iron process technology

guide iron processing technology

iron process technology

As one of the earliest, most widely used metals in the world, iron ore is an important raw material for iron and steel production. At present, iron ore resources are decreasing day by day, which is characterized by more lean ore than rich ore, more associated ore and complex ore composition. Xinhai Mining, as a mineral processing equipment manufacturer with over-20-year experience, provides responsible iron ore processing technologies by different type of iron ores.

Magnetite Iron Ore Processing

Because of the strong magnetism of magnetite, the extraction of iron from magnetite is weak magnetic separation technology. The magnetite iron ore processing maninly includes:

iron process technology

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Hematite Iron Ore Processing

Hematite is weak magnetic ore, which can be easier separation by flotation than magnetite. In the old days, hematite was separated by gravity separation, however it was weed out for unreachable capacity. Now Hematite iron ore processing is as follows:

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Limonite Iron Ore Processing

Limonite is one of the main type of iron ores, but its iron content is lower than magnetite and hematite, and it is a secondary iron ore. At present, the industrial application of limonite iron ore processing includes:

Single Concentration Process

The single separation process of lignite is mainly used for the lignite with high iron content and good selectivity, which can be divided into a single magnetic separation process and a single gravity separation process. The single gravity separation process is used to deal with the extraction of iron ore with coarser grain size, and the equipment is selected according to the grain size of the ore. Single magnetic separation process generally refers to a single strong magnetic separation process, this process has a strong adaptability to the ore, the concentrate is easy to concentrate and filter, but it is not suitable for fine grade slime.

Combined Iron Ore Processing

The combined iron ore processing technology only used for limonite, includes magnetization - magnetic separation process, flotation - strong magnetic separation process, gravity separation - strong magnetic separation process, etc., which are used for the extraction of iron from limonite with relatively complex composition. The specific iron ore processing technology shall be determined after the mineral processing test has proved the ore properties.

iron process technology

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Siderite Iron Ore Processing

Like limonite, siderite is a low-grade iron ore that is unstable. The iron ore processing technology used in siderite concentrator are gravity separation and strong magnetic separation. Different siderite has different iron ore processing methods. The extraction of iron from single siderite with coarse grain size is suitable to be treated with single gravity separation, single strong magnetic separation and combined process including two kinds of iron ore processing technologies. For the extraction of iron from siderite with fine grain size, effective extraction of iron include roasting magnetic separation, strong magnetic separation, flotation or magnetic flotation combined process.

Siderite containing magnetite can be separated by a combined iron ore processing method of weak magnetic separation and gravity separation, strong magnetic separation, or flotation in series, or a more complex iron ore processing method.

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What Is Treatment of Iron Ore Tailings?

iron process technology

Iron ore processing capacity is huge, iron ore tailings account for about half of the total metal tailings, in recent years due to the increasing awareness of environmental protection and tailings accidents, whether from the perspective of comprehensive utilization of resources or from the perspective of environmental protection and safety, iron ore tailings treatment is a problem that needs attention.

To avoid resource waste and tailings accidents at the source, the main treatment methods of iron ore tailings at present are: tailings reprocessing, tailings dry stacking and full tailings consolidation and filling method.

Tailings Reprocessing: Effectively increasing product rate and recovery rate, comprehensive utilization of iron ore resources.

Tailings Dry Stacking: Reducing the cost of tailings pond and the risk of accidents and pollution.

Tailings Consolidation and Filling Method: Utilization of tailings, protecting terrain and environment.

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Xinhai Solutions

Anhui 600t/d Iron Magnetic Separation Project

Anhui 600t/d Iron Magnetic Separation Project

Processing Flow:

Stage grinding(2 stages) + stage separation(6 stages magnetic separation) + iron concentrate dewatering + tailings magnetic and gravity separation + grinding + flotation separation of sulfur and titanium.

Equipment:

Inner Mongolia 2500t/d Iron Ore Processing Plant

Inner Mongolia 2500t/d Iron Ore Processing Plant

Processing Flow:

One stage grinding + two-block classification + close-circuit grinding + four-block magnetic separation + concentrate dewatering + tailings dewatering

Equipment:

Yunnan 100t/d Iron Ore Processing Plant

Yunnan 100t/d Iron Ore Processing Plant

Processing flow:

Strong magnetic separation: two-and-half-block close circuit crushing and screening + strong magnetic separation

Verse flotation: two-and-half-block close circuit crushing and screening + verse flotation

Weak magnetic separation: two-and-half-block close circuit crushing and screening + one stage pre-magnetic separation for tail tossing + one stage close circuit grinding + two-block weak magnetic separation

Equipment:

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