Caleras San Juan SA,
Los Berros | Sarmiento, San Juan

In 2016, Caleras San Juan S.A., based in the province of San Juan, Argentina, placed an order with Maerz Ofenbau AG for a Maerz GGR lime shaft kiln, a stationary crushing plant and a roller mill for grinding petroleum coke at its lime plant in Los Berros.

The new E5-type kiln produces 300 tpd of quicklime or dolomite and can be operated either by natural gas or petroleum coke.

Financing the project was a particular challenge for all those involved. After several years of negotiations with various European credit institutions and the Swiss Export Risk Insurance (SERV), the contract  was awarded in December 2016 - the kiln has been operating successfully since 2018.

Caleras San Juan is pursuing a consistent growth strategy and has decided to build three further Maerz kilns over the coming years, each with a production capacity of 300 tpd. The company has also secured financing agreements with trusted partners for these new investments. The fourth kiln came into operation in June 2026.
Find out more from managing director and co-owner Raúl Cabanay in this interview.