Moreover , adding slag to the clay reduced by a third the amount of carbon dioxide each brick released during its manufacture , because wood pulp is added to clay before it is fired , and less clay means less pulp is needed .
Bricks show no loss of useful mechanical properties even when 20-30 % of their content is slag .
即使20-30%的成分都是炉渣,砖块的有效力学性能也丝毫未损。
Citadel capital is running 42 barges along the length of the nile in egypt and has built or refurbished seven river-ports between alexandria and aswan , mostly to ship grain , coal , slag and clay .
When the gas is cooled , any hazardous elements in the waste end up sealed in a glassy slag that is safe to put into landfill .
当气体冷却,任何有毒的物质会被封在玻璃状的熔渣中,被安全的填埋。
" This place was hell , " says tom levy cheerfully as he stands over an open pit filled with ancient coal-black slag .
“这个地方以前几乎是个地狱,”托马斯莱维风趣的说到,他站在一处被古老的墨黑炉渣填满的露天矿坑中。
They both involve heating , rather than burning , waste until it breaks down into a flammable mixture of carbon monoxide and hydrogen , called syngas , and residual char , ash or slag .
Ze-gen , based in massachusetts , gasifies waste by injecting it into molten steel . The syngas rises through the pool , heavy metals sink to the bottom and other contaminants form a slag on top .