Method for producing aluminum oxide by sintering calcium carbide mud, fly ash and coal gangue
A technology of coal gangue and calcium carbide mud, applied in the field of alumina preparation, can solve problems such as strict equipment requirements, high sintering temperature, pollution, etc., and achieve the effects of avoiding high temperature and high pressure desiliconization, shortening extraction time, and reducing production costs
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[0037] Example 1
[0038] A method for producing alumina with calcium carbide mud fly ash and coal gangue sintering method, comprising the following steps in sequence:
[0039] The chemical composition of raw material 1 fly ash is as follows:
[0040]
[0041] The chemical composition of raw material 1 coal gangue is as follows:
[0042]
[0043]Raw meal configuration: Weigh 100 parts of fly ash, 30 parts of coal gangue, 100 parts of calcium carbide mud, and 100 parts of soda ash, pulverize to 160 mesh, and carry out ingredients according to the solid-liquid ratio of 5:1, stir evenly, and obtain raw meal;
[0044] The raw meal was calcined at 850°C for 1 hour, cooled to room temperature, crushed and ground to 80 mesh to obtain clinker;
[0045] The prepared clinker was dissolved in water, stirred and dissolved at 85°C for 30 minutes, and the dissolution rate of alumina was calculated to be 90%;
[0046] The filtered red mud is washed, filtered again, and the filtered ...
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[0050] Example 2
[0051] The chemical composition of raw material 2 fly ash is as follows:
[0052]
[0053] The chemical composition of raw material 2 coal gangue is as follows:
[0054]
[0055] A method for producing alumina with calcium carbide mud fly ash and coal gangue sintering method, comprising the following steps in sequence:
[0056] Raw meal configuration: Weigh 110 parts of fly ash, 35 parts of coal gangue, 105 parts of calcium carbide mud, and 105 parts of soda ash, pulverize to 160 mesh, and make ingredients according to the solid-liquid ratio of 5:1, stir evenly, and prepare raw meal;
[0057] The raw meal was calcined at 880°C for 1 hour, cooled to room temperature, and crushed and ground to 80 mesh to obtain clinker;
[0058] The prepared clinker was dissolved in water, stirred and dissolved at 85°C for 30 minutes, and the dissolution rate of alumina was calculated to be 92%;
[0059] The filtered red mud is washed, filtered again, and the filtered...
Example Embodiment
[0063] Example 3
[0064] The chemical composition of raw material 3 fly ash is as follows:
[0065]
[0066] The chemical composition of raw material 2 coal gangue is as follows:
[0067]
[0068] A method for producing alumina by sintering calcium carbide mud fly ash and coal gangue, comprising the following steps in sequence:
[0069] For raw meal configuration, weigh 108 parts of fly ash, 33 parts of coal gangue, 110 parts of calcium carbide mud, and 106 parts of soda ash, pulverize to 160 mesh, carry out ingredients according to the solid-liquid ratio of 5:1, stir evenly, and prepare raw meal;
[0070] The raw meal was calcined at 950°C for 1 hour, cooled to room temperature, and crushed and ground to 80 mesh to obtain clinker;
[0071] The prepared clinker was dissolved in water, stirred and dissolved at 85°C for 30 minutes, and the dissolution rate of alumina was calculated to be 89%;
[0072] The filtered red mud is washed, filtered again, and the filtered lot...
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