CN106544499B - A kind of composite assistant and its preparation method and application - Google Patents
A kind of composite assistant and its preparation method and application Download PDFInfo
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Abstract
The present invention relates to sefstromite concentrate production pellet fields, specifically provide a kind of composite assistant, which contains：Ig 1 15 weight %, SiO21 10 weight %, Al2O30.1 15 weight %, Fe2O350 90 weight %, CaO 0.1 5 weight %, TiO215 weight %；And a kind of method preparing composite assistant of the present invention, this method include：It is kneaded after organic bond, dispersant, optional mineralizer and optional additive are mixed；With application of the composite assistant of the present invention in sefstromite concentrate produces pellet.The composite assistant of the present invention overcomes does the defect that pellet Iron grade caused by bonding agent loses using bentonite, and can increase the utilization rate of low-grade iron ore concentrate, reduces pellet production cost, has significant economic benefit.
Description
Technical field
The present invention relates to a kind of composite assistants and a kind of preparation method of composite assistant to be produced in sefstromite concentrate with it
Application in pellet.
Background technology
Iron ore pellets are a kind of agglomeration of important granule iron concentrate.The sefstromite concentrate of Panzhihua Region is due to Iron grade
Low, the iron ore concentrate selected is -200 mesh fine powders, could enter blast furnace process after must using disc granulation.The pelletizing of Panzhihua Region
About 10,000,000 tons/year of yield, is widely used bentonite as bonding agent.Bonding agent addition regards raw material and process condition difference,
Generally 1.7-2.3% etc., the excessive impurity that introduces can reduce the TFe grades of pelletizing, for the TFe product for ensureing into stove pelletizing
Position, using high grade iron concentrate as the large percentage of raw materials for production, thereby increases production cost.
Invention content
The purpose of the present invention is to provide one kind ensureing ball under the premise of not increasing high grade iron concentrate usage amount
The Iron grade of nodulizing improves pellet Iron grade and function admirable, low-cost composite assistant.
To realize foregoing purpose, according to the first aspect of the invention, the present invention provides a kind of composite assistant, this is compound to help
Agent contains：Ig 1-15 weight %, SiO21-10 weight %, Al2O30.1-15 weight %, Fe2O350-90 weight %, CaO
0.1-5 weight %, TiO21-5 weight %.
According to the second aspect of the invention, the present invention provides a kind of method preparing composite assistant of the present invention,
This method includes：It is kneaded after organic bond, dispersant, optional mineralizer and optional additive are mixed.
According to the third aspect of the invention we, the present invention provides composite assistants of the present invention produces in sefstromite concentrate
Application in pellet.
The composite assistant of the present invention overcomes does the defect that pellet Iron grade caused by bonding agent loses using bentonite,
And the utilization rate of low-grade iron ore concentrate can be increased, pellet production cost is reduced, there is significant economic benefit.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
As previously mentioned, the present invention provides a kind of composite assistant, which contains：Ig 1-15 weight %, SiO2
1-10 weight %, Al2O30.1-15 weight %, Fe2O350-90 weight %, CaO 0.1-5 weight %, TiO21-5 weight %.
Composite assistant according to the present invention, the preferably composite assistant contain：Ig 1.5-6 weight %, SiO24-9 weights
Measure %, Al2O34-12 weight %, Fe2O360-80 weight %, CaO 0.2-0.6 weight %, TiO22-4 weight %.Before having
The composite assistant of composition is stated, pellet iron product can be further increased under the premise of not increasing high grade iron concentrate usage amount
Position.
In the present invention, Ig refers to igloss, alternatively referred to as scaling loss.
Composite assistant according to the present invention, other than mentioned component and content, remaining is organic matter.
Composite assistant according to the present invention, viscosity >=15.00MPas of the preferably described composite assistant, preferably 16-
18MPa·s。
Composite assistant according to the present invention, the preferably content of TFe are 45-60 weight %.
The purpose of the present invention may be implemented in composite assistant with aforementioned component of the present invention, and the present invention is to preparation method
Without particular/special requirement, for the present invention, preferably composite assistant of the invention is prepared as follows：By organic bond, dispersant,
It is kneaded after optional mineralizer and the mixing of optional additive.
It is carried out as follows, according to the invention it is preferred to be kneaded：
It carries out first successively to be kneaded and the second mixing, wherein the first mixing and second is kneaded alternately, and is mixed with first
Refining terminates；Wherein, the rate that the second mixing is kneaded than first is high 100-250r/min.It is prepared according to preceding method compound
Auxiliary agent can further increase pellet Iron grade under the premise of not increasing high grade iron concentrate usage amount.
