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Desulphurizer for high-sulphur coal coke making and preparation method and applications

A desulfurizer, high-sulfur coal technology, applied in coke ovens, petroleum industry and other directions, can solve problems affecting the smooth operation of blast furnaces, etc., and achieve the effects of improving molten iron quality, good desulfurization effect, and reducing subsequent additions

Inactive Publication Date: 2009-03-18
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the desulfurizer it chooses contains ZnO and PbO. Since there is still Zn in the coking process of this method, Pb remains in the coke. During coking, Zn steam circulation and upper nodules will be formed under the reducing atmosphere in the blast furnace, while Pb is due to the specific gravity. Much larger than iron, it will form nodules in the lower part of the blast furnace, which will affect the smooth operation of the blast furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The main desulfurization agent and desulfurization auxiliary agent are mixed and then sent to a pulverizer to be pulverized to a size below 74 μm. Among them, the mass ratio of main desulfurizing agent: desulfurizing auxiliary agent is 100:20, and main desulfurizing agent: Fe 2 o 3 40wt%, Ni 2 o 3 60wt%, auxiliary desulfurizer: Co 2 o 3 .

[0033] Lingshi main coking coal with a sulfur content of 2.20%. The amount of desulfurizer added is 2% of the coal blending mass. The desulfurizer is prepared as a 20wt% solution, which is added to Lingshi main coking coal by spraying method and left to stand for 12 hours.

[0034] Coking was simulated under laboratory conditions, the temperature was programmed to rise to 1050°C over 4 hours, and the temperature was kept at 1050°C for 30 minutes. The sulfur content of the coke is 1.26, the coke yield is 75.1%, and the desulfurization rate is 56.99%.

Embodiment 2

[0036] The main desulfurization agent and desulfurization auxiliary agent are mixed and then sent to a pulverizer to be pulverized to a size below 74 μm. Among them, the mass ratio of main desulfurizing agent: desulfurizing auxiliary agent is 100:10, main desulfurizing agent: Fe 2 o 3 20wt%, Ni 2 o 3 80wt%, auxiliary desulfurizer: (NH 4 ) 6 Mo 7 o 24 50wt%Cr(CH 3 COO) 3 50wt%.

[0037] Jiexiu coking coal with a sulfur content of 1.61%. The amount of desulfurizing agent added is 2.5% of the coal blending mass. The desulfurizing agent is prepared as a 15wt% solution, sprayed, added to Jiexiu coking coal, and allowed to stand for 12 hours.

[0038] Coking was simulated under laboratory conditions, the temperature was programmed to rise to 1050°C over 4 hours, and the temperature was kept at 1050°C for 30 minutes. The sulfur content of the coke is 0.88, the coke yield is 69.3%, and the desulfurization rate is 62.12%.

Embodiment 3

[0040] Mix the main desulfurization agent with the desulfurization auxiliary agent and send it to a pulverizer to pulverize it to a size below 74 μm. Among them, the mass ratio of main desulfurizing agent: desulfurizing auxiliary agent is 100:30 Main desulfurizing agent: Fe 2 o 3 30wt%, Ni 2 o 3 70wt%, desulfurization aid: (NH 4 ) 6 Mo 7 o 24 20wt% Co 2 o 3 70wt%TiO 2 10 wt%.

[0041] Jiexiu coking coal with a sulfur content of 1.61%, the amount of desulfurizing agent added is 2.5% of the coal blending mass, the desulfurizing agent is directly mixed into Jiexiu coking coal, and mechanically stirred for 60 minutes.

[0042] Coking was simulated under laboratory conditions, the temperature was programmed to rise to 1050°C over 4 hours, and the temperature was kept at 1050°C for 30 minutes. The coke sulfur content is 0.92%, the coke yield is 70.1%, and the desulfurization rate is 59.94%.

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Abstract

The invention discloses a desulfurizing agent for coke making of high-sulfur coal, which comprises the following compositions: the mass ratio of a main desulfurizing agent to a desulfurizing auxiliary agent is between 100 to 5 and 30, wherein the main desulfurizing agent consists of Fe2O3 and Ni2O3, and the compositions with mass percentages are 10 to 90 percent of Fe2O3 and 10 to 90 percent of Ni2O3. The desulfurizing auxiliary agent is one or more of titanium dioxide, manganese dioxide, cobalt sesquioxide, chromium acetate or ammonium molybdate. The compositions are mixed, then are sent into a crushing machine, and are crushed to the size below 74mu to obtain the desulfurizing agent. The desulfurizing agent has the advantages of good desulfurization effect and no influence on the quality of molten iron.

Description

technical field [0001] The invention belongs to a desulfurizer, its preparation method and application, and in particular relates to a desulfurizer for high-sulfur coal coking, its preparation method and application. Background technique [0002] Sulfur is one of the harmful impurities in pig iron smelting, which reduces the quality of pig iron. Sulfur content greater than 0.07% in steelmaking pig iron is waste. When making iron, 11% of the sulfur brought into the furnace by the blast furnace charge comes from ore; 3.5% comes from limestone; 82.5% comes from coke, so coke is the main source of sulfur in the charge. The level of coke sulfur directly affects the production of blast furnace ironmaking. When the coke sulfur content is greater than 1.6%, the sulfur content increases by 0.1%, the coke usage increases by 1.8%, the limestone addition increases by 3.7%, and the ore addition increases by 0.3%. The output is reduced by 1.5-2.0%, and the sulfur content of metallurgical...

Claims

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Application Information

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IPC IPC(8): C10B57/06
Inventor 李文黄吉庆白宗庆李保庆尉迟唯白进
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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