Preparation of Light Magnesium Oxide from Serpentine Ore

Serpentine is an RSR type layered silicate mineral composed of silicon oxygen tetrahedron and hydrogen magnesium octahedron. It is named after its snake skin like pattern.

Serpentine is usually discarded as a solid waste during asbestos mining. The amount of asbestos mined in China every year has reached 200000 tons, and the cotton content of the ore in the asbestos mine is about 8%, of which more than 90% - that is, millions of tons of serpentine are asbestos tailings, and the utilization rate of tailings only accounts for 2% of the emissions, so the discharge of serpentine as a waste is amazing. This not only wastes natural resources, but also has a certain impact on the local environment.

Serpentine is a kind of mineral resources with potential advantages, and its comprehensive development and utilization value has attracted people's attention. The main available elements are silicon and magnesium. China is rich in serpentine resources. Only in southern Anhui Province, the proven reserves are about 1.02 billion tons, ranking first in the country. The serpentine here contains about 8% MgO3. In addition to SiO ✪, it also contains oxides such as CaO, Fe ∈ O ｜, Al ∈ O ｜ and so on.

Light magnesium oxide is a widely used chemical raw material, which is widely used in rubber, plastic, artificial fiber, paint, enamel, refractory, etc. The demand for magnesium oxide in the rubber industry alone in Southeast Asia is great. Water glass is an important chemical raw material. The existing production method mainly uses quartz sand and soda ash as raw materials and is made by melting reaction at 1400~1500 ℃.

Performance characteristics:

1. The burning materials are uniform and sufficient to produce active magnesium oxide.

2. The equipment system has no pollution and meets the environmental requirements.

3. Compared with shaft kiln, energy consumption can be saved by 20~30%

4. Convenient operation and high degree of automation