Furnace example sentences

In most villages, furnaces fell into disuse and the amount of iron produced came down.As mentioned earlier, burning of fossil fuels (which contain sulphur and nitrogenous matter) such as coal and oil in power stations and furnaces or petrol and diesel in motor engines produce sulphur dioxide and nitrogen oxides.It was probably on account of all this noise that the blacksmith did not notice that a man had opened the gate and entered the forge, until he stood close up to the furnace.But the iron smelters had to pay a very high tax to the forest department for every furnace they used.Naturally the first thing he saw was the tall ragamuffin who had eased his way so close to the furnace that steam rose from his wet rags.The fire boy shovelled charcoal into the maw of the furnace with a great deal of clatter.In these furnaces, iron was mixed with charcoal and put inside small clay pots.Metallurgical coal is high grade bituminous coal which has a special value for smelting iron in blast furnaces.The fire in the furnaces has not yet been extinguished.The master blacksmith and his apprentice still sat on their bench, and iron and charcoal still glowed in the furnace.He looked at him with puckered brow, and it was easy to understand that when he had seen the strange fellow in the uncertain reflection from the furnace he might have made a mistake, but that now, when he stood there in broad daylight, it was impossible to mistake him for an old acquaintance.The furnaces were most often built of clay and sun-dried bricks.Non-biodegradable wastes are generated by thermal power plants which produce fly ash; integrated iron and steel plants which produce blast furnace slag and steel melting slag.None of them know that it is illegal for children like him to work in the glass furnaces with high temperatures, in dingy cells without air and light; that the law, if enforced, could get him and all those 20,000 children out of the hot furnaces where they slog their daylight hours, often losing the brightness of their eyes.Limestone is the basic raw material for the cement industry and essential for smelting iron ore in the blast furnace.