Pyrite for Ironmaking Blending & Sintering Auxiliary
Purchase Instructions:
We offer various specifications and forms of iron sulfide pyrite products to meet the needs of different customers. Whether you are an industrial production purchaser, a mineral collector enthusiast, or a jewelry designer, you can find suitable products here. Please feel free to contact us at any time to learn more about product details and purchasing information. We will provide you with professional services and favorable prices.
Choose our iron sulfide pyrite and let this "fool's gold" add unique value to your business or collection!
Sulfur Content: 20–35% (Medium-Low Grade, Cost-Optimized for Mass Production)
Application Scenarios (Metallurgical Focus)
Widely used in ironmaking blending and sintering auxiliary processes for steel mills and foundries, specifically supporting the production of: • Free-Cutting Steel (Y12, 1215) • Gray Cast Iron (HT200, HT250) • Ductile Iron (QT450-10, QT500-7)
Complies with YB/T 4551-2016 & ISO 9001:2015, trusted by 30+ metallurgical enterprises worldwide.
Product Overview
Our medium-low grade pyrite (FeS₂) is specifically engineered as an ironmaking blending material and sintering auxiliary, designed for metallurgical engineers and professional purchasers in steel mills and foundries. With a cost-optimized sulfur content of 20–35%, it perfectly balances performance and cost efficiency for large-scale ironmaking and sintering processes. Unlike pyrite used for abrasives or chemical applications, our product is processed to meet strict metallurgical standards—focusing on stable sulfur absorption, strict impurity control, and furnace-type matching, which are critical for sintering thermal balance, alkalinity adjustment, and partial desulfurization. Backed by 15+ years of metallurgical raw material R&D and on-site application experience, we provide tailored solutions for blast furnace ironmaking and sintering production, ensuring consistent performance and reduced operational costs.
Metallurgical LSI Keywords
#Ironmaking Blending Pyrite #Sintering Auxiliary FeS2 #Pyrite for Blast Furnace #Sulfur Enhancer for Sintering #Free-Cutting Steel Pyrite #Gray Cast Iron Blending Material #Ductile Iron Sintering Auxiliary #Metallurgical Grade Pyrite #Sintering Thermal Balance Pyrite
Core Specifications
Critical Index (Metallurgical Focus)
Typical Value
Tolerance
Impact on Ironmaking & Sintering
Sulfur (S)
20–35%
±1.5%
Cost-optimized, participates in sintering thermal balance, adjusts alkalinity
Sulfur Absorption Rate
≥88%
≥86%
Stable sulfur release, ensures uniform sintering quality, reduces raw material waste
Phosphorus (P) [Fatal Impurity]
≤0.01%
No exceeding
Avoids hot brittleness of steel, prevents furnace damage, ensures casting quality
Arsenic (As) [Fatal Impurity]
≤0.03%
No exceeding
Prevents steel brittleness, meets free-cutting steel/cast iron quality standards
10–50 mm for BF ironmaking blending; 0–15 mm for sintering auxiliary (matches 18–36 m² sintering machines)
FeS₂ Purity
≥65%
≥60%
Ensures stable reaction, reduces inert impurities in sintering process
Application in Ironmaking Blending & Sintering
Our pyrite is exclusively used as a metallurgical raw material for ironmaking blending and sintering auxiliary, with clear process positioning and data-backed performance, perfectlying the production needs of free-cutting steel, gray cast iron, and ductile iron:
1. Ironmaking Blending (Blast Furnace)
Blending Ratio: 4–10% of total ore feed (adjustable according to furnace capacity and raw material composition)
Core Functions: – Participates in sintering thermal balance: FeS₂ decomposes at 1000–1300°C, releasing heat to supplement sintering energy consumption, reducing fuel usage by 3–5%. – Adjusts slag alkalinity: Optimizes slag fluidity, improves iron recovery rate by 2–4%, and reduces furnace slag discharge. – Partial desulfurization: Cooperates with sintering flux to remove 15–25% of sulfur in raw materials, ensuring molten steel quality.
Application Match: 10–50 mm lump ore is suitable for blast furnaces with volume ≥1000 m³, ensuring uniform feeding and stable reaction.
2. Sintering Auxiliary (Sintering Machine)
Adding Ratio: 2–6% of sintering mixture (according to sintering machine size and raw material sulfur content)
Core Functions: – Improves sinter strength: Promotes the formation of liquid phase during sintering, increases sinter tumbler strength by 5–8%, reducing sinter powder rate. – Adjusts sinter alkalinity: Balances CaO/SiO₂ ratio to 1.8–2.2, meeting blast furnace feeding requirements. – Assists desulfurization: Reacts with sulfur-containing impurities to form stable sulfides, reducing sulfur content in sintered ore by 0.03–0.05%.
