Hot Metal Trench The working end of the blast furnace, where molten metal would flow like lava out of the furnace… a process called ‘tapping’. Related Similar Images ...based on the tags: circles, cranes, ditches, furnaces, graffiti, machinery, pipes... Depending on the position of the valve, flour could be routed from the filtering process back into a mill. The projector booth, above the balcony in the auditorium. In the Lime House, the sunset picked-up the last light of day to make this image. Lime is used in the beet sugar refinement process to reduce the acidity of the beet juice mixture. A tunnel between the outside gate and the courtyard shared by the barracks. The ‘working’ part of the furnaces are about a story above ground level, so the catwalks snake above the tree line. The main floor of the hospital was crammed with furniture. The gulls wait to eat the next load of spilled grain. Arista 100. Lockers for the boiler room workers. Looking through the old brewhouse toward the Keg Wash House.