CastingLadle Covering Agent Carbon-Free Covering Agent

Ladle Covering Agent (also known as Ladle Insulating Powder) is a specialized refractory auxiliary material designed for the steelmaking and continuous casting processes. It is applied onto the surface of molten steel in the ladle to form a protective layer.
Our premium covering agent provides superior thermal insulation, prevents secondary oxidation, and absorbs non-metallic inclusions (such as Al₂O₃), ensuring high steel cleanliness and minimal temperature loss during transportation and refining.

SiO2 (%):	40 - 45
CaO (%):	15 - 25
Al2O3 (%):	10 - 15
Fe2O3 (%):	≤ 2.0
Moisture:	≤ 0.5
Total Carbon (T.C):	12 - 17%
Bulk Density:	≤ 0.8g/cm³
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Model:
LCA01

Product Description

Product Introduction: High-Performance Ladle Covering Agent

Covering agent Introduction:

The ladle covering agent is added on the surface of the molten steel in the ladle, and its main function is heat insulation. The three basic functions it must have are:

(1) Maintain a heat-insulating and heat-insulating powder layer on the liquid slag layer to prevent the molten steel from transmitting or radiating heat to the air. Thermal insulation performance is the most important technical index of ladle covering agent, which can reduce the tapping temperature, save energy consumption and increase production.

(2) Isolate the contact between molten steel and surrounding air.

(3) No erosion or less erosion of the lining, no crusting after pouring, and easy to fall off from the lining.

In addition to the above basic functions, some conditions must be met as a covering agent for the production of clean steel:

(1) Molten steel must not be polluted. The carbon in FeO, MnO and SiO2 in the slag is in contact with the molten steel, which may increase the carbon content of the molten steel. Therefore, it is necessary to reduce the content of FeO, MnO and SiO2 in the covering agent, control the particle size, content and fluctuation of the liquid level of the carbon material, and reduce the pollution to the molten steel.

(2) It can absorb inclusions in molten steel, such as Al2O3, etc. With the development of continuous casting and rolling and the production of ultra-low carbon steel and alloy steel, the design, research, development and use of ladle covering agents are also very active.

Product Overview

Ladle Covering Agent (also known as Ladle Insulating Powder) is a specialized refractory auxiliary material designed for the steelmaking and continuous casting processes. It is applied onto the surface of molten steel in the ladle to form a protective layer.

Our premium covering agent provides superior thermal insulation, prevents secondary oxidation, and absorbs non-metallic inclusions (such as Al₂O₃), ensuring high steel cleanliness and minimal temperature loss during transportation and refining.

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✨ Key Features & Benefits

| Excellent Insulation：Reduces molten steel temperature drop by **15-25°C per heat**, saving energy and improving casting stability.

|️ Oxidation Prevention：Forms a dense liquid slag layer that isolates steel from air, preventing re-oxidation and alloy loss.

| Inclusion Absorption：High basicity formulation effectively absorbs alumina and other inclusions, improving steel purity.

|⚡ Rapid Melting： Quick slag formation (30-50 seconds) ensures immediate protection after tapping.

| Eco-Friendly Options：Available in **Fluorine-Free** and **Low-Carbon** formulations to meet environmental standards.

| Good Spreadability： Lightweight bulk density ensures even coverage over the entire steel surface with low consumption.

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Technical Specifications

Parameter	Unit	Standard Type	Exothermic Type	Low Carbon Type
SiO₂	%	40 - 45	35 - 40	40 - 45
CaO	%	15 - 25	20 - 30	15 - 25
Al₂O₃	%	10 - 15	10 - 15	10 - 15
Total Carbon (T.C)	%	12 - 17	10 - 15	≤ 5.0
Fluorine (F)	%	8 - 12	5 - 10	≤ 0.5
Fe₂O₃	%	≤ 2.0	≤ 2.0	≤ 1.5
Melting Point	°C	1250 - 1350	1200 - 1300	1250 - 1350
Bulk Density	g/cm³	≤ 0.8	≤ 0.9	≤ 0.8
Moisture	%	≤ 0.5	≤ 0.5	≤ 0.5
Particle Size	mm	0 - 3 / 0 - 5	0 - 3 / 0 - 5	0 - 3 / 0 - 5