CN106399678A - Binder for pelletizing of pellet ores and preparation method of binder - Google Patents
Binder for pelletizing of pellet ores and preparation method of binder Download PDFInfo
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- CN106399678A CN106399678A CN201610863394.2A CN201610863394A CN106399678A CN 106399678 A CN106399678 A CN 106399678A CN 201610863394 A CN201610863394 A CN 201610863394A CN 106399678 A CN106399678 A CN 106399678A
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- binding agent
- pellet
- mud
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- balling
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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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- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a binder for pelletizing of pellet ores and a preparation method of the binder, and belongs to the technical field of pellet ores. The binder comprises the following components in percentages by weight: 55-75% of sludge produced by sewage treatment, 1-20% of fused magnesite powder, 5-20% of a desulfurizer and 5-10% of water glass. The sludge produced by sewage treatment is pulverized and stirred, is then added with the fused magnesite powder, the desulfurizer and a dispersant successively, and finally is added with the water glass, and then the components are stirred and mixed uniformly to obtain the binder. By the binder, effective constituents in the sludge can be utilized, sludge resources are recycled, furthermore, production cost of the pellet ores can be reduced, and the grade of pellets is increased.
Description
Technical field
The present invention relates to pellet technical field, 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 the effect pelletizing of bonding agent by Iron concentrate.Binding agent is
Produce the indispensable raw material of pellet, the commonly used bentonite of current pelletizing production, as binding agent, meets water using bentonite
Expand the performance producing micropore, thus effectively bonding Iron concentrate ore deposit forms green-ball.7,000,000 tons of Wuhan Iron and Steel Plant existing pelletizing production ability,
Bentonite incorporation is up to 3%, and annual consumption reaches more than 200,000 tons, and consumption of raw materials is big, high cost.And bentonite burns residual rate height,
Thus reduce pelletizing grade.
Prior art major part takes organic binder bond partly or entirely to substitute bentonite, or adds portions additive pair
Bentonite is modified.But its pre- hot-bulb and the low intensity of finished ball, fail to obtain extensive application so far.
Wuhan Iron and Steel Plant produces about 100,000 tons of mud every year, mainly takes the mode of landfill to be processed at present, does not occupy soil
Ground resource, also destroys environment, the chemical composition of mud is similar with bentonitic chemical composition, is calcium and magnesium sieve and silica-sesquioxide,
Content is more than 80%, and in mud, the content of iron oxide is high.Therefore, it is carrier using mud, developing one kind can utilize
Active ingredient in mud, realizes the resource reutilization of mud, can reduce pellet production cost, the bonding of raising pelletizing grade again
Agent is significant.
Content of the invention
It is an object of the invention to provide one kind can realize the resource reutilization of mud using active ingredient in mud,
Pellet production cost, the pellet balling-up binding agent of raising pelletizing grade can be reduced, this binding agent can replace swelling again
Soil is used for pellet balling-up, improves pellet grade, reduces production cost.
For achieving the above object, the invention provides a kind of pellet balling-up binding agent, according to weight ratio, described bonding
Agent comprise 55%～75% sewage disposal produce mud, 1%～20% electrofusion magnesia powder, 5%～20% desulfurizing agent
With 5%～10% waterglass.
Further, the sludge moisture content that described sewage disposal produces is 60%-80%.
Further, the granularity≤0.1mm of described electrofusion magnesia powder.
Further, described desulfurizing agent is one of dolomite, lime stone or two kinds；Described dolomite and lime stone
Granularity all≤0.1mm.
Further, the modulus of described waterglass is 1.5～2.
Further, described binding agent also comprises dispersant, its weight ratio≤2%.
Further, described dispersant is one of sodium lignin sulfonate, neopelex or two kinds.
Further, the proportion >=1.28g/cm of described sodium lignin sulfonate3.
Present invention also offers a kind of preparation method of pellet balling-up binding agent, including：
The sludge crushing that sewage disposal is produced stirs, and sequentially adds electrofusion magnesia powder, desulfurizing agent, dispersant, finally
Stir and evenly mix after adding waterglass, obtain final product described binding agent；Wherein：Mud that described sewage disposal produces, electrofusion magnesia powder, de-
The weight of sulphur agent, waterglass and dispersant is than respectively 55%～75%, 1%～20%, 5%～20%, 5%～10% and
0～2%.
