Smooth and stable
“The ZX350LC-6 is powerful and fast, as well as being easy to operate and enjoyable to work with,” says Dimitar Georgiev, who has been working with Persenk Invest for four years.
“It is smoother than the previous model, which means that I am not as tired after a long shift. The cab is also very comfortable and quiet – the best thing about this high-quality machine. It is perfect: stable, strong and well suited to the demands of a quarrying environment.”
The wheel loaders take over for the next part of the process – 3,500 tonnes of the crushed materials are moved every day into two piles by the first of the ZW310-6s. These are loaded periodically on to trucks that dump them into the feeding station for the secondary crushing and screening equipment.
The second ZW310-6 maintains numerous stockpiles and loads trucks in the stockyard with the finished products for onward transportation. “The ZW310-6 is very fast for moving between the stockpiles and even more productive than the previous model,” says operator Stoycho Guglev, who has also been with the company for four years.
“The joystick is effortless for steering, as well as being smooth to operate and easy to control the machine. Loading is straightforward thanks to the traction force associated with the LSD (limited slip differential). The most impressive feature is the comfort in the cab, with ample space and a lack of noise.”
Persenk Invest’s biggest customer, the Government’s national power station, is 160km away and other customer sites fall within a radius of 30km of the quarry. Between 45 and 70 trucks leave the quarry fully loaded twice every day, with an average of 3,000 tonnes sent to the power station daily.
The purchase of the new Hitachi models followed the confirmation of a three-year contract between Persenk Invest and the power station. Prior to that, the company had been supplying this customer via a third party.
“The marble materials delivered from our quarry to the power station are mixed with coal at a high temperature within the furnace,” says Ivan. “The result of this is that the emissions are less harmful to the environment.
“We have to deliver 2.5 million tonnes over the duration of the contract and we are currently supplying 3,000 tonnes per day. Our Hitachi machines and team of employees give us the capacity to increase productivity if required, but we are very happy to retain this flexibility and meet our customers’ demands.
“While the power station is now our largest customer, we will never stop supporting our other customers. We won’t forget them, because we’ve been working together from the beginning and we consider this market as the front end of our business.”