Billet Mill

billet mill

[′bil·ət ‚mil]
(metallurgy)
A rolling mill for making billets from ingots.

Billet Mill

 

a rolling mill designed for the rolling of blooms or ingots into billets of square or round cross section. The billets are later processed in specialized rolling mills (section and tube rolling mills).

Continuous and tandem billet mills, as well as mills with sequential arrangement of roll stands, are distinguished. Continuous mills are the most common type (see Figure 1). In such mills the metal being rolled is roughed alternately in stands with vertical and horizontal rolls, without edging, thus reducing the danger of crack and scratch formation on the surface of the metal. Individual drives for the mill rolls ensure regulation of the rolling speed and simplify the set-up of the mill and the roll-pass design. Continuous billet mills of very high capacity are in operation in the USSR; their output can be as high as 5 million tons of billets per year (1970).

Figure 1. Diagram of a 730/530 continuous billet mill with alternation of stands with horizontal and vertical rolls: (1)-(6) roll stands with rolls 730 mm in diameter, (7)-(12) roll stands with rolls 530 mm in diameter, (13) approach table, (14) intermediate table, (15) repeating table, (16)-(18) shears, (19) run-out table, (20) cooling bed for billets, (21) and (22) bridge cranes

In a modern continuous billet mill all technological operations are mechanized and automated; in some mills operations are controlled by electronic computers. In the USSR, continuous billet mills installed immediately following blooming mills roll blooms with cross sections of 300 x 300 to 400 x 400 mm into square billets with cross sections of 50 x 50 to 150 x 150 mm and, in some cases, into round billets with diameters up to 300 mm. Some billet mills are used to roll slabs (sheet bars) 180–600 mm wide and 50–100 mm thick. Tandem billet mills are used mainly to roll billets made from high-grade steel in small quantities. Billet mills with sequential arrangement of stands are used in rolling of skelp.

REFERENCES

Prokatnoe proizvodstvo: Spravochnik, vols. 1–2. Moscow, 1962.
Korolev, A. A. Mekhanicheskoe oborudovanie prokatnykh tsekhov, 2nd ed. Moscow, 1965.
Prokatnoe proizvodstvo, 2nd ed. Moscow, 1968.

A. V. ZINOV’EV

References in periodicals archive ?
Tenders are invited for Cleaning works in charging grids, furnaces, billet mill, totcbs, ecrs,shipping areas etc.
The Government of Pakistan is on its way to privatize this largest industrial complex of the country because it is on zero production-heat mode since June 10, 2015 after Sui Southern Gas Company Limited (SSGC) disconnected gas supply due to non-payment of bill worth Rs35 billion while some critical units like galvanizing plant, billet mill, bloom casters and billet casters are all closed for approximately 6-year now.
Simon's own father Robert McKeown, who was injured in the Billet Mill at Lackenby, Redcar, on April 16, 1963, is the first contributor.
Less blade wear and greater uptime of a billet mill saw are among the benefits from retrofitting an ABB motor and variable-speed drive (VSD) at Tata Steel's Stocksbridge plant.
Mr Lynch, 46, explained: "This site was the billet mill, steel ingots were heated to red-hot and then passed through huge rollers to be pressed down to billets of varying sizes.
This program was implemented for BMR of coke oven batteries, hot strip mill, billet mill, sintering plant, oxygen plant, slag processing plant and allied equipment, by various Russian and Chinese companies, though not done in an integrated and systematic manner.
Steel Canada announced that it has entered into an agreement to sell its bar mill and bloom and billet mill at its Hamilton Works to Max Aicher (North America) Inc.
By then, its new Ingersoll Billet Mill will be removing metal at a rate never before seen in the steel industry.
Chinese, Indian and North Korean companies toured the plants but only North Korea made a commitment to complete and lease the 100,000 tonne per year Epe billet mill until 2001.
Tenders are invited for Capital repair of valves and pipe lines in billet mill.
The PSM complex includes coke oven batteries a sintering plant furnaces steel converters bloom and slab casters billet mill hot and cold rolling mills galvanizing unit and 165MW of own power generation units supported by various other ancillary units.