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This product is compatible with the standards of GB/T 24189-2009 / ISO 7215: 2007: Iron ores for blast furnace feedstocks-Determination of the reducibility by the final degree of reduction index, GB/T 24515-2009 / ISO 4695: 2007: Iron ores for blast furnace feedstocks-Determination of the reducibility by the rate of reduction index, GB/T 31923.2-2015 / ISO 4696-2: 2007: Iron ores for blast furnace feedstocks-Determination of low-temperature reduction-disintegration indices by static method, GB/T 13241: Iron ore-Determination of reducibility such as GB/T 13242: Iron ores－Low-temperature disintegration test-Method using cold tumbling after static reduction, GB/T 13240: Iron ore pellets for blast furnace feedstocks－Determination of the free-swelling index.
Applications
Reduction degradation index of iron ore
The burden in blast furnace will be gradually heated during the descending and reduced in the temperature range between 400 and 600℃, the reduction of which under low temperature will lead to the cracking and fragmentation of sinter and pellets. As a result, the gas permeability of burden in shaft of blast furnace and the smooth operation of blast furnace will be deteriorated.
Determination of iron ore reducibility
The represents for reactivity of sinter and pellets during reduction reactions with reductive gases. Usually, the tested iron ore samples are prepared in required particle size range and weight and then reduced with reductive gas of fixed chemical composition and flow rate under constant temperatures. The reducibility of iron ore can be determined according to the variation in weight of tested sample or the ferric and ferrous content of sample after reduction, which can be applied to optimize the sintering and pelleting production process. The reducibility of iron ore has been regarded as a conventional index for the evaluation and guidance of blast furnace smelting.
Determination of reduction expansion index of pellets
Usually, the volume of pellets will expand to some extent during reduction, consequently the strength of which will be decreased accordingly. However, the production of blast furnace can be maintained smoothly if the decreasing of pellets strength is not that significant. However, the condition of blast furnace will be worsen dramatically due to the deterioration of gas permeability and the increasing of dust, which may lead to the hanging and slipping of burden or even the disorder of blast furnace, the decreasing of production rate and the increasing of coke ratio.
Standards
This product is compatible with the standards of GB/T 24189-2009 / ISO 7215: 2007: Iron ores for blast furnace feedstocks-Determination of the reducibility by the final degree of reduction index, GB/T 24515-2009 / ISO 4695: 2007: Iron ores for blast furnace feedstocks-Determination of the reducibility by the rate of reduction index, GB/T 31923.2-2015 / ISO 4696-2: 2007: Iron ores for blast furnace feedstocks-Determination of low-temperature reduction-disintegration indices by static method, GB/T 13241: Iron ore-Determination of reducibility such as GB/T 13242: Iron ores－Low-temperature disintegration test-Method using cold tumbling after static reduction, GB/T 13240: Iron ore pellets for blast furnace feedstocks－Determination of the free-swelling index.
The structure of our products is designed comprehensive considered for users, by which the operation of tests is significantly simplified while ensuring the accuracy and reliability of results. Meanwhile, our product is designed strictly according to ISO standards.
Note: It is necessary to provide the executive standard or clarify related requirements when ordering.
Invention patents of product
CN201220500860. A high-temperature reactor with a new structure
CN201120031250.3 Automatic furnace loading and unloading function
CN201420688294.7 Automatic weighing hook mechanism
1.This machine is used in the headquarters of S Baosteel in hanghai with a potential expansion capability in quatity;
2.This machine is used in scientific research experiments organized by CSIRO in Australia and has been highly praised.
3.Vietnam Ha Tinh Steel is now using uses five sets of this products in networking mode.
4.The rising and holding of temperature during test is controlled by center temperature, which ensures the high-speed response and accuracy of temperature. Meanwhile, the cooling module is also selectable, which will significantly reduce the interval between tests.
Main features
1 A superior repeatability of tested results, data measurement index.
2.The real time drawing of weight loss curve, reduction curve, set temperature, real-time temperature, gas flow rate during reduction and the saving and edited of data at any time.
3.The furnace hearth is heated by a resistance wire tube with an improved inclined groove. The furnace tube is made as thinner as possible to increase the speed of heating and balancing.
4.The loading and unloading of reactor during test is automatic, no manual intervention is necessary.
5.A exclusive unloading patent provides with protection of double limiter and mechanical clutch and total hardware independent manual control mode.
6.Modularization design of product provides all-in-one or detached options.
7.Small but powerful. Fast repairing and maintaining service after sale.
8.Center temperature is applied for the control of temperature under low temperatures, which ensure the reliability and accuracy of temperature.
9.Digital thermal mass flow rate meter, which will not be affected by temperature and atmospheric pressure;
10.Direct electromagnetic valve control for gas circuit with corrosion-resistant alloy valve core;
11.Comprehensive determination of malfunction and sound alarm for over heating, heating element damage, insufficient gas flow;
12.All operations can be done through software on computer and total hardware independent manual operation;
13.Optional protective / multi-machine network expansion/fast cooling/automatic weight input / imported hardware / gas analysis and other functional modules for configuration.
Other optional functional modules:
Multi-machine network expansion;
Protective shell;
Fast cooling module;
Wireless and automatic weight input;
Chemical analysis of gas;
Blended gas flow rate measurement;
Other liquid metal is optional during volume expansion test of pellets.
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