Nickel slag is a kind of solid waste slag produced during the smelting process of metal nickel and nickel alloy, that is, a granulated slag formed by water quenching of its high-temperature melt. With the continuous increase of nickel slag production line emissions and the increase of environmental protection, the comprehensive utilization of nickel slag has become a top priority.

Practice has proved that nickel slag can be used to prepare building materials including cement, concrete admixtures, cement products, etc. after grinding. For example, the use of nickel slag and blast furnace slag to produce composite Portland cement, the content of nickel slag can reach 15% to 50%, the slag content is 10% to 20%, the gypsum is 8% to 10%, and the rest is silicon. Salt cement clinker.

Vertical mill equipment working principle

The motor drives the grinding disc to rotate through the reducer, and the material falls from the feeding port to the center of the grinding disc through the feeder, and the hot air enters the grinding chamber from the air inlet. As the grinding disc rotates, the material moves to the edge of the grinding disc under the action of centrifugal force. When it passes through the annular groove on the grinding disc, it is crushed by the grinding roller and crushed. After the crushing, the material is brought up by the high-speed airflow of the wind ring at the edge of the grinding disc, and the large particles fall directly to the grinding disc. After re-grinding, when the material in the airflow passes through the upper classifier, under the action of the rotating rotor, the coarse powder falls from the cone to the grinding disc and is re-grinded. The qualified fine powder is ground together with the airflow and collected by the dust collecting device. The product, containing moisture, is dried during contact with the hot gas stream, and can meet the requirements of different humidity materials by adjusting the hot air temperature. By adjusting the classifier, the thickness required for different products can be achieved.