The steel slag is mainly used as the base material for road construction, or the steel slag is made into balls by using the high content of CaO, Fe0 and a certain proportion of Mg0, MnO and other components, and then returned to the steelmaking furnace for use as an effective flux, which can reduce the ore consumption and energy consumption. But in these applications, the utilization of steel slag is limited and the added value is very low In order to improve the utilization and added value of steel slag, a very effective way is to produce steel slag cement by using steel slag superfine grinding as cement mixture, or use it as active admixture of concrete to prepare high-performance concrete. HCMilling(Guilin Hongcheng), as the manufacturer of steel slag superfine mill, will introduce the process technology of steel slag ultrafine powder mill.

The steel slag tail slag is ground into steel slag powder, and the median particle size of steel slag powder is generally 12~15 μ m. Less than 30 μ M is generally about 80%. Steel slag powder not only has small particle size, but also changes in its crystal structure (lattice dislocation, defect deficiency and recrystallization) and surface physical and chemical properties, which increases the activity of steel slag and accelerates the hydration reaction, becoming a hydraulic cementing material. The steel slag grinding mill superfine powder technology is mainly divided into ball mill grinding technology, horizontal roller mill grinding technology and steel slag vertical roller mill technology. The following describes the process technology of the three types of steel slag grinding superfine powder:

1. Ball mill is used for ultra-fine grinding of steel slag: the ball mill system is the earliest steel slag grinding treatment system adopted in China, which has the advantages of low operation requirements and low investment, but high energy consumption (unit power consumption 90 kW. h/), small single machine capacity, and low treatment efficiency when producing high fineness steel slag powder. In addition, the production process is complicated, and the steel slag micro powder with high specific surface area can be produced in two stages: primary grinding and final grinding. The production cost is high, and the civil engineering cost is high. Steel slag primary grinding system: the pre grinding closed circuit extrusion process system is composed of a roller press, a V-shaped powder concentrator and a dust collector. The materials are gradually refined and pulverized after multiple extrusion, sorting, iron removal and drying. The fine materials are collected by the dust collector and enter the steel slag final grinding system. The production capacity of the primary grinding system is 32 t/h, and the specific surface area of steel slag fine powder (semi-finished product) is about 260 m2/kg; Steel slag final grinding system: a closed process system for final grinding is composed of a ball mill, a high-efficiency powder concentrator and a dust collector. After several times of ball milling, sorting and further pulverization, the semi-finished powder is finally ground to the finished steel slag fine powder product, which is collected by the dust collector and enters the finished product bin. The production capacity of the final grinding system is 32 th, and the specific surface area of the product (steel slag powder) is ≥ 450 m2kg.

2. Ultra fine grinding of steel slag by horizontal roller mill: the principle of horizontal roller mill grinding process is between roller press and ball mill, and it is characterized by a revolving cylinder embedded with lining plate, in which the pressure and grinding pressure generated by round roller and cylinder are used to grind materials. The process equipment has low energy consumption, small wear, grinding fineness of 470-500 m2/kg, and power consumption of main machine of 31 kW. h/t. However, the initial investment is large, the domestic equipment technology is not mature, and the equipment needs to be imported from abroad.

3. steel slag vertical roller mill for steel slag micro powder: the production process of vertical roller mill integrates crushing, grinding, drying and powder selection, which is characterized by low power consumption, good sealing performance, small floor area, simple process, etc The required fineness and particle size distribution can be obtained by adjusting the rotating speed of the powder concentrator, the air flow rate of the mill fan and the grinding pressure. The grinding fineness of finished products can be controlled at 300~600 m2/kg. HCMilling(Guilin Hongcheng), as the manufacturer of HLM vertical roller mill, our HLM steel slag vertical roller mill has become increasingly mature in the process technology of applying it to the ultra-fine powder of steel slag grinding mill. Compared with the ordinary vertical roller mill, our grinding fineness is finer, the particle size can be controlled to more than 700 meters, and the power consumption of the main machine is lower and more energy-saving.

The above introduces the process technology of three types of steel slag superfine grinding mill. The specific selection can be determined according to your investment budget, plant construction and production demand. If you have the demand for process technology consultation of steel slag superfine grinding mill, please contact mkt@hcmilling.com or call at +86-773-3568321, HCM will tailor for you the most suitable grinding mill program based on your needs, more details please check www.hcmilling.com.