The Trumbull-Cliffs Furnace Company existed from 1920 to 1930. It operated a pig iron blast furnace and coking factory in Warren, Ohio, in the United States. The company was jointly organized by Trumbull Steel of Warren and Cleveland-Cliffs Iron Co. of Cleveland, Ohio. At the time it was built, it was likely the largest blast furnace in the United States. Trumbull Steel lacked the finances to build its own blast furnace, so it sought help from Cleveland-Cliffs. This led to a complicated financial structure.
Trumbull Steel merged with Republic Iron & Steel in 1928. Two years later, Republic bought out Cleveland-Cliffs Iron's interest in the blast furnace. This ended the Trumbull-Cliffs Furnace Company's independent history.
Background Trumbull Steel wanted to secure a regular supply of pig iron for its open-hearth furnaces. The obvious solution was to build a blast furnace adjacent to the steel plant, but Trumbull Steel lacked the financial capacity to build it and had no staff knowledgeable in the operation of a blast furnace.
Contract with Cleveland-Cliffs On April 20, 1920, Trumbull Steel and Cleveland-Cliffs Iron Co. entered into a contract to build a blast furnace at Warren, Ohio. The two firms jointly incorporated the Trumbull-Cliffs Furnace Company on May 6, 1920. The new firm was capitalized at $5 million (), issuing 40,000 shares of 8% preferred stock and 100,000 shares of no-par common stock. Each parent company spent $250,000 to purchase one half of Trumbull-Cliffs Furnace common stock. Cleveland-Cliffs spent $4 million to purchase all the preferred stock at par and appointed 4 of the 7 directors of the new company. Trumbull Steel had the right to buy out Cleveland-Cliffs after a certain period. The contract was approved by the Trumbull Steel board of directors.
The cost of the blast furnace land, construction, and equipment was estimated by the contract to cost $3.5 million (). Should there be cost overruns, Trumbull Steel was required to furnish these funds. In return, Trumbull Steel would receive preferred stock equal to the amount of the cost overruns. The contract also required Cleveland-Cliffs Iron to build and operate the blast furnace and to sell its products. In exchange for doing so, Cleveland-Cliffs received 1.5% of the net price of the pig iron the furnace sold to Trumbull Steel, and 2.5% of the net price of pig iron sold to other parties.
Trumbull Steel was a co-partner with Cleveland-Cliffs in the Mesaba Cliffs Iron Mining Co., and received one-fourth of the output of the mining company's iron mines. The Trumbull-Cliffs Furnace contract required Trumbull Steel to sell its Mesaba Cliffs iron ore to the blast furnace at regular market prices. If this did not provide all the ore needed by the blast furnace, then Trumbull-Cliffs was obligated to purchase ore from Cleveland-Cliffs Iron.
First supplemental agreement Cleveland-Cliffs intended to sell its Trumbull-Cliffs preferred stock on the open market and recoup its investment costs. The post-World War I depression left it unable to do so, and this put financial strain on Cleveland-Cliffs. On May 26, 1920, Trumbull Steel and Cleveland-Cliffs Iron signed a supplemental agreement: Until such time as Trumbull-Cliffs Furnace could pay dividends on its preferred stock, Cleveland Cliffs would pay the dividends in cash and receive 8% interest bearing promissory notes from the furnace company in lieu of the zero-interest implied debt of deferred dividends. This and a guarantee to redeem the preferred stock at par in case of liquidation was intended to reassure investors to which Cleveland Cliffs was trying to re-sell the stock (which included its own employees). In Moody's Manual this arrangement boiled down to "[Trumbull-Cliffs Furnace Co. preferred stock is] guaranteed as to principal and dividends by the Cleveland Cliffs Iron Company". Cost overruns required an increase to 45,000 preferred shares on December 1, 1920.
Construction
The Trumbull-Cliffs Furnace Co. purchased land on the Mahoning River directly opposite the Trumbull Cliffs steel plant, on which it erected a blast furnace. That made it 20% larger than the average blast furnace, the largest blast furnace in the Mahoning Valley at the time, and the largest blast furnace in the nation in terms of capacity. The press estimated the cost to be $3.5 to $4 million ( to (), somewhat higher than the contract's estimate.
Work on the site began the third week of May 1920. The company subsequently announced on May 27, 1920, that it would build a large coke and coke by-products plant as part of the blast furnace. The foundation of the blast furnace was laid on August 15, 1920, and it was completed June 14, 1921. That was a construction time record for a furnace that large.
About the plant The Trumbull-Cliffs blast furnace was designed by Freyn, Brassert & Co. of Chicago.
As Trumbull Steel had much unused land, it agreed to allow raw materials to arrive and be stored at the steel plant before being transported to the blast furnace. The blast furnace, in turn, would transport molten pig iron to the open-hearth furnaces of the steel plant.
The company wanted to build a "hot metal bridge" over the Mahoning River to provide this transportation connection. Title to the river was held by the U.S. federal government, so Congress had to pass a law permitting construction of the bridge. The company requested the legislation in September 1920, and President Warren G. Harding signed it into law in late May 1921. The bridge was a three-track concrete bridge. Ladles on rail cars transported the molten metal, while regular gondola cars carried raw materials. As raw materials arrived at the blast furnace, they were unloaded by a rotary car dumper that could handle 30 cars per hour. The cradle could move the entire length of the raw materials yard, placing the material in a concrete trough beneath the hoist.