Further, the sludge moisture content that described sewage disposal produces is 60%-80%；Described desulfurizing agent be dolomite,
One of lime stone or two kinds；Described dispersant is one of sodium lignin sulfonate, neopelex or two kinds.
The one or more technical schemes providing in the embodiment of the present invention, at least have the following technical effect that or advantage：
1st, the pellet balling-up binding agent of the embodiment of the present invention, is primary raw material using the mud that sewage disposal produces,
By adding additive, mud is carried out with performance optimization, form a kind of new binding agent, this binding agent can replace bentonite, reduce
Burn residual rate, thus improve the grade of pellet.
2nd, the pellet balling-up binding agent of the embodiment of the present invention, this binding agent can effective for pellet balling-up, and
After shaping, pelletizing has enough intensity.
3rd, the pellet balling-up binding agent of the embodiment of the present invention, preparation method is simple, and at recycling sewage
The mud that reason produces, one, to reduce pellet production cost, increased the competitiveness of product in market；Two realize two making mud
The secondary utilization of resources, has reached the effect of recycling economy.
Specific embodiment
Embodiments provide one kind and can realize the resource reutilization of mud using active ingredient in mud, and
Pellet production cost, the pellet balling-up binding agent of raising pelletizing grade can be reduced；This binding agent can replace bentonite to exist
Use in pellet, so that Iron concentrate ore deposit is effectively molded, and after shaping, pelletizing has enough intensity, improves the grade of pellet,
Reduce production cost.
For achieving the above object, embodiments provide a kind of pellet balling-up binding agent, according to weight ratio, institute
State binding agent and comprise the mud, 1%～20% electrofusion magnesia powder, 5%～20% that 55%～75% sewage disposal produces
Desulfurizing agent and 5%～10% waterglass.
In the embodiment of the present invention, the sludge moisture content that described sewage disposal produces is 60%-80%.Scientific research both at home and abroad at present
The bottleneck problem of the Treatment of Sludge that worker generally acknowledges is it is simply that the big problem of sludge moisture content.Moisture in mud is broadly divided into four
Big class, six groups.Wherein four big class mainly include Interstitial Water, surface water, intermediary water and combine water, will be in conjunction with moisture in six groups
For chemical water and the crystallization water, also intermediary water can be divided into complexing water and weak binding water simultaneously.Due to there is substantial amounts of knot in mud
Heshui, intermediary water and surface water, sludge drying dehydration problem always perplexs a No.1 difficult problem for current researcher.Will be thoroughly
Break away from impact and the restriction of this class water, the method being necessary for the method even mechanical force and chemical using chemistry, mud is entered
Row modification.The present invention is modified to mud processing by adding additive, and each component interphase interaction forms the present invention
Binding agent.
In the embodiment of the present invention, the granularity≤0.1mm of described electrofusion magnesia powder.Granularity is excessive to be unfavorable for mixing, thus shadow
Ring Binder Properties, undersized can increase cost.
In the embodiment of the present invention, described desulfurizing agent is one of dolomite, lime stone or two kinds.
Wherein, the granularity of described dolomite and lime stone all≤0.1mm.Granularity is excessive to be unfavorable for mixing, thus impact is viscous
Knot agent performance, undersized can increase cost.
In the embodiment of the present invention, the modulus of described 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 reach optimal adhesive effect.
Further, the binding agent of the embodiment of the present invention also comprises dispersant, its weight ratio≤2%.Described dispersant is
One of sodium lignin sulfonate, neopelex or two kinds.
Wherein, the proportion >=1.28g/cm of described 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 based on following principle：
The mud that sewage disposal produces：Attachment function carrier is provided, adjusts basicity simultaneously, in addition in mud, contain oxidation
Iron, also can lift pelletizing grade.In mud, main component includes organic matter, SiO2、CaO、MgO、Fe2O3、Al2O3And soluble salt.
Electrofusion magnesia powder：It is mainly the acid-base value of regulating system, meanwhile, the addition of magnesia powder contributes to lifting the strong of green-ball
Degree.Its consumption is according to CaO and SiO in mud2Content determine, be mainly used in the acid-base value of regulating system, that is, CaO and
SiO2Ratio.Its addition is crossed multisystem alkalescence and is strengthened, and the very few systemic acidity of addition is too strong, all affects Binder Properties.
