Coupling compound moulded coal binder and preparation method thereof

Abstract

The invention discloses a coupling compound moulded coal binder and a preparation method thereof. The coupling compound moulded coal binder is a mixture prepared by mixing bentonite, tackifier, sodium carbonate, kaolin and sodium humate; the mixture comprises the following components in parts by weight: 350-600 parts of the bentonite, 45-55 parts of the tackifier, 3-5 parts of the sodium carbonate, 280-320 parts of the kaolin and 100-125 parts of the sodium humate; the tackifier is prepared by smashing 10-15 parts by weight of polyacrylate, 5-10 parts by weight of acrylamide, 3-5 parts by weight of cellulose, 20-25 parts by weight of cassava stalk, 3-5 parts by weight of modified starch and 0.2-0.5 part by weight of cross-linking agent into 50-100 meshes, and mxing the smashed materials. The preparation method comprises the following steps: preparing the tackifier, stocking, pretreating parts of the components, mixing, stirring and the like. The moulded coal binder has favorable waterabsorbtion performance, the moisture of an extruded and shaped coal bar is quickly evaporated and is easy to dry, thus solving the problems of high raw coal moisture, difficult moulded coal production and low shaping rate in rainy days in the south of China.

Description

technical field [0001] The invention relates to a molded coal binder and a preparation method thereof, in particular to a composite type coal binder and a preparation method thereof. Background technique [0002] Briquette is a kind of secondary processed coal which is made by adding briquette binder to pulverized coal, which is used in gasifier and replaces anthracite lump coal. [0003] In order to make full use of the existing coal resources and reduce the environmental pollution caused by coal burning, countries all over the world attach great importance to the research and development of coal briquettes. At present, some major coal-producing countries in the world have regarded briquette technology as the main component of clean coal technology, and briquette binder is the key technology in the production of briquette coal, especially in the cold pressing process. High-quality briquette, hundreds of binders have been researched in countries all over the world. The sel...

AI Technical Summary

Problems solved by technology

[0005] Many domestic chemical fertilizer factories use organic matter such as humic acid as coal binder when they use pulverized coal to make coal (briquettes or coal sticks). Although this binder can meet the needs of coal production, humic acid The production process of quasi-binder is relatively complicated. When using it, alkali should be added, and it should be boiled to about 100°C, and then added to coal for retting for more than 8 hours before the briquette can be processed. The labor intensity of the workers is high, and the water absorption rate of the binder is low. The water content of the processed briquettes is relatively high, and it is difficult to produce and use in rainy days (especially in the south), and a large area of ​​coal yard is required, and the production process cannot be continuously produced due to the need for retting

Therefore, when using this briquette, an additional part of energy will be consumed

Publication No. CN101492624A described "environmental protection and energy-saving gasification briquette binder preparation method" prepared environmental protection and energy-saving gasification briquette binder is also a kind of water-based binder, also exists due to binder water absorption Low, the moisture content of processed briquettes is relatively high, and it is difficult to produce and use in rainy days (especially in the south)

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