CN104774654A - Application method of blast-furnace gas antichlor - Google Patents

Application method of blast-furnace gas antichlor Download PDF

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Publication number
CN104774654A
CN104774654A CN201510118754.1A CN201510118754A CN104774654A CN 104774654 A CN104774654 A CN 104774654A CN 201510118754 A CN201510118754 A CN 201510118754A CN 104774654 A CN104774654 A CN 104774654A
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dechlorinating agent
wingdale
furnace gas
blast furnace
sodium carbonate
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CN104774654B (en
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宋春燕
胡桂渊
高爱民
胡宾生
贵永亮
张波
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Hebei Tianzhu Iron And Steel Group Co Ltd
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Hebei United University
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Priority to JP2015124061A priority patent/JP6073978B2/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/002—Removal of contaminants
    • C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/20—Purifying combustible gases containing carbon monoxide by treating with solids; Regenerating spent purifying masses
    • C10K1/205—Methods and apparatus for treating the purifying masses without their regeneration
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Blast Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

The invention provides an application method of a blast-furnace gas antichlor. The antichlor is mainly composed of cheap industrial limestone, commercial sodium carbonate, and potassium hydroxide. The formula and preparation technology of the antichlor are optimized. A disc balling machine is used to produce the antichlor balls. A fixed bed reactor is used to remove the HCl gas. If the HCl in blast-furnace gas reaches 1 ppm after the reactions, the antichlor is disabled. The provided application method of blast-furnace gas antichlor is developed according to the characteristics of a blast furnace iron smelting technology and equipment thereof.

