Metallurgical Refractory Material Slag Blocking Dart for Converter
Metallurgical Refractory Material Slag Blocking Dart for Converter
Product Description
Slag darts are refractory shapes that are used during the production of steel in the basic oxygen furnace (BOF) process. They are designed to float at the interface between the liquid steel and slag in the furnace and minimise the amount of slag that is carried over to the ladle during the tapping process. The slag dart is inserted mechanically into the taphole toward the end of the tapping operation. When the steel is drained from the furnace it seals the taphole thus holding back the slag. Slag is an undesirable element that will lead to impurities and a subsequent reduction in steel quality.
Many Size for your choice!!!
220mm, 240mm, 260mm, 280mm,300mm, 320mm, all types of slag dart are according to customer's requirement. our slag dart for all taphole sizes.
Technical Data
Ltem | Cone | Guide bar |
Al2O3 % | ≥85 | ≥65 |
SiO2 % | 3~8 | 10~13 |
TiO2 % | ≤3 | ≤3 |
CaO % | ≤4.5 | ≤4.5 |
Bulk Density g/cm3 | 3.4~4.2 | ≥3.2 |
Cold Crushing strength MPa | ≥60 | ≥55 |
Features
The new technology reduced the energy consumption, reduced the molten steel temperature loss, increased the steel-making operation security.
Product Display
Application
The Slag dart for Converter to resemble a gyroscope with a small diameter guide rod of refractory products.Because of the high accuracy of the release, the slag residues are good, which can damage the eddy current of the molten steel, reduce the slag, effectively improve the purity of the steel water, and reduce the steel water return to phosphorus, which is widely used now.
Application Method
Method of use of slag darts:
1) slag dart placement must be accurate, to ensure smooth into the tapping hole guide bar, so after each converter for a new tapping hole should be repositioned, namely in the condition of empty furnace, with a slag dart (rod instead of the slag retaining wall can use 1), to simulate a slag, slag stem from the smoothly through the tapping hole is center, has fallen into the pit furnace, namely regards positioning success, if not.It can be reorientated by adjusting the travel of mobile trolley or guide rail.
2) to ensure the quality of the slagging darts, not only the material proportion is suitable, but the gap between the guide rod and the darting dart body must be filled with refractory clay to dry.Otherwise, the steel water will melt the steel bar inside the guide bar when it is slightly longer in the molten steel.The guide bar breaks off the guiding role, the slag darts body cannot sit accurately to the steel outlet, causing the slag failure.
3) the timing of the release of slag darts must be well timed, and the slag darts will be melted in the early stage, which will lead to the slagging effect.
4) keep the slag darts clamping device clean and not sticky steel, otherwise it will lead to the failure of the slag darts.Failure to prevent slag.
Packaging and shipping
1.Packing: To be packed in standard packing, suitable for long distance ocean transportation and well protected against damage, moisture, shock, rust.
2.Delivery Detail: 15 working days after payment.
Quality Assurance
Lite Refractory is committed to high quality standards for all its products and services. With its thirst on State of the art technology at every level and a wide range of products, Lite Refractory can provide ideal solutions for the stringent requirement of the customer. Backed by decade of experience in different industries, and close association with customers,Lite Refractory will always bring new products which will give better life and value to the user.
Henan Lite Refractory Material Co., Ltd is located in Zhengzhou Henan province,which is one of the main refractory production bases in China.
Pengfei Zhang the manager of our company,has been engaged in refractory material industry for more than 15 years.In the technological team there are more than 10 senior designers and engineers,more than 20 technicians.
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