Slag regulating material for converter slag splash protection

Slag splashing furnace protection is a new technology developed this year to increase converter age. The basic principle is that after the final molten steel is blown, the remaining MgO content reaches the saturated or supersaturated final slag, and a high-pressure nitrogen gas of 0.8-0.9 MPa is blown at 0.8-2.0 m at the theoretical level of the molten pool using a spray gun , Spatter the slag and form a layer with a high melting point on the surface of the furnace lining. The slag-spattering layer adheres well to the furnace lining to protect the furnace lining.
The effect of slag splashing furnace protection is mainly determined by the MgO content in the slag before slag splashing. The addition of slag regulator can increase the MgO content in the slag. There are two ways to add it: adding slag adjuster after tapping to make the MgO content meet the requirements of slag splashing furnace protection; when the converter is blowing, add the slag adjuster and the slagging material into the furnace and control the final slag composition to make the MgO content meet the requirements. The commonly used slag conditioner and its chemical composition are shown in Table 1. When selecting a slag conditioner, the MgO content in the slag conditioner and its price should be comprehensively considered.

Table 1 Commonly used slag conditioner and its chemical composition（w）

Raw Material	CaO	SiO2	MgO	LOI	MgO
Metallurgical magnesia	8.0	5.0	83.0	0.8	75.8
Light burned magnesia ball	1.5	5.8	67.4	22.5	56.7
Light burned dolomite	51.0	5.5	37.9	5.6	55.5
Magnesium-containing lime	81.0	3.2	15.0	0.8	49.7
Raw dolomite	30.3	2.0	21.7	44.5	28.3
Magnesite slag grains	0.8	1.2	45.9	50.7	44.4

Article Source:Slag regulating material for converter slag splash protection
Company name：Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email:?sales1@chinafirebrick.com
Website: http://www.cxrefractories.com/

Brief Introduction for EAF refractories

EAF(Electric Arc Furnace) is mainly used for steelmaking industry, main raw material of which is scrap.According to power types, EAF are mainly divided into DC EAF and AC.
Same as other high temperature induction furnaces, refractory materials are widely used in EAF. EAF refractory materials are mainly as following,
1.DC EAF
Magnesia, magnesium carbon, magnesium aluminum and magnesium chrome refractories are widely used in DC EAF. Alkaline bricks without carbon is widely used in Europe, while in Japan, thermal shock resistance is thought as a great question, so they prefer to use magnesium carbon bricks with high carbon content. In order to improve thermal shock resistance and corrosion resistance of metallurgical equipment, magnesia spinel materials and magnesia-chrome brick are widely used in Europe.

2.AC EAF
For small AC EAF, asphalt brick, magnesium carbon brick, magnesia gun mix are widely used at furnace wall. For ultra-high power electric AC EAF, high-quality magnesium carbon brick would be used for furnace wall, while for slag line, higher performance high-magnesium carbon brick would be needed. Out of magnesia carbon bricks, magnesia gun mix would be used to repair furnace wall during working.
We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality magnesia carbon bricks are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner.

Article Source:magnesium carbon bricks
Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/