The difference between fused magnesia and large crystalline fused magnesia

The fused magnesia is mainly prepared by melting 47% or more of magnesite ore in an electric arc furnace. The chemical index of fused magnesia can be divided into 6 major items; 1. Magnesium oxide content; 2. Silica content; 3. Ferric oxide content; 4. Aluminum oxide content; 5. Caustic soda; The fused magnesia product has high purity, large crystal grains, compact structure, strong slag resistance, good thermal shock resistance, and is an excellent high-temperature electrical insulating material. It is also a high-grade magnesia brick, magnesia carbon brick and no. An important raw material for shaping refractories.

The main features of fused magnesia products: fused magnesia products are characterized by complete structure, compact structure, high melting point (up to 2800 ° C), stable chemical properties, high compressive strength, strong insulating properties, erosion resistance, corrosion resistance, Metallurgy, building materials, light industry, furnace lining and bulk materials are also important refractory materials in the steel, cement, glass, non-ferrous metal smelting and other industries.

The main use of fused magnesia: fused magnesia can be mainly used for auxiliary refractory materials such as spray materials, ramming materials, and special refractory bricks such as flow steel bricks, magnesia bricks, magnesia chrome bricks, etc., and also in vacuum and non-vacuum. The induction furnace and the electric arc furnace are made of refractory lining, which is an ideal raw material for making magnesia crucible, furnace and various high temperature casings.

Large-crystal fused magnesia production process: Large-crystal fused magnesia is mainly obtained by using 91%-92% magnesium oxide and 0mm-3mm magnesium oxide particles, which are melted in an electric arc furnace. The product has high purity, large crystal grain, compact structure, strong slag resistance and good thermal shock resistance. It is an excellent high-temperature electrical insulating material and is also important for making high-grade magnesia bricks, magnesia carbon bricks and amorphous refractories. raw material. Widely used in metallurgy, chemical, national defense, scientific research, aerospace, household appliances and other components.

Large crystalline fused magnesia product characteristics: high purity, large crystal melting, high knot, compact structure; good thermal shock resistance; good high temperature flexural strength; good slag resistance and corrosion resistance; High performance and high insulation.

Large crystal fused magnesia product use: Large crystal fused magnesia is used as a lining refractory material for steelmaking furnaces. It is a high-quality alkaline refractory raw material for the manufacture of refractory bricks and amorphous refractories. It can also be used as a filler. Thermocouples and thermal insulation materials (home appliances, etc.); can also be used for ceramic raw materials and sintering auxiliaries as well as metallurgy, building materials, chemicals, national defense, medical equipment, etc.

The Dome Fixed Focus Camera/ Dome Fixed Focus Camera Indoor/ Dome Fixed Focus Webcam / Fixed Focus Dome Webcam Night Vision/ IR Fixed Focus dome camera/ Fixed Focus Dome Camera 360°belongs to both the Fixed Focus Camera and the Dome Camera. So what is the Dome Camera?

The Dome Camera, as the name implies, has the dome shape, and this dome shape is exactly the origin of this name "Dome camera". The Dome Camera is very suitable to be used in the office places and places with the high-grade decoration because of its small size and beautiful appearance. The Dome Camera is composed of a camera, an automatic iris manual zoom lens, a dome cover with the excellent sealing performance, and a precise camera mounting bracket; and its biggest feature is its exquisite design, beautiful appearance and easy installation. 

With the security surveillance cameras applied extensively and deeply,  in the pursuit of the convenient installation and debugging, and the full coordination with the the building environment(both beautiful and concealed), the Dome Camera is developed. Now the Dome Camera has been widely used in the TV surveillance projects.

Although the Dome Camera's composition has many similarities with the Bullet Camera, for example, both are fixed cameras, the Dome Camera has the delicate protective cover and mounting bracket, while the Bullet Camera needs to be equipped with a protective cover. The Dome Camera has a zoom lens with the small zoom range and the lens is not easy to replace; while the zoom range of the Bullet Camera depends on the selected lens, from several times to several times, and the lens replacement is very convenient. Dome cameras are mostly used in indoor small-scale monitoring occasions, such as the entrances and exits, passages, elevator cars, etc. of important parts; while the scope of Bullet Camera's application is very wide, according to the selection of different lenses, long-distance or wide-angle monitoring can be realized, and the application occasions are much wider than that of the Dome Camera.

With surveillance applications wider and wider; due to the convenience of installation and debugging, and the concealment of the surveillance, the dome camera has been widely applied to the indoor surveillance, such as the places with the ceiling and the rarely changing light. The Dome Camera technology also changes very quickly. For example, firstly, the camera shooting function of the Dome Camera is not different from the high-performance Bullet Camera, and the Dome Camera  is miniaturized; Secondly, the lens of the Dome Camera is also automatic iris + manual zoom, and the zoom range gradually increases; Thirdly, the overall sealing performance of the Dome Camera is better, especially the lower dome, it is made thin and uniform, with better light transmittance and less light loss; Last but not the least, the mechanical design of the mounting bracket is more exquisite, which makes the adjustment of the camera position very convenient, and the three-dimensional adjustable universal joint bracket has appeared.