Description

A kind of using method of blast furnace gas dechlorinating agent
Technical field
The present invention relates to complicated ingredient and high temperature coal gas purification technical field, particularly a kind of using method of blast furnace gas dechlorinating agent.
Background technology
First blast furnace gas in blast furnace gas dry dusting technology carries out one-time dedusting through gravitational dust collection, then enters sack cleaner and carries out final dusting, and the later purified gas of dedusting enters TRT unit turbine decompression acting, and drive electrical generators generates electricity.Blast furnace gas dry dusting purification techniques has very large advantage relative to the washing tower in past, Venturi meter and two civilian Venturi meter wet dedusting, purification efficiency is high, water loss significantly reduces, the generated energy of TRT can increase substantially by what is more important, add the Collection and utilization of energy, reduce the energy consumption of ton iron.
Along with the development of China's Iron And Steel Industry, the especially increase of production cost, many cheap iron ores receive to be paid close attention to and progressively brings into use.The content of the especially harmful element of the trace element in cheap iron ore is higher, and the content of Cl element particularly brought in blast furnace increases, and makes the HCl content in blast furnace gas also in rising trend, exacerbates the corrosion of pipeline and equipment undoubtedly.In recent years, the HCl that the hardware such as blast furnace gas pipeline, TRT blade of each iron and steel enterprise all receives in various degree corrodes.Therefore, study the HCl removed in blast furnace gas under dry method dust condition and become one of field of metallurgy hot issue urgently to be resolved hurrily.
Although done in fields such as integrated coal gasification combined cycle (IGCC), coal gasified fuel battery (MCFC), petrochemical complex and waste incinerations the large quantity research removing HCl, such as utilize bed technology, dechlorinating agent used mostly is alkaline dechlorinating agent, is mainly divided into lime base (limestone, white lime and unslaked lime) and sodium base (soda powder, sodium bicarbonate).But flow velocity is fast, flow is large, pressure is high, CO because blast furnace gas has 2with water vapor and all more high exclusive feature of stove particle concentration, these techniques and technology are not all suitable for blast furnace gas.
The application uses for reference on the basis of above-mentioned research, for the feature of blast furnace gas and the processing condition of iron manufacturing process and device layout, develops a kind of using method of cheap, blast furnace gas dechlorinating agent that dechlorination effect is good.
Summary of the invention
Object of the present invention is exactly be to provide a kind of using method that can reach the dechlorinating agent of good dechlorination effect.
For achieving the above object, the technical solution used in the present invention is:
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide as raw material for the preparation of dechlorinating agent, wherein the granularity of Wingdale will at below 5mm, and the granularity of sodium carbonate and potassium hydroxide will at below 3mm;
Two), first industrial Wingdale former state is soaked 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is at 10%-15%, and then the Wingdale after immersion is placed in the hot conditions calcining 1-2h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=30-70: 70-30 (weight percent) prepares burden, then premix is carried out, mixing time is 10-15min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, and the finished product bead of screening 3-10mm, dries or oven drying at low temperature obtains dechlorinating agent under 100 DEG C of conditions finished product naturally.
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas containing HCl gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
To above-mentioned steps one) to step 4) obtained by product carry out the mensuration of time of break-through and a breakthrough chlorine content, the product optimized has longer time of break-through and higher breakthrough chlorine content, excellent performance.
Advantage of the present invention have employed cheap starting material, have passed through simple preparation process, finally proposes a kind of novel dechlorination sorbent removes HCl gas using method for blast furnace gas.
Embodiment
Below, by concrete experiment embodiment, the present invention is described in detail.
Experiment embodiment 1
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide to prepare dechlorinating agent as raw material, wherein the granularity of Wingdale is less than 5mm, and the granularity of sodium carbonate and potassium hydroxide is less than 3mm;
Two), by industrial Wingdale former state soak 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is 10%, and then the Wingdale after immersion is placed in the hot conditions calcining 1h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=30: 70 (weight percents) are prepared burden, then premix is carried out, mixing time is 10min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, the finished product bead of screening 3-10mm, and under 100 DEG C of conditions, oven drying at low temperature obtains dechlorinating agent product;
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas containing HCl gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
Experiment embodiment 2
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide to prepare dechlorinating agent as raw material, wherein the granularity of Wingdale is less than 5mm, and the granularity of sodium carbonate and potassium hydroxide is less than 3mm;
Two), by industrial Wingdale former state soak 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is 15%, and then the Wingdale after immersion is placed in the hot conditions calcining 1h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=30: 70 (weight percents) are prepared burden, then premix is carried out, mixing time is 10min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, the finished product bead of screening 3-10mm, and under 100 DEG C of conditions, oven drying at low temperature obtains dechlorinating agent product;
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas containing HCl gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
Experiment embodiment 3
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide to prepare dechlorinating agent as raw material, wherein the granularity of Wingdale is less than 5mm, and the granularity of sodium carbonate and potassium hydroxide is less than 3mm;
Two), by industrial Wingdale former state soak 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is 15%, and then the Wingdale after immersion is placed in the hot conditions calcining 2h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=30: 70 (weight percents) are prepared burden, then premix is carried out, mixing time is 10min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, the finished product bead of screening 3-10mm, and under 100 DEG C of conditions, oven drying at low temperature obtains dechlorinating agent product;
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas containing HCl gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
Experiment embodiment 4
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide to prepare dechlorinating agent as raw material, wherein the granularity of Wingdale is less than 5mm, and the granularity of sodium carbonate and potassium hydroxide is less than 3mm;
Two), by industrial Wingdale former state soak 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is 15%, and then the Wingdale after immersion is placed in the hot conditions calcining 2h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=50: 50 (weight percents) are prepared burden, then premix is carried out, mixing time is 15min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, the finished product bead of screening 3-10mm, and under 100 DEG C of conditions, oven drying at low temperature obtains dechlorinating agent product;
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas containing HCl gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
Experiment embodiment 5
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide to prepare dechlorinating agent as raw material, wherein the granularity of Wingdale is less than 5mm, and the granularity of sodium carbonate and potassium hydroxide is less than 3mm;
