I can get it for $20 a 50lb bag. Here its $30 for Soda, and I was wondering if Calcium Carbonate is better in or equivalent or worse than soda? I am also curious what any of you guys would pay for a pallet 40 50lbs bags shipped to your business?
Says Calcium Carbonate is already used as a blasting media called Finicall. It is 2.5 hardness same as baking soda but less residue. Comes from crushed lime? Says it causes less oxidation than Sodium bicarbonate. Anyone use it? I see a lot off suppliers sell it but I never used it, I have to buy a couple bags and try but if someone has let me know.
Haven't tried it either but I know that soda is the same mineral as the baking stuff but it is not ground in to a powder so it will work for blasting. I imagine when they sell the C.C. for blasting it is also prepared differently and worth the extra cost. Just my guess.
Commercial quantities of baking soda are also produced by a similar method: soda ash, mined in the form of the ore trona, is dissolved in water and treated with carbon dioxide. Sodium bicarbonate precipitates as a solid from this method:
It seems to be a little of both. They mine the first part and then make the soda from it. Then they would crush it differently for us vs a muffin.
We use and sell calcium carbonate as a blasting material. It is harder than soda and also more productive. Our coarse calcium carbonate can actually strip mill scale.
It's a dusty material and can leave chalky impregnations in the substrate. However in my experience it's quite a good material for non porous, flat surfaces, making a surface profile that is barely noticeable even when blasting at around 60 psi.
We use it to restore marble graves here. I recommend it to my customers as a cheaper alternative to soda. Also, I'm no chemist but I never really liked the idea of blasting surfaces with hygroscopic salt.
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