Blast-furnaces sentence example
Besides the sugar-refinery already mentioned, there were in Ig00 four tobacco factories, a national printing-press, an annular furnace for brick-burning, an iron-foundry and several blast-furnaces, under the management of the state.
In 1888 the Dowlais Iron Company (now Messrs Guest, Keen & Nettlefold, Ltd.) acquired here some ninety acres on which were built four blast furnaces and six Siemens' smelting furnaces.
The appendix de Benedictionibus to the Rituale Romanum contains formulae, often of much simple beauty, for blessing all manner of persons and things, from the congregation as a whole and sick men and women, to railways, ships, blast-furnaces, lime-kilns, articles of food, medicine and medical bandages and all manner of domestic animals.
In the neighbourhood of Millom there are blast furnaces and highly productive mines of red haematite ore.
The mining of these, together with blast furnaces and engineering works, occupies the large industrial population.Advertisement
It is especially used for drying hops and malt, and in blast furnaces where a high temperature is required, but it is not suited for reverberatory furnaces.
The material for filling may be the waste from earlier workings stored in the spoil banks at the surface; where there are blast furnaces in the neighbourhood, granulated slag mixed with earth affords excellent packing.
Among towns next to the capital, Luxemburg, are Echternach and Diekirch, both worthy of note for their blast furnaces.
There are blast furnaces in the neighbouring parish of Asfordby for the smelting of the abundant supply of iron ore in the district.
Their blast furnaces produce 1,700,000 tons of pig-iron annually.Advertisement
Magnetites were also early employed, at first in Catalan forges, in which by means of a direct process the metal was secured from the ores and forged into blooms without being cast; later they were smelted in blast furnaces.
The indirect process once established, the gradual increase in the height and diameter of the high furnace, which has lasted till our own days, naturally went on and developed the gigantic blast furnaces of the present time, still called " high furnaces " in French and German.
It has been calculated that the gas from a pair of old-fashioned blast-furnaces making i 600 tons of iron per week would in this way yield some 16,000 horse-power in excess of their own needs, and that all the available blast-furnace gas in the United States would develop about i,50o,000 horse-power, to develop which by raising steam would need about 20,000,000 tons of coal a year.
This " mixer " is a great reservoir into which successive lots of molten cast iron from all the blast-furnaces available are poured, forming a great molten mass of from 200 to 750 tons.
This is one of the principal centres from which the great ironstone deposits of the Cleveland Hills are worked, and there are extensive blast-furnaces, iron-foundries and steam sawing-mills in the district.Advertisement
Huge blast furnaces are in constant activity, and the output of rolled iron and steel is constantly increasing.
In 1840 this had grown to 241,000 tons, in 1845 to 475, 000 tons and in 1865 to 1,164,000 tons, almost the height of its prosperity, for in 1905 the product of 101 blast furnaces only amounted to 1,375,125 tons, and in the interval there were years when the output was below one million tons.
In 1901 the number of persons engaged in working of the raw material was 23,263, of whom 8258 were employed in steel smelting and founding, 7781 at blast furnaces in the manufacture of pig-iron, and 7224 at puddling furnaces and rolling mills.
It is also the centre of a mineral field, which yields large quantities of coal, iron, zinc and lead; its blast-furnaces, foundries, glass-works and engineering works afford employment to many workmen.
There are many large smelters and reduction plants in the state, most of them at Denver, Leadville, Durango and Pueblo; at the latter place there are also blast-furnaces, a steel plant and rolling mills.Advertisement
Roasted ores may be smelted in reverberatory furnaces (English process), or in blast-furnaces (German or Swedish process).
The matte is treated either in reverberatory furnaces (English process), in blast furnaces (German process), or in converters (Bessemer process).
The " American process " or " Pyritic smelting " consists in the direct smelting of raw ores to matte in blast furnaces.
The " German or Swedish process " is characterized by the introduction of blast-furnaces.
The ironworks and blast-furnaces are almost wholly in the midland districts.Advertisement
Its blast-furnaces and iron mills were long among the largest in the country, and the manu facture of steel is still the borough's predominant industry.
The district abounds in blast furnaces.
Ironstone is worked at several places and there are some blast furnaces.
A recent application is in the cooling and drying of the air blast for blast furnaces.
The capital invested in blast furnaces in 1905 was $5,939,7 8 3, they employed 1486 persons, and the value of their products was $3,428,049.Advertisement
The development of blast furnaces is practically the development of iron-smelting.
In some processes of lead-smelting, where the minerals treated contain sand, the long calciner is provided with a melting bottom close to the fire-place, so that the desulphurized ore leaves the furnace as a glassy slag or silicate, which is subsequently reduced to the metallic state by fusion with fluxes in blast furnaces.
The former are used principally as casing, walls, pillars or other supporting parts of the structure, and includes ordinary red or yellow bricks, clay-slate, granite and most building stones; the latter are reserved for the parts immediately in contact with the fuel and flame, such as the lining of the fire-place, the arches, roof and flues, the lower part if not the whole of the chimney lining in reverberatory furnaces, and the whole of the internal walls of blast furnaces.
Puddling furnaces are usually entirely cased with iron plates, and blast furnaces with hoops round each course of the stack, or in those of thinner constructions the firebrick work is entirely enclosed in a wrought iron casing or jacket.
Small air-furnaces with hot plates or sand bath flues were formerly much employed in chemical laboratories, as well as small blast furnaces for crucibles heated with charcoal or coke.Advertisement
Carnforth Haematite Iron Company had four blast furnaces at work in 1870.
The new blast furnaces were technically superior and increased productivity.
The Lowther HÃ¦matite Iron and Steel Works are in close proximity to the Lonsdale Dock, and consist of three large modern blast furnaces.
It is situated on the right bank of the Ostrawitza, near its confluence with the Oder, and it derives its importance from the neighbouring coal mines, and the blast furnaces and iron-works which they have called into existence.
From the steeple of the parish church the flames of no fewer than fifty blast furnaces may be seen.Advertisement