To be fair, the steel industry energy consumption could be heavily reduced by investing directly into the manufacturing process. Complaining about green energy tariffs costing an industry too much when there has been so little investment in reducing the consumption is stupid. The point of these tariffs is so that industries are encouraged to stay energy efficient to stay profitable.
The energy usage would be null and void, in fact we'd be exporting electricity to the grid if money had been invested into the coke ovens.
The coke ovens "cooks" coal between 800 and 1250 degrees in a low oxygen atmosphere this outputs a gas, which contains high levels of carbon monoxide and ch4 and has a similar calorific value to natural gas. This should be used in a perfect world throughout the plant on boilers, flares and power turbines instead of natural gas.
But at the moment the byproducts plant is barely functional (when I was there its efficiency was at 10%...) so all the additions that should be removed and sold (tar,ammonia,benzine, nathpalene) are carried in the pipe work which blocks the pipes up and makes it hard to burn. Resulting in plants using natural gas in plant critical operations costing the company money.
Just an idea of the money that's being lost, a single lorry of benzene retails at £25k we were producing one a week, a fully working system will produce one a day, that covers the wages. We were burning of the ammonia instead of selling it.
There are bits and bobs like this all over the plant, like the hotmill. It's the biggest choke point in the steel works, it hasn't been upgraded since e 80s. Siemens came in 2012 to fit there kit at a cost of 80mil. This would have tripled out tonnage output as well as increased the amount of products we could roll successfully such as high silicone steel which goes for £120 per tonne. And the plant could run for a week before needing a roll cage instead of Dailey roll changes (2hours out everyday). But that was ignored because the blast furnace went over budget because we got a stupid engineering firm in who did things arse about face, Siemens ( control and instrumentation experts) were doing valves and abb ( very good valves were doing lagging and control systems).
The problem with the steel works is we promote brown noses and idiots out of the way whilst those that are good at there job are kept in the same positions. So there is no knowledge or brains Up top.