Preparation method of metallurgical biomass semi-coke

A manufacturing method and biomass technology, which are used in coke ovens, special forms of dry distillation, petroleum industry, etc., can solve the problems of high sulfur content, low strength and low cost in semi-coke, achieve strong chemical reactivity, reduce raw material costs, The effect of low sulfur content

Active Publication Date: 2013-12-18
ANGANG STEEL CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Its characteristic is to use low-quality lignite as raw material, put it into the reaction kettle, dry distillation at a temperature of 800 ° C and a time of 10 hours, and then carry out heavy medium gravity separation under the condition of a medium specific gravity of 1.25 to obtain ash content of 13% and volatile content of 12%. , 83% fixed carbon, lignite semi-coke with a cartridge calorific value of 25-30MJ / kg, but the semi-coke produced by this method has high sulfur content, low strength, and low-cost biomass charcoal has not been utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Using lignite, biomass charcoal powder and binder pitch as raw materials, lignite, biomass charcoal powder and binder particle size < 3mm are greater than 90%, and its mass fraction is: lignite 60%, biomass charcoal powder 35%, asphalt 5%. The components of biomass charcoal powder and lignite used are shown in Table 1 and Table 2.

[0020] Table 1 The mass percentage of biochar powder components

[0021] FC ad % A ad % V ad % M ad % S % 62.7 2.08 30.43 4.73 0.16

[0022] Table 2 The mass percentage of lignite components

[0023] M ad % A ad % V daf % S % 6.35 10.08 40.19 1.2

[0024] After the mixture is mixed evenly, it is pressed into shape with a double-roller ball press, and dry-distilled in a vertical internal heat furnace at 700°C for 12 hours to obtain biomass semi-coke for sintering or blowing.

[0025] The obtained biomass semi-coke can be tested, and its fixed carbon content is 80.3%, ash...

Embodiment 2

[0027] Using lignite, high volatile bituminous coal, biomass charcoal powder and binder tar residue as raw materials, the particle size <3mm is greater than 90%, and the mass fraction is: lignite 30%, high volatile bituminous coal 39%, biomass charcoal powder 25% %, tar residue 6%. The composition of the biomass carbon powder used is the same as that in Table 1; the composition of lignite and bituminous coal is shown in Table 3.

[0028] Table 3 Mass percentage of lignite and high volatile bituminous coal components

[0029] M ad % A ad % V daf % S % lignite 6.35 10.1 40.19 1.2 High volatile bituminous coal 5.13 8.62 38.42 0.95

[0030] After the mixture is mixed evenly, it is pressed into shape with a double-roller ball press, and dry-distilled in a vertical internal heat furnace at 800°C for 15 hours to obtain semi-coke for sintering or blowing.

[0031] The obtained biomass semi-coke can be tested, and its fixed carbon conte...

Embodiment 3

[0033] The mixture is composed of lignite, high-volatile bituminous coal, lean coal, biomass carbon powder and binder water glass, and its particle size is less than 3mm. More than 90%, the mass fraction is: lignite 28%, high-volatile bituminous coal 20%, lean Coal 15%, biomass charcoal powder 32%, water glass 5%. The composition of the biomass carbon powder used is the same as in Table 1; the composition of lignite, high volatile bituminous coal and lean coal is shown in Table 4.

[0034] Table 4 Mass percentage of lignite, high volatile bituminous coal and lean coal

[0035] M ad A ad V daf S lignite 6.35 10.1 40.19 1.2 High volatile bituminous coal 5.13 8.62 38.42 0.95 lean coal 5.68 14.8 13 0.68

[0036] After the mixture is mixed evenly, it is pressed into shape with a double-roller ball press, and dry-distilled in a vertical internal heat furnace at 750°C for 14 hours to obtain semi-coke for sintering or blowing.

[0037]...

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Abstract

The invention provides a preparation method of metallurgical biomass semi-coke. The preparation method comprises the following steps of: uniformly mixing 55-70% of inferior coal, 25-40% of biomass charcoal powder and 4-8% of binding agent, pressing for molding the uniform mixture, and carrying out destructive distillation at 650-800 DEG C for 10-15 hours to obtain the semi-coke for sintering and blast furnace jetting. The biomass semi-coke provided by the invention has the advantages of both the biomass charcoal and the semi-coke, and is strong in chemical reactivity, low in sulfur content, capable of reducing the emission of the greenhouse gas CO2 and the harmful gas SO2, wide in carbon raw materials, and low in process energy consumption; the heat value of the produced biomass semi-coke is high and can reach 28.8MJ/Kg on average; therefore, the cost of the raw materials can be reduced, the pollution caused by the random discard or combustion of the biomass can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of raw materials for ironmaking, and in particular relates to a method for manufacturing biomass semi-coke for metallurgy. Background technique [0002] Biomass charcoal is solid charcoal left by putting bark, branches, fruit shells, sawdust, etc. into a pyrolysis furnace for thermal decomposition. Its ash content is 1% to 4%, volatile matter is 12% to 20%, and it contains a lot of sulfur. Low about 0.1% to 0.2%. Biochar has a well-developed pore structure, high specific surface area and abundant surface functional groups, which make biochar have broad application prospects in the fields of energy and environment. The calorific value of biochar ranges from 5000 kJ / kg to 20000 kJ / kg (wood), while coal can reach more than 30000 kJ / kg. Biomass charcoal has lower heat generation than coal, and even lower than coke (33650kJ / kg), and its density, crushing strength and wear resistance are lower, so biochar used a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/08C10B57/04
Inventor 张辉周明顺翟立委刘杰徐礼兵童晓宇
Owner ANGANG STEEL CO LTD
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