magnetic separation equipment
PTMS MAGNETIC SEPARATOR
what is magnetic separation method？
The magnetic separation process can minimize the weak magnetic impurity minerals such as hematite, limonite and biotite including continuum particles. Strong magnetic separation usually uses a wet magnetic separator or a high gradient magnetic separator. In general, quartz sand, which is mainly composed of weak magnetic impurities such as limonite, hematite and biotite, can be selected by using a wet magnetic machine at 10,000 Oersted or higher; For the main ferromagnetic minerals, the weak magnetic machine pair or the medium magnetic machine is better. The experimental conditions of the Seto quartz sand were studied by using a strong magnetic machine. The results show that the magnetic number and The magnetic field strength has an important effect on the removal of iron. As the number of magnetic separations increases, the iron content decreases gradually, and a certain magnetic field strength can remove most of the iron. However, even if the magnetic field strength is increased a lot, the iron removal rate is not How much change. In addition, the finer the grain size of the quartz sand, the better the iron removal effect, because the fine-grained quartz sand contains a high amount of iron-containing impurities. When the quartz sand raw sand contains more impurity minerals, the scrubbing, deliming and magnetic separation can not be used to purify the quartz sand into high-purity sand, in order to further improve the purity of the quartz sand and reduce impurities.
The quartz sand beneficiation purification method and process are generally determined by the following points: a; the occurrence state of impurity minerals in the raw sand; b the ore dressing cost of the purification process; c the industrial use of the fine sand product.
For fine sand quartz sand for general industrial use, choose a simple process to reduce the purification cost. It is recommended to use the scrubbing-de-sludge-magnetic separation process to meet the spiritual quality requirements.
For high-purity and ultra-high-purity quartz sands as high-tech sands, it is necessary to further purify the quartz sand by flotation and acid leaching. The quality requirements of high-purity and ultra-high-purity quartz sand are generally ≥99.99% for silica and less than 1×10-5 for ferric oxide. The purification process must not only strictly control the selection conditions, but also the requirements for the corresponding purification equipment. It is also stricter to prevent secondary pollution.
For the first time, we used the new high-efficiency scrubbing-grading-magnetic separation process, and succeeded in the beneficiation and purification of quartz sandstone in a certain area in Yunnan, overcoming the secondary pollution of iron caused by rod scrubbing. Low disadvantages. This process is of great significance for realizing the low-cost, high-efficiency purification and impurity removal of quartz sand.
