Since 1945, Great Lakes Calcium Corporation has been processing calcium carbonate from high calcium limestone that we bring into our dock at Green Bay, Wisconsin. Our primary market for the first forty years of business was the agricultural feed industry. They required a very pure calcium carbonate with specific particle size distribution for their various animal feeds. The feed labeling laws require consistency and purity of product, and we were able to meet and exceed their specifications, and gave them the advantage of a reliable local supplier.

In addition to serving the agricultural marketplace, Great Lakes Calcium Corporation has become very involved in industrial markets for calcium carbonate. We process the calcium carbonate that is used in papermaking. We were also involved in the initial research and supply of calcium carbonate for the capture of sulfur dioxide in fossil fuel burning boilers. Currently, we supply fluidized bed boilers, limestone injection systems and various air scrubbing devices. Recently, we have provided engineering firms with calcium carbonate to adjust the pH and tie up contaminants in the treatment of industrial wastes prior to landfill or incineration. In the past five years we have supplied calcium carbonate to remediation sites, where it is used to prevent heavy metals in contaminated soil from becoming soluble and polluting the ground water. We have designed flexibility into our process equipment that allows us to work closely with customers to produce the optimal product for them. Being locally owned helps us in making decisions in a timely manner, and responding quickly to customers needs. The use of low-cost vessel transportation for our raw materials enables us to provide our products at a very competitive price. We look forward to the challenge of working on new applications for calcium carbonate throughout Wisconsin and neighboring states.

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