CN106399678B - A kind of pellet balling-up binding agent and preparation method thereof - Google Patents
A kind of pellet balling-up binding agent and preparation method thereof Download PDFInfo
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- CN106399678B CN106399678B CN201610863394.2A CN201610863394A CN106399678B CN 106399678 B CN106399678 B CN 106399678B CN 201610863394 A CN201610863394 A CN 201610863394A CN 106399678 B CN106399678 B CN 106399678B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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Abstract
The invention discloses a kind of pellet balling-up binding agent and preparation method thereof, belong to pellet technical field.According to weight ratio, the binding agent includes sludge, 1%~20% electrofusion magnesia powder, 5%~20% desulfurizing agent and 5%~10% waterglass caused by 55%~75% sewage disposal.Sludge crushing caused by sewage disposal is stirred, sequentially adds electrofusion magnesia powder, desulfurizing agent, dispersant, is stirred and evenly mixed after being eventually adding waterglass, produces the binding agent.The binding agent of the present invention can utilize active ingredient in sludge, realize the resource reutilization of sludge, and and can reduces pellet production cost, improves pelletizing grade.
Description
Technical field
The present invention relates to pellet technical field, more particularly to a kind of pellet balling-up binding agent and preparation method thereof.
Background technology
Pellet is the primary raw material of ironmaking, is mainly formed by Iron concentrate by the effect pelletizing of bonding agent.Binding agent is
The indispensable raw material of pellet is produced, pelletizing production meets water generally using bentonite as binding agent using bentonite at present
Expansion produces the performance of micropore, and green-ball is formed so as to effectively bond Iron concentrate ore deposit.7,000,000 tons of the existing pelletizing production ability of Wuhan Iron and Steel Plant,
Bentonite incorporation is up to 3%, and annual consumption reaches more than 200,000 tons, and consumption of raw materials is big, cost is high.And bentonite burns residual rate height,
Thus reduce pelletizing grade.
Prior art largely takes organic binder bond partly or entirely to substitute bentonite, or adds portions additive pair
Bentonite is modified.But the low intensity of its pre- hot-bulb and finished ball, fail to obtain extensive use so far.
Wuhan Iron and Steel Plant produces about 100,000 tons of sludge every year, mainly takes the mode of landfill to be handled at present, does not occupy soil
Ground resource, environment also being destroyed, the chemical composition of sludge is similar with bentonitic chemical composition, is calcium and magnesium sieve and silica-sesquioxide,
Content more than 80%, and in sludge iron oxide content it is high.Therefore, sludge is used as carrier, and developing one kind can utilize
Active ingredient in sludge, realizes the resource reutilization of sludge, and and can reduces pellet production cost, improves the bonding of pelletizing grade
Agent is significant.
The content of the invention
It is an object of the invention to provide one kind can utilize active ingredient in sludge, realize the resource reutilization of sludge,
And can reduces pellet production cost, improves the pellet balling-up binding agent of pelletizing grade, and the binding agent can substitute swelling
Soil is used for pellet balling-up, improves pellet grade, reduces production cost.
To achieve the above object, the invention provides a kind of pellet balling-up binding agent, according to weight ratio, the bonding
Agent includes sludge, 1%~20% electrofusion magnesia powder, 5%~20% desulfurizing agent caused by 55%~75% sewage disposal
With 5%~10% waterglass.
Further, sludge moisture content caused by the sewage disposal is 60%-80%.
Further, granularity≤0.1mm of the electrofusion magnesia powder.
Further, the desulfurizing agent is one or both of dolomite, lime stone；The dolomite and lime stone
Granularity≤0.1mm.
Further, the modulus of the waterglass is 1.5~2.
Further, the binding agent also includes dispersant, its weight ratio≤2%.
Further, the dispersant is one or both of sodium lignin sulfonate, neopelex.
