30+ YEARS OF EXPERIENCE IN CARBON INDUSTRY

Anthracite serves as an essential aggregate in the production of electrode paste. While various regions in China produce anthracite, the properties of the material can differ significantly, even though all are classified as "anthracite."

PREMIUM ECA · HIGH PERFORMANCE RAW MATERIAL

After being calcined in a rotary kiln,Ningxia anthracite can serve as a recarburizer. Its carbon content can exceed 90%, with 93% carbon content being the most common specification for export. Ningxia Taixi ECA is characterized by low ash, low sulfur, and low phosphorus content, as well as high electrical conductivity and high mechanical strength. Its electrical resistivity typically falls within the range of 500–580 μΩ·m. When used as an aggregate for electrode paste, it ensures a dense structure after baking, uniform electrical conductivity, stable downward movement of the electrode during operation, and a reduced risk of soft breakage. It is well used for enclosed submerged-arc furnaces, RKEF FeNi smelting, and high-load ferrosilicon production. It is also a preferred choice for high-end export-grade electrode paste, with many overseas clients specifically favoring electrode paste based on Taixi anthracite. However, resources of Ningxia Taixi anthracite are scarce, supply is subject to significant fluctuations, and prices tend to be higher, a situation further compounded by increasingly strict regulatory controls in recent years.

KEY MATERIAL CHARACTERISTICS

COST-EFFECTIVE · STANDARD INDUSTRIAL APPLICATION

Shanxi anthracite is in abundant supply and offers a high price performance ratio, making it suitable for use in standard open-type submerged arc furnaces. It provides a cost advantage. However, because it lacks stringent requirements regarding alloy impurities, poor quality control can easily lead to issues such as high electrical resistance, excessive consumption, and an increased risk of electrode breakage. In short, while Ningxia anthracite once calcined, can be utilized across a wide range of industrial applications, Shanxi anthracite sees limited industrial use due to its less-than-ideal quality.

RONGXIN CARBON

Consistent Raw Material Selection

Rongxin Carbon consistently uses high-quality ECA from Ningxia as the aggregate for its electrode paste. The superior performance of this ECA based electrode paste has been recognized by numerous clients.