Dynamic Reducibility DR 7000

For tests according to Standards to be selected among the following:
 LTD ISO 13930, RDI-DR ISO 11257, IS 10823 sec. 2

DR 5000 DR 2000 Test System

General Description

DR 7000 system is designed to operate dynamic test according to three different standards:

  • ISO 13930 Dynamic test for low-temperature reduction-disintegration – LTD
  • ISO 11257 Determination of the low-temperature reduction RDI-DR
  • IS 10823 sec. 2 Reduction Degradation

The equipment is based on an electric horizontal oven including two half cylindrical heating elements where the
rotating reaction tube is placed. The control cabinet provides for temperature, gases flow rates and tube rotation motor control.
From experiences of several laboratories involved in these tests, it has been pointed out that results reliability greatly depends on temperature and reaction gas flow rate accuracy, therefore electronic mass flow meter and high quality temperature controller are supplied.
The system needs to be feed by proper premixed reaction gas blends and pure nitrogen in bottles stack provided at customer care.

Control Cabinet

Control Cabinet includes complete top quality control and monitoring instrumentation. Temperature of sample is driven by digital programmer and controller to obtain best isothermal test condition.

A temperature alarm controller assures oven safety cutting off power in case of over temperature. Automatic inlet of Nitrogen and Reaction gas is provided according to temperature program. The power to the gear motor is also automatically supplied.

Gas flow control is obtained by a digital mass flow controller for reaction gas and by a rotameter for N2 (as option a mass flow meter also for N2 is included). Manual gas and motor control is also possible for checking purpose. A Touch screen recorder and data logger, and Ethernet connection, provide local and remote recording of test data.

Horizontal Oven

The electric oven consists of a steel structure placed on a basement and including the heating elements and insulation material.
The rotation at the proper revolution speed is provided by means of a gear motor placed inside the basement. A dust separator is placed at the end of gas line in order to collect dust and powdered matter coming from rotating tube.

DR 7000 oven

Dual Oven Version

Dual Oven version is also available

To allow simultaneous operation of two ovens running, fully independently, two tests at a time.

The system is provided with independent reacting MIX gas and Nitrogen lines, together with independent temperature control and programming units.

DR 7000 dual oven

Reaction Tube

Reaction tube is manufactured according to ISO Standard dimensions and materials: all parts operating at high temperature are made of heat resistence Stainless Steel to obtain long tube life.

Internal lifters, as required by the standard, are placed inside the tube. A gear wheel on the reaction tube gives the rotation
in connection with the geared motor in the basement.

Two heat diffusers are placed at the end of the tube in order to reduce temperature of outlet gas flow.

 

 

DR 7000 reaction tubes

STANDARDS

Test Temp. (C°)

Reduct. Time (min.)

Sample Mass (g)

Gas MIX

MIX Flow rate (nl/min)

Max N2 Flow rate (nl/min)

Rotation Speed
(RPM)

Vessel Length
(mm)

Vessel Diam.
(mm)

Vessel Lifters
(N.)

ISO 13930 (LTD)
(Low Temperature reduction-disintegration)

500 

60

500

Mix A

20

20

20 ± 0.2

540

150

4

ISO 11257 (RDI-DR)
(Reduction-Disintegration)

760

300

500

Mix E

13

13

10 ± 1

200

130

-

IS 10823 sect.2 (RDI)
(Dynamic Reduction Degradation)

550

60

500

Mix B

15

3

10 ± 0.5

200

130

4

 

Gas Mix Composition %

N2

CO

CO2

H2

CH4

MIX A

58

20

20

2

--

MIX B

70

30

--

--

--

MIX E

-

36

5

55

4

 

DR 7000 Specifications

OVEN

Max operating temperature

780 °C

External thermocouple

"K" type Inconel shielded

REACTION TUBES

Material

Stainless steel AISI 310

Internal thermocouple

"K" type Inconel shielded

GAS CONTROL UNIT 

Flow rate measuring devices

Mass Flow Meters

MAIN POWER

230 V - 50/60 Hz (6 kW max)