Further, proportion >=1.28g/cm of the sodium lignin sulfonate3。
Present invention also offers a kind of preparation method of pellet balling-up binding agent, including：
Sludge crushing caused by sewage disposal is stirred, sequentially adds electrofusion magnesia powder, desulfurizing agent, dispersant, finally
Stirred and evenly mixed after adding waterglass, produce the binding agent；Wherein：It is sludge caused by the sewage disposal, electrofusion magnesia powder, de-
The weight ratio respectively 55%~75% of sulphur agent, waterglass and dispersant, 1%~20%, 5%~20%, 5%~10% and
0~2%.
Further, sludge moisture content caused by the sewage disposal is 60%-80%；The desulfurizing agent be dolomite,
One or both of lime stone；The dispersant is one or both of sodium lignin sulfonate, neopelex.
The one or more technical schemes provided in the embodiment of the present invention, have at least the following technical effects or advantages：
1st, the pellet balling-up binding agent of the embodiment of the present invention, uses sludge caused by sewage disposal as primary raw material,
Performance optimization is carried out to sludge by adding additive, forms a kind of new binding agent, the binding agent can substitute bentonite, reduce
Residual rate is burnt, so as to improve the grade of pellet.
2nd, the pellet balling-up binding agent of the embodiment of the present invention, the binding agent can effective for pellet balling-up, and
Pelletizing has enough intensity after shaping.
3rd, the pellet balling-up binding agent of the embodiment of the present invention, preparation method is simple, and at recycling sewage
Sludge caused by reason, one reduces pellet production cost, adds the competitiveness of product in market；Two make the sludge realize two
The secondary utilization of resources, the effect of recycling economy is reached.
Embodiment
The embodiments of the invention provide one kind can utilize active ingredient in sludge, realize the resource reutilization of sludge, again
Pellet production cost can be reduced, improve the pellet balling-up binding agent of pelletizing grade；The binding agent can exist instead of bentonite
Used in pellet, Iron concentrate ore deposit is effectively molded, and pelletizing has enough intensity after shaping, improves the grade of pellet,
Reduce production cost.
To achieve the above object, the embodiments of the invention provide a kind of pellet balling-up binding agent, according to weight ratio, institute
State binding agent and include sludge, 1%~20% electrofusion magnesia powder, 5%~20% caused by 55%~75% sewage disposal
Desulfurizing agent and 5%~10% waterglass.
In the embodiment of the present invention, sludge moisture content caused by the sewage disposal is 60%-80%.Current domestic and international scientific research
The bottleneck problem for the Treatment of Sludge that worker generally acknowledges, it is exactly the problem of sludge moisture content is big.Moisture in sludge is broadly divided into four
Major class, six groups.Wherein four major classes mainly include Interstitial Water, surface water, intermediary water and with reference to water, and moisture will be combined in six groups
For chemical water and the crystallization water, while intermediary water can be also divided into complexing water and weak bound water.Due to substantial amounts of knot in sludge be present
Heshui, intermediary water and surface water, sludge drying dehydration problem are always the No.1 problem for perplexing current researcher.It is thorough
The influence and restriction of this kind of water are broken away from, the method that must just use the method even mechanical force and chemical of chemistry, sludge is entered
Row modification.The present invention is modified processing to sludge by adding additive, and each component interphase interaction forms the present invention
Binding agent.
In the embodiment of the present invention, granularity≤0.1mm of the electrofusion magnesia powder.Granularity is excessive to be unfavorable for mixing, so as to shadow
Binder Properties are rung, undersized can increase cost.
In the embodiment of the present invention, the desulfurizing agent is one or both of dolomite, lime stone.
Wherein, the dolomite and lime stone granularity≤0.1mm.Granularity is excessive to be unfavorable for mixing, so as to influence to glue
Agent performance is tied, undersized can increase cost.
In the embodiment of the present invention, the modulus of the waterglass is 1.5~2.Modulus is excessive to be unfavorable for sodium silicate dissolving, modulus
Too small bonding force diminishes, it is impossible to reaches optimal adhesive effect.
Further, the binding agent of the embodiment of the present invention also includes dispersant, its weight ratio≤2%.The dispersant is
One or both of sodium lignin sulfonate, neopelex.
Wherein, proportion >=1.28g/cm of the sodium lignin sulfonate3.Proportion is bigger to illustrate that its molecular weight is bigger, has
Preferably dispersiveness and high-temperature stability.
