CN108642228A - A kind of method of lime stone mud cake back mixing steel Commercial cultivation - Google Patents
A kind of method of lime stone mud cake back mixing steel Commercial cultivation Download PDFInfo
- Publication number
- CN108642228A CN108642228A CN201810426655.3A CN201810426655A CN108642228A CN 108642228 A CN108642228 A CN 108642228A CN 201810426655 A CN201810426655 A CN 201810426655A CN 108642228 A CN108642228 A CN 108642228A
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- China
- Prior art keywords
- mud cake
- lime stone
- stone mud
- resolution
- stirring
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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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention provides a kind of method of lime stone mud cake back mixing steel Commercial cultivation, includes the following steps：1）Lime stone mud cake is subjected to drying for the first time so that the moisture content of lime stone mud cake uses quick lime and the mixing stacking of lime stone mud cake no more than 10wt%, when dry for the first time, and is shone through turning over airing；2）It stacks resolution and forms resolution material；3）Crushing, stirring forms mixture, and the waterglass for accounting for resolution material 1wt% ~ 3wt% is added during crushing, stirring；4）Mixture enters ball press compression moulding.Using technical solution in the application, other schemes are per ton to reduce 400~500Kg of quick lime usage amount during lime stone mud cake pressure ball more in the prior art；And since mud cake caloric receptivity is larger, it can serve as coolant again.
Description
Technical field
The present invention relates to a kind of methods that lime stone mud cake recycles, and are given birth to more particularly to a kind of lime stone mud cake back mixing steel
Produce the method utilized.
Background technology
Pneumatic steelmaking is, not by external energy, to lean on the object of iron liquid itself using molten iron, steel scrap, ferroalloy as primary raw material
Chemical reaction generates heat and completes steelmaking process in converter between reason heat and iron liquid component.Converter is divided into acidity by refractory material
And alkalinity, being blown into the position in stove by gas has top blast, bottom blowing and side-blown；It is divided into air blown converter by gaseous species and oxygen turns
Stove.Alkaline oxygen top blast and top and bottom combined blown converter are since its speed of production is fast, yield is big, and single furnace output is high, at low cost, investment
It is few, to use most common steelmaking equipment at present.Converter mainly for the production of carbon steel, steel alloy and copper core nickel smelting.
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,
The new older OG methods dust removing effects of OG methods improve, and water consumption declines, but since it still continues to use a large amount of muddy water cycle washing dust-ladens
The purification style of coal gas, water consumption and power consumption are still higher.LT dry method is that Lurgi companies of Germany grind with Thyssen steel plant
Successfully a kind of dry cleaning system of converter gas purification machine coal-gas recovering, the dedusting method wash system without a large amount of turbid circulating waters
Coal gas, using " dry type " system of devaporizer+electrostatic precipitator+gas cooler；With purification efficiency is high, low energy consumption,
The characteristics of briquetting system can be arranged in dry dust, and dust is directly utilized for converter after briquetting.
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 lifes of lime stone mud cake back mixing steel
The method utilized is produced, for solving the problems of the prior art.
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 of lime stone mud cake back mixing steel Commercial cultivation, includes the following steps：
1) lime stone mud cake is carried out dry for the first time so that the moisture content of lime stone mud cake is no more than 10wt%, for the first time
It is stacked using quick lime and the mixing of lime stone mud cake when dry, and is shone through turning over airing；
2) it stacks resolution and forms resolution material；
3) crushing, stirring forms mixture, and the waterglass for accounting for resolution material 1wt%~3wt% is added during crushing, stirring；
4) mixture enters ball press compression moulding.
Lime stone mud cake described herein refers to the lime stone that is added in convertor steelmaking process during roasting
The cheese cake mass that long-term precipitation aggregation is formed.
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), the additive amount of quick lime
For 5wt%~10wt% of lime stone mud cake.The quick lime main component is calcium oxide, is by the high lime of calcium carbonate content
Rock is fired to 900 DEG C or more in the limekiln of ventilation to obtain the final product.
