Instead, up to 30% of its weight could be slag—the toxic gunk left over when steel is made.

反而，高达30%重量可以是矿渣，这是一种过程中产生有毒废料。

A dam broke on Friday causing mud and mining debris to flood into the city and in other parts of the region.

上周五，一座大坝决堤，导致泥浆和矿渣涌入城市和该地区其他地方。

The results: concrete slugs made with ingredients like fly ash and slag held up remarkably well after more than a month.

分为粉煤灰和矿渣混凝土塞一个多月以后依旧保持完好。

The workers wore sleazy working clothes to carry slag and slate.

工人们穿着质地薄工作服工找矿渣和板岩。

Now, the part of ejected scoriae and ashes seemed to my mind a very rough one to act.

现，喷矿渣和灰烬部分我看来是一个非常粗糙表演。

The solution? Novel blends of concrete that use cheap leftover materials from the coal and steel industries: fly ash, silica fume and slag.

有解决方法吗？使用粉煤灰、硅粉和矿渣等来自铁工业廉价剩余材料造新混凝土。

This uses calcium extracted from slag (a traditional waste product) and combines it with CO2 captured from blast-furnace gas to make high-quality calcium carbonate, which the startup plans to sell as a food ingredient.

该公司利用从矿渣（一种传统废品）中提取钙， 并将其与从高炉煤气中捕获二氧化碳结合， 高质量碳酸钙，该初创公司计划将其作为食品原料售。