Copper refining reverberatory furnace is a kind of equipment widely used in the copper smelting industry, mainly used to remove impurities in copper concentrate and improve the purity of copper. In copper refining reverberatory furnaces, the choice of refractory material is crucial as it directly affects the furnace's service life, production efficiency and product quality. Magnesia refractory bricks have become an ideal choice for copper refining reverberatory furnaces due to their excellent properties.
First, the performance characteristics of magnesia refractory bricks.
High melting point: The main component of magnesia refractory bricks is magnesium oxide (MGO), which has a melting point of up to 2800, which is much higher than other refractory materials, so it has good stability under high temperature conditions.
Strong slag resistance: magnesia refractory bricks have strong resistance to all kinds of slag, and are not easy to be eroded and worn, which is conducive to prolonging the service life of the furnace.
Low coefficient of thermal expansion: The low coefficient of thermal expansion of magnesia refractory bricks is conducive to reducing the thermal stress of the furnace and reducing the risk of furnace rupture.
Good thermal shock resistance: Magnesia refractory bricks have good thermal shock resistance, which can maintain stable performance in the case of rapid temperature changes, reducing furnace damage.
Good wear resistance: Magnesia refractory bricks have good wear resistance, can withstand high-speed flowing materials and high pressure at high temperatures, which is conducive to improving the production efficiency of the furnace.
2. Application of magnesia refractory bricks in copper refining reverberatory furnace.
Improve the service life of the furnace: due to the high melting point, strong slag resistance, low thermal expansion coefficient and other characteristics of magnesia refractory bricks, it has a long service life in the copper refining reverberatory furnace, which is conducive to reducing the maintenance cost and replacement frequency of the furnace.
Improve production efficiency: magnesia refractory bricks have good wear resistance and thermal shock resistance, and can withstand high-speed flowing materials and high pressure at high temperatures, which is conducive to improving the production efficiency of the furnace and shortening the production cycle.
Reduce energy consumption: magnesia refractory bricks have good thermal conductivity, which is conducive to improving the thermal efficiency of the furnace, reducing energy consumption and saving production costs.
Improve product quality: magnesia refractory bricks have a strong ability to remove impurities in copper concentrate, which is conducive to improving the purity of copper and improving the quality of products.
Reduce environmental pollution: magnesia refractory bricks are environmentally friendly and will not produce toxic and harmful substances, which is conducive to protecting the environment.
3. Application prospect of magnesia refractory bricks in copper refining reverberatory furnace.
With the increasing requirements of the copper smelting industry for environmental protection and energy saving, the application prospect of magnesia refractory bricks in copper refining reverberatory furnace is very broad. First of all, magnesia refractory bricks have excellent properties and can meet the various requirements of copper refining reverberatory furnacesSecondly, the ** of magnesia refractory bricks is relatively low, which can reduce the production cost;Finally, the production process of magnesia refractory bricks has matured, which is conducive to large-scale production and application.
In conclusion, magnesia refractory bricks make them an ideal choice for copper refining reverberatory furnaces due to their high melting point, strong slag resistance, low coefficient of thermal expansion, good thermal shock resistance and wear resistance. By using magnesia refractory bricks, the service life, production efficiency and product quality of the furnace can be improved, energy consumption and environmental pollution can be reduced, and the sustainable development of the copper smelting industry can be contributed.
The main problems of the reverberatory furnace copper smelting method are difficult to use and serious environmental pollution. Under the situation of continuous energy and strict environmental protection regulations, the limitations of the application of reverberatory furnace copper smelting method have become more and more obvious.
Application of magnesia refractory bricks in copper refining reverberatory furnace
furnace masonry and working door holes.
1.Top. In order to improve the life of the furnace top, the ordinary hanging furnace top structure is used, and the magnesia aluminum brick with a thickness of 300mm is selected. The furnace roof is an important part of the reverberatory furnace, and there are generally two forms, one is the vault and the other is the suspended ceiling. The vault is mostly made of silica bricks, which are built in a ring shape or divided into multiple sections. The ceiling is mostly built with magnesia bricks, with high temperature resistance, good slag chemical corrosion resistance, convenient local maintenance, and convenient for the widening of the furnace, which is beneficial to improving the production capacity of the furnace and prolonging the service life of the furnace roof.
2.Furnace walls. The inner wall of the furnace is made of magnesia brick, and its thickness is 350mmThe outer wall is made of clay bricks with a thickness of 23mm. The outside of the furnace wall is equipped with a 40mm thick cast iron cladding plate. The furnace wall is also built on the furnace foundation, and the inner layer of the furnace wall is made of good magnesia refractory bricks, and its main function is to prevent the high temperature erosion of the slag. The outer layer is made of ordinary refractory bricks, and the molten pool is thickened. At the end of the side wall, use magnesia brick or chrome magnesia brick to make 2 3 copper matte mouths, alternately. China's factories use the siphon type copper matte method to compare, the labor intensity is small, and the consumption of raw materials is saved. The slag outlet is located on the end wall or side wall near the end of the furnace, and is also made of magnesia bricks or chrome-magnesia bricks. Some factories also have cooling jackets on the outer walls of the furnace walls.
3.The brick pier overhead furnace bottom is adopted, the overhead height is 30mm, and the thickness of each layer of the furnace bottom (from top to bottom) is as follows.
magnesia aluminum brick reverse arch layer 380mm;
Magnesia tamping layer 60mm;
Clay brick layer 465mm;
Steel plate 15mm;
4.Door. There are two furnace doors. Consider using mechanical feeding from the furnace ting, and take the furnace door width of 1300mm and height of 80omm.
Slag picking. There are two slag scraping openings, both of which are located on the side wall opposite the furnace door, and their dimensions are 400m 00m. In order to facilitate the slag picking, the lower edge of the slag removal mouth is 132m lower than the lower edge of the feeding port, and magnesia bricks are built around it.
6.Put the copper mouth.
The hole type copper is used, and its position is located in the middle of the end wall at the end of the furnace, the hole size is Zhuo 25mm, and the copper brick group is made of magnesium aluminum brick.