An additive for improving high-speed railway Zhundong coal slagging characteristics and its application method

Abstract

The invention discloses an additive for improving the slagging characteristics of high-speed Zhundong coal and an application method thereof. The additive is composed of aluminum ash, dolomite and magnesium oxide, and the mass percentages are: aluminum ash 15%-65%, magnesium oxide 25%- 50%, the balance is dolomite. The application method of the additive in the present invention is to prepare mixed coal according to the mass ratio of the additive and the high-speed Zhundong coal (3-8): 100, and the mass percentage of each component in the high-speed Zhundong coal is: aluminum ash 1%-6% , magnesium oxide 1%-5%, dolomite 1%-5%. The implementation steps of the application method are: firstly determine the quality of each component of the additive according to the quality of the high-speed railway Zhundong, then crush and mix the additive and the high-speed railway Zhundong coal in a coal mill or flow and mix in a primary air duct, and finally send the additive. Burn into the furnace. The additive is composed of natural minerals and industrial wastes, and has simple components and low price. The proportion of high-speed railway Zhundong coal blending.

Description

Technical field

[0001] The invention belongs to the technical field of improving the slagging characteristics of Zhundong coal, and particularly relates to an additive for improving the slagging characteristics of high-speed railway Zhundong coal and an application method thereof.Background technique

[0002] With the gradual improvement of my country's economic situation, national electricity demand has continued to pick up since 2016, reaching 6791.24 billion kWh / year in 2018 (a year-on-year increase of 6.8%). China’s energy power structure is dominated by thermal power generation. In 2018, thermal power generation accounted for 73.32% of the country’s total power generation (a year-on-year increase of 6%), of which coal-fired power generation accounted for more than 90% of the total thermal power generation, indicating that coal is in China's power generation industry still dominates. In 2005, my country’s Xinjiang region discovered the largest monolithic coalfield so far, the Zhundong...

Examples

Embodiment 1

[0041]The additive components and the mass percentages of each component are shown in Table 1:

[0042]Table 1, Example 1 Additive components and mass percentage

[0043] Component Aluminum gray Magnesium Oxide dolomite unit ％％％ Compared with high-speed railway Zhundong coal quality 132 % Of additive mass15-205030-35

[0044]The mass ratio of additives and high-speed Zhundong coal is 6:100, the average particle size of aluminum ash is less than 200μm, the average particle size of magnesium oxide is less than 20μm, and the average particle size of dolomite is less than 75μm. The additive of Example 1 can increase the softening temperature of high-speed railway Zhundong coal ash by 60° C. or more.

Embodiment 2

[0046]The additive components and the mass percentages of each component are shown in Table 2:

[0047]Table 2, Example 2 Additive components and mass percentage

[0048] Component Aluminum gray Magnesium Oxide dolomite unit ％％％ Compared with high-speed railway Zhundong coal quality 211 % Of additive mass502525

[0049]The mass ratio of additives and high-speed Zhundong coal is 4:100, the average particle size of aluminum ash is less than 200μm, the average particle size of magnesium oxide is less than 20μm, and the average particle size of dolomite is less than 150μm. The additive of Example 2 can increase the softening temperature of high-speed railway Zhundong coal ash by 80° C. and above.

Embodiment 3

[0051]The additive components and the mass percentages of each component are shown in Table 3:

[0052]Table 3, Example 3 Additive components and mass percentage

[0053]

[0054]

[0055]The mass ratio of additives and high-speed Zhundong coal is 8:100, the average particle size of aluminum ash is less than 150μm, the average particle size of magnesium oxide is less than 50μm, and the average particle size of dolomite is less than 75μm. The additive of Example 3 can increase the softening temperature of high-speed railway Zhundong coal ash by 80° C. and above.

Technical field

[0001] The invention belongs to the technical field of improving the slagging characteristics of Zhundong coal, and particularly relates to an additive for improving the slagging characteristics of high-speed railway Zhundong coal and an application method thereof.Background technique

[0002] With the gradual improvement of my country's economic situation, national electricity demand has continued to pick up since 2016, reaching 6791.24 billion kWh / year in 2018 (a year-on-year increase of 6.8%). China’s energy power structure is dominated by thermal power generation. In 2018, thermal power generation accounted for 73.32% of the country’s total power generation (a year-on-year increase of 6%), of which coal-fired power generation accounted for more than 90% of the total thermal power generation, indicating that coal is in China's power generation industry still dominates. In 2005, my country’s Xinjiang region discovered the largest monolithic coalfield so far, the Zhundong...

Examples

Embodiment 1

[0041]The additive components and the mass percentages of each component are shown in Table 1:

[0042]Table 1, Example 1 Additive components and mass percentage

[0043] Component Aluminum gray Magnesium Oxide dolomite unit ％％％ Compared with high-speed railway Zhundong coal quality 132 % Of additive mass15-205030-35

[0044]The mass ratio of additives and high-speed Zhundong coal is 6:100, the average particle size of aluminum ash is less than 200μm, the average particle size of magnesium oxide is less than 20μm, and the average particle size of dolomite is less than 75μm. The additive of Example 1 can increase the softening temperature of high-speed railway Zhundong coal ash by 60° C. or more.

Embodiment 2

[0046]The additive components and the mass percentages of each component are shown in Table 2:

[0047]Table 2, Example 2 Additive components and mass percentage

[0048] Component Aluminum gray Magnesium Oxide dolomite unit ％％％ Compared with high-speed railway Zhundong coal quality 211 % Of additive mass502525

[0049]The mass ratio of additives and high-speed Zhundong coal is 4:100, the average particle size of aluminum ash is less than 200μm, the average particle size of magnesium oxide is less than 20μm, and the average particle size of dolomite is less than 150μm. The additive of Example 2 can increase the softening temperature of high-speed railway Zhundong coal ash by 80° C. and above.

Embodiment 3

[0051]The additive components and the mass percentages of each component are shown in Table 3:

[0052]Table 3, Example 3 Additive components and mass percentage

[0053]

[0054]

[0055]The mass ratio of additives and high-speed Zhundong coal is 8:100, the average particle size of aluminum ash is less than 150μm, the average particle size of magnesium oxide is less than 50μm, and the average particle size of dolomite is less than 75μm. The additive of Example 3 can increase the softening temperature of high-speed railway Zhundong coal ash by 80° C. and above.

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