This kind of light burned magnesium ball is common in steel enterprises in Northeast China and coastal areas, because northeast China is rich in magnesite resources, coastal areas are rich in brucite, etc., especially in some chemical enterprises, the residue of chlorine gas prepared by electrolysis method is basically a kind of industrial garbage, and the preparation of magnesium ball is cheap and of good quality, and the ranking of magnesium ball is higher, which can reach more than 65% For other enterprises, the content of magnesium oxide in the middle of magnesium ball is 45% - 65%. With the intensification of blast furnace smelting, using titanium ore or titanium ball to protect the furnace has become one of the main means for many iron and steel plants to stabilize production and extend the service life of blast furnace. With the increase of demand, the price of titanium ore and titanium ball is rising, which has a great impact on the cost of blast furnace ironmaking. Pellet has the advantages of high grade, low gangue content, high strength, good reducibility, etc., which is the main method for blast furnace ironmaking One of the main raw materials.
In August 2010, a large belt roaster pelletizing production line with an annual output of 4 million tons was built for two 5500 m3 super large blast furnaces. Peru magnetite powder can be used for pelletizing production of Jingtang company. However, due to its low silicon and high alkali metal content, if other high silicon ore powder is not added, the reduction expansion index of pellet is abnormally high, which can not meet the requirements of large-scale high silicon iron ore The requirements of entering the furnace.
Price of light burned magnesium ball
In order to control the reduction expansion rate of pellet, the SiO2 content in the initial stage of pellet production is controlled above 3.5%, which affects the principle of further refining of blast furnace. In addition, dolomite and other magnesium containing fluxes should be added to ensure the fluidity of slag, but the drum strength and particle size decrease after adding too much magnesium containing solvent. Rotary kiln incinerator, also known as rotary kiln, is a slightly inclined steel hollow cylinder lined with firebrick. Most of the waste materials are heated by the gas generated in the combustion process and the heat transmitted by the kiln wall.
Solid waste from the front into the kiln for incineration, to rotate to achieve the purpose of mixing waste. When rotating, it is necessary to maintain an appropriate inclination to facilitate the solid waste to slide down. In addition, the waste liquid and waste gas can be sent from the kiln head or the secondary combustion chamber, and even the whole barrel of waste can be sent to the rotary kiln incinerator for combustion. Rotary kiln incineration technology is the most mainstream technology in the current hazardous waste incineration technology. It is the most widely used furnace type. It is a multi-purpose incinerator with strong adaptability, which can incinerate a variety of solid, semi-solid, liquid and gas wastes. Various types and shapes (particle, powder, block and barrel) of combustible wastes can be sent to rotary kiln for incineration. The incineration of hazardous waste in rotary kiln generally goes through several stages, such as drying, pyrolysis, combustion and burnout. After these stages, the harmful components in hazardous waste are fully decomposed and destroyed under the action of high temperature, forming high temperature flue gas and slag. These high temperature flue gas and slag will cause corrosive damage to the refractory materials built in the rotary kiln.