10-100mm Silicon Metal 553 Grade is mainstream medium-purity furnace lump . Grade naming rule: Fe≤0.5%, Al≤0.5%, Ca≤0.3%, minimum silicon content ≥98.5%. The 10–100mm full-size block is specially customized for large static melting furnaces, widely recognized as cost-balanced raw material for ADC12 cast aluminum, ordinary organosilicon and pre-purification polysilicon production.

Compared with low-purity Si97 (high Fe/Ca impurities), Si553 effectively avoids casting pinholes and silicone catalyst poisoning; compared with high-purity Si441, it has obvious cost advantages for mass medium-end industrial production. 10–100mm large lump features low specific surface area, slow oxidation loss during high-temperature feeding, no automatic feeding machine blockage, suitable for 3-ton and above continuous melting furnaces. Our factory supplies standard 10–50 / 10–100mm blocks and accepts customized splitting sizes.

10-100mm silicon metal 553 grade

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 Use

Aluminum alloy production:

It is one of the commonly used alloy additives in aluminum alloy production. In the aluminum alloy smelting process, silicon 553 can improve the strength, hardness and wear resistance of aluminum alloy, and also improve its casting performance and corrosion resistance. Add silicon metal 553 with a particle size of 10-100mm into the aluminum alloy melting furnace, melt it at high temperature and fully mix it with aluminum liquid. After stirring, refining and other processes, you can get aluminum alloy products with excellent performance.

Polysilicon production:

As one of the important raw materials for the production of polysilicon. Polysilicon is the basic material for the production of monocrystalline silicon and solar cells. In the production process of polysilicon, silicon metal 553 needs to be further purified and processed to remove impurity elements and improve the purity of silicon. Metal silicon 553 with moderate particle size is conducive to material transmission and reaction during the purification process, thereby improving the production efficiency and quality of polysilicon.

Organosilicon synthesis:

Participate in the synthesis reaction of organosilicon compounds. Organosilicon has excellent properties such as high temperature resistance, low temperature resistance, aging resistance, and electrical insulation, and is widely used in aerospace, electronics, construction, automobiles and other fields. Metal silicon 553 reacts with organic reagents such as methyl chloride under the action of a catalyst to generate various organosilicon compounds, such as methylchlorosilane, phenylchlorosilane, etc. These organosilicon compounds can be made into organosilicon products with different properties and uses through further polymerization, modification and other processes.

Refractory manufacturing:

It can be used to manufacture high-grade refractory materials. Since silicon metal 553 has the characteristics of high melting point, high thermal stability and oxidation resistance, adding it to refractory materials can improve the high temperature resistance, corrosion resistance and mechanical strength of refractory materials and extend the service life of refractory materials. In the production process of refractory materials, the particle size of silicon metal 553 will affect its dispersibility and bonding performance in refractory materials. The particle size of 10-100mm can better meet the production requirements of refractory materials.

Advantages of 10–100mm Si553 Lump

Low High-Temperature Oxidation Loss: Less dust & burning loss than fine powder during furnace feeding, cut raw material waste;
Automatic Feeding Adaptation: Uniform large block without screen blockage for 24h continuous melting lines;
Balanced Purity & Cost: Higher purity than Si97, far lower procurement cost than Si441;
Wide Industry Compatibility: Matches aluminum foundry, silicone chemical, solar pre-processing three major downstream industries;
Stable Batch Consistency: Furnace smelting & full-spectrum inspection control small impurity fluctuation.

FAQ

Q1: What is the difference between Si553 and Si441 silicon metal? A: Si553 Fe≤0.5, Ca≤0.3, lower cost for ordinary aluminum & silicone; Si441 lower Ca (≤0.1) for high-end silicone & new energy thin-wall castings.

Q2: Why choose 10–100mm lump instead of fine powder for large static furnaces? A: Large lump small specific surface area, less oxidation loss, no feeding machine blockage, stable melting rhythm.

Q3: Recommended silicon addition ratio for ADC12 aluminum alloy? A: Target silicon content 9~12% of molten aluminum weight, adjust according recycled aluminum residual silicon.

Q4: Free test samples & delivery cycle? A: Free 0.5–5kg test samples available. Standard stock goods:7–10 working days; customized impurity grades:10–15 working days, MOQ 25 tons full container, T/T & L/C payment supported.

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