Two), by industrial Wingdale former state soak 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is 15%, and then the Wingdale after immersion is placed in the hot conditions calcining 2h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=60: 40 (weight percents) are prepared burden, then premix is carried out, mixing time is 10min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, the finished product bead of screening 3-10mm, and under 100 DEG C of conditions, oven drying at low temperature obtains dechlorinating agent product;
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas containing HCl gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
Experiment embodiment 6
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide to prepare dechlorinating agent as raw material, wherein the granularity of Wingdale is less than 5mm, and the granularity of sodium carbonate and potassium hydroxide is less than 3mm;
Two), by industrial Wingdale former state soak 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is 15%, and then the Wingdale after immersion is placed in the hot conditions calcining 1.5h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=70: 30 (weight percents) are prepared burden, then premix is carried out, mixing time is 13min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, the finished product bead of screening 3-10mm, and under 100 DEG C of conditions, oven drying at low temperature obtains dechlorinating agent product;
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas containing HCl gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
Experiment embodiment 7
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide to prepare dechlorinating agent as raw material, wherein the granularity of Wingdale is less than 5mm, and the granularity of sodium carbonate and potassium hydroxide is less than 3mm;
Two), by industrial Wingdale former state soak 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is 15%, and then the Wingdale after immersion is placed in the hot conditions calcining 1.5h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=40: 60 (weight percents) are prepared burden, then premix is carried out, mixing time is 15min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, the finished product bead of screening 3-10mm, and under 100 DEG C of conditions, oven drying at low temperature obtains dechlorinating agent product;
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas containing HCl gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
Experiment embodiment 8
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide to prepare dechlorinating agent as raw material, wherein the granularity of Wingdale is less than 5mm, and the granularity of sodium carbonate and potassium hydroxide is less than 3mm;
Two), by industrial Wingdale former state soak 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is 10%, and then the Wingdale after immersion is placed in the hot conditions calcining 2h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=50: 50 (weight percents) are prepared burden, then premix is carried out, mixing time is 12min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, the finished product bead of screening 3-10mm, and under 100 DEG C of conditions, oven drying at low temperature obtains dechlorinating agent product;
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas containing HCl gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
Will by step one) to step 4) to obtain and the finished product bead of drying is placed for subsequent use in dry environments.
The Performance Evaluating Indexes of dechlorinating agent
Dechlorination experimentation: remove in experimental installation at HCl and put into a certain amount of dechlorinating agent product, fixes the HCl concentration in bed thickness and top gas.In experimental installation, be filled with experimental gas, keep the flow of experimental gas relatively stable, dechlorinating agent product is fully reacted with experimental gas in experimental installation.
Time of break-through: in dechlorinating agent device, top gas when HCl content is more than 1 ppm in tail gas after dechlorinating agent purification, thinks that dechlorinating agent is penetrated, and is the time of break-through of dechlorinating agent from passing into HCl to dechlorinating agent by the time penetrated.
The measuring method of time of break-through: blast furnace gas flow controls as 5L/min, HCl concentration controls, for 200ppm, to measure the HCl concentration in fixed-bed reactor exit, and record exit HCl concentration reaches the time of 1ppm.
A breakthrough chlorine content: breakthrough chlorine content refers in 0-300 DEG C of temperature range, under the pressure condition of 0.1-0.3MPa, reactor outlet HCl concentration equals import HCl concentration and keeps 10min, and solid dechlorinating agent absorbs the quality percentage of chlorine.Import HCl volume fraction is 0.99%.
The measuring method of a breakthrough chlorine content: blast furnace gas intake is 5L/min, HCl concentration is 1000ppm, and test period is 30min, random taking-up 20 beads adopt gas laser analysis-e/or determining breakthrough chlorine content.
The time of break-through of different dechlorinating agent is different, and time of break-through is longer, illustrates that the real reaction of the HCl in this dechlorinating agent and blast furnace gas is better, under identical bed thickness, is more conducive to the HCl removed in blast furnace gas; A breakthrough chlorine content difference of different dechlorinating agent, a breakthrough chlorine content of dechlorinating agent is higher, illustrates that dechlorinating agent removes the ability of HCl in top gas stronger.
Table 1 be classified as the measured result contrast of the time of break-through of 8 experiment embodiments and a breakthrough chlorine content.
The measurement result of table 1 time of break-through and a breakthrough chlorine content
Result listed by table 1, in dechlorinating agent, the ratio of soft burnt lime stone and sodium carbonate has obvious impact to time of break-through and a breakthrough chlorine content, and the high-temperature calcination time of soft burnt lime stone also affects the effect of dechlorination simultaneously.
Compared with soft burnt lime stone, Na 2cO 3a certain amount of H can be generated when reacting with HCl 2o, so have a higher breakthrough chlorine content, therefore, in dechlorinating agent, the proportioning of the two affects dechlorination effect.
Although Wingdale also has good dechlorination effect, research finds, because Wingdale is after light-burned, part is decomposed, and voidage obviously increases, and improves the dynamic conditions reacted with HCl, dechlorination effect also makes moderate progress, and therefore the present invention has selected soft burnt lime stone.Limestone surfaces has some amount micropore, and micro-pore diameter is between 20 ~ 100 μm, and in unit square millimeter, number cells magnitude is in 0 ~ 10 × 103 range intervals; The micropore that soft burnt lime stone has number ratio more, micro-pore diameter is in 0.1 ~ 20 μm of range intervals, and in unit square millimeter, number cells magnitude is in 0 ~ 10 × 105 range intervals.Gas molecule absorption has selectivity (abbreviation polar adsorption), the molecule that in the easy adsorption gas molecule of dechlorinating agent surface micropore, diameter is close with self micro-pore diameter.The molecular diameter of HCl is at about 10 μm, comparatively close with soft burnt lime stone surface micropore diameter range, according to polar adsorption principle, the HCl molecule in soft burnt lime stone absorption easier than Wingdale blast furnace gas, and then Wingdale dechlorinating agent breakthrough chlorine content can be improved.High-temperature calcination time gesture will inevitably affect calcining effect, thus affects the dechlorinating ability of Wingdale.
KOH also has certain dechlorination effect, but owing to having strong basicity and corrodibility, easily absorbs moisture generation deliquescence around, forms the alkaline solution that alkalescence is very strong, can cause heavy corrosion to blast furnace gas pipeline and other auxiliary facilitys.Therefore the present invention is not with addition of KOH, but design soaks Wingdale with it, and then carries out light-burned, to bring appropriate KOH into, improves dechlorination effect.
By above-mentioned experiment and interpretation of result known, just based on the rational material choice of the application and preparation method, propose a kind of using method being applicable to the dechlorinating agent of blast furnace smelting process and equipment characteristic, metallurgical engineering field can be advantageously applied to, effectively improve the working conditions of equipment, the work-ing life of extension device.

