Slag Dart also known as slag stopping plug, slag control dart, Slag Limiting Dart, Slag Control Refractory Darts. Slag blocking darts are cone shapes with slots and its density leads to float at the interface between the liquid steel and slag in the furnace.
Features:
•Higher bulk density
•More resistant to impact, burst and erosion
•Customize slag darts used for 30-300 ton BOF converts based on your requirements
In the converter steel-making processing, a large amount of molten steel slag is produced when smelting in the BOF. The slag dart is a cone shaped plug with a refractory covered guiding rod, it has three slot design which is enough for the liquid metal to flow and block the slag. The slag dart is inserted into the taphole toward the end of the tapping operation by slag blocking dart application machine to block slag inflow ladle, the performance can be increased to 96%, Slag layer< 40mm. The slag dart has an obvious effect on increasing steel yield and purity as well as the quality and mechanical performance of steel.
Technical Specification Table | |
Item Name | Slag dart Slag Stopping Plug Slag Control Dart |
Total Length | 1100~1680mm |
Height of Head | 150mm-230mm, according to drawing |
Diameter of Head | 200-350mm, according to the size of tapping hole |
Density of Head | 3.1-4.0g/cm3 |
Density of Tail | 2.8g/cm3 |
Temperature Application | 1790℃ |
CCS | ≥20 MPa |
Note: All of these could be customized according to customer's requirements. |
Darts head (Chemical Analysis)
Name of composition | % |
Al2O3 | 38 Min |
MgO | 38 Min |
SiO2 | 8.0 Min |
Fe2O3 | 3~5 |
Darts tail (Chemical Analysis)
Name of composition | % |
Al2O3 | 42 Min |
MgO | 39 Max |
SiO2 | 7 Min |
Supplementary Properties
Name | Description | Index |
BD g/cm3 | Dart head | 3.8 Min |
Dart tail | 2.7 Min | |
Service Temperature ℃ | Dart head | 1750 Min |
Dart tail | 1750 Min | |
CCS kg/cm2 | Dart tail | 70.0 Min |
Dart tail | 70.0 Min |