Then followed a succession of mild explosions, throwing molten slags and splashes of metal high up into the air, the apparatus becoming a veritable volcano in a state of active eruption.
Its slags are made into bricks, cement, and glassy non-conductors of heat and electricity.
Such slags act very prejudicially by impeding the up-draught of the air and the sinking of the fuel; nor can they be removed by falling through a grate, like ordinary coal-ashes.
The door b serves for removing the slags and ashes from the bottom of V, as far as they do not fall through the grate.
The smelter, having first skimmed off the slags and other things with a hoe, pours the lead with a ladle into moulds, taking out the cakes after they have cooled.
The concentrates from washing are smelted together with slags (fluxes?
Afterward he again draws off the slags from the crucible, which the assistant does not quench by pouring water upon them, as the other slags are usually quenched, but he sprinkles over them a little water and allows them to cool.
The master stands at the one furnace and draws away the slags with an iron fork.
The smelter standing by the first furnace draws off the slags with a hooked bar.
Finally, the copper schists containing bitumen or sulphur are roasted, and then smelted with stones which easily fuse in a fire of the second order, and are made into cakes, on the top of which the slags float.
He then pushes the slags thus dried up towards the upper part of the hearth, and his assistant rakes them out by the back doors.
Other slags from the same furnace, and one from Dudley, furnished upwards of 2 per cent.
About three quarters of an hour after the commencement of the operation, he throws back upon the sole of the hearth the fresh slags which then float upon the bath of the outer basin, and which are mixed with coaly matter.
Very fusible slags flow down through the mass; and the iron, reduced and melted, passes finally through the coals, and falls into the slag basin below.
The sole of each furnace is formed of slags obtained in the smelting, and they are all of one kind.
In a short time the workmen resume their rakes, and turn over the slags along with the ore.
The latter now throws in a fresh quantity of lime, with the view not merely of covering the lead bath and preventing its oxidizement, but of rendering the slags less fluid.
This occasional cooling of the furnace is thought to be necessary for the better separation of the products, especially of the slags from the lead bath.
Lastly, when the furnace is producing a white metal, the slags are black, glassy, full of bubbles, and emit an odour of sulphuretted hydrogen.
The slags would all contain more or less metal; and when I inform you, that we can afford to remelt those slags if they contain only a half per cent.
Similarly, fused slags damp and filter through a cupel, but the molten metal not damping it withdraws itself into a button, which is retained.
It is occasionally found in iron and copper ores and in the slags from them.
The small quantity of copper which it retains is recovered by a subsequent "cleaning," together with theslags from the next operation.
In many cases (such as the analysis of slags and of some natural silicates where the percentage of alkalies is small) the percentage of soda and potash (which most commonly occur) need not be separately determined.
The tin is always best determined in the examination of slags by a separate assay carried out in this way.
The mineral is used as a flux in dry assaying; it renders slags which are thick from the presence of phosphates, &c.
Slags containing sulphides are especially apt to retain the more easily reducible metals.
Or, if the cupellation loss is neglected or calculated in some other manner, the slag or slags from the scorifier may be powdered and mixed with 20 grams of oxide of lead, 5 grams of borax, and 1 gram of charcoal.
If the copper thus got from the slags is coarse looking and large in amount, it must be refined; but, if small in quantity, it may be taken as four-fifths copper.
Iron and copper ores frequently contain molybdenum, sometimes in quantity; consequently it is met with in slags and pig-iron.
Slags are for the most part decomposed by boiling with aqua regia, but it will be found more convenient and accurate to first extract with acids and then to treat the residue as an insoluble silicate.
Owing to the siliceous nature of the ash of straw, it is desirable to have a means of clearing the grate bars from slags and clinkers at short intervals, and to use a steam jet to clear the tubes from similar deposits.
In very complicated mixtures, such as acid lavas orslags containing a large proportion of silica, amorphous and crystalline solidification may occur together.
Of this nature are in particular those slags found near the smelting-houses at the iron-mines of the Harz forest; and I myself have seen slags which were of a blue colour exceedingly beautiful.
Bruckmann[1486], that the ancients may have used such slags for their works.
On ascending to this spot, which can be easily done, I found the slags and ashes deposited in a sort of bed about four feet thick, and running horizontally along the face of the basaltic precipice twenty or thirty feet.
The ashes are in general observed to lie undermost, and the slags above them.
What struck me here was, that these ashes and slags are entirely unconnected with any rock or formation which seems to be in situ, or in its original position.
Nearly opposite to the West Causeway, and within about eighty feet of the top of the cliff, is found to exist a quantity of slags and ashes, unquestionably the production of fire.
The slags found in and about the various remains are broadly divided by Mr Macadam into two classes, which he describes as follows:-- (1.
The slags found about this furnace are of both classes.
He gathers this from the general character and composition of some of the slags found at these places.
A gray light porous mass, resembling the slags formed in blast furnaces at the present day; this slag contains a large proportion of lime, and a comparatively small proportion of iron.
Gairloch slags he has analysed, and at some modern ironworks quantities of ancient slag have actually been found worth resmelting.
This metal occurs occasionally in the slagsof iron works, in the metallic state, as small cubical crystals of a red color.
It was also remarked, that in the crystalline slags of furnaces, augitic forms were frequent, the hornblendic entirely absent; hence it was conjectured that hornblende might be the result of slow, and augite of rapid cooling.
Scoriae are usually of a reddish-brown and black colour, and are the cinders and slags of basaltic or augitic lavas.
In some of the amygdaloidal traps of Scotland, where the nodules have decomposed, the empty cells are seen to have a glazed or vitreous coating, and in this respect exactly resemble scoriaceous lavas, or the slags of furnaces.
Silicon Silversmiths' tools Size of piece, effect of Slags Sleeves, carburizing hardening and shrinking shrinking Solid solution Sorbite Specimens, test Standard S.
Only the electric furnace is able to produce the necessary heat and slags required to eliminate sulphur, and as a matter of fact the sulphur does not go until several other impurities have been eliminated.
Like silver in the furnace, we will run together with glowing light, and all slags shall lie cast out around the pure shimmering metal.
Silica has an important use in the form of silica brick or "ganister" for lining furnaces and converters in which acid slags are formed.
Recovery of chrome from slags resulting from the smelting of chromiferous iron ores was one of the war-time developments.
It was also remarked that in the crystalline slags of furnaces augitic forms were frequent, the hornblendic entirely absent; hence it was conjectured that hornblende might be the result of slow, and augite of rapid cooling.
In this way slags and cinders become incorporated with the bottom of the lava, and hence it is that so many volcanic rocks are scoriaceous, as well below as above.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "slags" in a variety of sentences. We hope that you will now be able to make sentences using this word.
