JCTN Raising Concentrate Grade and Decreasing Dregs Content Drum

Permanent Magnetic Separator

J C T N Raising Concentrate Grade and Decreasing   Dregs Content Drum PermanentMagnetic Separator developed by our company. It adopts a large wrap angle of 240°~270°, multi-pole and magnetic pulsation structure combined with multi-channel rinsing water, top flushing device and a new tank form , can increase the concentrate grade by 2~10% compared with conventional magnetic separators without reducing the recovery rate, thereby solving the problem that conventional magnetic separators are difficult to improve concentrate grades caused by magnetic agglomeration of impurities.

The product has applied for domestic invention patents and international invention patents, and passed the provincial and ministerial product appraisal on May 30, 2015, which is the first at home and abroad and the international leading level.

Application:

This product is a wet magnetic separator designed for rinsing and purification of magnetic ore. According to the process requirements, the magnetic ore is washed, selected and purified, deslimed and concentrated. Applicable to: sorting and desliming of graded overflow products after primary grinding; mineral concentration before secondary grinding and filtration; desliming of magnetite before entering fine sieve screening and desliming before reverse flotation; It is the ultimate selection of magnetite.

JCTN working principle

After the ore slurry is fed into the tube feeding device 1, it is directly fed into the equipment sorting area through the gap-type cloth. The magnetic minerals in it are firstly magnetized and chained and layered, and then directly adsorbed on the surface of the drum 3 by the high-efficiency magnetic force, and the magnetic concentrate is taken out of the liquid surface by the counter-rotating drum 3, and the magnetic concentrate is transported upwards. The separation of water and ore can be realized in the process of conveying, and the concentration can be increased. At the same time, after the concentrate is separated from the liquid surface, it is affected by the built-in stirring magnetic field on the surface of the drum 3 to realize the mechanical movement of repeated agglomeration, dispersion, and agglomeration of ore particles. , and under the rinsing of multi-stage rinsing water 2, impurities such as silicon, sulfur, phosphorus and poor aggregate in the concentrate can be effectively shaved off, so that the grade of the concentrate can be improved as much as possible. Finally, the double-layer scraper (Discharge device 4 and scraper 5), it is enriched into the concentrate box 6 to become concentrate; and the non-magnetic minerals and lean associated organisms, together with the ore flow, enter the tailings outlet 7 at the bottom of the sorting tank to become tailings or middlings .

Patent innovation points

1.Multi-stage rinse water device

The tank body is equipped with multi-channel rinsing devices, which use specially arranged stainless steel nozzles to fully rinse the minerals on the surface of the drum, so that impurities such as silicon, sulfur, phosphorus and poor aggregate in the concentrate can be effectively shaved,to improve the concentrate grade as much as possible.

◆ Top curtain rinse structure

The top of the tank is equipped with a water curtain rinsing structure, which can effectively bring silicon, sulfur, phosphorus and other impurities in the magnetic agglomeration opened under the action of the multi-stage rinsing water device and the magnetic agitation device and poor aggregate to the tailings, and can reduce impurities into the concentrate.

◆ Large wrap angle multi-pole magnetic system structure

The magnetic system structure with 240° ~ 270° large wrap angle and multiple magnetic poles can make the minerals roll on the surface of the drum multiple times, and effectively remove the silicon, sulfur, phosphorus, etc. mixed in the minerals, thereby improving the grade of the concentrate .

◆ Magnetic pulsation magnetic circuit technology

There is a magnetic stirring device inside the drum skin, so that the minerals attached to the surface of the drum can be effectively magnetically stirred, combined with the multi-pole magnetic system to generate a pulsating magnetic field, so that the minerals are repeatedly agglomerated and dispersed, and rinsed with rinsing water,

It can effectively remove harmful substances such as silicon, sulfur, phosphorus, and poor aggregate in the concentrate, thereby improving the grade of the concentrate.

◆ Bearing protection

The outer side of the aluminum end cover adopts a wide groove and a structural design with a hidden chamber inside, which prevents the slurry from production from penetrating the joint surface of the shaft end piece and strengthens the sealing of the equipment. The roller shaft end adopts a composite sealing method of multi-groove labyrinth mechanical seal and lip seal ring, which prevents impurities from entering the shaft end and damaging the bearing. And there is a shaft sleeve at the non-drive end, which can effectively prevent damage to the shaft when the bearing is damaged.