Dolomite and lime stone：Primarily serve desulfidation, meet water exothermic heat of reaction simultaneously, each component of binding agent can be promoted
Dispersion.Its consumption excessively can increase cost, also affects the composition (referring mainly to CaO) of system, and consumption is very few not to have desulfurization work
With.
Waterglass：Act primarily as cementation, effectively mineral powder granular is bonded together formation some strength, realizes pelletizing
Function.Its consumption excessively can increase cost, very few does not have cementation.
Sodium lignin sulfonate and neopelex：Act primarily as peptizaiton, reduce surface tension, promotion is various to be had
Effect dispersion in system for the composition.Its consumption excessively easily foams, and makes slurries retrogradation, very few does not have peptizaiton.
The content of each component all needs through well-designed, configuration above, and the embodiment of the present invention passes through each component of strict control
Content, using in pelletizing shaping, the various performance parameters of pelletizing are all preferable for the binding agent of configuration.
By the above as can be seen that it is primary raw material that the embodiment of the present invention adopts the mud that sewage disposal produces, 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 mud, forms a kind of new binding agent, this binding agent can replace bentonite, effective for ball
After nodulizing balling-up, and shaping, pelletizing has enough intensity, improves the grade of pellet.Reduce pellet production cost, real
Show the resource reutilization of mud.
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：
The sludge crushing that sewage disposal is produced stirs, and sequentially adds electrofusion magnesia powder, desulfurizing agent, dispersant, finally
Stir and evenly mix after adding waterglass, obtain final product described binding agent；Wherein：Mud that described sewage disposal produces, electrofusion magnesia powder, de-
The weight of sulphur agent, waterglass and dispersant is than respectively 55%～75%, 1%～20%, 5%～20%, 5%～10% and
0～2%.
Wherein, the sludge moisture content that described sewage disposal produces is 60%-80%.Described desulfurizing agent is dolomite, lime
One of stone or two kinds.Described dispersant is one of sodium lignin sulfonate, neopelex or two kinds.
For a more detailed description to the present invention by the following examples.These embodiments are only optimal embodiment party to the present invention
The description of formula, does not have any restriction to the scope of the present invention.
The mud that the mud that following examples are adopted produces for Wuhan Iron and Steel Plant Sewage Plant.Its main chemical compositions content is shown in Table 1,
But it is not limited to the mud of Wuhan Iron and Steel Plant in specific implementation process, can be adapted between different mud by the content of suitable adjustment additive
Component difference.
Table 1 mud main chemical compositions
| Composition | Organic matter | SiO2 | CaO | MgO | Fe2O3 | Al2O3 | Soluble salt |
| Weight portion | 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 this 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 is 1.8, and the proportion of sodium lignin sulfonate is 1.3.
This binding agent preparation process is：Mud is placed in mixer broken stirring, sequentially adds electrofusion magnesia powder, white
Marble and lime stone, sodium lignin sulfonate and neopelex, stir and evenly mix after being eventually adding waterglass, slurrying is treated
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 this 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 is 1.8, and the proportion of sodium lignin sulfonate is 1.3.
This binding agent preparation process is：Mud is placed in mixer broken stirring, sequentially adds electrofusion magnesia powder, white
Marble and lime stone, sodium lignin sulfonate, stir and evenly mix after being eventually adding waterglass, slurrying is stand-by.
Embodiment 3
Sewage plant sludge 75%
Electrofusion magnesia powder 1%
Dolomite 13%
Waterglass 10%
Sodium lignin sulfonate 0.5%
Neopelex 0.5%
In this 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.
This binding agent preparation process is：Mud is placed in mixer broken stirring, sequentially adds electrofusion magnesia powder, white
Marble, sodium lignin sulfonate and neopelex, stir and evenly mix 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 this 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 is 1.5, and the proportion of sodium lignin sulfonate is 1.3.
This binding agent preparation process is：Mud is placed in mixer broken stirring, sequentially adds electrofusion magnesia powder, stone
Lime stone, neopelex, stir and evenly mix 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 this 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.
This binding agent preparation process is：Mud is placed in mixer broken stirring, sequentially adds electrofusion magnesia powder, white
Marble and lime stone, neopelex, stir and evenly mix after being eventually adding waterglass, slurrying is stand-by.
Embodiment 6
Sewage plant sludge 70%
Electrofusion magnesia powder 6%
Dolomite 8%
Lime stone 8%
Waterglass 8%
In this 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.
