Comprehensive Utilization Of Magnesium Slag | Magnesium Slag Grinding Mill For Sale

Magnesium slag is a solid waste discharged from magnesium smelting process in magnesium plant. The process for producing magnesium metal is roughly as follows: calcine dolomite in a rotary kiln, grind it into powder, mix it with ferrosilicon powder and fluorite powder, make balls, send it into a heat-resistant steel reduction tank, and reduce it in a reduction furnace at a temperature of 1190~1210 ℃ and under a vacuum condition of~10 Pa to produce crude magnesium. After refining with flux, casting ingots, and surface treatment, metal magnesium ingots are obtained, and the remaining residue is magnesium slag. How to make full use of magnesium slag has become a major theme restricting the development of magnesium industry in China. As the manufacturer of magnesium slag grinding mill, HCMilling(Guilin Hongcheng) will discuss the comprehensive utilization of magnesium slag with you below.

HLM magnesium slag vertical roller mill

The main components of magnesium slag are CaO, SiO2 and unreduced MgO. Due to different production conditions and processes of magnesium plants, the composition of magnesium slag is not fixed, but has a fluctuation range. The range of magnesium slag composition fluctuation: CaO is 40%~50%; SiO2 is 20%~30%; A12O3 is 2%~5%; MgO is 6%~10%; Fe2O3 is about 9%. According to its composition, the comprehensive utilization of magnesium slag grinding mill can consider the following directions:

1、 Manufacture of new wall materials by magnesium slag grinding mill

In China, it has been reported that magnesium slag is directly mixed with ground slag in a certain proportion, and composite activator is added to prepare cement. The research shows that the technology of using magnesium slag to produce wall materials is simple, the cost is low, and the energy is saved. Moreover, the cementitious material produced by this kind of metal magnesium slag has good cementitious properties. The wall material made of magnesium slag has small density, high strength, good durability, and the product quality meets the relevant standards. Most enterprises only use magnesium slag materials to make bricks. In fact, they can also add a certain amount of light aggregate into magnesium slag to make light thermal insulation wall materials or roof materials.

2、 Preparation of mineralizer after processing by magnesium slag grinding mill

Magnesium slag is a new mineralizer developed in recent years. The magnesium slag calcined at about 1200℃has certain chemical activity, which can reduce the nucleation potential of crystals, induce crystals, accelerate the transformation and formation of minerals, and reduce the heat consumption from raw meal to clinker. Therefore, the raw meal with different magnesium slag ratio can be burned to study the formula with higher tensile and compressive strength of clinker. Some research shows that adding about 10% magnesium slag into the raw meal can achieve good mineralization effect during calcination. The price of magnesium slag and fluorite is very different. Using magnesium slag as mineralizer instead of part of fluorite is very significant to reduce production costs and improve economic benefits.

3、 Production of building cement after processing with magnesium slag grinding mill

Magnesium slag can replace part of slag to produce mixed cement admixture, and the quality of cement produced is relatively stable. However, with the increase of magnesium slag, the early strength of cement tends to decrease, and the setting time extends. Therefore, when magnesium slag is used as the admixture for cement production, it should meet the relevant technical requirements of national standards.

4、 Production of masonry cement

Masonry cement is a kind of hydraulic cementing material made of one or more active mixed materials or hydraulic industrial wastes as the main raw materials, added with appropriate Portland cement clinker and gypsum, and ground. This cement has low strength and cannot be used for reinforced concrete or structural concrete. It is mainly used for masonry, plastering mortar, cushion concrete, etc. of industrial and civil buildings. The research shows that the activity of magnesium slag is higher than that of slag, and its grindability is better than that of slag and clinker. The production of masonry cement with magnesium smelting waste slag can significantly improve the activity of cement, increase the output, and reduce the energy consumption of cement production

5、 Production of composite Portland cement

Composite Portland cement is a hydraulic cementing material made of Portland cement clinker, two or more specified mixing materials, and an appropriate amount of gypsum. It is called composite Portland cement. The total amount of mixed materials in cement shall be greater than 20% and not more than 50% by mass. The principle of using magnesium slag to produce composite Portland cement is to add magnesium smelting waste slag into the raw cement, calcine it into Portland cement clinker, then add appropriate magnesium slag and other additives, and grind it to obtain composite cement (MgO mass fraction is about%). It should be noted that the magnesium slag is used to produce composite Portland cement, and the mixing amount should meet the limit requirements for the content of periclase in cement.

6、 Use magnesium slag vertical roller mill as desulfurizer after processing

Because the desulfurization technology of circulating fluidized bed boiler mainly uses calcium oxide for desulfurization, and the mass fraction of calcium oxide in magnesium slag is about 50%, it is meaningful to study the desulfurization performance of magnesium slag. The desulfurization effect is mainly related to the particle size, porosity, desulfurization temperature and other factors of magnesium slag. The smaller the particle size and the higher the porosity of magnesium slag, the higher the desulfurization efficiency of magnesium slag can be under the appropriate air excess coefficient and temperature.

7、 Magnesium slag grinding mill is used as road material after grinding

Magnesium slag can be used as a good road material because the content of calcium and magnesium in magnesium slag is very high, and it has relatively high activity. It reacts with soil in the base course to generate insoluble hydrated calcium silicate and hydrated calcium aluminate, which are in gel state or fibrous crystal, so that the connection and cohesion between the mixture particles are strengthened. With the growth of age, these hydrates are increasing, It makes the base course of magnesium slag mixture more and more resistant to load.

The comprehensive utilization of magnesium slag needs to go through the grinding process. Therefore, the magnesium slag grinding mill has become an ideal equipment for the treatment and utilization of magnesium slag. The magnesium slag Raymond mill and magnesium slag vertical roller mill produced by HCMilling(Guilin Hongcheng) can process 80-600 mesh magnesium slag powder according to the requirements of magnesium slag treatment. If you have a magnesium slag comprehensive utilization project, 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. Our selection engineer will plan scientific equipment configuration for you and quote for you.