Holcim Group's vast international experience in this field, built over more than 30 years of uninterrupted commitment to environment care, ascertains that the following types of waste can be co-processed (pre-treated, if necessary, and co-incinerated) as alternative fuels (this list is not exhaustive though):
- used oils (motor, transmission, industrial oils), including oil filters
- sludge, acid and neutral tars, used earthy filters, wax waste resulted especially from oil and oil by-product processing etc
- rubber (including whole/shredded tires)
- wood (including wood treated with wood preservatives or painted wood)
- paper (including printed paper), cellulose waste resulting from paper production or recycling
- plastic masses (including used packagings)
- tars from the steel industry (coke ovens)
- waste resulted from water treatment (sludge)
- organic components from the pharmaceutical industry and the chemical industry
- organic components from the dyes, solvents and lacquers industry.
As for material recovery, the following types of waste can be co-processed in cement plants as alternative raw materials:
- blast furnace slag, fly ash from coal-fired power plants, pyrite ash,
- phospho gypsum and rhea gypsum (a residue resulted from the neutralization of sulphurous gas from thermo power plants)
- silica wastes, used sands,
- clay residual materials, especially from the metallurgical, steel, mining, energy and chemical industries.