This binding agent preparation process is：Mud is placed in mixer broken stirring, sequentially adds electrofusion magnesia powder, white
Marble and lime stone, stir and evenly mix after being eventually adding waterglass, slurrying is stand-by.Application examples
The use of Iron concentrate ore deposit is raw material, the binding agent adding the preparation of embodiment of the present invention 1-6 carries out dispensing, adds after mixing
Pelletizing in pelletizer, for the shaping of Iron concentrate ore deposit, binding agent mixed ratio is 8%.Respectively the binding agent in embodiment 1-6 is given birth to
The green pellets producing and roasting ball carry out performance detection, the pelletizing that binding agent in Application Example 1-6 produces and application bentonite
The performance parameter of the pelletizing producing contrasts referring to table 1.
Table 1 pellet characteristics parameter comparison
As can be seen from Table 1, the green-ball Falling strength of the pellet being produced using the binding agent of the embodiment of the present invention, pelletizing
Compression strength, preheated pellets voidage and pelletizing grade all do, using bentonite, the pellet that binding agent produced than the same period to be had
Improved.
The mud that the binding agent of the present invention is produced with sewage disposal is as primary raw material it is achieved that the recycling of resource；Replace
Bentonite, as the binding agent of pelletizing, improves the grade of pellet, decreases the consumption to bentonite resource, reduces production
Cost.In addition, this binding agent preparation method, simply it is easy to industrialization, has broad application prospects.
It should be noted last that, above specific embodiment only in order to technical scheme to be described and unrestricted,
Although being described in detail to the present invention 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, without deviating from the spirit and scope of technical solution of the present invention, it all should be covered
In the middle of scope of the presently claimed invention.
Claims (10)
1. a kind of pellet balling-up binding agent is it is characterised in that according to weight ratio, described binding agent comprises 55%～75%
The water glass of the mud of sewage disposal generation, 1%～20% electrofusion magnesia powder, 5%～20% desulfurizing agent and 5%～10%
Glass.
2. pellet balling-up binding agent as claimed in claim 1 is it is characterised in that the mud that described sewage disposal produces contains
The water yield is 60%-80%.
3. pellet balling-up binding agent as claimed in claim 1 it is characterised in that described electrofusion magnesia powder granularity≤
0.1mm.
4. pellet balling-up binding agent as claimed in claim 1 it is characterised in that described desulfurizing agent be dolomite, lime
One of stone or two kinds；The granularity of described dolomite and lime stone all≤0.1mm.
5. pellet balling-up binding agent as claimed in claim 1 it is characterised in that described waterglass modulus be 1.5～
2.
6. the pellet balling-up binding agent as described in one of claim 1-5 is it is characterised in that described binding agent also comprises point
Powder, its weight ratio≤2%.
7. pellet balling-up binding agent as claimed in claim 6 is it is characterised in that described dispersant is lignin sulfonic acid
One of sodium, neopelex or two kinds.
8. pellet balling-up binding agent as claimed in claim 7 it is characterised in that described sodium lignin sulfonate proportion >=
1.28g/cm3.
9. a kind of preparation method of pellet balling-up binding agent is it is characterised in that include：
The sludge crushing that sewage disposal is produced stirs, and sequentially adds electrofusion magnesia powder, desulfurizing agent, dispersant, is eventually adding
Stir and evenly mix after waterglass, obtain final product described binding agent；Wherein：The mud of described sewage disposal generation, electrofusion magnesia powder, desulfurization
The weight ratio respectively 55%～75%, 1%～20%, 5%～20%, 5%～10% and 0 of agent, waterglass and dispersant
～2%.
10. the preparation method of pellet balling-up binding agent as claimed in claim 9 is it is characterised in that described sewage disposal
The sludge moisture content producing is 60%-80%；Described desulfurizing agent is one of dolomite, lime stone or two kinds；Described dispersion
Agent is one of sodium lignin sulfonate, neopelex or two kinds.
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| CN110699543A (en) * | 2019-11-22 | 2020-01-17 | 中南大学 | Method for preparing iron ore sintered pellet binder by using steel oily sludge, binder and application |
| CN111500857A (en) * | 2020-04-15 | 2020-08-07 | 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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| CN111500857A (en) * | 2020-04-15 | 2020-08-07 | 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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| Publication number | Publication date |
|---|---|
| CN106399678B (en) | 2018-02-23 |
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