What is Calcium Silicon？
Calcium silicon is a high-quality deoxidizer and desulfurizer composed of silicon and calcium. In particular, metallic calcium has a strong affinity with oxygen.
Calcium, or limestone, has always been an essential ingredient in iron and steel making. Its use as a flux is well known. Treatment of molten steel with calcium has become an important means of deoxidation and, more importantly, desulfurization to previously unimaginable levels.
Equally important, calcium silicon is now routinely used to control the shape, size and distribution of oxide and sulfide inclusions. Immediate benefits of calcium treatment include improved flowability, simpler continuous casting processes, and improved cleanliness, machinability, ductility and impact strength of the final product.
Chemical content and specifications of calcium silicon alloy
Calcium silicate, containing 28-35% Ca, 60-65% Si and 6% Fe, is the most commonly used additive. It may contain up to 1% C and 1.5% Al. Zhenxin available in all powder sizes.
Analysis of silicon calcium price changes in January 2025
1) Chinese Domestic market price of silicon Calcium
As shown in the above figure, the mainstream transaction price of national standard CA1 in Shaanxi is 10700-10800 CNY/ton, the market transaction price of silicon calcium in Ningxia is 10700-10800 CNY/ton, and the market transaction price in Inner Mongolia is 10700-10800 CNY/ton; the market transaction price of national standard CA2 in Shaanxi is 10600-10700 CNY/ton, the market transaction price in Ningxia is 10600-10700 CNY/ton, and the market transaction price in Inner Mongolia is 10600-10700 CNY/ton; the transaction price of CA28SI55 in Henan is 9900-10300 CNY/ton, and the transaction price of CA28SI50 is 8800-9100 CNY/ton (ex-factory price including tax).
2）January Calcium Silicon Export Market Price
According to the export market transaction report data for this month, the current export transaction price of national standard CA1 is 1530-1580 USD/ton, and the national standard CA2 is 1510-1560 USD/ton (FOB price, Tianjin Port). The export price of calcium silicon has declined this month.（This data comes from the zhenxin Metallurgy market analysis team）.
3） Domestic construction starts of China’s calcium silicon alloy
According to statistics from zhenxin ferroalloy on 5 national standard silicon calcium alloy production enterprises, there were 4 silicon calcium market furnace production enterprises in January 2025, and the actual number of furnaces in operation was 6. The enterprise operation rate was about 80%, which was the same as the previous month, and the furnace operation rate was about 66.67%, which was the same as the previous month. It is estimated that the total market output in January 2025 will be about 7,500 tons, which is the same as last month.
4) Silicon calcium market forecast
The downstream demand for stocking before the New Year is relatively low, and the price of silicon calcium continues to fall slightly this month. During the second half of the month, steel mills and traders have gradually finished purchasing and stocking, and there are few inquiries in the silicon calcium market, and the price remains stable. Silicon calcium plants are operating normally during the Spring Festival, and the oversupply phenomenon in the market may intensify after the festival. If there is no fundamental improvement in supply and demand, it will be difficult to boost prices.