Curious objects

[greasemonkey 10]

I`ve just moved house and while clearing years of garden waste I found these odd things . they are made from steel slag ,saucer shaped,about 6 or so across and seem to be moulded.There was an old cottage on the site, could it be some form of decoration? Any suggestions would be welcome as I`m reluctant to scrap them but I am curious to what they could be

[Daven 10]

Could you post a photo of said objects ?

[Huxley 10]

Didn't they put things like this on the end of steel rods that strengthened walls of old buildings? like reinforcing bars with studs on the end going through walls...

[retep 68]

Crucible caps or crucible steel

[mad-dad 29]

Clay pigeons ?

[Daven 10]

Could it be one of these ?

https://www.google.co.uk/search?q=wall+washers+in+old+buildings+pictures&client=firefox-b&tbm=isch&imgil=qKGBVYQ6TAvgxM%253A%253Bwx2imr0Ch8daQM%253Bhttps%25253A%25252F%25252Fwww.dreamstime.com%25252Froyalty-free-stock-photography-adobe-wall-vintage-door-white-wash-old-building-weathered-wood-blue-screen-mary-shrine-leo-carrillo-ranch-image38879117&source=iu&pf=m&fir=qKGBVYQ6TAvgxM%253A%252Cwx2imr0Ch8daQM%252C_&usg=__jYs9ecol1DH8aDapcc0Uv7eSBZ8%3D&biw=1440&bih=785&ved=0ahUKEwiuue7-harPAhVlBcAKHQqTBV8QyjcIOw&ei=moPnV66EHOWKgAaKppb4BQ#tbm=isch&q=anchor+plate+wall+washer

 

An anchor plate wall washer used many years ago to secure a brick wall ?

There are a very many variations but all did the same job.

[greasemonkey 10]

Thanks for your replies , its given me something to think about .The crucible caps seems most likely ,I will keep them in my garden because they could be a bit of Sheffield history.Many thanks