Use of technical grade concentrate in glass making The low-iron, technical grade concentrate that Frontier will produce during Phase I, will presumably be marketed to the glass-making industry. It’s use in the industry is well established (see below) so pricing should be known with reasonable confidence. In their May 2023 PFS, Frontier used technical grade pricing of US $3000/t vs US $1200/t for chemical grade, a 250% premium. It appears that the concentrate can be added directly to the glass melt (somebody correct me if I’m wrong), which means that this concentrate will not need to be shipped to China for further refining.
“With the advent of new energy vehicles, lithium batteries have become the focus of attention and the subject of scientific research. Lithium-containing minerals not only have great potential in the field of new energy, but also have important functions and play a special role in the high-grade glass industry. Both spodumene and petalite are lithium-containing minerals and are raw materials for extracting lithium. The two are often produced in granite pegmatites and become paragenetic minerals. Because of its special physical and
chemical properties, it is widely used in the production of high-grade glass and ceramics.
1. Glassware
In the production of glassware, although lithium oxide is not an important part of the glass composition, it has excellent melting ability, which can reduce the melting temperature, prolong the service life of the furnace, improve the melting efficiency, and thus improve product quality. Adding spodumene concentrate can be used to produce high-grade glassware for packaging of
cosmetics. Low-grade glass-grade spodumene has also been gradually accepted by the market.
2. Tableware
In the production of containers, the Fe2O3 content of tableware is significantly lower than that of similar products. The use of spodumene with high lithium oxide content and low iron content can ensure that the product meets the specified color requirements. In addition, high-quality spodumene can not only lower the melting point, but also reduce the viscosity of the melt. Therefore, the formability is good, and the production efficiency will be significantly improved.
3. Fiberglass
The use of lithium oxide in glass fiber production can not only reduce the damage of fluorine to the environment, but also have the same effect as in the production of glassware, such as lowering the melting point and improving the melting effect, thereby improving production quality. The viscosity of the melt is low, easy to operate, low working temperature and long service life of the equipment.
4. TV display screen
Lithium oxide extracted from spodumene concentrate or petalite is the main component of monochrome televisions. The combination of lithium oxide and barium reduces the radiation transmitted through the panel, improving the molding characteristics and surface finish of the display. In the application of color TV, since the use of lead is gradually banned, it is replaced by lithium oxide. Zirconia and barium are increasingly used in formulations, while lithium oxide is used as a flux.
5. High temperature ceramic products
In the established ceramic industry, lithium is an important part of the formulation. Spodumene as a low expansion rate filler contributes to the formation of the low expansion rate lithium aluminosilicate phase. Add a large amount of spodumene, and choose an appropriate calcination temperature, the following reactions occur:
Li2O.Al2O3.aSiO2+SiO2= Li2O.Al2O3.8SiO2
(spodumene) + (
silicon oxide) = (β-spodumene solid solution)
Free
silica is assimilated in β-spodumene solid solution, exhibiting almost negligible thermal expansion. Therefore, the product has thermal shock resistance.