Method for preparing decoloration coal activated carbon
A coal-based activated carbon and decolorization technology, which is applied in the field of preparation of decolorized coal-based activated carbon, can solve the problems of low caramel decolorization rate and environmental pollution, and achieve the effects of improving pore structure, good wear resistance and improving adsorption capacity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0029] Select Datong weakly caking coal with ash content of 2.4% by weight and volatile content of 32% by weight, Shaanxi weakly caking coal with ash content of 3.2% by weight and volatile content of 29% by weight, and fat coal, and crush the above-mentioned raw coal into seed coal of 6-9 mm , dried until the moisture content is less than 8%, and the ingredients are prepared according to the following ratio: Datong weakly caking coal 70kg, Shaanxi weakly caking coal 22kg, fat coal 8kg; crushed, passed through a 200-mesh sieve, and added 1kg of light magnesium oxide powder with an activity greater than 60 , mixed evenly; use the domestic WZ-500 dry roller briquetting machine (Hebei Xinji Jieda Equipment Co., Ltd.) to dry the powder into blocks; under anaerobic conditions, the temperature was raised to 300 at a heating rate of 3°C / min. °C pre-carbonization, followed by further carbonization at 450 °C for 300 minutes; two-stage activation, first activated at 800 °C for 2 hours in ...
Embodiment 2
[0033] Dosing according to the following proportions: 60kg of Datong weakly caking coal, 30kg of Shaanxi weakly caking coal, 10kg of fat coal; pulverize, pass through a 200-mesh sieve, add 2kg of light magnesium oxide powder with an activity greater than 60, and mix evenly; use domestic WZ-500 The dry roller briquetting machine dry-presses the powder into blocks; under anaerobic conditions, the temperature is raised to 300°C at a heating rate of 3°C / min for pre-carbonization, and then further carbonized at 450°C for 270 minutes; two-stage activation is adopted, first Activate at 800°C for 1 hour in a water vapor atmosphere, then activate at 900°C for 12 hours in a mixed atmosphere composed of 15% water vapor and 85% flue gas by volume; use 20% sulfuric acid aqueous solution at room temperature Soak the activated product and wash with water.
[0034] According to the same standards as in Example 1, various properties were tested, and the results are summarized in Table 1.
Embodiment 3
[0036] Dosing according to the following ratio: Datong weakly caking coal 72kg, Shaanxi weakly caking coal 18kg, fat coal 10kg; pulverize, pass through a 200-mesh sieve, add 3kg of light magnesium oxide powder with an activity greater than 60, and mix evenly; use domestic WZ-500 The dry roller briquetting machine dry-presses the powder into blocks; under anaerobic conditions, the temperature is raised to 300°C at a heating rate of 4°C / min for pre-carbonization, and then further carbonized at 500°C for 240 minutes; two-stage activation is adopted, first Activate at 800°C for 1 hour in a water vapor atmosphere, then activate at 800°C for 10 hours in a mixed atmosphere composed of 20% by volume water vapor and 80% by volume of flue gas; use 20% sulfuric acid aqueous solution at room temperature Soak the activated product and wash with water.
[0037] According to the same standards as in Example 1, various properties were tested, and the results are summarized in Table 1.
[003...
PUM
| Property | Measurement | Unit |
|---|---|---|
| iodine adsorption value | aaaaa | aaaaa |
| decolorization rate | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More