CN108588329A - A method of improving lime stone mud cake compression moulding rate - Google Patents
A method of improving lime stone mud cake compression moulding rate Download PDFInfo
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- CN108588329A CN108588329A CN201810426653.4A CN201810426653A CN108588329A CN 108588329 A CN108588329 A CN 108588329A CN 201810426653 A CN201810426653 A CN 201810426653A CN 108588329 A CN108588329 A CN 108588329A
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- China
- Prior art keywords
- lime stone
- mud cake
- stone mud
- resolution
- compression moulding
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present invention provides a kind of method improving lime stone mud cake compression moulding rate, includes the following steps：Lime stone mud cake dryness in the sun to moisture content is no more than 10wt%；It stacks resolution and forms resolution material；Resolution material crushing, stirring is formed into mixture；The water glass of binder for accounting for resolution material 5wt% ~ 10wt% is added during crushing, stirring；Mixture enters ball press compression moulding.Simple and practicable by above-mentioned technical proposal in the application, lime stone mud cake balling ratio once freely falls to cement floor in 85% or more, and 2 meters of height, is not more than 5 pieces after broken；Lime stone mud cake is effectively raised using method in the application and is pressed into rate, lime stone mud cake pressure ball production line day 80 tons of constant.
Description
Technical field
The present invention relates to a kind of field of steel-making, more particularly to a kind of method improving lime stone mud cake compression moulding rate.
Background technology
In recent years, China's steelmaking converter used forth generation wet method, and the dry method introduced；Make converter coal gas purification skill
Art achieves breakthrough.
New OG is German Lucci corporation special technology, and Kawasaki, Japan heavy industry enjoys the right to use of the technology, and new OG methods are older
OG method dust removing effects improve, and water consumption declines, but since it still continues to use the purification of a large amount of muddy water cycle washing dust-laden coal gas
Mode, water consumption and power consumption are still higher.
LT dry method is a kind of converter gas purification machine-made egg-shaped or honey-comb coal briquets gas that Lurgi companies of Germany succeed in developing with Thyssen steel plant
The dry cleaning system of recycling, which does not have to a large amount of turbid circulating waters and washs coal gas, using devaporizer+electrostatic precipitator
" dry type " system of+gas cooler；With purification efficiency height, low energy consumption, briquetting system can be arranged in dry dust, and dust is through briquetting
The characteristics of directly being utilized afterwards for converter.
A large amount of converter mud, dedusting are generated by OG methods, LT dry method electric dust-removing process in steelwork converter production process
Ash, FeO, CaO of high-content theoretically can be used as making steel coolant recycling, but since bof sludge particle is thinner,
Viscosity is smaller, and processing is very difficult, and utilization rate is low, leads to the waste of a large amount of available resources, while causing the dirt of plant environment
Dye.It is useful for the technique that lime stone returns STEELMAKING PRODUCTION at present, but under mesolow, the direct pressing molding rate of lime stone mud cake
It is extremely low.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of compactings of raising lime stone mud cake
The method of ratio of briquetting, for solving the problems, such as that steelwork converter sludge in the prior art and dedusting ash utilization rate are low.
In order to achieve the above objects and other related objects, the present invention obtains by the following technical programs.
The present invention provides a kind of method improving lime stone mud cake compression moulding rate, includes the following steps：
1) lime stone mud cake dryness in the sun to moisture content is no more than 10wt%；
2) it stacks resolution and forms resolution material；
3) resolution material crushing, stirring is formed into mixture；It is added during crushing, stirring and accounts for resolution material 5wt%~10wt%
Sodium silicate binder；
4) mixture enters ball press compression moulding.
Preferably, in step 1), lime stone mud cake includes the following raw material ingredient and parts by weight：
Drying is to influence one of the factor of lime stone mud cake agglomerate intensity.Preferably, in step 1), in dryness in the sun to
The quick lime of 5wt%~10wt% is added in lime stone mud cake.It is used in the application and accounts for lime stone mud cake 5wt%~10wt%'s
Calcium lime powder carries out mixing stacking with lime stone mud cake, and dryness in the sun makes moisture content of the cake be no more than after reaction
10wt%, to ensure the requirement for meeting subsequent production.The quick lime main component is calcium oxide, is that calcium carbonate content is high
Limestone is fired to 900 DEG C or more in the limekiln of ventilation to obtain the final product.
