Silicon Metal 97 is the most economical basic industrial silicon with minimum silicon content ≥97.0%. Its impurity threshold (Fe≤1.5%, Al≤0.5%, Ca≤0.3%) is higher than medium/high-purity Si553 and Si441, so it features prominent price advantages for mass low-to-medium-end metallurgy and refractory production.

Produced via submerged arc furnace carbothermal reduction with ordinary quartz and conventional coke raw materials, Silicon 97 appears dark gray metallic lumpy solid with brittle texture. Compared with Silicon 441/Silicon 553, it is not suitable for high-end organosilicon monomers or thin-wall precision aluminum castings, but perfectly matches construction aluminum ingots, ordinary cast iron, refractory additives and ferroalloy raw materials. Our factory supplies full sizes including 0~1mm powder, 1~3mm granules and 10–100 large lumps for different melting furnaces.

Silicon metal 97

chemical composition

Grade	Chemical composition	553	441	421	3303	2503	2202
	Si ≥	98.5%	99%	99%	99%	99%	99%
	Fe ≤	0.5%	0.4%	0.4%	0.3%	0.2%	0.2%
	Al ≤	0.5%	0.4%	0.2%	0.3%	0.5%	0.2%
	Ca ≤	0.3%	0.1%	0.1%	0.03%	0.03%	0.02%
	size	40-120 mesh,45-325 mesh, -200 mesh, -325 mesh.etc
	Note: All grades of silicon metal from our company can be used for processing, and the size can also be processed according to your requirements.
Package	25 kg/bag or 1 ton/bag

Large lump:10–50mm /10–100mm; Medium granule:1–3mm; Fine powder:0~1mm; Custom 40–325 mesh powder available.

Appearance: Dark gray metallic block, brittle, uniform particle after crushing, no severe oxidation crust.

Advantages of Silicon Metal 97

Ultra-Low Procurement Cost: Raw material input is far lower than Si553/441, greatly reducing mass production raw material expense;
Stable Alloying Effect for Low-Grade Aluminum: Meet the silicon content demand of building aluminum ingots without strict surface requirements;
Wide Refractory Adaptability: High-temperature oxidation resistance improves thermal stability of general furnace lining castables;
Flexible Particle Matching: Lump for static furnaces, powder for cored wire and alloy blending lines;
Stable Batch Supply: Mature smelting process, large daily output, suitable long-term bulk order cooperation.

Application field

Construction Aluminum Alloy Industry (Main Application)

Si97 is the primary silicon additive for architectural aluminum doors/windows ingots. It improves molten aluminum filling performance and meets the mechanical index requirements of low-demand aluminum profiles, significantly cutting factory raw material costs.

General Refractory Materials Production

Added to silica refractory bricks and furnace lining castables to form high-temperature anti-oxidation protective layer, reduce furnace body corrosion loss for medium-low temperature kilns.

Ferro Silicon Alloy Raw Material

As base raw material for smelting FeSi 65/FeSi 72 low-cost ferrosilicon deoxidizer for construction steelmaking.

Ordinary Cast Iron Foundries

Used as auxiliary graphitizing additive for low-standard gray iron pipe fittings and machinery castings.

Pre-Raw Material for Polysilicon Purification

After secondary slag refining and impurity removal, it can be processed into medium-purity silicon for conventional P-type solar silicon wafer pre-production.

silicon metal 97

FAQ

Q1: What's the difference between Si97 and Si553?

A: Si97 higher Fe/Al/Ca impurities with lower price, only for construction aluminum and general refractories; Si553 low impurities for automotive cast aluminum and ordinary silicone.

Q2: Can Silicon Metal 97 be used for organosilicon monomer production?

A: No. Excess calcium impurities will poison the copper catalyst in the reactor, only Si441/3303 are applicable.

Q3: Recommended silicon addition ratio for architectural aluminum ingots?

A: Target Si content 7–10% of molten aluminum weight, adjust based recycled aluminum residual silicon value.

Q4: Free test samples & delivery cycle?

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

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