Claims (3)

1. a using method for blast furnace gas dechlorinating agent, it realizes primarily of following steps:
One), select industrial Wingdale, commercial sodium carbonate and potassium hydroxide as raw material for the preparation of dechlorinating agent, wherein the granularity of Wingdale will at below 5mm, and the granularity of sodium carbonate and potassium hydroxide will at below 3mm;
Two), first industrial Wingdale former state is soaked 1h through potassium hydroxide solution, wherein the concentration of potassium hydroxide solution is at 10%-15%, and then the Wingdale after immersion is placed in the hot conditions calcining 1-2h of 700 DEG C;
Three), by calcining after Wingdale (hereinafter referred to as soft burnt lime stone) and sodium carbonate conventional ball milling techniques or other flouring technologies levigate to less than 20 μm, again according to soft burnt lime stone: sodium carbonate=30-70: 70-30 (weight percent) prepares burden, then premix is carried out, mixing time is 10-15min, flouring technology is utilized by the powder mixed to proceed grinding, until the granularity of all powder is all below 80 μm;
Four), with the mixed powder made, with addition of the bentonite of 3%, mixing is dry mixed.Utilize balling disc, vaporific adding water carries out pelletizing, and the finished product bead of screening 3-10mm, dries or oven drying at low temperature obtains dechlorinating agent under 100 DEG C of conditions finished product naturally.
Five), this dechlorinating agent product is placed in fixed container, allows blast furnace gas by fixed container, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas after container to be fixed.
2. the method removing HCl gas according to claim 1, it is characterized in that: the spherical dechlorinating agent product with certain particle size prepared utilizing this technique is placed in fixed container, allow blast furnace gas by fixed container, improve dynamic conditions and the dechlorination effect of reaction.
3. the method removing HCl gas according to claim 1, it is characterized in that: the index that after selecting reaction, in blast furnace gas, the concentration of HCl gas lost efficacy as evaluation dechlorinating agent, the dechlorinating agent again more renewed when HCl gas concentration is greater than 1ppm in the blast furnace gas namely after container to be fixed.
CN201510118754.1A 2015-03-18 2015-03-18 A kind of application method of blast furnace gas antichlor Active CN104774654B (en)

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JP2015124061A JP6073978B2 (en) 2015-03-18 2015-06-19 How to use blast furnace gas dechlorinating agent

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CN114392643A (en) * 2021-12-30 2022-04-26 北京北科环境工程有限公司 Preparation method of dechlorinating agent for blast furnace gas

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