Preferably, it in step 1), carries out adding heat assisted drying using the waste heat generated in steelmaking process.
Preferably, in step 2), resolution at least 2 hours is stacked.
Preferably, crushing, stirring carries out in blender in step 3).
Preferably, the mixture is delivered to ball press by conveyer belt by the discharge port of blender.
Preferably, the waterglass in step 3) is added using Sprayable.
Preferably, in step 3), water is added in when crushing, stirring, and the water content for controlling mixture is no more than 7wt%.It is more excellent
Water is added with Sprayable in selection of land.
In the application step 4) ball press be middle pressure ball press, be it is a kind of can will it is various do, wet mashes, be a kind of dependence
Certainly reenter roll nip is made the higher ball equipment processed of unit weight to material.Ball press model ZY520-100 in the application,
It presses ball press for middle hydraulic fluid, and roller diameter 520mm, maximum pressure is 100 tons between roller.Preferably, when in use, described
The line pressure ratio of ball press is (1~2) ton/cm.
Preferably, further include being dried after compression moulding, the dry water content to lime stone mud cake is no more than
2wt%.It is highly preferred that dry temperature is 40~55 DEG C.
Disclosed herein as well is the lime stones that method as described above prepares.Preferably, the granularity of the lime stone
For 5~30mm.
Disclosed herein as well is the purposes that such as above-mentioned lime stone is used for converter smelting steel grade in addition to silicon steel.
Simple and practicable by above-mentioned technical proposal in the application, lime stone mud cake balling ratio is in 85% or more, and 2 meters of height
Degree once freely falls to cement floor, is not more than 5 pieces after broken；Lime stone mud cake is effectively raised using method in the application
Be pressed into rate, lime stone mud cake pressure ball production line day 80 tons of constant, you can reach 80 tons with cycling and reutilization lime stone mud cake, stone
The abundant recycling of lime stone mud cake, high degree solve the raw material it is original required for the processing costs such as high blowdown, and
The design solves that original die mould balling ratio is low, the problem of balling-up intensity deficiency, and crucial institute is solved for lime stone mud cake production line
Reducing the dust emission that balling-up enters stove process, is being conducive to that the environmentally protective metaplasia production of steel industry is further pushed to stride forward.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this explanations by particular specific embodiment below
Content disclosed by book understands other advantages and effect of the present invention easily.
Before further describing the specific embodiments of the present invention, it should be appreciated that protection scope of the present invention is not limited to down
State specific specific embodiment；It is also understood that the term used in the embodiment of the present invention is specific specific in order to describe
Embodiment, the protection domain being not intended to be limiting of the invention.The test method of actual conditions is not specified in the following example,
Usually according to normal condition, or according to the condition proposed by each manufacturer.
When embodiment provides numberical range, it should be appreciated that except non-present invention is otherwise noted, two ends of each numberical range
Any one numerical value can be selected between point and two endpoints.Unless otherwise defined, in the present invention all technologies for using and
Scientific terminology is identical as the normally understood meaning of those skilled in the art of the present technique.Except used in embodiment specific method, equipment,
Outside material, the record according to those skilled in the art to the grasp of the prior art and the present invention can also use and this
Any method, equipment and the material of the similar or equivalent prior art of method, equipment described in inventive embodiments, material come real
The existing present invention.
The main specifications of the raw material and equipment that are used in the embodiment of the present application is as follows.
Pending lime stone mud cake is by Zhong Ye bao steel technologies Co., Ltd in convertor steelmaking process transfer in the application
The lime stone added in stove the cheese cake mass that precipitation aggregation for a long time is formed in roasting.
Ball press in the application uses high-pressure ball press, be it is a kind of can will various dry, wet mashes, be a kind of by object
Material reenters the ball equipment processed that roll nip is pressed into unit weight compared with high product certainly.Ball press selection model ZY520- in the application
100, it is produced by Luoyang Zhongyuan Mining Machine Manufactor Co., Ltd., is high-pressure and hydraulic ball press, roller diameter 520mm, roller
Maximum pressure is 100 tons between son.Specifically, in the production of the embodiment of the present application, the line pressure ratio for controlling the ball press is (1
~2) ton/cm.
