Gold Mining Spiral Classifier of Mineral Processing Plant

The classifier which form closed-circuit work with grinding mill in the factory need the machine which can lift grit, so this kind of classifier called mechanical classifier, actually the classifying process conduct still depending on the different sedimentation rate of the particle. Mechanical classifier sometimes wash the ore which contain the clay or desliming and dewatering for the ore except pre-classification and classification check as the auxiliary equipment of grinding. According to different lifting way for the grit, mechanical classifier can divided into spiral classifier, rake classifier and bowl classifier etc. The spiral classifier is simple structure, easy operation, big inclination of classify tank, so that it can be connected with the grinding mill by gravity flow easily, that is why it is widespread in application. Other kinds of classifiers in our country are still in use, but has stopped manufacturing.
The shape of spiral classifier is a rectangular tank, the tank inclination is 12°to 18.5°, and the bottom of tank seems a semicircle. In the tank equipped with 1 or 2 long axis, and along the axis, continuously installed with spiral blade. The drive mechanism drives the spiral axis start rotation. Slurry is fed from the side of tank, it become settlement classified layer at the bottom. Coarse particles sink to the bottom and then spiral blade transport it to the discharge at the top, at same time it will be dewatered during this transportation, unsettled fine particles carried by slurry flow and discharges from the overflow weir. Classifying process is basically same with the desliming cone, on the classifier tank there is a lifting mechanism which can adjust the distance of blade and bottom , and the axis can be lifted up when close down to avoid that settled sand bury the blade.
According to liquid level the spiral classifier can be divided into high weir type and submersion (or sinking ) type, The overflow weir of high weir classifier is higher than the center of the spiral axis at lower end, but lower than the upper edge of the spiral blade. The length of liquid level is short, so its surface can directly gets the stirring effect by the spiral blade, therefore it suitable for coarse particle classification, usually the classified particle size is over 0.15mm. The spiral blade of submersion classifier at lower end completely submerged under the liquid level, the classifying area is big and smooth, suitable for fine particle classification, which is less 0.15mm, and with higher overflow productivity. In addition, there is a low weir spiral classifier, its liquid level lower than the spiral bearing at the lower end, the liquid level is very small, but the stirring effect is strong, mainly used for washing gravel ore containing mud.
The inclination with horizon of FLG300 500,700,1000 classifier are 14 ° - 18 ° 25 ", FLG1200, 2FLG1200, FLG1500, 2FLG1500, FLG1200 2FLG1200 are 12 ° - 16 °. The motor drives the spiral axis to rotating through the reducer, the slurry from ball mill enter into the spiral classifier from one side at front-end, at the front-end of spiral classifier forms a deep slurry pool, inside the spiral blade keep rotating let the slurry gets enough agitating, that causes the fine particles flow on the top of water, and cross the overflow weir and go into the discharge chute, but the coarse particles sink to the bottom of tank, and lifted up by rotary spiral blade go to the end of spiral classifier, from discharge chute return to the ball mill for re-grinding.

The spiral classifier is a device that uses the principle of different settling speeds of solid particles in liquids for classification. Spiral classifiers are widely used in mining, metallurgy, building materials and other industries.

• Through the rotation of the spiral, a mixture of solid particles of different sizes and specific gravity is fed into the machine;
• Depending on the size and specific gravity of the particles, their settling speed in the liquid is also different;
• Larger or heavier particles will settle faster, while smaller or lighter particles will settle slower.
• Finally, through the separation and classification function of the spiral classifier, solid particles of different sizes and specific gravity can be separated to achieve the purpose of classification.

• Spiral classifier has the advantages of low energy consumption, high output and high precision.
• Compared with other grading equipment, the energy consumption is reduced by 50%, the output is increased by 50%, and the large particles and screen residues in the product can be completely eliminated.
• The equipment is simple to operate, high degree of automation, strong stability, the use of negative pressure production, no dust pollution, good environment.
• The equipment is suitable for the separation of superstandard stone powder in the dry production process of machine-made sand, which can easily control the content of stone powder and meet the requirements of users.
• The equipment can adjust the content of 0.00-0.75mm stone powder between 2% and 15%, the quality of stone powder is easy to control, the fineness adjustment is convenient, flexible and reliable.

Hongji Mining Machinery Co, Ltd. is a large production-oriented enterprise with import and export qualifications, mainly providing "whole mining beneficiation equipment system and service, and is a large-scale joint stock enterorise intecrating RaD, manufacturing, sales. and EPC proiect The company is headguartered at No. 166 North Taojia Road, Xingyang City, Zhengzhou City, Henan Province , with a total area of more than 80000 square meterAfter more than 20 years of development, now t has three producton bases, more than 180 sets of varous arge and medium-sized processing machining ivetina. weldina. and assemblv equipment. more than 200emplovees. with 105 senior and intermediate itles' professional encineers.

1. How is the quality of your products?

Our products are manufactured strictly according to national and international standard, and we take a test on every grinder before delivery.

2. Guaranteed:

If products 'quality is not consistent with the description as we described or the promise before you place order, we promise 100% refund.

3. How about price?

Yes, we are factory and are able to give you the lowest price than market one and we have a policy that "for saving time and absolutely honest business attitude, we quote as low as possible for any customer, and discount can be given according to quantity.

4. Service and Payment Terms?

A. We usually accept T/T, L/C, but other terms also workable.
B. We take pictures of finished products before delivery.

5. Will you help with installation and staff training?

Yes, we can send our engineers to your place to guide the installation and train your workers if needed, but the buyer should bear our technician's round tickets, accommodation, and food.