Established in 1967, to 2010, Phu Tho Cement Joint Stock Company has become a dry solution rotary kiln cement factory with the capacity of 350,000 tons.

Engaging in the program of cleaner production and energy efficiency in industry of the Ministry of Industry and Trade, annually, the company saves billions of dong thanks to technical improvements, energy saving and environmental protection by a series of measures: internal management, lighting system improvement, and equipment replacement.

With the lighting system, the company replaced signal lights with 40W lamp, T10 lights with T8 lamps, 200W incandescent bulbs with 50W compact bulbs. The company has also trained workers to turn off the power and fans when not in use.

During the process of internal management (drying kiln maintenance, closed furnace doors, repairing to avoid heat loss), the company has reduced 5-6% of power consumption, equivalent to VND800 million per year.

The change of equipment (including a change in position for the engines to suit the load, the replacement of jaw crushers with weighting machines, and installation of variable frequency for clinker incinerator fans and energy saving lighting devices...) has helped recover about 200 tons of product per year (about VND120 million), saving about VND600 million per year.

Besides, the company also focused on controlling the production process (defined operation of an incinerator for drying: the amount of water for coal mixing, restrain opening the door of material supplying kiln, fan mode, repair closed furnace to prevent heat loss through the furnace door) and has reduced consumption of dried coal (about 210 tons per year), equivalent to 115 million and reduced 259 tons of CO2 emissions.

The company also invested VND450 million to replace and repair the sealing buffers of material conveyors, clean production areas, water internal routes, plant trees, replace broken belts and bolts, maintain drying ovens, repair closed furnace doors. Expected economic benefit of these solutions is to reduce about 5-6% of electricity consumption (approximately VND800 million per year).

In the coming time, when solutions to improve the automatic material supplying system of cement crushers are implemented, 90% of dust dispersed in cement grinding area will be reduced (reduction of 360,000 kWh of electricity). The construction of coal storage will reduce approximately 927 tons of coal because coal will not lose heat or suffer from rain storms and washing. This solution can also reduce approximately 77 tons of coal sludge dispersed into the environment, and reduce about 180 tons of C02 emissions per year. The solution to renovate cement packing system will reduce approximately 200 tons of dust and 270,000 kWh of electricity consumption annually.

The company has been applying many other measures to minimize dust. If the maintenance of cleaner production measures is synchronously and regularly implemented, the company will achieve high efficiency in production. In the coming time, the company has set a target of reducing 100% of dust leakage in intermediary stages of the production process, reducing power consumption by 10% and material drying coals consumption by 7%, finally thoroughly reproduce solid wastes.

By Minh Duc