Embodiment 1
The lime stone mud cake used in the present embodiment includes the following raw material ingredient and parts by weight：
The method that lime stone mud cake compression moulding rate is improved in the present embodiment, includes the following steps：
By lime stone mud cake dryness in the sun, moisture content of the cake is reduced so that mud cake becomes powdering by bulk, in dryness in the sun
The quick lime for adding 5wt% into lime stone mud cake in the process, stirs evenly；Through measuring moisture content as 8wt% after dryness in the sun；
Lime stone mud cake after dryness in the sun is stacked resolution and formed to clear up and expects to form within 2 hours resolution material；
Resolution material crushing, stirring is formed into mixture；Resolution material 5wt% is accounted for Sprayable addition during crushing, stirring
Water glass of binder；If crushing, stirring needs can also spray water appropriate, the water content for controlling mixture is no more than
7wt%；
Mixture enters ball press compression moulding；
It is dried at 40 DEG C to the water content of lime stone mud cake and is no more than 2wt%.
Embodiment 2
The lime stone mud cake used in the present embodiment includes the following raw material ingredient and parts by weight：
The method that lime stone mud cake compression moulding rate is improved in the present embodiment, includes the following steps：
By lime stone mud cake dryness in the sun, moisture content of the cake is reduced so that mud cake becomes powdering by bulk, in dryness in the sun
The quick lime for adding 6wt% into lime stone mud cake in the process, stirs evenly；It is through measuring moisture content after dryness in the sun
10wt%；
Lime stone mud cake after dryness in the sun is stacked resolution and formed to clear up and expects to form within 3 hours resolution material；
Resolution material crushing, stirring is formed into mixture；Resolution material 6wt% is accounted for Sprayable addition during crushing, stirring
Water glass of binder；If crushing, stirring needs can also spray water appropriate, the water content for controlling mixture is no more than
7wt%；
Mixture enters ball press compression moulding；
It is dried at 45 DEG C to the water content of lime stone mud cake and is no more than 2wt%.
Embodiment 3
The lime stone mud cake used in the present embodiment includes the following raw material ingredient and parts by weight：
The method that lime stone mud cake compression moulding rate is improved in the present embodiment, includes the following steps：
By lime stone mud cake dryness in the sun, moisture content of the cake is reduced so that mud cake becomes powdering by bulk, in dryness in the sun
The quick lime for adding 7wt% into lime stone mud cake in the process, stirs evenly；Through measuring moisture content as 6wt% after dryness in the sun；
Lime stone mud cake after dryness in the sun is stacked resolution and formed to clear up and expects to form within 3 hours resolution material；
Resolution material crushing, stirring is formed into mixture；Resolution material 8wt% is accounted for Sprayable addition during crushing, stirring
Water glass of binder；If crushing, stirring needs can also spray water appropriate, the water content for controlling mixture is no more than
7wt%；
Mixture enters ball press compression moulding；
It is dried at 45 DEG C to the water content of lime stone mud cake and is no more than 2wt%.
Embodiment 4
The lime stone mud cake used in the present embodiment includes the following raw material ingredient and parts by weight：
The method that lime stone mud cake compression moulding rate is improved in the present embodiment, includes the following steps：
By lime stone mud cake dryness in the sun, moisture content of the cake is reduced so that mud cake becomes powdering by bulk, in dryness in the sun
The quick lime for adding 9wt% into lime stone mud cake in the process, stirs evenly；Through measuring moisture content as 7wt% after dryness in the sun；
Lime stone mud cake after dryness in the sun is stacked resolution and formed to clear up and expects to form within 2 hours resolution material；
Resolution material crushing, stirring is formed into mixture；Resolution material 8wt% is accounted for Sprayable addition during crushing, stirring
Water glass of binder；If crushing, stirring needs can also spray water appropriate, the water content for controlling mixture is no more than
7wt%；
Mixture enters ball press compression moulding；
It is dried at 45 DEG C to the water content of lime stone mud cake and is no more than 2wt%.
