The main components of calcium silicon granules are silicon (Si) and calcium (Ca). The silicon content is usually around 55-65%, and the calcium content is around 24-30%. The ratio of these two elements has a key influence on the performance of casi granules. In addition to silicon and calcium, it may also contain a small amount of impurity elements such as iron (Fe), aluminum (Al), etc., but their content is generally controlled at a low level.

At room temperature, calcium silicon granules have good chemical stability and are not easy to react violently with oxygen, moisture, etc. in the air. However, in special environments such as high temperature or humidity, the Si and Ca in the calcium silicon granules may react with the surrounding substances. For example, in a high-temperature steelmaking furnace environment, calcium silicon granules will react with oxygen, sulfur and other elements in molten steel to play its deoxidation and desulfurization functions.

calcium silicon granules

chemical composition

Brand	Chemical Composition %
	Ca	Si	C	Al	P	S
	≥	≥	≤
Ca31Si60	31	55-65	1.0	2.4	0.04	0.06
Ca28Si60	28	55-65	1.0	2.4	0.04	0.06
Ca24Si60	24	55-65	1.0	2.5	0.04	0.04
Ca20Si55	20	50-60	1.0	2.5	0.04	0.04
Ca16Si55	16	50-60	1.0	2.5	0.04	0.04

The production process of casi cored wire usually includes the following steps

Prepare raw materials

Select appropriate casi alloy granules and strip steel. The chemical composition and size of silicon calcium alloy granules need to meet the requirements. Strip steel usually uses low carbon steel, and its width and thickness are determined according to the specifications of the cored wire.

Make alloy powder

Crush and grind the calcium silicon alloy granules to make casi alloy powder that meets the requirements. The size of the alloy powder is usually within a certain range to ensure its uniform distribution in the cored wire.

Strip steel pretreatment

Clean and anneal the strip steel to remove oil and impurities on the surface and improve its toughness and ductility. Annealing can also eliminate the internal stress of the strip steel and prevent breakage during the winding process.

Wrapping forming

Fill the alloy powder into the strip steel, and then wrap the strip steel around the alloy powder through the wrapping machine to form a cored wire. During the winding process, it is necessary to control the tightness and uniformity of the wrapping to ensure the quality of the cored wire.

Welding sealing

Weld the cored wire that has been rolled to prevent alloy powder leakage. Welding usually uses methods such as argon arc welding or laser welding to ensure the quality and sealing of the welding.

Drawing process

The welded calcium silicon cored wire is drawn to reduce its diameter and increase its strength. Drawing process usually adopts a multi-pass drawing method, and the deformation of each drawing gradually decreases to avoid the cored wire from breaking.

Inspection and packaging

The drawn cored wire is inspected, including chemical composition analysis, size detection, appearance inspection, etc. The qualified cored wire is packaged, usually by winding or coiling, for easy storage and transportation.

Powerful company introduction

Henan Aon Metal and Materials Co., Limited: Located in Anyang, Henan, it has been engaged in ferroalloy production for many years. It has modern production equipment and strong technical force. Its product quality is excellent and it is deeply trusted by users. Its calcium silicon cored wire and other products have a stable supply and can also be processed and produced according to customer requirements.

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