Application Match: 0–15 mm mixed grade is suitable for 18–36 m² sintering machines, ensuring uniform mixing with other sintering raw materials.
3. Target Product Application
The sintered ore and molten iron produced by our pyrite blending are widely used in: • Free-Cutting Steel (Y12, 1215): Ensures stable sulfur content (0.08–0.30%) for improved machinability. • Gray Cast Iron (HT200, HT250): Optimizes graphite morphology, enhances casting machinability and mechanical properties. • Ductile Iron (QT450-10, QT500-7): Controls harmful impurities, ensures ductility and toughness of castings.
Why Choose Us?
Experience : 15+ years of focus on metallurgical-grade pyrite R&D and application, cooperating with 30+ large and medium-sized steel mills and foundries worldwide, with on-site technical support teams to solve practical problems in ironmaking and sintering.
Expertise : R&D team consists of senior metallurgical engineers with 20+ years of experience, strictly controlling product indexes according to YB/T 4551-2016 and ISO 9001:2015, tailor-making particle size and impurity control solutions for different furnace types.
Authoritativeness: Certified by SGS, BV, and other international institutions, with complete product testing reports and metallurgical application cases; our technical papers on pyrite sintering application have been published in industry journals.
Trust: Full-process quality control from ore selection to finished product delivery, providing 24/7 technical consultation and after-sales service; free sample testing is available for metallurgical verification.
A: For ironmaking and sintering, medium-low grade pyrite (20–35% S) is cost-optimized for mass production—its sulfur content is sufficient to meet thermal balance and alkalinity adjustment needs, while the cost is 30–40% lower than high-grade pyrite (S≥48%). It avoids excessive sulfur input (which would increase desulfurization pressure) and ensures stable furnace operation, making it the most cost-effective choice for metallurgical enterprises. Additionally, the moderate FeS₂ purity (≥65%) ensures stable reaction without introducing excessive inert impurities.
Q2: How to match the particle size with our furnace type?
A: We provide two standard particle sizes for direct matching: 10–50 mm lump ore is suitable for blast furnaces (BF) with volume ≥1000 m³ (ironmaking blending), ensuring uniform feeding and stable decomposition; 0–15 mm mixed grade is suitable for 18–36 m² sintering machines (sintering auxiliary), ensuring full mixing with other raw materials. If your furnace type is special (e.g., small BF, mini sintering machine), we can customize particle sizes (5–20 mm, 0–10 mm) to match your equipment and process requirements.
Q3: How does pyrite help with sintering thermal balance and desulfurization?
A: During sintering (1000–1300°C), pyrite (FeS₂) decomposes stably to release heat (FeS₂ → FeS + S↑), supplementing the heat required for sintering and reducing fuel (coke breeze) usage by 3–5%—this is the core role in maintaining sintering thermal balance. For desulfurization, the released sulfur reacts with flux (e.g., limestone) in the sintering process to form stable sulfide slag, which is discharged with the slag, achieving partial desulfurization (15–25% desulfurization rate) and reducing sulfur content in sintered ore.
Q4: What are the risks of excessive impurities (P, As, Pb, Zn) in pyrite?
A: These are fatal impurities for metallurgical production: P will cause hot brittleness of steel and reduce casting toughness; As will make steel brittle and affect the mechanical properties of free-cutting steel, gray cast iron, and ductile iron; Pb and Zn will erode the furnace lining, shorten furnace service life, and cause furnace blockage. Our pyrite strictly controls these impurities (P≤0.01%, As≤0.03%, Pb≤0.015%, Zn≤0.015%), which is far lower than the industry limit (P≤0.03%, As≤0.05%), completely avoiding these risks.
Q5: Do you provide metallurgical technical support and sample testing?
A: Yes. We have a professional metallurgical technical team with on-site service experience—we can provide technical guidance on blending ratio, feeding method, and process adjustment according to your ironmaking/sintering process and target products (free-cutting steel, gray cast iron, ductile iron). Free samples (500g–1kg) are available for your laboratory testing and on-site trial, ensuring the product meets your production needs before bulk order. We also provide full-process quality tracking and after-sales technical consultation.
To ensure the quality of the product, it is recommended to store Iron Sulfide Pyrite in a dry and ventilated environment, avoid contact with strong oxidants, and prevent slow oxidation in humid environments that may affect its performance. During handling and use, please handle with care to avoid crystal damage.
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