Hwange Colliery managing director Thomas Makore was quoted by Reuters as saying: "The contract is actually for coke. So there is a spot purchase, they are buying stock that we have right now as well as trial of our coke products for some of their operations over a six-month period."
The financial terms of the deal and tonnage have not been disclosed.
The company operates a mine in northwest of the country, and intends to increase its monthly production to over 300,000 tons this year.
It supplies coal to state-owned power utility Zimbabwe Power Company.
Zimbabwe Government holds 37% stake and British businessman Nicholas van Hoogstraten has 20% interest in Hwange Colliery.