Anhui Yuntian Metallurgy Technology Co., Ltd
High Temperature Resistant Refractory Slag Limiting Dart for BOF
  • High Temperature Resistant Refractory Slag Limiting Dart for BOF
  • High Temperature Resistant Refractory Slag Limiting Dart for BOF
  • High Temperature Resistant Refractory Slag Limiting Dart for BOF
  • High Temperature Resistant Refractory Slag Limiting Dart for BOF
  • High Temperature Resistant Refractory Slag Limiting Dart for BOF
  • High Temperature Resistant Refractory Slag Limiting Dart for BOF
High Temperature Resistant Refractory Slag Limiting Dart for BOFHigh Temperature Resistant Refractory Slag Limiting Dart for BOFHigh Temperature Resistant Refractory Slag Limiting Dart for BOFHigh Temperature Resistant Refractory Slag Limiting Dart for BOFHigh Temperature Resistant Refractory Slag Limiting Dart for BOFHigh Temperature Resistant Refractory Slag Limiting Dart for BOF

High Temperature Resistant Refractory Slag Limiting Dart for BOF

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


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    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 NameSlag dart  Slag Stopping Plug  Slag Control Dart
    Total Length1100~1680mm
    Height of Head150mm-230mm, according to drawing
    Diameter of Head200-350mm, according to the size of tapping hole
    Density of Head3.1-4.0g/cm3
    Density of Tail2.8g/cm3
    Temperature Application1790℃
    CCS≥20 MPa
    Note: All of these could be customized according to customer's requirements.


    Darts head (Chemical Analysis)

    Name of composition%
    Al2O338 Min
    MgO38 Min
    SiO28.0 Min
    Fe2O33~5


    Darts tail (Chemical Analysis)

    Name of composition%
    Al2O342 Min
    MgO39 Max
    SiO27 Min


    Supplementary Properties

    NameDescriptionIndex
    BD g/cm3Dart head3.8  Min
    Dart tail2.7  Min
    Service Temperature ℃Dart head1750 Min
    Dart tail1750 Min
    CCS kg/cm2Dart tail70.0 Min
    Dart tail70.0 Min

    Slag Dart is usually used in converter tapping process. Blocking slag in tapping process reduces phosphorus in molten steel, and increase the alloy consumption; reduces various objects mixing into steel, improves the steel quality; reduces slag sticking in the ladle, improves the ladle life; reduces refractory consumption, and providing better conditions to refine steel. 


    Slag Dart

Description

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.


Specification

Slag Dart is usually used in converter tapping process. Blocking slag in tapping process reduces phosphorus in molten steel, and increase the alloy consumption; reduces various objects mixing into steel, improves the steel quality; reduces slag sticking in the ladle, improves the ladle life; reduces refractory consumption, and providing better conditions to refine steel. 


Diagram
Photometrics
Packing & Accessaries

Slag Dart

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