Due to being added to quick lime, the mixture after stirring needs to be cleared up by reasonable time, has generally stirred
It should be ensured that digestion time after finishing.Preferably, the time for resolution being stacked in step 2) is at least 2 hours.
Preferably, in step 3), crushing, stirring process carries out in blender.
Preferably, in step 3), waterglass 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.
Ball press in the application uses high-pressure ball press, be it is a kind of various can will do, wet mashes, pass through prepressing device
It is forced into the ball equipment processed that roll nip is pressed into unit weight compared with high product.Ball press model GY520-150 in the application,
For high-pressure and hydraulic ball press, roller diameter 520mm, maximum pressure is 150 tons between roller.Preferably, in production, institute is controlled
The line pressure ratio for stating ball press is (2~4) ton/cm.
Preferably, further include second of drying process after compression moulding, the dry water content to lime stone mud cake is not
More than 5wt%.It is highly preferred that dry temperature is 60~100 DEG C.It is highly preferred that second be dried in drying box into
It goes, waste heat of origin of heat when pneumatic steelmaking in drying box.
Preferably, it is conserved, is conserved to be placed in indoor seasoning ventilated environment again after second of drying.Generally put
It is at least 24 hours to set the time.
Preferably, the method further includes being sieved to the product of compression moulding, and the mesh screen grain size that when screening uses is not
Less than 5mm.The purpose of screening is to remove the smaller powder of grain size.It is highly preferred that maintenance is sieved after terminating.
Preferably, the underproof powder obtained after screening enters ball press compression moulding again.
The compression strength and drop strength that lime stone product is further improved through redrying, with standing time
Extend, both will not dusting, intensity will not reduce.
Disclosed herein as well is the lime stones that method as described above prepares.Preferably, the granularity of the lime stone
For 5~30mm.
Use disclosed herein as well is lime stone as described above as slag former for converter smelting steel grade in addition to silicon steel
On the way.
Use disclosed herein as well is lime stone as described above as coolant for converter smelting steel grade in addition to silicon steel
On the way.
Using the application above-mentioned technical proposal, the lime stone mud cake pressure ball production line of MCC Baosteel Technology Service Co., Ltd
80 tons of the daily output, you can reach 80 tons with cycling and reutilization lime stone mud cake.Limy ingredient is higher in this lime stone mud cake,
It is used for converter smelting steel grade in addition to silicon steel as slag former, the input amount of lime stone in steelmaking process can be reduced；Using the application
Other schemes are per ton to reduce quick lime usage amount during lime stone mud cake pressure ball more in the prior art for middle technical solution
400~500Kg；And since mud cake recepts the caloric larger, can serve as coolant again, lime stone mud cake pressure ball it is cooling compare according to
2.4 calculate cooling energy.With the cycling and reutilization of lime stone mud cake, high degree solve the raw material it is original required for it is high
The processing costs such as blowdown, reduce dust and CO2Discharge, the wave of environmental pollution and resource caused by solving waste material discharge
Take, steel industry is further pushed to be strided forward to the production of environmentally protective metaplasia.
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.
In the embodiment of the present application, the raw material of use and the The concrete specification of equipment are 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 various can will do, wet mashes, pass through prepressing device
It is forced into the ball equipment processed that roll nip is pressed into unit weight compared with high product.Ball press selection model GY520- in the application
150, 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 150 tons between son.Specifically, in the production of the embodiment of the present application, the line pressure ratio for controlling the ball press is (2
~4) 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 1wt% 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；
The water content of redrying to lime stone mud cake is no more than 2wt% at 40 DEG C.
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 3wt% 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；
The water content of redrying to lime stone mud cake is no more than 2wt% at 45 DEG C.
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 2wt% 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；
The water content of redrying to lime stone mud cake is no more than 2wt% at 45 DEG C.
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 3wt% 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；
The water content of redrying to lime stone mud cake is no more than 2wt% at 45 DEG C.
