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Click to add WeChatHematite is one of the main sources of iron ore resources and can be used as pigments, gemstone materials, ballast for ships, and even radiation shielding for medical and scientific research equipment. It can be seen that hematite has a wide range of applications in people's lives. However, in the past iron ore mining process, hematite was often treated as tailings, resulting in hematite resources not being fully utilized. Therefore, in order to fully develop and utilize hematite resources, it is imperative to understand the hematite beneficiation process. So, how to efficiently recycle hematite?
Generally, the conventional hematite beneficiation process is: Crushing and screening, grinding and classification, sorting, concentration and dehydration (filtration) and other parts.
The hematite crushing and screening operation can be divided into two parts: crushing and screening.
Crushing operation:The raw ore obtained from the ore source is stored in the raw ore silo and sent to the crusher through the trough feeder for crushing operation. When the material is crushed to a size suitable for the oreball mill, the next step of the process can be carried out.
Screening operation: Mainly involves screening the crushed minerals, and those that meet the standards will enter the next stage, while those that do not meet the grinding requirements need to enter the crushing system again. The process is as follows: the crushed minerals need to enter the screening machine for screening, the materials above the screen are returned to the crusher by the conveyor, and the materials below the screen are sent to the abrasive bin by the belt conveyor to prepare for the next operation section.
The equipment required for hematite crushing and screening
The above is hematite Crushing and screening operations in the mineral processing process. It can be seen from the content that when processing hematite raw ore, the equipment required is a crusher, screener, feeder and conveyor. Customers can choose appropriate hematite crushing, screening and other equipment based on their own production capacity and hematite source conditions.
In order to separate the hematite concentrate and associated minerals as much as possible, we need to carry out grinding and classification. Conventional hematite grinding and classification operations usually use two-stage grinding operations. The specific process is as follows:
Primary grinding and classification: The crushed products are stored in the abrasive bin and fed into the wet ball mill by the feeder and belt conveyor for grinding operation. According to the grinding principle, after the minerals reach the particle size requirements, they are discharged from the body to complete one grinding. The ground products are directly sent to the cyclone for classification. Qualified materials are sent to the second stage grinding operation, and unqualified materials are returned to the grid ball mill again. Grinding ore.
Secondary grinding and classification: In order to obtain finer-grained minerals, roughing and concentrate control grading operations are required. The qualified products from the first-stage grinding and classification are sent to the second-stage ball mill to continue grinding. The overflow part is used for the next step of mineral processing, and the low flow enters the ball mill Grind again.
Hematite grinding and grading equipment
The above are the stages of hematite Grinding and grading process. The equipment required at this stage is mainly wet ball mill, hydrocyclone (group) and material conveying equipment slurry pump. Welcome to consult Xinhai Mining to purchase equipment.
Hematite beneficiation operation is generally a combined magnetic separation + flotation beneficiation process, in which magnetite adopts a strong magnetic separation process. Flotation adopts reverse flotation process.
Hematite strong magnetic separation process:The magnetic separation part starts after a period of grinding operation. After grinding and classification, magnetic separation is first performed to remove some impurity minerals to obtain The coarse concentrate of hematite is then sent to the second stage grinding operation by a slurry pump, which continues to improve the grinding requirements and achieve mineral separation as much as possible. The magnetic separation tailings are directly entered into the tailings.
Hematite reverse flotation process: In order to obtain high-grade hematite concentrate, roughing, sweeping and beneficiation are generally used to complete the hematite beneficiation operation. The process is as follows: the second-stage grinding product is sent into the stirring tank, and appropriate chemicals and dosages are added for stirring, so that the chemicals and minerals are fully mixed and then sent to the flotation machine for three times of flotation to obtain high-grade red minerals. The iron ore concentrate and tailings after flotation are sent to the tailings storage for storage after the tailings are dry discharged.
Equipment required for hematite separation operation
The above is hematite separation Different stages of the process. The equipment required for this stage includes: strong magnetic separator, flotation machine, stirring tank and slurry pump. Welcome to consult Xinhai Mining to purchase equipment.
The hematite concentrate after reverse flotation contains a large amount of water. In order to obtain the finished hematite concentrate, it needs to be Concentrate and dehydrate, the specific process is as follows:
Concentration operation:The slurry after reverse flotation is sent to the thickener through the slurry pump, and the hematite particles in the slurry will be The slurry settles at the bottom of the concentrator tank due to gravity. When the slurry settles, it will be collected by the rake on the bottom of the tank to the center of the bottom of the concentrator, and then flow out of the body for the next step of dehydration and filtration.
Filtering operation: The concentrate overflowed from the concentrator needs to be further dehydrated and sent to the filter for filtration. The hematite concentrate is in the negative pressure area formed by the vacuum pump. It is adsorbed on the disc filter cloth under the action of pressure. After a period of time, a filter cake with a certain thickness will be formed on the disc filter cloth. Under the pressure of the blower and the action of the filter scraper, the filter cake falls into the filter cake tank. Inside, is the hematite concentrate, and the rest of the filtrate is discharged from the central shaft.
Equipment required for hematite concentration and dehydration
The above is the concentration and dehydration of hematite Process, the mineral processing equipment required in this process includes concentrators, disc filters, slurry pumps and belt conveyors, etc. The specific model and size of the concentrator and filter can be customized according to the actual renewal of hematite.
The above is an introduction to the process and application of hematite beneficiation process. In the beneficiation process, the process and equipment The selection and matching of the two are particularly important. Problems with either of them will directly affect the grade of the final hematite concentrate and the recovery rate of the mineral processing. Therefore, choosing the correct hematite beneficiation process and equipment is key. Xinhai Mining Equipment has more than 20 years of experience in mineral processing plant design and mineral processing equipment production, and has participated in multiple hematite beneficiation projects at home and abroad. We are confident that we can design a complete and suitable hematite beneficiation production line and a set of beneficiation equipment for you. If you have any needs, please feel free to consult Xinhai Mining Equipment.
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