Pulverized coal forming method for solving long-distance transportation problem of low-metamorphic bituminous coal
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A technology of long-distance transportation and molding method, which is applied in the field of railway transportation to achieve the effect of solving long-distance transportation, high molding rate and good quality
Inactive Publication Date: 2022-05-27
DALIAN UNIV OF TECH
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Problems solved by technology
[0005] The purpose of the present invention is to propose a pulverized coal molding method to solve the problem of long-
Method used
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Embodiment 1
[0021] like figure 1 As shown, a pulverized coal molding method to solve the problem of long-distance transportation of low metamorphic bituminous coal includes the following steps:
[0022] Step 1, crushing, screening and drying the low metamorphic non-caking coal;
[0023] Step 2: Take 85wt% Fugu non-sticky coal and 6wt% hydroxypropyl methylcellulose and mix them in a beaker according to weight percentage, add 9wt% water after mixing evenly, fully stir and mix, pack Put it into the mold and place it under the pressure of 30MPa for cold pressing, and press for 5 minutes to get cylindrical briquettes Each briquette weighs about 12g.
Embodiment 2
[0025] like figure 1 As shown, a pulverized coal molding method to solve the problem of long-distance transportation of low metamorphic bituminous coal includes the following steps:
[0026] Step 1, crushing, screening and drying the low metamorphic non-caking coal;
[0027] Step 2: Take 85wt% Fugu non-sticky coal and 6wt% hydroxypropyl methylcellulose and mix them in a beaker according to weight percentage, add 9wt% water after mixing evenly, fully stir and mix, pack After entering the mold, place it under a pressure of 40MPa and cold press it to form a cylindrical shaped coal after pressing for 10 minutes Each briquette weighs about 12g.
Embodiment 3
[0029] like figure 1 As shown, a pulverized coal molding method to solve the problem of long-distance transportation of low metamorphic bituminous coal includes the following steps:
[0030] Step 1, crushing, screening and drying the low metamorphic non-caking coal;
[0031] Step 2: Take 88wt% Fugu non-sticky coal and 3wt% hydroxypropyl methylcellulose and mix them in a beaker by weight percentage, add 9wt% water after mixing evenly, fully stir and mix, pack After entering the mold, place it under a pressure of 30MPa and cold press it to form a cylindrical shaped coal after pressing for 10 minutes Each briquette weighs about 12g.
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Abstract
The invention belongs to the technical field of railway transportation, and discloses a pulverized coal forming method for solving the problem of long-distance transportation of low-metamorphic bituminous coal, which comprises the following steps: firstly, crushing, screening and drying low-metamorphic non-caking coal with the particle size of greater than 3mm; the method comprises the following steps: uniformly mixing low-metamorphic non-caking coal, hydroxypropyl methyl cellulose and water according to a certain ratio, and carrying out pressure forming in a mold to obtain a briquette product. According to the low-metamorphic non-caking coal forming method, the problem that low-metamorphic pulverized coal is scattered and raised in the long-distance transportation, loading and unloading process can be thoroughly solved, meanwhile, the problems that in the using process of a dust suppressant, the number of additives is large, and the additive amount is large are solved, the obtained non-caking coal briquette product has the advantages of being good in quality and high in mechanical strength, and the low-metamorphic non-caking coal forming method is suitable for industrial production. The process has a wide application prospect in long-distance transportation of pulverized coal.
Description
technical field [0001] The invention belongs to the technical field of railway transportation, and in particular relates to a pulverized coal molding method for solving the problem of long-distance transportation of low metamorphic bituminous coal. Background technique [0002] The endowment of my country's energy resources is characterized by "rich coal, lack of oil, and little gas". The low-rank coal reserves of coal resources account for more than 55% of the total coal resources in my country, mainly distributed in Shanxi, Shaanxi, Mongolia, Xinjiang and other northwest regions. The central, eastern and southern regions are still the main coal consumption areas. At present, my country has formed a transportation pattern in which coal is transported from west to east and from north to south. Long-distance transportation has become the norm and railway transportation of coal is the main mode of transportation. [0003] With the application of mechanized mining technology, t...
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