Silicon metal 553 without oxygen is a type of silicon metal, where "553" represents the content range of its main chemical components. It is a silicon metal product produced without oxygen-free process conditions. Silicon is the main component, and its content is generally around 98.5% - 99.0%, which provides a sufficient source of silicon for many applications.

Impurity elements contain a certain amount of impurities such as iron (Fe), aluminum (Al), and calcium (Ca). The iron content is usually 0.5% - 0.8%, the aluminum content is about 0.3% - 0.5%, and the calcium content is around 0.3%. These impurity elements will have a certain impact on its performance and application.

Impact of no oxygen: Since there is no oxygen-free process in the production process, the removal effect of impurities is relatively weak during the reaction in the furnace. In particular, the content of impurities such as carbon (C) may be slightly higher than that of oxygen-free silicon metal 553. During the crystallization process, the crystal structure of silicon may also be slightly worse due to the lack of optimization effect of oxygen permeation, resulting in the product purity and quality being lower than that of oxygen-permeated metal silicon 553 to a certain extent.

Silicon metal 553 without oxygen

chemical composition

Silicon Metal	Grade	Chemical Composition
		Si(%)	Impurity Content
		Si(%)	Fe(%)	Al(%)	Ca(%)	P(PPM)
	97	>97.0%	≤1.5	≤0.5	≤0.3
	553	>98.5%	≤0.5	≤0.5	≤0.3	-
	441	>99.0%	≤0.4	≤0.4	≤0.1
	3303	>99.3%	≤0.3	≤0.3	≤0.03	≤50
	2502	>99.5%	≤0.25	≤0.25	≤0.02	≤40
	2202	>99.5%	≤0.2	≤0.2	≤0.02	≤40
	421	>99.2%	≤0.4	≤0.2	≤0.1	-
	411	>99.2%	≤0.4	≤0.1	≤0.1	-

Products Applications

Steelmaking applications:

In the steelmaking process, non-oxygenated silicon 553 can be used as a deoxidizer and alloy additive. As a deoxidizer, silicon can react with oxygen in molten steel to reduce the oxygen content in molten steel, reduce oxide inclusions, and improve the purity of steel. However, due to its relatively high impurity content, it may not be as suitable as oxygen-permeated silicon metal 553 in the production of special steels with extremely high steel quality requirements. As an alloy additive, it provides silicon elements to steel and enhances the strength, hardness and other mechanical properties of steel. For example, in the production of ordinary carbon steel and some alloy steels that are not very sensitive to impurities, it can be used to adjust the silicon content and improve the performance of steel.

Casting applications:

In the casting process, it can be used as an inoculant and alloying material. As an inoculant, it can promote graphitization in cast iron, make graphite flakes small and uniform, reduce the tendency of white cast iron, and improve the mechanical properties of cast iron. In the production of ductile iron, it can be used in combination with a spheroidizing agent to improve the structure and properties of ductile iron, and to increase the spheroidization rate and casting quality. However, compared with oxygen-permeable 553 metal silicon , the influence of its impurities may need to be considered when producing high-quality casting products.

Restrictions on silicone production:

In silicone production, non-oxygen-permeable metal silicon grade 553 can also be used as a raw material, but due to its slightly lower purity, it may have a certain impact on the quality of silicone products. For example, when producing high-quality silicone compounds, impurities may interfere with chemical reactions and affect the performance of products, such as reducing the high temperature resistance, low temperature resistance, insulation and other properties of silicone products. However, it can still be used in some fields where the quality requirements for silicone products are not very high.

Situation in the production of silicone rubber and silicone oil:

In the manufacture of silicone rubber and silicone oil, it can provide a source of silicon elements. However, compared with oxygen-permeable 553 grade metal silicon , the quality of silicone rubber and silicone oil products produced may be slightly inferior. For example, it may not be suitable for the production of high-purity silicone rubber for use in medical equipment and other fields with high purity requirements; however, it can still be used in the production of some industrial silicone oils as long as the product performance requirements are not particularly high.

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