High Temperature Resistant Refractory Slag Limiting Dart for BOF

In Stock: 1mil Piece
$1 /Piece
Manufacturing & Processing Machinery Metallurgy Machinery
Item Code: # 6790
75
Condition: New (In original box )
Last Visit 14-06-2019

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

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.

Technical Parameter

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

Application

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. 

Yuntian is a leading manufacturer of slag dart machine, slide gate plate and slag stopping ball in China. If you want to know more about the products, you can contact us or visit our factory. We will use our professionalism to provide you with quality service.

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