Trusted Dolomite Powder Manufacturer for Glass Industry in India
Dolomite for Glass Industry, Built on Consistency
Glass manufacturing runs on precise chemistry, and dolomite plays a bigger part in that mix than most people outside the industry realize. At HTMC Group, we've spent years fine tuning our process to become one of the trusted names for dolomite for glass industry in India. Our dolomite doesn't just meet spec on paper, it stays consistent load after load, and that matters a lot when you're running a continuous furnace that can't afford surprises mid batch.
As a dedicated Dolomite Powder Manufacturer for Glass Industry, we know glassmakers can't tolerate wide swings in raw material quality. Even a small rise in iron content or an uneven particle size can throw off melt clarity or push up energy use at the furnace. That's why every batch of our dolomite for glass industry in india goes through checks from the mine face right through to the packed bag. If you'd like to see what else we supply, take a look at our full dolomite product range that serves industries beyond glass as well.
Why Dolomite Matters in Glass Manufacturing
Dolomite, chemically calcium magnesium carbonate CaMg(CO3)2, brings magnesium oxide into the glass batch. This lowers the melting temperature a little and improves the chemical durability of the finished glass, which is why it's used alongside limestone and soda ash in most modern furnaces. Container glass, float glass, and even some fiberglass formulations lean on a steady, predictable dolomite supply to hit their target strength and clarity. Skip it, or switch to an inconsistent grade midway, and it usually shows up as seeds, streaks, or color drift in the finished product.
- Mining: We source ore from mine faces selected for naturally low iron content, since iron oxide is the one thing glassmakers really don't want in their batch.
- Processing: The ore gets crushed and ground to the mesh size your furnace actually needs, usually finer for float glass and a touch coarser for container glass.
- Quality Control: Every dispatch is checked for CaO to MgO ratio and residual iron before it leaves our plant, not after a complaint comes in.
- Packaging and Distribution: Packed in moisture resistant bags so the material doesn't clump on the way to your batch house, and shipped on schedules that match production runs, not just convenience.
- Colour: Usually white to light grey for glass grade, since darker specks can carry trace iron along with them.
- Hardness: 3.5 to 4 on the Mohs scale, which keeps grinding wear on equipment reasonable.
- Specific Gravity: 2.8 to 2.9, denser than limestone and that affects batch weighing calculations.
- Purity: Low silica and low iron oxide, kept well inside the tolerances glass plants set for clarity grade material.
Applications of Dolomite in Glass Industry
- Float Glass: Used in architectural and automotive glass production, where low iron dolomite keeps the finished sheet clear rather than tinted.
- Container Glass: Bottles and jars need chemical resistance against whatever they're storing, and dolomite helps the glass hold up over time.
- Fiberglass: For insulation and reinforcement applications, dolomite helps control the viscosity of the melt during fiber drawing, which isn't something you can fudge with a lower grade material.
- Tableware and Technical Glass: Everyday glassware and technical glass that sees thermal shock both benefit from the added durability dolomite brings to the mix.
Grades of Dolomite We Supply to Glass Manufacturers
- Low Iron Dolomite: For float and container glass, where clarity isn't something you can compromise on.
- Fine Mesh Dolomite: Ground to 200 to 400 mesh so it dissolves evenly through the batch instead of sitting as unmelted grit.
- Standard Industrial Grade: Suited to general glass melting where cost efficiency matters as much as ultra high clarity.
- Custom Mesh on Request: Some furnaces want a very specific particle distribution. We can match that, just tell us the spec.
How We Process Dolomite for Glass Grade Requirements
- Extraction: Ore is pulled from mine faces already known for low iron content, so we're not fighting the raw material from step one.
- Crushing: The extracted dolomite is reduced to a manageable size close to the mine head, cutting down on transport dust and loss.
- Grinding: Milled down to whatever mesh size your furnace calls for, using equipment tuned for consistency rather than raw throughput.
- Magnetic Separation: Passed through magnetic separators to pull out stray iron particles. This step matters more for glass grade dolomite than almost any other industry we serve, honestly.
- Drying and Packaging: Fully dried before packing, since even trace moisture can cause dusting or clumping issues once it reaches your batch house.
Powder mesh available
100
200
300
400
500
600
Packing Available
25kg Packing Bag
50kg Packing Bag
500/100kg Jumbo Packing Bag
Frequently Asked Questions
Dolomite supplies magnesium oxide to the glass batch along with the calcium oxide it already gets from limestone. This combination lowers the melting point slightly and improves the chemical durability of the finished glass, which is why most float and container glass formulations include it in a fixed ratio.
We source ore from mine faces with naturally low iron content, then run it through magnetic separation before drying and packing. That extra step matters here more than in most other industries we serve, since even trace iron can cloud the clarity glassmakers are chasing.
That depends on your batch mixing setup. Float glass units usually prefer a finer mesh, somewhere around 200 to 400, so the material dissolves evenly. Container glass plants can often work with a slightly coarser grind. We supply mesh sizes from 100 up to 600, and we can also grind to a custom spec if your furnace needs something specific.
Yes. Our low iron dolomite grade is built specifically for float glass and clear container glass, where any tint in the finished product isn't acceptable. It goes through the same magnetic separation and quality checks as our other grades, just with tighter iron oxide tolerances.
We pack in 25kg and 50kg bags for smaller or trial orders, and in 500kg to 1000kg jumbo bags for continuous furnace operations that need bulk handling. All bags are sealed to resist moisture during transport and storage.
That's actually most of our glass industry business. We work with plants on scheduled dispatches tied to their production cycles rather than one off orders, and we keep the same grade and mesh consistent across every shipment so your furnace parameters don't need re-tuning each time.
Contact Us
Mail Us:- contact@htmcgroup.com
Call Us:- +91 33 2226 8228, 98114 09161
Get in touch with us!
×