High thermal stability synthetic ammonia gasification moulded coal and preparation method thereof

Abstract

The invention provides a high thermal stability synthetic ammonia gasification moulded coal, which is made from the following components by weight: 76.0-84.7 of anthracite powder, 0.3-1.0 of added modified starch, 4-10 of fat coal powder processed by low temperature carbonization and 11-13 of water. Due to the added modified starch, the synthetic ammonia gasification moulded coal effectively enhances the cold strength of moulded coal and effectively improves the thermal stability of moulded coal with the added fat coal processed by low temperature carbonization.

Description

technical field [0001] The invention relates to a gas-making briquette, in particular to a synthetic ammonia gas-making briquette and a preparation method thereof. Background technique [0002] With the continuous development of coal mechanical mining, the output of lump coal is getting lower and lower, especially the high-quality anthracite lumps used for fertilizer plant gas production are in short supply and the price is relatively high. At present, in order to save production costs, chemical fertilizer factories generally use pulverized coal to make briquettes as raw materials for ammonia synthesis. Most of the additives use sodium humate solution, which is mixed with anthracite powder, stirred, retting, and then made into briquettes or coal sticks under high pressure. Put it into the oven after drying. [0003] Although the briquettes produced by the above methods have a certain cold strength, the thermal strength is generally low. The thermal stability of the briquett...

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Problems solved by technology

[0003] Although the briquettes produced by the above methods have a certain cold strength, the thermal strength is generally low. The thermal stability of the briquettes refers to the degree of stability of the briquettes to heat during the high-temperature combustion process or gasification process, that is, the briquettes are Under the action of high temperature, the properties of the original particle size are maintained, and the poor thermal stability will easily cause the furnace to collapse, which will affect the gas production rate and reduce the gas production.