The selection of each component and the control of weight percentage in pellet balling-up binding agent provided in an embodiment of the present invention
System is to be based on following principle：
Sludge caused by sewage disposal：Attachment function carrier is provided, while adjusts basicity, contains oxidation in sludge in addition
Iron, it can also lift pelletizing grade.Main component includes organic matter, SiO in sludge2、CaO、MgO、Fe2O3、Al2O3And soluble salt.
Electrofusion magnesia powder：The mainly acid-base value of regulating system, meanwhile, the addition of magnesia powder helps to lift the strong of green-ball
Degree.Its dosage is according to CaO in sludge and SiO2Content determine, be mainly used in the acid-base value of regulating system, i.e. CaO and
SiO2Ratio.Its addition crosses multisystem alkalescence enhancing, and the very few systemic acidity of addition is too strong, influences Binder Properties.
Dolomite and lime stone：Desulfidation is primarily served, while meets water exothermic heat of reaction, binding agent each component can be promoted
It is scattered.Its dosage can excessively increase cost, also influence the composition (referring mainly to CaO) of system, and dosage is very few not to have desulfurization work
With.
Waterglass：Cementation is mainly played, effectively is bonded together to form some strength by mineral powder granular, realizes pelletizing
Function.Its dosage can excessively increase cost, very few not have cementation.
Sodium lignin sulfonate and neopelex：Peptizaiton is mainly played, reduces surface tension, promotion is various to be had
It is scattered in system to imitate composition.Its dosage excessively easily foams, and makes slurries retrogradation, very few not have peptizaiton.
The content of above each component is all needed by well-designed, configuration, and the embodiment of the present invention is by strictly controlling each component
Content, in pelletizing shaping, the various performance parameters of pelletizing are all preferable for the binding agent use of configuration.
By the above as can be seen that the embodiment of the present invention uses sludge caused by sewage disposal as primary raw material, lead to
Cross addition additive：Electrofusion magnesia powder, dolomite and/or lime stone, waterglass and sodium lignin sulfonate and/or dodecyl
Benzene sulfonic acid sodium salt carries out performance optimization to sludge, forms a kind of new binding agent, the binding agent can substitute bentonite, effective for ball
Nodulizing balling-up, and pelletizing has enough intensity after shaping, improves the grade of pellet.Pellet production cost is reduced, it is real
The resource reutilization of sludge is showed.
The embodiment of the present invention additionally provides a kind of preparation method of above-mentioned binding agent.
A kind of preparation method of pellet balling-up binding agent, including：
Sludge crushing caused by sewage disposal is stirred, sequentially adds electrofusion magnesia powder, desulfurizing agent, dispersant, finally
Stirred and evenly mixed after adding waterglass, produce the binding agent；Wherein：It is sludge caused by the sewage disposal, electrofusion magnesia powder, de-
The weight ratio respectively 55%~75% of sulphur agent, waterglass and dispersant, 1%~20%, 5%~20%, 5%~10% and
0~2%.
Wherein, sludge moisture content caused by the sewage disposal is 60%-80%.The desulfurizing agent is dolomite, lime
One or both of stone.The dispersant is one or both of sodium lignin sulfonate, neopelex.
It is for a more detailed description to the present invention by the following examples.These embodiments are only to the optimal embodiment party of the present invention
The description of formula, there is not any limitation to the scope of the present invention.
Sludge is sludge caused by Wuhan Iron and Steel Plant sewage plant used by following examples.Its main chemical compositions content is shown in Table 1,
But the sludge of Wuhan Iron and Steel Plant is not limited in specific implementation process, can be adapted to by suitably adjusting the content of additive between different sludge
Component difference.