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 1wt% 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；
The water content of redrying to lime stone mud cake is no more than 2wt% at 45 DEG C.
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；In the case of long-term stack 6 months, crushing phenomenon will not occur, compression strength is good.It will be upper
It states in lime stone input converter, molten steel composition is without exception, uninfluenced.Method is simple and practicable in the application, will be in STEELMAKING PRODUCTION
The lime stone mud cake of generation is made for the limestone particle as slag former and coolant, and balling ratio is high, production line day
Yield is 80 tons so that the abundant recycling of lime stone mud cake maximizes.
Using technical solution in the application more in the prior art other schemes during lime stone mud cake pressure ball, it is per ton can
To reduce 400~500Kg of quick lime usage amount；And since mud cake caloric receptivity is larger, it can serve as coolant, lime stone mud again
The cooling ratio of cake pressure ball calculates cooling energy according to 2.4.With the cycling and reutilization of lime stone mud cake, high degree solves this
The processing costs such as high blowdown, reduce dust and CO required for raw material is original2Discharge solves ring caused by waste material discharge
Border is polluted and the waste of resource.
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 of lime stone mud cake back mixing steel Commercial cultivation, includes the following steps：
1) lime stone mud cake is carried out drying for the first time makes the moisture content of lime stone mud cake be no more than 10wt%, dry for the first time
Shi Caiyong quick limes and the mixing of lime stone mud cake are stacked, and are shone through turning over airing；
2) it stacks resolution and forms resolution material；
3) crushing, stirring forms mixture, and the waterglass for accounting for resolution material 1wt%~3wt% is added during crushing, stirring；
4) mixture enters ball press compression moulding.
2. according to the method described in claim 1, it is characterized in that, in step 1), lime stone mud cake includes the following raw material ingredient
And parts by weight：
3. according to the method described in claim 1, it is characterized in that, the time for stacking resolution in step 2) is at least 2 hours.
4. according to the method described in claim 1, it is characterized in that, in step 3), waterglass is added using Sprayable.
5. according to the method described in claim 1, it is characterized in that, in step 3), water is added in when crushing, stirring, and controls mixing
The water content of material is no more than 7wt%.
6. according to the method described in claim 1, it is characterized in that, further include second of drying process after compression moulding,
The dry water content to lime stone mud cake is no more than 5wt%.
7. according to the method described in claim 1, it is characterized in that, the method further includes being sieved to the product of compression moulding
Point, the mesh screen grain size that when screening uses is not less than 5mm；The underproof powder obtained after screening enters ball press and is pressed into again
Type.
8. a kind of limestone particle prepared by claim 1~7 any one of them method.
9. limestone particle as claimed in claim 8 is used for the purposes of converter smelting steel grade in addition to silicon steel as slag former.
10. limestone particle as claimed in claim 8 is used for the purposes of converter smelting steel grade in addition to silicon steel as coolant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426655.3A CN108642228A (en) | 2018-05-07 | 2018-05-07 | A kind of method of lime stone mud cake back mixing steel Commercial cultivation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810426655.3A CN108642228A (en) | 2018-05-07 | 2018-05-07 | A kind of method of lime stone mud cake back mixing steel Commercial cultivation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108642228A true CN108642228A (en) | 2018-10-12 |
Family
ID=63749203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810426655.3A Pending CN108642228A (en) | 2018-05-07 | 2018-05-07 | A kind of method of lime stone mud cake back mixing steel Commercial cultivation |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719665A (en) * | 2012-07-03 | 2012-10-10 | 唐山东方建工集团有限公司 | Process method and equipment for producing slag-forming agent for making steel by utilizing steel making sludge |
| 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 CN201810426655.3A patent/CN108642228A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719665A (en) * | 2012-07-03 | 2012-10-10 | 唐山东方建工集团有限公司 | Process method and equipment for producing slag-forming agent for making steel by utilizing steel making sludge |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 栾海燕: "石灰石泥饼返生产利用的工艺研究", 《冶金设备》 * |
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Application publication date: 20181012 |