Technology for preparing porous heat insulation plates by sintering iron tailings
A technology for thermal insulation board and preparation process, applied in thermal insulation, ceramic products, building components and other directions, can solve the problems of small specific gravity, restrict the development of the construction industry, etc., and achieve the effects of low cost, good economic and social benefits, and simple process
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[0020] Example 1
[0021] A preparation process of iron tailings sintered porous insulation board, characterized in that the preparation process is:
[0022] (1) The shale and iron tailings are sent to jaw crusher and hammer crusher respectively for crushing, the particle size after crushing is ≤25mm, and then sent to ball mill for grinding, and the ground shale and iron tailings are screened , measurement, the grinding fineness is between 20 and 80 μm;
[0023] (2) Add toughening agent, cosolvent and foaming agent to shale and iron tailings with a grinding fineness of 20-80 μm by mass percentage, and then mix them into a mixer. The mass percentage of the pre-added mixture is 3-15% of water into pellets, and the particle size of the raw pellets is 1-7 mm;
[0024] (3) After 24 hours of natural drying, the raw material balls in step (2) are evenly distributed in the molds cleaned and sprayed with the release agent through the distributor, and then the molds are suspended in t...
Example Embodiment
[0027] Example 2
[0028] The difference between this example and Example 1 is that the mass percentages of iron tailings, shale, toughening agent, cosolvent and foaming agent in step (2) are: iron tailings 15%, shale 40% , toughening agent 15%, cosolvent 20%, foaming agent 10%; the toughening agent is one of muscovite, silicon carbide and fluorite, and the cosolvent is borax, potassium feldspar, sodium feldspar A kind of stone and lead oxide, the foaming agent is a mixture of sodium carbonate powder, silicon carbide powder, iron powder and calcium phosphate powder, and the mass percentages are: sodium carbonate powder 10%, silicon carbide powder 30%, iron powder 30% %, calcium phosphate powder 30%. Other steps are the same as in Example 1.
Example Embodiment
[0029] Example 3
[0030] The difference between this example and Example 1 is that the mass percentages of iron tailings, shale, toughening agent, cosolvent and foaming agent in step (2) are: iron tailings 10%, shale 55% , toughening agent 10%, cosolvent 20%, foaming agent 5%; the toughening agent is one of muscovite, silicon carbide and fluorite, and the cosolvent is borax, potassium feldspar, sodium feldspar One of stone and lead oxide, the foaming agent is a mixture of sodium carbonate powder, silicon carbide powder, iron powder and calcium phosphate powder, and the mass percentages are: sodium carbonate powder 5%, silicon carbide powder 15%, iron powder 20% %, calcium phosphate powder 60%. Other steps are the same as in Example 1.
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