All about Cement
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Industrial ecology

Cement manufacturing consumes non-renewable raw materials in large quantities and emits significant levels of CO2. To meet this challenge, Hima Cement Linited has been committed to industrial ecology: rethinking industrial processes to use one industry's waste products as resources for another.

Why find uses for waste?

Being conscious of its environmental impact, Hima Cement Ltd. has long sought ways to reconcile industrial needs with the preservation of ecosystems. Adding value to waste by using it as alternative fuel or raw material enables Hima to:

  • limit greenhouse gas emissions by reducing the use of nonrenewable raw materials and fossil fuels (oil, coal, etc.),

  • diversify energy resources and reduce energy costs by limiting dependence on traditional fuels,

  • serve the community by recycling waste that would otherwise need to be processed and eliminated.

 

In this way, Hima's practice of industrial ecology benefits the community and the environment while increasing efficiency and cost-effectiveness at a business level.

Clinker

Clinker is the main ingredient in cement. These hardened granules are obtained by firing a mixture of approximately 80% limestone and 20% clay to a high temperature. Cement is obtained by grinding clinker, in some cases supplementing it with additives.

 

Industrial waste

 

Industrial waste is the residue from industrial production, processing or use. Waste products from one industrial process can serve as alternative fuels and raw materials for another. Co-incineration enables enterprises to conserve fossil fuels and raw materials while serving the community by processing waste in an economical way that reduces CO2 emissions.

 

CO2 and cement

Why does manufacturing cement produce CO2?

 

Cement manufacturing is the source of 5% of global carbon dioxide (CO2) emissions. The cement industry is a natural producer of CO2:

  • 60% of emissions are due to the transformation of raw materials at high temperatures (decarbonation of limestone),

  • 40% result from the combustion needed to heat the cement kilns to 1500°C.

 

Alternative Fuels at Hima Cement Ltd.

The objective is to reduce carbon emissions by 30% substitution of fossil fuel by using alternative fuels that are available in the market. Hima Cement Ltd. is currently making use of the coffee bean and rice husks as alternative fuels to run the kiln. The utilization of these agricultural and forestry biomass residues prevents uncontrolled burning and dumping.

 

Through our Biofuels project, over 600,000 trees of high calorific value have been planted. The trees are to be shredded at maturity and used as alternative fuel.

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Industrial ecology

Hima Cement Limited has been working to reduce the environmental impact of its activities by finding ways to obtain value from waste products.

LafargeHolcim. Cement, aggregates, Concrete.