Refractories For Electric Furnace

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We provide you with refractory materials of corresponding products according to the use of different positions of the electric furnace.

Refractories For EAF Side Wall

Especially S-NSA has developed as especially for side wall hot spots in bricks for electric arc furnace. In order to meet variety of needs, YOTAI supplies plenty of variations by replacing grade of raw materials or quantity of carbon, introduced below.

Feature of S-NSA

Base of carbon content is set as 20% to take advantage of carbon characteristics.
Varieties of brands are developed by corporate with different grades of raw materials and carbon contents.
High durability is carried out for hot spots by adopting high purity materials and dense construction.
Bricks used for except hot spots are took into account of balance and durability and cost by replacing grade of materials.
Low carbon type supports for oxidization damage by oxidization slag.

Technical data of side wall refractories

	S-NSA-320X	S-NSA-220X	S-NSA-120X	S-NSA-120XMA
Chemical Composition (%)
MgO C	76 20	76 20	77 20	78 20
Physical Property
Bulk Density Apparent Porosity (%)	2.85 3.0	2.88 3.0	2.90 3.0	2.95 3.0
CCS (MPa)	30	30	35	40
Use	FB, ML	SL, ML	HS, SL	HS , SL
Feature	Low cost	General	Corrosion resistance	Corrosion resistance

	S-NSA-130X	S-NSA-115XMA	S-NSA-110XMA	S-NSA-108XMA
Chemical Composition (%)
MgO C	65 28	82 15	85 10	89 8
Physical Property
Bulk Density Apparent Porosity (%)	2.78 3.0	3.00 3.0	3.07 3.0	3.18 2.0
CCS (MPa)	35	40	45	50
Use	HS	HS, SL	SL	SL
Feature	High C quantity For HS	General for DC furnace	General for DC furnace Peroxide resistance	For DC furnaces Peroxide desistance

FB: Free board part ML: Metal line part SL: Slag line part HS: Hot spot part

Refractories For EAF Bottom Tap Hole（E.B.T）

Eccentric bottom tapping has been applied as a latest technology. High resistances to corrosion, spalling, oxidation are required for refractories for E.B.T. YOTAI provides the best material for each sections.

Refractories for DC EAF(MgO-C bricks )

Refractories for EAF hearth

Stamping material for EAF hearth

1 Wet type of stamping material

2 Dry Type Stamping Material

Wet type of stamping material, which magnesia is mixed with bittern solution and molded by rammer, is generally used for lining material for hearth of electric arc furnace. However, in case of severe operation conditions on hearth of DC furnace or any, dry type of magnesia-dolomite stamping material which emphasizes sinterability is mainly chosen. YOTAI supplies kinds of materials introduced below.

Wet Type Stamping Material

Superior in slag corrosion

resistance.

Grades are divided by

magnesia raw material.

Mix after adding bittern

solution or Magnesium

Chloride powder with water

Constructed by rammer or

vibrating stamping machine.

Dry Type Stamping Material

Superior to sinterability.

Dense and high intensity construction can be offered.

Grades are divided by amount of dolomite material.
Constructed by vibration fabrication in dry condition.

Refractories for EAF repairing

Gunning materials for EAF

These materials are applied for hot gunning for electronic furnace repair, and used of basic gunning material in general. Yotai consider for various kind of materials and develop the materials to get the satisfaction by user, and the introduction is mentioned as below.

Features

We have general type using virgin materials, and cost cut type using recycled materials.
Our general type has Magnesia G-E series for corrosion resistance, Magnesia dolomite G-MD/HD series for Sinterability to wall of furnace and Magnesia spinel type of G-E1SP/BSP8 for suitable to operation in low C/S slag line.
Our cost down type has Magnesia Chrome G-R2Y, that is made by recycled material. The recycled material after using at the furnace is provided by steel manufacturer, and is done for sizing and grading.

Chemical composition, grain composition and features

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