Embodiment 5
The lime stone mud cake used in the present embodiment includes the following raw material ingredient and parts by weight：
The method that lime stone mud cake compression moulding rate is improved in the present embodiment, includes the following steps：
By lime stone mud cake dryness in the sun, moisture content of the cake is reduced so that mud cake becomes powdering by bulk, in dryness in the sun
The quick lime for adding 10wt% into lime stone mud cake in the process, stirs evenly；It is through measuring moisture content after dryness in the sun
6wt%；
Lime stone mud cake after dryness in the sun is stacked resolution and formed to clear up and expects to form within 2 hours resolution material；
Resolution material crushing, stirring is formed into mixture；Resolution material 10wt% is accounted for Sprayable addition during crushing, stirring
Water glass of binder；If crushing, stirring needs can also spray water appropriate, the water content for controlling mixture is no more than
7wt%；
Mixture enters ball press compression moulding；
It is dried at 45 DEG C to the water content of lime stone mud cake and is no more than 2wt%.
After measured, the granularity for the lime stone that in the embodiment of the present application 1~5 prepared by method is 5~30mm, and lime stone mud cake
2 meters of height of limestone particle after 85% or more, compression moulding of balling ratio once freely fall to cement floor, it is broken after not
More than 5 pieces, intensity is preferable.Above-mentioned lime stone is put into converter, molten steel composition is without exception, uninfluenced.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of method improving lime stone mud cake compression moulding rate, includes the following steps：
1) lime stone mud cake dryness in the sun to moisture content is no more than 10wt%；
2) it stacks resolution and forms resolution material；
3) resolution material crushing, stirring is formed into mixture；It is added during crushing, stirring and accounts for the viscous of resolution material 5wt%~10wt%
Tie agent waterglass；
4) mixture enters ball press compression moulding.
2. the method as described in claim 1, which is characterized in that in step 1), lime stone mud cake include the following raw material ingredient and
Parts by weight：
3. the method as described in claim 1, which is characterized in that in step 1), add into lime stone mud cake in dryness in the sun
Add the calcium oxide calcium lime powder of 5wt%~10wt%.
4. the method as described in claim 1, which is characterized in that in step 2), stack resolution at least 2 hours.
5. the method as described in claim 1, which is characterized in that in step 3), waterglass is added using Sprayable.
6. the method as described in claim 1, which is characterized in that in step 3), water is added in when crushing, stirring, and controls mixture
Water content be no more than 7wt%.
7. the method as described in claim 1, which is characterized in that further include being dried after compression moulding, it is dry to stone
The water content of lime stone mud cake is no more than 2wt%.
8. a kind of lime stone prepared by claim 1~7 any one of them method.
9. lime stone as claimed in claim 8, which is characterized in that the granularity of the lime stone is 5~30mm.
10. a kind of lime stone as claimed in claim 8 is used for the purposes of converter smelting steel grade in addition to silicon steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810426653.4A CN108588329A (en) | 2018-05-07 | 2018-05-07 | A method of improving lime stone mud cake compression moulding rate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810426653.4A CN108588329A (en) | 2018-05-07 | 2018-05-07 | A method of improving lime stone mud cake compression moulding rate |
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| CN108588329A true CN108588329A (en) | 2018-09-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961868A (en) * | 2020-08-07 | 2020-11-20 | 阳春新钢铁有限责任公司 | Digestion preparation method of converter waste sludge |
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| CN101559299A (en) * | 2008-04-16 | 2009-10-21 | 中冶宝钢技术服务有限公司 | Processing technology for recycle of metallurgical solid waste |
| CN105174914A (en) * | 2015-08-13 | 2015-12-23 | 上海中冶环境工程科技有限公司 | Method for preparing ceramsite with metallurgical waste slag as raw material |
| CN106636532A (en) * | 2016-09-19 | 2017-05-10 | 中冶宝钢技术服务有限公司 | Limestone mud cake re-production auxiliary material and preparation technique thereof |
-
2018
- 2018-05-07 CN CN201810426653.4A patent/CN108588329A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559299A (en) * | 2008-04-16 | 2009-10-21 | 中冶宝钢技术服务有限公司 | Processing technology for recycle of metallurgical solid waste |
| CN105174914A (en) * | 2015-08-13 | 2015-12-23 | 上海中冶环境工程科技有限公司 | Method for preparing ceramsite with metallurgical waste slag as raw material |
| CN106636532A (en) * | 2016-09-19 | 2017-05-10 | 中冶宝钢技术服务有限公司 | Limestone mud cake re-production auxiliary material and preparation technique thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961868A (en) * | 2020-08-07 | 2020-11-20 | 阳春新钢铁有限责任公司 | Digestion preparation method of converter waste sludge |
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Application publication date: 20180928 |