According to: RUL ISO 7992, Clustering ISO 11256, Sticking HYL
LR 8000 system is an automatic equipment able to operate the tests on iron ore and similar raw materials according to standards ISO 7992 (RUL), ISO 11256 (Clustering) and HYL Sticking.
Determination of Reduction is performed under mechanical Load and is an iron ore testing method where a sample is isothermally reduced in a fixed bed, at a fixed temperature using proper reducing gas Mix., until a prefixed degree of reduction is obtained.
The equipment is based on a Control Cabinet connected with a vertical oven able to heat the reaction tube at test temperature, controlled by thermocouples placed in the oven wall and inside the reaction tube.
The test process is driven by a PAC unit (Programmable Automation Controller) with an I/O unit devoted to handle inputs and outputs from the probes and transducers of the system.
A Touch Screen user interface provides for a friendly guided instruction before starting the test and gives onscreen information about the status of the system as well the main test parameters during the run of the test. Test results are available On-Screen and also on an external memory unit (USB) for storage, print and post processing purposes.
The printing feature of the provided PC Software allows to print out the test results as
prescribed in the Standards.
The Control Cabinet is equipped with a PAC unit (Programmable Automation Controller) and Touch-Screen Control System with specific software designed in order to comply with different standards.
Recording and Data Logging of all main system variables is available on external memory drive (USB).
All the messages, alarms and information on the status of the system are displayed on the Touch Screen unit.
The Touch Screen Unit is directly connected to the I/O Unit where all the signals, coming from the measuring instruments, are collected and processed.
The main Page (Home Page) displays the complete information about the status of the system and the following process variables:
All these variables are available also in a graphic format in which all parameters are displayed vs. time.
The system is equipped with an Electric Vertical oven of about 12 kW maximum power. The oven design includes 3 horizontal heating zone. Each heating zone is constituted by silicon carbide heating elements electrically connected in series.
A quartz tube is placed inside the oven to avoid any contact between the reaction tube and the heating elements. An external alarm thermocouple is placed in the refractory wall to monitor the oven temperature.
This thermocouple is connected to the safety temperature circuit in order to avoid any over temperature. The maximum allowed temperature is set to 1200 °C. The vertical electric oven is equipped with a precision weighing system with a resolution of 0,1 g and a full scale value of 32 kg.
The Printing Tool is a Windows© software that allows to print, save and store all data of performed tests.
At the end of the test procedure, a new file is stored in the external memory USB stick.
Test results are displayed in both textual and graphical format. A spreadsheet layout is also available.
The printing feature of the Software allows to print out the test results as prescribed in the ISO procedures.
|ISO 7992 RUL||ISO 11256 Clustering||Sticking HYL|
|Max Operation||power 12 kW|
|Max operating temperature||1200 °C|
|Heating elements||Silicon carbide elements (12 elements)|
|Inner Chamber diameter||200 mm|
|SAMPLE WEIGHTING SYSTEM|
|Max Weight||30 kg|
|HEAD MEASURING DEVICE|
|Differential pressure transducer||0 – 20 mbar||——||—–|
|Linear transducer||0 – 75 mm||——||—–|
|Sample loading max||100 kg displayed kPa||250 kg displayed kPa|
|Reaction tube||“double wall” type|
|Sample Mass||1,2 kg||2.0 kg||1.2 kg|
|Pellet size||10-12,5 mm|| 50% 10 – 12,5 mm
50% 12,5 – 16 mm
| 50% 9,5 – 12,7 mm
50% 12,7 – 15,9 mm
|Test Temp (C°)||1050 ± 10 °C||850 ± 5 °C||950 ± 5 °C|
|Reduction Time||Until 80% reduction||60 min + time until 95% reduction||Until 90% reduction|
|Gas Composition Mix||D||F||S|
|Gas Flow rate (nL/min)||83 ± 1 nl/min||40 ± 0.5 nl/min||55 ± 0.5 nl/min|
|MAIN POWER:||380 V 3 Ph + Neutral (12 kW max)|
|Gas Mix Composition %|