The sludge main chemical compositions of table 1
| Composition | Organic matter | SiO2 | CaO | MgO | Fe2O3 | Al2O3 | Soluble salt |
| Parts by weight | 11.28 | 44.35 | 7.75 | 1.07 | 7.80 | 18.42 | 5.33 |
Embodiment 1
Sewage plant sludge 70%
Electrofusion magnesia powder 9%
Dolomite 5%
Lime stone 5%
Waterglass 9%
Sodium lignin sulfonate 1%
Neopelex 1%
In the embodiment, fused magnesite Powder Particle Size is 200 mesh (0.074mm), and the granularity of dolomite and lime stone is 200 mesh
(0.074mm), modulus of water glass 1.8, the proportion of sodium lignin sulfonate is 1.3.
The binding agent preparation process is：Sludge is placed in mixer and crushes stirring, sequentially adds electrofusion magnesia powder, white
Marble and lime stone, sodium lignin sulfonate and neopelex, are stirred and evenly mixed, slurrying is treated after being eventually adding waterglass
With.
Embodiment 2
Sewage plant sludge 55%
Electrofusion magnesia powder 15%
Dolomite 10%
Lime stone 10%
Waterglass 8.5%
Sodium lignin sulfonate 1.5%
In the embodiment, fused magnesite Powder Particle Size is 200 mesh (0.074mm), and the granularity of dolomite and lime stone is 200 mesh
(0.074mm), modulus of water glass 1.8, the proportion of sodium lignin sulfonate is 1.3.
The binding agent preparation process is：Sludge is placed in mixer and crushes stirring, sequentially adds electrofusion magnesia powder, white
Marble and lime stone, sodium lignin sulfonate, are stirred and evenly mixed, slurrying is stand-by after being eventually adding waterglass.
Embodiment 3
Sewage plant sludge 75%
Electrofusion magnesia powder 1%
Dolomite 13%
Waterglass 10%
Sodium lignin sulfonate 0.5%
Neopelex 0.5%
In the embodiment, fused magnesite Powder Particle Size is 200 mesh (0.074mm), and Size of Dolomite is 200 mesh (0.074mm),
Modulus of water glass is 1.8, and the proportion of sodium lignin sulfonate is 1.3.
The binding agent preparation process is：Sludge is placed in mixer and crushes stirring, sequentially adds electrofusion magnesia powder, white
Marble, sodium lignin sulfonate and neopelex, stirred and evenly mixed after being eventually adding waterglass, slurrying is stand-by.
Embodiment 4
Sewage plant sludge 68%
Electrofusion magnesia powder 20%
Lime stone 5%
Waterglass 5%
Neopelex 2%
In the embodiment, fused magnesite Powder Particle Size is 200 mesh (0.074mm), and the granularity of lime stone is 200 mesh
(0.074mm), modulus of water glass 1.5, the proportion of sodium lignin sulfonate is 1.3.
The binding agent preparation process is：Sludge is placed in mixer and crushes stirring, sequentially adds electrofusion magnesia powder, stone
Lime stone, neopelex, stirred and evenly mixed after being eventually adding waterglass, slurrying is stand-by.
Embodiment 5
Sewage plant sludge 60%
Electrofusion magnesia powder 18%
Dolomite 7%
Lime stone 7%
Waterglass 7.5%
Neopelex 0.5%
In the embodiment, fused magnesite Powder Particle Size is 200 mesh, and the granularity of dolomite and lime stone is 200 mesh, waterglass mould
Number is 1.5, and the proportion of sodium lignin sulfonate is 1.3.
The binding agent preparation process is：Sludge is placed in mixer and crushes stirring, sequentially adds electrofusion magnesia powder, white
Marble and lime stone, neopelex, are stirred and evenly mixed, slurrying is stand-by after being eventually adding waterglass.
Embodiment 6
Sewage plant sludge 70%
Electrofusion magnesia powder 6%
Dolomite 8%
Lime stone 8%
Waterglass 8%
In the embodiment, fused magnesite Powder Particle Size is 200 mesh, and the granularity of dolomite and lime stone is 200 mesh, waterglass mould
Number is 2, and the proportion of sodium lignin sulfonate is 1.3.
