Anthracite iron century. Research into the smelting of iron using anthracite coal (without coking it first) began in the 1820s in Wales by Thomas, experiments in France, most notably by Gueymard and Robin at Vizille in 1827, and in the 1830s in Pottsville & Mauch Chunk, Pennsylvania. Early attempts tried to gradually substitute anthracite for other fuels, such as coke or charcoal, but all failed due to the use of cold blast techniques, which generated insufficient heat to keep the anthracite in regenerative combustion. In the same time-frame, Thomas had also continued experimenting with mixes of Anthracite and other fuels, before he
Anthracite iron technique & process, which he had conceived in an attempt to improve the efficiency of conventionally fueled furnaces. The first person to employ the hot blast technique to anthracite smelting was Dr. Frederick W. Gesenhainer, who filed for a patent on the process in 1831 and received it in 1833. In 1836, he tried smelting anthracite iron on a practical scale at his property, Valley Furnace, near Pottsville, Pennsylvania, while in the same year White & Hazard's LC&N Co. built two experimental blast furnaces in Mauch Chunk. He produced a small quantity of iron, but due to mechanical breakdowns, could