Application of Spodumene and Grinding Equipment

Date:2023-06-20 10:38:12 From: Click:

About Spodumene

Spodumene can also call triphane. Spodumene is a lithium-containing aluminosilicate mineral belonging to the pyroxene group. It is usually columnar, granular or plate shaped, and the color is mostly gray, gray green, purple or yellow. The hardness is 6.5-7 and the density is 3.03-3.22g/cm³. Spodumene is mainly produced in granite pegmatite, including the United States, Brazil, Madagascar, Pakistan and China's Xinjiang and other places.

Chemical Property

The common spodumene is tabular, columnar or irregular, and the longitudinal grain of the cylinder is developed. The chemical composition is mainly Li2O, Al2O3 and SiO2, and there are Na, Mg, K, Ca, Fe, Cr, Mn, Zn and other trace ions. Different trace ions make spodumene have different colors, such as emerald green spodumene is caused by Cr and Fe, and Mn makes spodumene purple.

Development and Application of Spodumene

Spodumene is one of the main minerals of lithium ore, and the current hot new energy utilization project with good development prospects - lithium in lithium batteries also comes from this.Spodumene widely used in lithium chemical industry, glass, ceramics and other industries. Spodumene can also be used as a gem material, of which the beautiful color, crystal transparent spodumene (such as green spodumene, purple spodumene) is often used in jewelry production.

application of spodumene

Application in Ceramic Embryo

Adding spodumene to the ceramic embryo is not only a flux, but also an important component to ensure the formation of low thermal expansion crystals. The porcelain blank made of spodumene mixed with potassium feldspar (or albite) has a lower water absorption rate than the blank made of feldspar only, the firing temperature can be reduced and the strength can be increased. Compared with glass-ceramics, it has the characteristics of low sintering temperature, simple process, low cost and easy popularization. In addition, by using the characteristics of low expansion coefficient, good thermal vibration, good electrical insulation and chemical stability, it also has a wide application prospect in the manufacture of non-ferrous metal filters and thermal converters.
For the manufacturing of feldspar raw materials for electrical ceramics, the ratio of alkali metal oxides has strict requirements, because they have a very important impact on the dielectric properties of electrical ceramics. The production of electric porcelain is most interested in lithium containing raw materials - spodumene concentrate. Using spodumene to completely replace feldspar in the production of insulators can greatly improve the mechanical strength and insulation strength, reduce the coefficient of thermal expansion, improve the thermal stability, and also reduce the firing temperature.

Application in ceramic casserole

On the basis of the traditional casserole process, the spodumene is added to the material according to a certain proportion, and the stability and heat resistance of spodumene are used to make up for the shortcomings of the traditional casserole dry burning. This kind of casserole is burned to 600℃ and put into 20℃ water without cracking. Spodumene heat resistant casserole can be directly barbecued in the microwave oven, can also be refrigerated in the refrigerator, fried, fried, stews, cook food under a variety of heat sources, withstand the test of long-term cold and hot conditions are still intact, with good heat stability, while spodumene is a weak alkaline crystal ore, rich in a variety of minerals can be decomposed by heating weak alkaline minerals. Using a ceramic casserole with spodumene to cook food can supplement the trace elements needed by the body, and has a certain health effect.

Application in accessories

Because spodumene has many colors, it can be made of bracelets, necklaces, clothing accessories and other ornaments.

Application in other fields

Spodumene is used in the glass and enamel industry to improve mechanical strength and thermal shock resistance.
Lithium hydroxide was first used as an ingredient in alkaline batteries. Its incorporation can increase battery life. The action of lithium hydroxide with fatty acids produces a new type of lubricating grease that maintains its viscosity over a wide temperature range and maintains its stability in the presence of water.
Chlorinated and bromide solutions of lithium have low vapor pressure and are therefore used in absorption refrigeration systems.
Lithium oxide in addition to ceramics, glass as a flux is also used in welding, welding agent in riveting.
Lithium organic compound butyl lithium, which is used as a catalyst for the polymerization of butadiene and styrene to produce polymers with special properties.
Lithium chemicals are also used in environmental health for purification, bleaching and vitamin synthesis.

Spodumene Powder Process

Lithium extraction from spodumene mainly uses sulfuric acid method, which generally goes through the process of spodumene roasting transformation, spodumene clinker fine grinding, powder acid mixing, clinker acidification roasting, clinker leaching and washing, slurry solid-liquid separation, purification liquid evaporation and concentration, lithium precipitation and other processes.
As the front-end process of lithium extraction from spodumene, the appropriate grinding fineness is important to the subsequent flotation effect, and the particle size of lithium ore generally needs to be ground to 200 mesh to obtain better flotation effect, and can better ensure the uniformity of the downstream production process mix. Therefore, it is very important to choose the right grinding mill.
We recommend you choose a Vertical roller grinding mill.

vertical roller mill

Vertical Grinding Mill
Vertical grinding machine set crushing, drying, grinding, grading transport in one, in the spodumene powder processing has some advantages:

1. High grinding efficiency, large output, vertical mill single-machine production can reach 6-80 tons, is the powder processing industry is relatively large grinding machine, suitable for large-scale mineral powder projects.

2. Finished powder quality is stable, vertical mill according to different fineness requirements, high precision powder selection, can ensure the quality of finished lithium powder, for the next stage of flotation and other aspects to provide basic protection.

Process

Stage 1:

The bulk material of spodumene is broken by the crusher to the fineness of the feed that can enter the mill.

Stage 2:
The small pieces of broken spodumene material are sent to the silo by the elevator, and then evenly and quantitatively sent to the grinding room of the mill by the vibrating feeder.
Fine powder processing generally choose vertical roller mill, YGM Raymond mill; Ultrafine powder processing generally choose CLUM ultrafine vertical mill, HGM ultrafine mill.

Stage 3:
After grinding, the spodumene is graded by the separator, and the unqualified powder is graded by the separator and returned to the host machine for re-grinding.

Stage 4:
The spodumene powder with the fineness meets the air flow through the pipeline into the dust collector for separation and collection, and the collected finished powder is sent to the finished product bin through the discharge port by the conveying device, and then the powder filling tank truck or automatic baler is used for packaging.

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