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Method for producing active carbon by using cinder of brown coal

A technology for the production of activated carbon and lignite slag, which is applied in the chemical/physical/physical-chemical processes of energy application, and the removal of solid wastes. Low production cost, high product quality, overcoming the effect of cold centers

Inactive Publication Date: 2006-03-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the raw materials for the production of my country's activated carbon industry include high-quality coal, wood, fruit shells and cores, bamboo, rice husks, and crop straw, etc. In a few areas such as Shanxi and Ningxia, limited by quantity and transportation

Method used

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  • Method for producing active carbon by using cinder of brown coal
  • Method for producing active carbon by using cinder of brown coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The raw material is the slag of the Lurgi pressurized gasifier. Ingredients (percentage by weight): carbon 40.50%, hydrogen 0.73%, sulfur 0.51%, nitrogen 0.51%, oxygen 7.32%, ash 43.70%.

[0023] Pass the above raw materials through a vibrating classifier (1) to separate the large pieces of molten slag in the slag, use a Raymond mill (2) to crush the undersize to a particle size of less than 0.18mm, put the slag powder into the impregnator (3), and press The weight ratio of slag to caustic potash is 1:0.8, and caustic potash is prepared into an aqueous solution with a concentration of 30% by weight, and the slag is added to the prepared caustic potash solution, soaked for 4 hours, filtered with a vacuum filter (4), and the filtrate is returned for use , use the flue gas flow dryer (5) to dry the slag powder filtered out at 120 ° C, and the dried powder is separated in the separator (6) and the pulse bag filter (7), and put into a box-type microwave oven (8...

Embodiment 2

[0024] Embodiment 2: raw material is lignite slag, composition (weight percentage): carbon 45.6%, hydrogen 3.14%, nitrogen 1.21%, sulfur 1~2.4%, oxygen 14.15%, ash content 20~22.19%, moisture content 10.70% .

[0025] The above-mentioned raw materials are passed through a vibrating classifier (1) to separate the large pieces of slag in the slag, and the underscreen is crushed with a Raymond mill (2) until the particle size is less than 0.18mm. The ratio of slag to caustic potash is 1: 1.1, and the slag is added to the potassium hydroxide solution with a concentration of 40% by weight, soaked for 5-6 hours, filtered with a vacuum filter (4), and the filtrate is returned for use. Put the filter cake into a box-type high-temperature microwave oven (8), heat to 800°C-900°C for 2-3 minutes, and 900°C-1100°C for 5-10 minutes to obtain powdered activated carbon.

[0026] In above-mentioned embodiment, if the carbon content of raw material is low, then the specific surface area and i...

Embodiment 3

[0027] Embodiment 3: Irregular granular activated carbon and columnar activated carbon

[0028] After the powdered activated carbon obtained in the above two examples is mixed with 15-25% carboxymethyl cellulose and 10-25% calcium carbonate by weight, it is extruded and heated to 350- 450 ° C, heat preservation for 10-20 minutes, that is, columnar activated carbon is obtained.

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Abstract

Lignitous coal cinder (carbon content is more than 28 percent) is used as raw material to prepare active carbon. The characteristic is: poor quality coal cinder is row material, caustic potassium is used as active agent, control ratio is 0.8-1.2, immersion is made on that weight percentage density of caustic potassium is 25-40 percent, filter cake after being immersed in activated by microwave radiating, the radiating temp. is 800-1100 deg.C, activating time is 8-10 minutes, the product reaches or exceeds national coal active carbon standard.

Description

[0001] 1. Technical field: the present invention relates to a method for producing activated carbon from lignite slag, which belongs to the technical field of chemical preparation. 2. Background technology: [0002] Activated carbon is a carbonaceous material with developed pore structure, huge specific surface area and excellent adsorption performance. It has the ability to adsorb, catalyze, accumulate substances in its pores, maintain and react with carbon and its groups with other substances, and maintain physical and chemical stability. In addition, activated carbon is insoluble in water and most other solvents. In addition to reacting with strong oxidants such as oxygen, chlorine, and dichromate at high temperatures, it is extremely stable under many practical conditions. It can be used in a wide range of pH values ​​and various solvents, high temperature and high pressure. It can also improve or remove radioactive substances, and improve or remove short-term performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08B01J19/12B09B3/00
Inventor 宁平王红斌殷在飞彭金辉杨敏
Owner KUNMING UNIV OF SCI & TECH
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