Ore properties and mineral structure
Garnet is a group of pomegranate minerals with the same physical properties and crystalline habits. It belongs to aluminum (calcium) silicate minerals, and two categories of alumina and calcium oxide in mineral administration.The chemical composition of garnet change is large, and the general chemical formula is A3B2 (SiO4) 3, wherein A represents divalent calcium, magnesium, iron, manganese and other cations, b represents a cation such as trivalent aluminum, iron, chromium, manganese.The same name of the garnet is different due to the different origins, and its chemical components are different.
The garnet is generally different from crystalline particles, with a moderate hardness, high melting point, good toughness, and chemical stability.
Application field and technical indicators
The garnet hardness is moderate, the toughness is good, the grinding force is large, the particle size is uniform. It is excellent natural abrasive material in the optical, electronics, machinery, printing, building, instrumentation, metallurgical geology.Application, in addition, garnet has also been applied in high-tech fields such as jewelry, petrochemical, laser and computers.
Different uses have different quality requirements for garnet, and the quality requirements of several major use of garnet are as follows.
(1) Grinding material
Advanced abrasives generally use iron-aluminum garnet production, requiring hardness of not less than 7.5, and the garnet content is greater than 93%, which can produce sharp angle in a certain pressure, and will not break into powder and lose grinding efficiency.The blasting abrasive requires 75 to 80% of the garnet content.
(2) Filter media
General requirements are iron-aluminum garnet, purity of 98% or more, particle size range 0.25 ~ 5mm, the structure of garnet, the particles do not disintegrate, dissolved in the acid, is less than 2%, and the granular shape requires circular and angular angles.
(3) Gem Materials
Require garnet color, clean and transparent, crystalline particle size, generally red, purple, green, and rose.
The deep purple transparency is higher and the hardness is more than 7 or more
(4) Bearings of clock and precision instruments
Require the purity of garnet, good crystallization, high hardness, good heat resistance.
Processing Technology
In order to meet the requirements of garnet purity, particle size and distribution in the application, it is necessary to perform processing of mineral purification, fine mill, ultrafine mill, and fine classification.
Applications, flotation, magnetic selection, and chemical mineralization methods have been applied in the mineralization purification of garnet.
Reselection is mainly used to remove longtezed, mica, flash, bridal, quartz equivalent mineral, and the reselection equipment adopted is mainly shaker, jig, chute, and re-prime mining machine.Flotation is mainly to add pharmaceutical separation of quartz, sericite, white tungsite, siliconline, etc
Magnetic selection is mainly used to remove magnetic minerals, such as magnetite, titanium iron ore, iron oxide and small amounts of long-stone, quartz, siliconline, etc., the main cylinder magnetic distribution machine, plate magnetic separation Machine, ring high gradient magnetic separator, etc.
The chemical mineralization is mainly acid-treated, and it is animate to further remove iron-containing minerals with soaking in the porrontal concentrate.The choice of specific mineralization methods and process flows is based on ore types, garnet, pulsestone and accompanying minerals.Most of industrial production uses a joint distribution process.
In order to produce high-purity fine grain and ultra-fine grain abrasives, the garnet concentrate also performs fine mill, ultrafine mill and chemical treatment.
Fine mill and ultrafine mill use vibration grinding, ball mill and agitating wear.Chemical leaching uses industrial hydrochloric acid leaching, acid immersion and water washing, the galline concentrate powder is gravity settling and the water, and the grading is graded according to the size of the particle size, and finally 45 to 0.5 mm (number) abrasive.
Post time: Apr-19-2021