Thanks lads, this is great info! I have ordered one of the books mentioned previously, hopefully it will give me an idea!
Looking at the older kilns (west side of valley?), I would think that the wagons offloaded the wet(raw) ore on the top line into some sort of hopper, which then gravity fed into the kilns itself. Would this have been through the back of the kiln somehow, or was it through what I would have thought was perhaps a chimney hole in the top?
Then I'm wondering if there was a grate at the base of the kiln to allow ventilation - or am I thinking too much of a domestic fire...? Modern kiln structures just don't match up to these as far as I can see, dunno.
Other kilns of the time (limestone mostly) appear to have a chute/funnel type thing at the front, with a vertical sliding door, lifted by a chain mechanism as a gate - but I think on these kilns this would have been an incredibly heavy thing to manage at the time - so was there a counterweight somewhere? There are a few pics I found with what appear to be gantry arms sticking out of the pillars between each opening. It would have to be simple to do, as some of the literature I found says that a lot of scrap metal and old rail tracks themselves were used for ongoing maintenance due to the immense wear and tear and very nature of the beast itself, and that no two kilns ever looked exactly alike due to the ongoing repairs with whatever materials were at hand. What do you think.
And then I have also heard that the men who loaded the hot calcined/dried ore into the wagons at the front, used 18' long poles to rake the ore out with... but did they stand on platforms to the side..., and if so what did these platforms look like/made of? Maybe wood, as there is no trace of them now, but would wood have been able to take the heat of the kiln without going up in smoke itself? I like the big shovel idea - will have a little go at that one to see what I can make of it.
I appreciate that the glow wouldn't have been anything like a furnace, but it must have been smoky and hellish all the same, and looking at the spoil heaps left over now, everything must have been coated in red dust rather than black... I know there is mention of the black seams of ore, but the spoil heaps are red - so is that an ore thing or is it as a result of the calcination process I wonder. And am I right in thinking that the kiln was loaded with a mixture of coal and ore, layered or otherwise?
There is also mention of the boilerhouse - what exactly was that for - was it actually related to the kilns themselves, or something to do with the trains?
So many questions, I truly appreciate any and every response!
Cheers M