Kakatiya Overseas

Hyderabad, Telangana

Purified metallurgical silicon is essential for the production of ingots and wafers for the solar and semiconductor industry. Currently, the most popular way of purifying metallurgical silicon is through the Siemens process. However, this process is very expensive, and it would be more favourable to upgrade the metallurgical silicon using high purity quartz.

Processing:

Metallurgical grade silicon (MG-Si) is produced through the reduction of quartz with carbon. In order to be used for solar applications, the silicon needs to be further processed. Directional solidification is often used to purify the silicon, as seen in the multicrystalline casting process. Directional solidification is a very important step in upgrading MG-Si, as the segregation coefficients enable the impurities to be separated between liquid and solid silicon phase. Controlling the direction of solidification enables the impurities to be concentrated in a single area of the cast ingot, which can then be removed. Boron and Phosphorus are very difficult to get rid of, however, as they do not respond in the same way as other impurities and need to be removed in a different way.

The slag for the refining process needs to have good viscosity, a different density to molten silicon to enable separation, suitable interfacial properties between the slag and the molten silicon to enable a high degree of interaction, a suitable distribution coefficient for the boron, and suitable basicity for the slag to optimise. The slag needs to promote oxidisation of the boron, but the Si should not be oxidised. Quartz is used because it won't create more SiO2, but break up to make Si and O2. A typical slag currently used in the market is a mixture of quartz and calcium oxide (CaO).

SP2-C works perfectly for slag processing of MG-Si. The special PSD and controlled, low levels of Boron and Phosphorous make it ideal for this use. For more information on this product.

Supply Details:

We would be pleased to discuss your advanced material requirements. All our products can be ordered on a range of flexible terms including short run, short lead time basis or supplied under long-term fixed price offtake arrangements to ensure your security of supply.we offer them customized Metallurgical Grade Quartz. We provide high volume material on a regular and consistent basis. Also, this Metallurgical Grade Quartz is produced for slightly less pure solar-grade silicon.

Quartzite is a metamorphic rock formed from Sandstone. It is a very hard and strong rock, and finds its use in countless places within the construction industry. This natural stone has a very detailed crystalline structure, which grants it a slightly lustrous and very rich appearance.

Process &Description :

The quartz grains that are present in abundance in sandstone recrystallize with the cements previously binding the stone, and form a distinct pattern of crystals locked at very tight angles close together. During the process, the original texture of Sandstone is destroyed as all the components are redistributed through the stone. Some cementing minerals migrate through the rock and form patterns of streaks and lenses, giving the Quartzite absolutely different look from the parent rock.

Since the crystals of Quartzite are very tightly packed, Quartzite acquires a very hard, angular surface. The stone is very strong and withstands heat and pressure without breaking or chipping. Quartzite never erodes or weathers because of its crystalline structure. As such, it does not hold layers of sand or soil on top of it either. This property is clearly visible in the bare, soil-less mountain tops that are formed out of this rock.

Due to high durability, non-slippery, fireproof properties, its formation, temperature resistance, hardness and easy maintenance has made the Quartzite Natural Stone as an ultimate stone for various construction projects all over the world. Our Quartzite Stone is best suited for making cobbles &kerbs, tiles, slabs, kitchen tops, counter tops, wall cladding, flooring, roofing, pool coping, pavings/riven pavers, landscaping, garden articles, full bull nose & half bull nose steps and risers, window sills, pebbles, walling stone, solid steps. We have carved a niche as one of the reliable, integrated, trustworthy Manufacturers of Natural Quartzite Stones based in India.

We are offering feldspar.Feldspar is a common raw material used in glassmaking, ceramics, and to some extent as a filler and extender in paint, plastics, and rubber. In glassmaking, alumina from feldspar improves product hardness, durability, and resistance to chemical corrosion. In ceramics, the alkalis in feldspar act as a flux, lowering the melting temperature of a mixture. Fluxes melt at an early stage in the firing process, forming a glassy matrix that bonds the other components of the system together. Feldspar is consumed in glassmaking( including glass containers and glass fiber) , pottery (including tile, electrical insulators, sanitary ware, and tableware) and other uses such as fillers.