Hematite processing solutions

Hematite Beneficiation Solution: Improve Iron and Reduce Impurities, Enable High-end Smelting

I. Solution Overview: Precise Separation, Maximize Value

As one of the most important iron ore resources, the core of hematite (Fe₂O₃) beneficiation technology lies in the effective separation of hematite from quartz, alumino-silicates and other pulsed minerals, in order to enhance the iron grade and reduce the content of harmful impurities. We provide a full range of hematite beneficiation solutions, including positive flotation, reverse flotation, combined process and other mature routes. Through in-depth study of ore properties and customized design of pharmaceutical system, we are committed to steadily increase the iron ore concentrate grade to over 65%, up to 70%, while ensuring excellent recovery to meet the stringent requirements of modern blast furnace smelting on the quality of raw materials.

Core process: scientific proportioning according to the "mine".

1. Positive flotation process

• Applicable ore: single hematite with relatively simple mineral composition and mainly silicate veinstone.

• Core principle: Under alkaline conditions (pH=9-11), selective capture of hematite with fatty acid trap (such as oxidized paraffin soap), so that it is floated.

• Typical process: grinding (-0.074mm accounts for 80%) → slurry adjustment (Na₂CO₃ adjust pH) → positive flotation (one coarse and multiple concentrate) → concentrate dehydration.

• Advantage: simple process, relatively low investment and chemical cost.

• Indicator: concentrate grade is usually up to 62%-65%.

2. reverse flotation process (mainstream high-efficiency technology)

• Applicable ores: Wide range of application, especially suitable for processing ores with more complex composition, and is the first choice for obtaining high-grade concentrate.

• Core principle: inhibit hematite with starch and other inhibitors, flotation of quartz and other vein minerals with traps.

  • Anionic reverse flotation: activation of quartz with CaO, flotation of quartz with fatty acid-based trap. It needs to be carried out under high alkali (pH>11) environment.

  • Cationic reverse flotation: direct flotation of quartz with amine traps (e.g. dodecylamine). Carried out under weak alkaline (pH=8-9) environment, simple process, more widely used.

• Advantage: High concentrate grade and good desiliconization effect.

• Indicator: Concentrate grade can reach 65%-68% stably.

3. Combined sorting process

• Positive-reverse flotation combination:

  • Flow: firstly, adopt positive flotation for rapid roughing and enrichment, and then carry out reverse flotation for deep desiliconization of rough concentrate.

  • Advantage: balance between recovery and concentrate grade.

  • Indicator: Concentrate grade can be more than 67%.

• Combined magnetic separation-flotation:

  • Flow: first use strong magnetic separation (high gradient magnetic separator) to pre-enrichment, throw off a large number of tailings, and then carry out reverse flotation to improve the quality of the magnetic separation concentrate.

  • Application: Especially suitable for difficult to select hematite with micro-fine grains embedded or containing easily slaked veins.

  • Advantage: greatly reduce the amount of flotation, save energy and drug consumption, low comprehensive cost.

  • Index: concentrate grade can reach 68%-70%, recovery rate of 75% or more.

III. Recommended configuration of core equipment

Solution core advantages

• High-quality products: through the reverse flotation and combined process, it can stably produce high-quality iron ore concentrate with TFe≥65%, with significantly reduced impurity SiO₂ content and strong product competitiveness.

• Mature and reliable technology: all processes have a large number of successful applications worldwide, with low technical risks and stable indicators.

• Remarkable economic benefits:

  • The combined process can significantly reduce the scale of subsequent flotation operations and drug consumption, thus reducing operating costs.

  • The high recovery rate ensures the maximization of resource value extraction.

• Green environmental protection:

  • Process water recycling rate ≥90%, realizing water saving.

  • Provide environmental protection programs such as tailings dry stacking, thickening transportation and filling to reduce the environmental footprint.

V. Our Service Commitment

We provide technical support for the whole process from "ore sample" to "concentrate":

1. Ore Characterization: We provide free ore sample testing, detailed process mineralogical analysis and systematic selectivity tests to determine the optimal process and chemical regime.

2. Scheme Design and Optimization: Based on the test results, carry out process design, equipment selection calculation, economic evaluation and plant layout planning.

3. Equipment Supply and Integration: Provide all core hosts, auxiliary equipment and intelligent control systems to ensure system compatibility and reliability.

4. Construction and operation support: engineer team on-site to guide the installation, commissioning, put into production, and train qualified technical team for customers.

5. Continuous optimization and after-sales service: Provide long-term production optimization suggestions, technical consultation and spare parts supply service.

How to start your project?
The answer starts with a detailed ore report.
Send us your hematite ore sample and our beneficiation laboratory will:

1. Analyze the chemical composition, mineralogical composition and embedding characteristics of the ore.

2. Conduct comparative tests of positive flotation and negative flotation, and recommend a solution for hematite beneficiation with the best technical and economic indicators.

3. Provide preliminary hematite beneficiationprocess flow, equipment list and investment benefit analysis.

Contact us now and let us enhance the value of every ton of hematite for you with our professional technology!