Edison Ore-Milling Company
 Edison facility in Ogdensburg, New Jersey (circa 1895) | |
| Industry | Mining |
|---|---|
| Founded | 1880 |
| Founder | Thomas Edison |
| Defunct | 1899 |
| Products | Iron ore |
The Edison Ore-Milling Company was established by Thomas Edison in 1880. Edison brought significant technological advancements to the iron ore milling sector, yet the enterprise failed to achieve profitability. Toward the conclusion of its operations, Edison discerned the applicability of his innovations within the cement industry and subsequently founded the Edison Portland Cement Company in 1899.
Origins
During the 1870s, Edison recognized a shortage of iron ore in the eastern United States. Utilizing capital generated from his electrical inventions, he launched the Edison Ore-Milling Company in 1880 after identifying iron-rich sand deposits along beaches. He secured a patent for a process employing a large electromagnet to extract iron, aiming to lower expenses associated with low-grade eastern ore. Key collaborators such as William Kennedy Dickson and mining specialist John Birkinbine enhanced these extraction methods. Despite technological progress, competition from higher-grade sources like the Iron Range restricted market success, resulting in the company's shutdown after a few years.
Edison operated an iron mine within the Franklin-Sterling Hill Mining District near Ogdensburg, New Jersey through the New Jersey and Pennsylvania Concentrating Co. This site exploited an extensive low-grade magnetite deposit mined since the 1770s, which was processed by Edison's team using grinding and concentration techniques.
Strategic Shift
Following a short break, Edison re-entered the industry by modifying his approach to crush ore directly at mining locations. He initiated a pilot facility in Bechtelsville, Pennsylvania, close to iron mines before building one of the largest ore-crushing mills globally in Ogdensburg, New Jersey. Finished in 1889, this plant incorporated three enormous electromagnets and was designed to handle up to 1,200 tons of iron ore daily. The mill ground large ore pieces and included equipment to reprocess residues for further extraction. Nevertheless, ongoing technical challenges repeatedly disrupted production.
In 1890, Edison established the Edison General Electric Company, which merged two years later with Thomson-Houston Electric Company to form what became known as General Electric Company. He then redirected his focus back to iron ore with bold ambitions: "I'm going to do something now so different and so much bigger than anything I've ever done before people will forget that my name ever was connected with anything electrical."
That same year, he temporarily shut down the Ogdensburg facility for modernization, funding new machinery through General Electric stock sales aimed at boosting output capacity. He installed massive rollers intended to enhance ore processing volumes. Despite these improvements, previous difficulties persisted and attracting customers remained challenging.
Divestment and Industry Transition
By the year 1899, Edison conceded that the enterprise had not succeeded and consequently ceased all operations, reflecting on the financial outcome by stating, "the money is all spent, but we certainly enjoyed the experience."
The method produced substantial quantities of residual sand, which Edison marketed to cement producers. This sand contributed to improving the strength and durability of cement. Following the sale of the ore-crushing machinery to mining operators, Edison shifted his focus toward the cement sector, adapting certain ore-processing technologies for this new application.