C & B Marble Corporation | Products

Limestone (Calcium Carbonate)
C & B Marble is now one of the leading producers of marble blocks, slabs and tiles in the Philippines. A lot of marble products have been sold to the U.S.A., Australia, Italy, Japan, Korea, China, Taiwan, Singapore, Malaysia, South Africa, Saudi Arabia, United Arab Emirates and the domestic market.

In 2001, C & B Marble decided to put up a limestone crushing and pulverizing plant to maximize the utilization of limestone from its quarries in Norzagaray, Doña Remedios Trinidad and San Rafael, Bulacan. In May 14, 2002, the C & B Limestone Mill was inaugurated.

The C & B Limestone Mill can produce various products for agricultural, architectural and industrial uses. These products are specifically used for animal feeds (nos. 7, 8 and 20), for glass manufacturing (No. 30), for architectural uses (No. 10 and 5), and for other industrial products (No. 100 and Mesh 325, calcium carbonate). The plant rated capacity is 8,000 tons per month.

Production Process

The limestone boulders are crushed on the Primary Jaw Crusher (24"x36") that has a capacity of 60 tons per hour. The crushed materials with a diameter of less than 2" are stored on Silo No. 1 with a capacity of approximately 100 tons.
From Silo No. 1, the materials are further crushed on the Secondary Jaw Crusher (9"x16"), the size is less than 1" diameter. The capacity is 15 tons per hour.
From the secondary jaw crusher, the materials are pulverized using two (2) hammer mills, then screened to segregate the limestone to the desired grit size. Each product has its own silo and a semi-automatic weighing and bagging machine.

The available sizes and production capacity are:

For Animal Feeds - 7.5 tons per hour

For Glass Manufacturing

#30 - 2.4 tons per hours

For Architectural Uses - 0.5 ton per hour

For Industrial Uses and Animal Feeds

#100 - 2.4 tons per hour

For Industrial Uses

Mesh 325 (Calcium Carbonate) - 0.60 ton per hour

All the products are packed 50 kilos on a polypropylene sack.

Laboratory Analyses

Laboratory analysis was conducted by the Mines and Geo-Sciences Bureau last May 6, 2002 on the limestone sample submitted, and herewith are the result:

Chemical Processes

Lime, CaO,	54.45%
Silica, SiO₂,	0.07
Alumina, Al₂O₃,	0.96%
^*Ferric Oxide, Fe₂O₃,	0.089%
Magnesia, MgO,	0.47%
Moisture, H₂O (105 ⁰C),	0.09%
Loss on Ignation, LOI,	43.63%
^**Calcium Carbonate, CaCO₃,	97.18
^**Calcium Carbonate, CaCO₃,	97.18

^*Computed From Fe_T
^**Computed From Cao

Calcium Content (for Animal Feeds)² 38.58%(Average)

Physical Properties (Particle Size)³

Product Code/Distribution Percentage
Particle Size	No. 7	No. 8	No. 20	No. 30	No. 100	No. 325
Tyler #8	22.84%	0%	0.97%	5.38%	0%	0%
Tyler #16	73.68%	15.55%	81.95%	64.52%	3.47%	0%
Pass Tyler #16	0.48%	84.44%	17.07%	30.10%	96.53%	100%

Conducted by the Mines and Geo-Sciences Bureau, Department of Environment and Natural Resources on May 6, 2002.
Conducted by CARGILL Central Laboratory, Agribrands Philippines, Inc. on June 22, 2002.
Conducted by CARGILL Central Laboratory, Agribrands Philippines, Inc. on June 9, 2002.