Project Description
The project adopts internationally advanced cement production process technology. After it is put into production, it will achieve high quality, clean, low consumption and high yield. The 2 million tons cement grinding project widely promotes high technology and has advanced technology in the industry. The production process adopts advanced equipment such as efficient extrusion combined grinding system, DCS distributed automatic control system, large bag dust collector, etc. The main equipment is large-scale, the quality control means and facilities are complete, the quality is stable and reliable, and the product quality can be effectively guaranteed. In the production process, it has achieved advanced indicators such as low energy consumption and low dust emission. It has its own loading and unloading dock to ensure convenient and fast loading and unloading of raw materials and delivery of products. Cement products are in bagged or bulk form, which can serve key projects, concrete mixing stations, pipe pile factories and various industrial and civil construction projects.

Main process
1. Design of clinker grinding production line: After gypsum, rotary kiln clinker and limestone are weighed by belt scale, the prepared mixture is sent to the steady flow weighing bin by belt conveyor and elevator. In this process, the magnetic metal is removed by iron remover, and then the mixture is fed to one of the mills. All the extruded materials are sent to the cake elevator and the scattering classifier. The coarse materials larger than 2.5mm enter the steady flow weighing bin and then enter the mill for extrusion together with the mixture. The fine materials smaller than 2.5mm enter another mill for grinding. The materials out of the mill and the measured fly ash enter the mixed material elevator through the mill tail conveying chute, and are sent to the K-type internal circulation powder selector through the powder selector conveying chute. The coarse powder of the powder selector is returned to the mill, and the fine powder enters the finished product elevator through the air conveying chute and enters the finished product warehouse. The dusty gas out of the mill is purified by the mill tail dust collector and discharged into the atmosphere by the exhaust fan, and the collected fine powder enters the mixed material elevator.
2. Design of slag grinding production line: gypsum, dry slag and fly ash are weighed by belt scales, and the prepared mixture is sent to the mill through the elevator for grinding. In this process, the magnetic metal is removed by the iron remover, and the material out of the mill is sent to the mixed material elevator through the tail conveying chute of the mill, and is sent to the K-type ultra-fine special high-efficiency powder selector in two parts through the conveying chute of the powder selector. The coarse powder of the powder selector is returned to the mill, and the finished cement product is collected by the air box pulse bag dust collector. The fine powder enters the finished product elevator through the air conveying chute and enters the finished product warehouse. The dusty gas out of the mill is used as the primary air of the K-type ultra-fine special high-efficiency powder selector, and the fresh air is used as the secondary and tertiary air of the powder selector. The dusty gas is purified by the air box pulse bag dust collector and discharged into the atmosphere by the exhaust fan.
3. Mixing design of slag micro powder and clinker powder: In the separate grinding production process, in addition to meeting the fineness, the clinker powder and slag micro powder must also pay attention to the two problems of accurate measurement and uniform mixing. Therefore, we selected the spiral metering scale as the metering equipment, and the air conveying chute, which can be used not only as a mixing device but also as a conveying device. The spiral metering scale consists of an overflow single-tube spiral and a metering single-tube spiral. The former plays a role in stabilizing the flow to ensure uniform and timely feeding, and the latter performs metering to ensure accurate and stable metering; the air conveying chute uses the principle of fluidization to transport materials, so that the slag powder and clinker powder are constantly rolling and stirring during the transportation process.