Co-combustion in lime kilns

Lime production is one of the most energy intensive processes in the chemical industry. In order to reduce the energy costs alternative fuels can be used to replace expensive fossil fuels such as (powder) coal or natural gas. On top of that co-combustion of alternative fuels can reduce CO₂ emission, contributing to a better environment.

High quality fuel

In lime kilns co-combustion of alternative fuels sets high requirements with respect to the specifications of these fuels. The unique Subcoal^® process results in a high-quality fuel, which specifications are ideally suited for co-combustion in lime kilns. The low chlorine and ash-content meet the requirements of the lime industry, whereas the consistent moisture content decreases the variances in the caloric value of the fuel.

Rotary kilns

The different Subcoal^® products, ranging from fluff to pellets, are well suited for co-combustion in rotary lime kilns. Co-combustion rates can range from 5% to >30%.

Vertical kilns

The unique Subcoal^® powder concept allows the Subcoal^® pellets to be grinded into a fine consistent powder of <2 mm. This fine powder is characterized by a short burn-out time and opens up the opportunity to co-combust cellulose/plastic fractions in vertical lime kilns, in which co-combustion of such fractions has so far been non-existing.

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