Industrial Minerals
Glass
Batch materials with tight iron limits and a consistent grain distribution.
The problem
A glass furnace is unforgiving. Iron decides colour, alkali decides the melt, and grain size decides whether the batch segregates on the way in. One off-spec cargo is days of production.
What we supply
Low-iron silica sand, soda and potash feldspar, and dolomite, each certified per lot against the iron ceiling you set rather than against a general grade sheet.
Choosing a grade
| What you are solving | What we would quote | Why |
|---|---|---|
| Flint container glass | Silica XQ-Glass | Fe₂O₃ to your ceiling, typically ≤ 0.03 % |
| Alumina and alkali source | Feldspar XS-Glass soda | Durability and working range |
| Magnesia source | Dolomite XD-Glass | Chemical durability |
| Glaze and frit | Feldspar XS-325 | Fine, consistent alkali |
These are starting points, not prescriptions. Send your current material's data sheet and we will match it properly rather than guessing from a mesh number.
Minerals for glass
3 of the minerals we supply end up in this industry. Here is what each one is actually doing once it is in the mix.
- Silica Sand — The main batch constituent; iron content decides the glass colour.
- Feldspar — Alumina and alkali source; improves durability and working range.
- Dolomite — Magnesia source; raises durability and widens the working range.
Silica Sand
Washed and graded quartz sand. Glass, foundry moulding and filtration.
Feldspar
Potash and soda grades. The flux in glass, sanitaryware and ceramic bodies.
Dolomite
Calcium magnesium carbonate. Flux, filler and magnesia source for glass and steel.
Every one of these has its own page with the grade ladder, the typical chemistry and the physical properties. If you already know the mineral and need the numbers, go straight there.
What we will ask you
- Glass type and colour
- Your iron ceiling as Fe₂O₃
- Grain size envelope
- Monthly tonnage and port or plant
Four answers are enough for a quote and a sample. We do not need a meeting first.
What you get back
- A delivered price per tonne or per pound to your ZIP code, not an FOB India number you have to convert
- A free sample of the grade we recommend, shipped from the United States
- The typical analysis and, with the sample, the actual mill test certificate for that lot
- A safety data sheet in US format before the material arrives
- A lead time you can plan a production run around
Working in glass?
Tell us the application and the tonnage. Quote and free sample back within one business day.