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Hydrated granular converter lime: Booster for soils

Converter lime

clevercalx® the lime fertilizer from thyssenkrupp Steel ensures a favorable pH value on agricultural land and makes important nutrients available to plants in the soil. The hydrated granular converter lime from the steelworks also delivers some additional effects.

Externally, industrial lime is distinguished from natural lime by its darker color. And the composition is also different: while the classic carbonic acid fertilizer variant is obtained from ground limestone, converter lime is the result of a reaction of lime and pig iron in steel manufacture . The industrial by-product is therefore rich in alkaline lime compounds and mineral components, including calcium, magnesium, phosphorus, manganese and copper. "In soils, these elements ensure an efficient lime fertilizer effect, support balanced plant nutrition and thus prevent deficiency symptoms," says the responsible sales manager, Dr. Uwe Pihl.

In addition, the smelting processes in the steelworks ensure that soluble silicic acid is formed – a chemical all-rounder that unfolds its versatile effect in the soil. One of them: the soluble silicic acid affects the rate at which the lime is converted depending on the acidity (pH) of the soil. "The effect that the lime has on the soil is either quicker or more lasting as a result. In this way, light soils in particular are well protected against overliming – and converter lime can be used for all fertilizer lime applications," Uwe Pihl knows from experimental observations and many years of practical applications.

clevercalx® converter lime: friability, invigoration and protection

Converter lime

On heavy, well-binding soils, the dissolved silicic acid contained in the converter lime reveals another useful property: it makes the soil friable, creates additional air voids and increases its ability to drain and retain water. At the same time, it ensures that phosphates and trace nutrients can be better absorbed via the root system. On top of that, the free silicic acid is stored in the plants like an immune system booster, and protects them from negative environmental influences or pests.

Fertilizer delivered to the field dust-free

The higher the lime content in the product, the better the effect on the soil. clevercalx® converter lime 44 from Duisburg is demonstrably one of the most effective grades. The smelter by-product is therefore not only delivered regionally, but also shipped to more distant locations in Germany via the company's own port. Distributors deliver the hydrated granular product directly to the edge of the field for the farmer.

Hydrated granular clevercalx® converter lime helps maintain soil fertility and contributes to balanced plant nutrition."

Dr. Uwe Pihl, Head of Converter Lime Sales at thyssenkrupp Steel

Back into the cycle

Converter lime

Last but not least, the secondary use of the smelter by-product also makes sense from a sustainability point of view: clevercalx® is available in large quantities, and its use reduces the energy-intensive mining and consumption of primary raw materials. Added to that: converter lime (CaSiO3), unlike natural lime (CaCO3) does not release CO2 emissions during chemical conversion in the soil.

clevercalx® converter lime – all advantages at a glance

  • Effectively and safely supplies all soils with lime
  • Contains valuable silicic acid and minerals
  • Promotes the absorption of nutrients and water
  • Convenient delivery to the field
  • Simple, low-dust application

General inquiry


** Mandatory


thyssenkrupp Steel Europe AG

Kaiser-Wilhelm-Strasse 100

47166 Duisburg, Germany

+49 (0)203 52-0

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