Brazilian-Paraguayan cement importer Cemento Yguazu has plans to build a cement mill and clinker oven in Paraguay, according to a letter of intent signed by Cemento general manager Marcelo Castro dos Santos and addressed to Paraguay's industry and commerce minister Ernst Bergen.  The cement mill would be part of a first phase that will require investment of some US$12m and would be implemented in 10-18 months, say local sources. The mill would produce high-quality cement, making use of abundant raw materials in Brazil, as well as Paraguay where the company has its own deposit in Concepcion department locality Itapucumi, according to information cited from the letter.  Brazil's Cimento Itau and Camargo Correa Cimento control 70% of Cemento Yguazu and Paraguay's Concret Mix the remainder.