Technical and economic analysis of a new process for drying and calcining light magnesium oxide

Technical and economic analysis of a new process for drying and calcining light magnesium oxide

Compared with the old process, the new process of flash drying and dynamic calcination can not only improve product quality, improve operating conditions, no environmental pollution, continuous production of equipment, but also significantly reduce energy consumption. For enterprises with an annual output of 1000t light magnesium oxide, energy saving alone can save 1.25 million yuan annually.

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2023

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04

New calcination technology and quality control of light - fired magnesia

New calcination technology and quality control of light - fired magnesia

It is a common method to produce light-fired magnesium by calcining magnesite in shaft kiln, which is characterized by long calcining time, high calcining temperature and unstable product quality. The dynamic calcining process is to pulverize magnesite, spray the pulverized dry powder into the furnace at the top of the calcining kiln, instantly realize rapid heat transfer, and the finished calcining material is discharged from the bottom of the tower. The dynamic calcining process overcomes the phenomenon of underfiring and overfiring caused by the large block and long calcining time of magnesite in shaft kiln calcining process.

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2023

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04

Construction gypsum powder is produced by calcining sulfur gypsum in Sider calciner

Construction gypsum powder is produced by calcining sulfur gypsum in Sider calciner

Power plants, thermal power plants and large boilers use wet desulphurization to produce a large number of sulfur gypsum, desulfurized sulfur gypsum by filter filter, surface water content in 10 ~ 15%, particle size distribution of 10 ~ 100μm, calcium sulfate content is generally more than 90% ~ 95%.

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2023

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04

Technology and equipment for roasting molybdenum concentrate by rotary kiln

Technology and equipment for roasting molybdenum concentrate by rotary kiln

The technology of rotary-kiln roasting molybdenum concentrate has existed for many years in China, which is divided into external combustion and internal combustion. This article deals only with the latter. Early internal combustion rotary kiln roasting molybdenum concentrate technology has been applied in the former Soviet Union (1), a domestic factory uses this technology to produce ammonium molybdate, due to the simple operation technology and supporting equipment, the use effect is not ideal. So the technology is not widely used.

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2023

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04

Study on new technology of flash roasting of boron mineral powder

Study on new technology of flash roasting of boron mineral powder

In order to produce borate products with boromagite as raw material, iron concentrate is usually selected first, and then the tailings containing boron are processed into powder boron concentrate. In alkali process, boron ore must be roasted to improve the activity of boron trioxide. In this paper, a new process of flash roasting of low grade borite which combines pre-drying and activation roasting is proposed.

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2023

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04

Working principle of drying equipment

Working principle of drying equipment

The drying process needs to consume a lot of heat energy. In order to save energy, some materials with high moisture content, suspensions or solutions containing solid substances are generally first dehydrated by mechanical heating or evaporation, and then dried in a dryer to get dry solids. During the drying process, the transfer of heat and mass (wet component) should be completed at the same time to ensure that the wet component steam pressure (concentration) on the surface of the material is higher than that in the external space, and the temperature of the heat source is higher than that of the material.

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2023

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