Resources conservation

In modern cement production all technologies are aimed at natural resource preservation, especially raw materials and fuel. This preservation in cement production could be reached due to:

    1. energy consumption is decreased due to  shifting to other technologies (like Shurovo cement plant Expansion project);
    2. reduction of clinker percentage in cement is reduced due to usage of additives and alternative raw material;

Portland cement is the product of fine clinker grinding and gypsum added in order to regulate strengthening period. Clinker is produced in the process of burning of raw meal with specific chemical composition in rotary kilns. There’s a possibility to substitute clinker by other materials for producing various cements. Quality standards restrict unlimited additives usage. However, some types of them are widely spread in the industry: natural – volcanic tufa, limestone, by-products of other industries – ash dust from coal heat stations, blast-furnace slag from iron industry and others. The usage of additives improves such cement and concrete qualities as strength, chemical influence redundancy, hydration temperature. Thus we can meet the interests of our clients and reduce natural resources consumption. 

    1. alternative fuel resource usage.

      Cement production process is very specific, especially clinker burning in rotary kilns with the temperature of 2000оС and gives the possibility for usage of large amount of utilities such as AFR. The world practice proves that usage of cement kiln for burning of utilities has many advantages:

      • the acid gases are neutralized – sulphur monoxide and hydrogen chloride, limestone;
      • heavy metals are absorbed by clinker structure;
      • no by-products are produced, such as ash or liquid sediment from gas cleaning;
      • waste heating value usage;
      • high temperature of flame is reached (2000оС).

At Holcim plants some part of traditional fuel – natural gas – is substituted by burning industry wastes such as: worked-out oils, dissolvents, worn-out tires, plastics, paint industry slag, food wastes, paper industry wastes.