 422 E/4 – Recording of Load and Deformation The HMOR 422 E/4 performs bending strength measurements on test pieces with dimensions of 45 mm x 4.5 mm x 3.4 mm. In contrast with the 422 D/3 model, deformation of the test piece is here measured at the bottom via a differential measuring device. The internal tube comes into contact with the bottom of the test piece and the external tube is attached to the bottom flange of the 4-point bending device as a reference point. The split shell furnace (max. 1450°C) is hinged and opens for easy insertion of the test piece....

TEST PIECE PREPARATION Depending upon user needs, machines are available for the preparation of test pieces for RUL measurements, as follows: Quality Control – Modulus of Rupture of a Kiln Furnace Product The HMOR yields information on the maximum stress a rectangular test piece can withstand prior to breakage when it is tested in a three-point bending device. The deformation under increasing load (stress-strain curve) can additionally be measured using the optional load and deformation device. The test results on three kiln furnace products below clearly show that the average modulus of...

All over the world, the name NETZSCH stands for comprehensive support and expert, reliable service, both before and after sale. Our qualified personnel from the technical service and application departments are always available for consultation. In special training programs tailored for you and your employees, you will learn to tap the full potential of your instrument. Choose your preferred training method: Online, on-site or at our NETZSCH training center. Grinding Machine The surface grinding machine with swingable grinding head and precision grinding spindle for mounting cup grinding...

The NETZSCH Group is an owner-managed, international technology company with headquarters in Germany. The Business Units Analyzing & Testing, Grinding & Dispersing and Pumps & Systems represent customized solutions at the highest level. More than 4,000 employees in 36 countries and a worldwide sales and service network ensure customer proximity and competent service. Our performance standards are high. We promise our customers Proven Excellence – exceptional performance in everything we do, proven time and again since 1873. NGB · Refractory Materials · EN · 0723 · Technical specifications...