◆ Anhydrous ore unloading device

Adopting the double scraper to discharge the mineral in order to enrich the concentrate and improve the density of the concentrate.The scraper is made of wear-resistant material ,which can prolong the service life.

◆ Dual filter flushing system

The washing system controls 8 resining pipes by the control valve.The main pipe has the pipe filter and a double Y-shaped pipe filter, which can keep the nozzle from bloch for longtime operation . 

◆ feeding device

Feeding device is tube feeding box, connected by flange, which is connected by 2-4 flanges, through the gap-type distribution material and the overflow device. to achieve the purpose of evenly distributing the materials. The 30mm thickness steel pipe at the bottom ensures long-term use without being worn out.

◆ Transmission

The J C T N magnetic separator is equipped with a frequency conversion speed regulation control device, which can adjust the speed of the equipment according to the properties of the on-site ore, so as to achieve the corresponding mineral processing index.

◆ High concentrate box

The concentrate box adopts a heightened structure, which can effectively prevent the slurry from splashing out, and a wear-resistant ceramic sheet is pasted on the place that is easy to wear to increase the service life of the concentrate box.

Main technical parameters

Note: 1. Please provide ore samples for equipment selection, so as to determine the best separation parameters through magnetic separation experiments.

Six new revolutions in beneficiation process innovation

JCTN Magnetic Separator is a magnetic system structure with large wrap angle and multiple magnetic poles. Combined with magnetic stirring device, rinsing water device, and transmission device equipped with frequency conversion speed regulation, the controllability of JCTN Magnetic Separator is enhanced, according to the specific ore properties, adjust the operating parameters of the equipment to meet the requirements of different process positions for mineral processing indicators. In the beneficiation process, it can realize:

1）、 Get the qualified concentrate in advance after the first stage of grinding, so as to realize "Get it early";

2）、 Increase the scrap rate before grinding, and realize "Throw it early ";

3）、The all-magnetic process replaces the reverse flotation process to achieve "Get more";

4）、A single JCTN magnetic separator replaces multiple traditional magnetic separators;

5）、Replace traditional selection equipment;

6)、Application in ultra-fine iron ore.

Use case of JCTN magnetic separator

Application of JCTN Magnetic Separator in Benxi Dongfangsanjiazi Mining Industry

The first stage of JCTN1245 magnetic separator is fed by the overflow of the first stage of cyclone, and the grinding fineness is -200 mesh, accounting for 80%. The field use data of one stage of JCTN1245 magnetic separator is shown in Table 1. 

 Table 1 Field data of a JCTN1245 magnetic separator

It can be seen from the above table that the first stage adopts JCTN1245 magnetic separator, and the fineness is -200 mesh, accounting for 80%， the raw ore grade was increased from 27.50% to concentrate grade of 48.45%, tailings magnetic iron was 0.30%, and tailings magnetic iron was less than 1.00% in response to customer requirements.

A total of 10 sets of JCTN1245 magnetic separators are used for sorting operations in the first stage of the site. The separation of this equipment not only improves the grade of the concentrate, but also throws out most of the tailings, reduces the amount of grinding in the second stage, and saves energy consumption,the on-site use is good and has won praise from customers.

The feed material of the second-stage JCTN1245 magnetic separator is the overflow of the second-stage cyclone, and the grinding fineness is -400 mesh, accounting for 90%. The field use data of the second-stage JCTN1245 magnetic separator is shown in Table 2.

Table 2 Field data of second -stage JCTN1245 magnetic separator

It can be seen from the above table that the second stage adopts JCTN1245 magnetic separator, and the fineness is -400 mesh, accounting for 90%, the raw ore grade was increased from 52.65% to concentrate grade of 63.83%, tailings magnetic iron was 0.60%. and tailings magnetic iron was less than 1.00% in response to customer requirements.

A total of 10 JCTN1245 magnetic separators are used in the second stage of the site for separation operations. Through the separation of this equipment, the grade of concentrate ore required by the customer is between 61.00% and 65.00%, and the magnetic iron of tailings is less than 1.00%. Comparing the use of separators in series, one refiner and slag-removing magnetic separator can replace two ordinary magnetic separators, reducing the floor space and operating costs.