The binding agent preparation process is：Sludge is placed in mixer and crushes stirring, sequentially adds electrofusion magnesia powder, white
Marble and lime stone, stirred and evenly mixed after being eventually adding waterglass, slurrying is stand-by.Application examples
The use of Iron concentrate ore deposit is raw material, binding agent prepared by addition embodiment of the present invention 1-6 carries out dispensing, is added after mixing
Pelletizing in pelletizer, it is molded for Iron concentrate ore deposit, binding agent mixed ratio is 8%.The binding agent in embodiment 1-6 is given birth to respectively
The green pellets of production and roasting ball carry out performance detection, the pelletizing of the binding agent production in Application Example 1-6 and apply bentonite
The performance parameter of the pelletizing of production is contrasted referring to table 1.
The pellet characteristics parameter comparison of table 1
As can be seen from Table 1, green-ball Falling strength, the pelletizing of the pellet produced using the binding agent of the embodiment of the present invention
Compression strength, preheated pellets voidage and pelletizing grade do the pellet that binding agent produced than the same period using bentonite to be had
Improved.
The binding agent of the present invention realizes the recycling of resource using sludge caused by sewage disposal as primary raw material；Substitution
Binding agent of the bentonite as pelletizing, the grade of pellet is improved, reduces the consumption to bentonite resource, reduces production
Cost.In addition, the binding agent preparation method is simple, it is easy to industrialize, has broad application prospects.
It should be noted last that above embodiment is merely illustrative of the technical solution of the present invention and unrestricted,
Although the present invention is described in detail with reference to example, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, it all should cover
Among scope of the presently claimed invention.
Claims (8)
1. a kind of pellet balling-up binding agent, it is characterised in that according to weight ratio, the binding agent includes 55%~75%
Sludge, 1%~20% electrofusion magnesia powder, 5%~20% desulfurizing agent and 5%~10% water glass caused by sewage disposal
Glass；
Wherein；Granularity≤0.1mm of the electrofusion magnesia powder；The modulus of the waterglass is 1.5~2.
2. pellet balling-up binding agent as claimed in claim 1, it is characterised in that sludge caused by the sewage disposal contains
Water is 60%-80%.
3. pellet balling-up binding agent as claimed in claim 1, it is characterised in that the desulfurizing agent is dolomite, lime
One or both of stone；The granularity of the dolomite and lime stone≤0.1mm.
4. the pellet balling-up binding agent as described in one of claim 1-3, it is characterised in that the binding agent, which also includes, to be divided
Powder, its weight ratio≤2%.
5. pellet balling-up binding agent as claimed in claim 4, it is characterised in that the dispersant is lignin sulfonic acid
One or both of sodium, neopelex.
6. pellet balling-up binding agent as claimed in claim 5, it is characterised in that the proportion of the sodium lignin sulfonate >=
1.28g/cm3。
A kind of 7. preparation method of pellet balling-up binding agent, it is characterised in that including：
Sludge crushing caused by sewage disposal is stirred, electrofusion magnesia powder, desulfurizing agent, dispersant is sequentially added, is eventually adding
Stirred and evenly mixed after waterglass, produce the binding agent；Wherein：Sludge, electrofusion magnesia powder, desulfurization caused by the sewage disposal
The weight ratio respectively 55%~75%, 1%~20%, 5%~20%, 5%~10% and 0 of agent, waterglass and dispersant
~2%；
Wherein；Granularity≤0.1mm of the electrofusion magnesia powder；The modulus of the waterglass is 1.5~2.
8. the preparation method of pellet balling-up binding agent as claimed in claim 7, it is characterised in that the sewage disposal production
Raw sludge moisture content is 60%-80%；The desulfurizing agent is one or both of dolomite, lime stone；The dispersant
For one or both of sodium lignin sulfonate, neopelex.
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| CN109988912B (en) * | 2019-05-20 | 2020-05-05 | 鸿灌环境技术有限公司 | Resource utilization method of landfill leachate |
| CN110699543B (en) * | 2019-11-22 | 2020-12-25 | 中南大学 | Method for preparing iron ore sintered pellet binder by using steel oily sludge, binder and application |
| CN111500857B (en) * | 2020-04-15 | 2021-08-27 | 山西太钢不锈钢股份有限公司 | Method for improving pelletizing rate of green pellets of alkaline pellets |
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