The hoist was long, and ran on a double track. It was of a new design which had a cantilever over the blast furnace. Not only did this provide more room for raw materials beneath the hoist, it also made the hoist more rigid and put no thrust on the blast furnace. The hoist used buckets to scoop up material. Raw material could be delivered to a storage trough on the far side of the blast furnace, raw material stock bins in the cast house, or a , side-dumping, electric gondola "transfer car" on rails.
Both Blast Furnace & Steel Plant and Valve World magazines called the design and layout of the cast house "outstanding". The cast house was wide and long, with a central aisle more than wide. Tracks ran down the aisle, one for moving molten iron and the other for spotting and waste removal. The cast house also had coke, iron ore, and limestone storage bins, and a mixing room for clay, coke braize, and sand. There were nine ore bins, five limestone bins, four coke bins, and a central double-size coke bin. "Scale cars" ran on tracks below and beside the bins. These cars had equipment which showed how much load they were carrying, which permitted accurate measurement of raw materials before they were loaded into the blast furnace. The central coke bin fed coke to the scale cars. Blast Furnace & Steel Plant pointed out that the central bin was fitted with an "innovative" set of electrically powered screens which removed all coke pieces less than in size and shunted them aside, which provided more uniform coke which burned more efficiently.
The cast house also contained a pig iron casting machine. This could take cooled iron and cast two iron rails at a time.
The blast furnace could produce of pig iron a day. It was tall, had a bosh in diameter, and a hearth in diameter. Three Freyn-Brassert stoves heated the air which fed the furnace's tuyeres. The blast furnace was designed so that additional capacity could be added without interrupting the plant's operation.
The flue gas cleaning system was located adjacent to the blast furnace. It featured a by dust catcher, a dust whirler, and a gas washer.
Behind the gas cleaning system was a boiler house long, wide, and high, featuring a stack high. The five , class "M", Stirling boilers were of a new design, with exceptionally large volume and very high temperature settings. Each boiler had a distinct combustion chamber for natural gas and coal, so that coal stokers could be installed or the boilers expanded without interrupting their operation. A "Dutch oven" could be added to each boiler to generate even more power.
Valve World and The Iron Age magazines said the plant's water supply system deserved "particular mention" for its simplicity and efficiency. The pump house had a "novel design" which provided redundant backup water supply. The Iron Age also praised the "ingenious" safety system which used a sump basin and float which could divert water to the bustle pipe if the bustle ran low on water. To improve the supply of water to the blast furnace, Trumbull Steel built a weir dam on the Mahoning River downstream in 1922. Congress approved the legislation permitting the dam in July 1921.
Blast Furnace & Steel Plant lauded the "considerable advance in design" of the power house, which was long, wide, and high. It also noted that blast furnace plant had a much-improved system of natural gas delivery, one that was safer, easier to clean, and provided much-needed overhead space.
The blast furnace plant had rail connections to both the Pennsylvania Railroad and the Erie Railroad at its north end, and a connection to the Baltimore and Ohio Railroad at south end was planned.
The coking factory When the foundations of the blast furnace itself were laid in August 1921, Trumbull-Cliffs Furnace announced it would also build a large coking factory as part of the larger plant. This, too, was designed so that it could be enlarged in the future without interrupting its operation.
With onset of the post-war depression, the project did not begin moving forward until February 1923. The estimated cost of the coking plant, which had 47 coke ovens, was $3 million (). Trumbull-Cliffs Furnace financed the plant by issuing $3 million in 6% 20-year first mortgage bonds. Cleveland-Cliffs Iron agreed to let the project go ahead, even though payment of first mortgage bonds came ahead of payments for preferred stock dividends.
Construction on the coking factory began in January 1924. The coke ovens, which made coke and byproducts to be used by Trumbull Steel's plant across the river, were designed and built by the H. Koppers Co. of Pittsburgh. The plant was finished the first week of June and first charged on July 7, 1924.
The plant produced various industrial gases, tar, benzole, and ammonium sulfate. Trumbull-Cliffs Furnace estimated the coking plant could earn up to $900,000 () a year.
Second supplemental agreement The press widely reported that the final cost of the Trumbull-Cliffs Furnace was $3 million to $3.25 million. In fact, construction costs for the blast furnace were $5.3 million. Partly this was due to high post-war inflation, but partly of it was because Trumbull Steel had demanded alterations to the blast furnace that would enable it to be easily expanded in the future.
Trumbull Steel did not have the money to pay for the overruns. As Cleveland-Cliffs was unwilling to purchase more preferred stock and fund the cost overruns itself, Trumbull Steel and Cleveland-Cliffs signed another supplemental agreement on November 23, 1921.
Under the second supplemental agreement, the $1 million in initial capitalization set aside for working capital was used to pay for the overruns and an additional $1,300,000 would have to be raised. Trumbull-Cliffs Furnace agreed to seek bank loans and to issue promissory notes to obtain these extra funds. This second supplemental agreement was also approved by the Trumbull Steel board.
Blast furnace operations