When the cement plant uses "waste"

Is this a cement factory? In the traditional impression, the scene of “grey head and grey face” disappeared. Instead, it was a continuous green tree, charming flowers and clear lake water.

Recently, the China Environmental Protection Century Bank interview delegation came to Guigang China Resources Cement Co., Ltd. The reporter was pleased to discover that not only industrial wastes such as mining waste stones and fly ash that had been previously abandoned can turn waste into treasure, but also the residual heat generated by the cement kiln. Can produce great value.

Turning waste into treasure, green production "Before the neighboring companies paid for us to help deal with industrial waste residue, we now have money to buy, but it is still difficult to buy." Assistant General Manager of China Resources Cement Co., Ltd. Bao Baofa told reporters that industrial slag also Instead of ore, mining can be reduced. “We need to mine about 5 million tons of limestone each year. Now, 800,000 tons have been replaced by various industrial slags. According to reports, more than 40% of the ore, gypsum, fly ash, etc. After industrial waste residue technology, 1 ton of cement can save 8.64 kilograms of standard coal.

At China Resources Cement Co., Ltd., clean production does not stop at the level of effective control of pollutant emissions. To maximize the use of waste, China Resources has paid close attention to its internal circulation and realized its best use. At the same time, their achievements in the regional cycle and the establishment of a community of economic interests among enterprises are equally gratifying: the use of the metabolic and symbiotic relationship with the surrounding industry chain, together with the surrounding enterprises to establish a recycling industry chain. Today, by-products such as fly ash, gypsum, and Guigang Steel Plants, Fangchenggang Steel Works, Liuzhou Iron & Steel, and Guigang Nanfeng Chemical Plant, which are by-products of various power plants in Guangxi, are used as raw materials for cement production, and they are also used in Nanjing Cement Design Institute. Cooperative development, burning city flammable waste as fuel in the kiln to reduce environmental pollution...

Forced out of waste heat power generation

"The consumption of coal, electricity, and water accounts for more than 70% of the company's costs. Without saving energy and reducing consumption, the company's life will become increasingly difficult." The relevant person in charge of the company told reporters that energy-saving emission reduction is the only way to reduce costs.

A common way to reuse waste heat from cement kilns is to incinerate waste and industrial waste. In the past, the cement kiln engaged in this business generally had the problem of “fighting to eat and eating poorly”. China Resources Cement Co., Ltd., through the transformation of low-temperature waste heat power generation technology and supporting equipment of cement kiln, opened up a new path for waste heat utilization in cement kiln. .

Into the factory area, the reporter saw this "bellied" cement kiln. The roar of a cylindrical rotary kiln roared and the 100-meter-high conveyor tube stood on one side. The staff member said: “The organic combination of the waste heat power station and the cement kiln system not only has no effect on the kiln firing, but also plays a role in stabilizing the heat of the kiln, and the cement product quality has been steadily improved.”

All along, China Resources Cement Co., Ltd. has made innovations and innovations in technologies such as slag mill, fly ash blending technology, and roller press reducer, etc., in order to further reduce cement screening, optimize quality formulas, and strictly control. Technical measures such as cement quality have made full use of the benefits of energy-saving and energy-saving in roller presses combined with grinding. At the same time, China Resources Cement Co., Ltd. uses advanced frequency converters, energy-saving fans and other energy-saving equipment, and adopts measures such as optimizing processes, reducing wind resistance, and reducing material transfer links in process design. In 2010, it reduced power consumption by 99 million kwh.

Zhai Baofa revealed to reporters that in 2012 the company will continue to transform the waste heat power generation technology. After completion, each cement kiln can increase power generation by 6.328 million kwh and save electricity by 3.16 million yuan.