Iron Pyrite-steelmaking/casting Sulfurizing Agent

Product Overview

Iron Pyrite (FeS2) functions as a direct metallurgical sulfur addition agent in secondary steelmaking and iron foundry operations. It provides a stable, controllable source of sulfur to adjust chemical composition, optimize microstructure, and enhance mechanical properties without introducing unwanted slag-forming oxides or metallic impurities.

Processed directly from our captive mineral resources and dedicated processing plants through multi-stage crushing, magnetic separation, and precision screening, this material delivers predictable dissolution rates in electric arc furnaces (EAF), induction furnaces, and ladle metallurgy furnaces (LMF).

Key Features & Benefits

Controlled Sulfur Recovery

Delivers high dissolution efficiency with minimal sulfur fade, ensuring tight final-analysis control in the molten bath.

Low Trace Element Impurities

Strict ore selection from our mining operations keeps deleterious elements (As, Pb, P) below critical thresholds, preventing hot shortness in steel and graphite degradation in iron castings.

Optimized Granulometry

Processed to precise size fractions with minimized fines, reducing dusting losses during charging and pneumatic injection.

Low Moisture Content

Industrial rotary drying and sealed packaging prevent caking, ensuring smooth flow through automated batching systems and protecting refractory linings from moisture-induced expansion.

Applications

Free-Cutting Steel Production

Function: Combines with manganese to form evenly dispersed Manganese Sulfide (MnS) inclusions.
Result: Breaks chips during machining, extends tool life, and improves surface finish on carbon and alloy steel components.

Ductile Iron & Gray Iron Foundries

Function: Balances trace sulfur levels in low-sulfur base irons prior to magnesium treatment or inoculation.
Result: Suppresses subversive pearlite-destroying elements, prevents chunky graphite formation in heavy-section ductile iron castings, and stabilizes matrix structure.

Special Alloy Steel Smelting
Function: Tailor-made sulfur adjustments for corrosion-resistant and specialized alloy formulations.

Technical Specifications

Parameter	Standard Grade	Premium Low-Impurity Grade	Test Method
Total Sulfur (S)	>= 45.0%	>= 48.0%	Iodometric Titration / Combustion
Iron (Fe)	38.0% - 42.0%	40.0% - 44.0%	ICP-OES / Complexometric Titration
Arsenic (As)	<= 0.05%	<= 0.01%	Atomic Fluorescence Spectrometry
Lead (Pb)	<= 0.08%	<= 0.02%	Atomic Absorption Spectrometry
Phosphorus (P)	<= 0.03%	<= 0.01%	Molybdovanadate Photometry
Moisture (H2O)	<= 0.5%	<= 0.2%	Gravimetric Analysis (105 deg C)
Standard Sizing	1 - 3 mm, 3 - 10 mm, 10 - 50 mm (Custom sizes available)	Mechanical Sieving

Manufacturing & Quality Control

Our industrial mineral processing operations maintain full vertical integration from raw ore extraction to final sizing:

Ore Beneficiation: Raw iron pyrite extracted from our mineral deposits undergoes primary jaw crushing, secondary cone crushing, and wet magnetic separation to remove gangue minerals and silicate rock.

Thermal Drying: Industrial rotary drum dryers reduce moisture levels below 0.5% prior to final screening.

Granulation & Classification: Multi-deck vibrating screens separate materials into precise particle size distribution ranges, removing undersized dust to prevent furnace carryover.

Batch Testing: Every 20-metric-ton production lot is sampled using multi-point cross-section core sampling. X-ray fluorescence (XRF) and titration assays are performed in our facility laboratory to verify S, Fe, As, and Pb levels before packaging. A batch-specific Certificate of Analysis (COA) ships with every order.

Customization & OEM Services

Particle Size Engineering: Custom crushing and pulverizing available for cored wire manufacturing (e.g., -200 mesh or -325 mesh) or specialized pneumatic injection systems.

Packaging Configurations

25 kg multi-wall paper bags on heat-treated wooden pallets.
1,000 kg / 1,200 kg polypropylene jumbo bags (supersacks) with bottom discharge spouts and moisture-proof inner liners.
Steel drums for moisture-sensitive export logistics.

Private Labeling: Custom stenciling, barcode labeling, and pallet wrapping aligned with client warehouse receiving protocols.

Frequently Asked Questions

Q: How does your manufacturing process control trace impurities like arsenic and lead?

A: We utilize hand-sorted and magnetically separated raw mineral feedstocks originating from our dedicated low-impurity ore bodies. Multi-stage washing and gravity separation remove host rock minerals, keeping trace As and Pb well below standard threshold limits for steelmaking additions.

Q: What is the standard moisture level, and how is caking prevented during ocean transit?

A: Bulk moisture is maintained below 0.5% via controlled rotary drying at our plant. Packaging utilizes heavy-duty woven polypropylene jumbo bags equipped with polyethylene inner liners and heat-sealed closures to prevent atmospheric humidity ingress during maritime shipping.

Q: Can you customize the particle size distribution for cored wire injection?

A: Yes. We operate dedicated roller mills and air-classifier grinding circuits capable of producing fine powders (0 - 1 mm or custom mesh sizes) specifically tailored for filling steel cored wire used in ladle metallurgy injection.

Q: What is the minimum order quantity (MOQ) for trial evaluation?

A: The standard trial MOQ is 1 metric ton (packaged in 1,000 kg supersacks or 25 kg bags on a pallet), allowing metallurgical labs and foundry engineers to run full furnace melt trials and verify recovery rates.

Q: Do you provide a batch-specific Certificate of Analysis (COA) prior to shipment?

A: Every production lot undergoes testing by our internal laboratory. A physical COA detailing exact percentages of S, Fe, As, Pb, P, and moisture is sent via email upon dispatch and included in the shipping documentation pouch.

Q: What are the typical lead times for FCL (Full Container Load) sea freight?

A: Standard production and port delivery for FCL orders (20 metric tons) take 14 to 21 days from order confirmation. Stocked standard grades (1 - 3 mm and 3 - 10 mm) ship within 7 business days from our warehouse.

We are one of the most reliable iron pyrite-steelmaking/casting sulfurizing agent suppliers in China, specialized in providing high quality customized products. Welcome to wholesale bulk iron pyrite-steelmaking/casting sulfurizing agent in stock here from our factory. If you have any enquiry about free sample, please feel free to email us.

High grade Pyrite, Ferro Sulphur, Black Iron Sulfide