Agyag-Ásvány Kft.

Mining in the Romhányi-rög area began in the 1920s with outcrops. The exploration revealed a deposit of gray fire-resistant clay, which began to be produced using underground cultivation methods, initially employing rudimentary chamber excavation techniques. The clay was used in Romhányi and Szátok ceramic plants.
In 1949, the mine was nationalized, leading to the expansion of production and sales, the broadening of the customer base, and the construction of social facilities. Ceramic factories, such as the Budapest Porcelain Factory, the Kőbányai Porcelain Factory, the Alföldi Porcelain Factory, and the Dunaújvárosi and Ózdi Foundries, became customers at this time. In the 1960s and 1970s, the mine produced an annual amount of 120,000 tons of kaolin, a noble clay that is fire-resistant up to 1640 degrees Celsius. Around this time, 400 people were employed here, and all the mining took place underground.
eladás, a vevői kör kiszélesedett, szociális létesítményeket építettek. Ekkor váltak vásárlókká a kerámiagyárak, például a Budapesti Porcelángyár, a Kőbányai Porcelángyár, az Alföldi Porcelángyár, a Dunaújvárosi és Ózdi Öntödék. A ’60-70 években a most is bányászott kaolint -amely nemes agyag, 1640 fokig tűzálló- már évi 120000 tonna mennyiségben termelte a bánya. Ez időtájt 400 ember volt foglalkoztatva itt, és minden mélyművelésben zajlott. Az 1970-es évek elején a termelés a III. számú külfejtéssel bővült, ahol oligocén-kori nagyon finom szemcsézetű márgát (ez egy agyag-fajta elnevezése, kaolin, montmorrilonit,
In the early 1970s, production expanded with the opening of the III. surface mining site, where very fine-grained Oligocene marl (a type of clay called kaolin, a natural mixture of montmorillonite and illite minerals, mixed with some loess sand) was mined for the Romhányi Tile Factory. This tile marl is a beautiful, colorful coarse ceramic raw material. The extraction of fire-resistant clay also began in the 1970s, along with clay enrichment using a wet process. Although this method produced a product with a higher clay-mineral content, the costs increased so significantly that it was no longer economical to produce.