A kind of embodiment according to the present invention, if it is described first be kneaded and second be kneaded meet aforementioned claim can be real
The existing purpose of the present invention, for the present invention, the preferably second rate being kneaded is 200-300r/min；First be kneaded rate be
50-100r/min。
With the method for the invention it is preferred to which the second time being kneaded was 2-3min；First time being kneaded was 3-5min.
A kind of preferred embodiment according to the present invention, is preferably kneaded and carries out as follows：
(1) under the rate of 50-100r/min, first is kneaded 3-5min；
(2) and then under the rate of 200-300r/min, second is kneaded 2-3min；
(3) finally under the rate of 50-100r/min, first is kneaded 3-5min.
With the method for the invention it is preferred in terms of mixed raw material gross weight, the dosage of organic bond is 5-15 weights
% is measured, the dosage of dispersant is 75-95 weight %, and the dosage of mineralizer is 0-5 weight %, and the dosage of additive is 0-5 weights
Measure %；It is preferred that the dosage of organic bond is 5-15 weight %, the dosage of dispersant is 75-95 weight %, the dosage of mineralizer
Dosage for 2-5 weight %, additive is 2-5 weight %.
According to the method for the present invention, optional wider range of the type of the organic bond, for the present invention, preferably institute
The organic bond stated is SX type pulverulent water-soluble resins, for example, modified unsaturated polyacrylate resin, also referred to as water-soluble
Unsaturated polyacrylate resin, one kind of aquosity ultraviolet light (UV) solidified resin.
With the method for the invention it is preferred to which the physical and chemical index of the organic bond includes：Granularity≤(- 325) purpose contains
Amount is more than 90 weight %, preferably 91-94 weight %；Viscosity number >=36MPas, preferably 36-40MPas；Igloss 30-
35 weight %, SiO2Content be 32-34 weight %, Al2O3Content be 31-33 weight %, CaO content be 2-3 weight
Measure %.
According to the present invention, in addition to the components described above, remaining is resin to the organic bond, for example, unsaturated polypropylene
Acid ester resin.
A preferred embodiment of the invention, the organic bond is SX type pulverulent water-soluble resins, excellent
It is modified unsaturated polyacrylate resin to select SX type pulverulent water-soluble resins, and physical and chemical index includes：Granularity≤(- 325) purpose
Content is more than 90 weight %, preferably 91-94 weight %；Viscosity number >=36MPas, preferably 36-40MPas；Igloss
30-35 weight %, SiO2Content be 32-34 weight %, Al2O3Content be 31-33 weight %, CaO content be 2-3 weight
% is measured, remaining is unsaturated polyacrylate resin, and production meets：The requirement of GB/T24147-2009.
According to the method for the present invention, optional wider range of the type of the dispersant, for the present invention, preferably described
Dispersant is the residue calcined troilite and prepare sulfuric acid, and the physical and chemical index of the more preferably dispersant includes：The content of TFe is
63-65 weight %, TiO2Content be 3.5-4 weight %, Al2O3Content be 3-3.5 weight %, SiO2Content be 1.5-2
The content of weight %, CaO are 0.2-0.5 weight %, and granularity≤(- 180) purpose content is more than 95 weight %, preferably 95-
97 weight %.
According to the method for the present invention, optional wider range of the type of the mineralizer, for the present invention, preferably described
Mineralizer is one or more in calgon, sodium tripolyphosphate, soda ash and feldspar；Preferably calgon, trimerization
At least two in sodium phosphate, soda ash and feldspar, using two kinds of composite mineralizers, can be used not increasing high grade iron concentrate
Pellet Iron grade is further increased under the premise of amount.
According to the method for the present invention, optional wider range of the type of the additive, for the present invention, preferably described
Additive is one or more in clay, bentonite, silicon powder and white clay；Preferably clay, bentonite, silicon powder and white clay
In at least two, can be under the premise of not increasing high grade iron concentrate usage amount further using two kinds of compound additives
Improve pellet Iron grade.
As previously mentioned, the answering in sefstromite concentrate produces pellet the present invention provides composite assistant of the present invention
With.
The composite assistant of the present invention produces pellet for sefstromite concentrate, overcomes and makees bonding agent using bentonite and cause
The loss of pellet Iron grade defect, and the utilization rate of low-grade iron ore concentrate can be increased, reduce pellet production cost, have
Significant economic benefit.
The present invention is described in detail by the following examples, but the present invention is not limited to this.
In the present invention, the examination criteria or detection method of each physical and chemical parameter are as follows：
TFe content detection standards are：QJ/YC5.064-2007；
SiO2Content detection standard is：GB/T6900.2-1986；
Al2O3Content detection standard is：GB/T6900-2006；
Fe2O3Content detection standard is：GB/T6900-2006；
TiO2Content detection standard is：GB/T6900-2006；
CaO content examination criteria is：GB/T6900-2006；
Content of MgO examination criteria is：GB/T6900-2006；
Igloss Indexs measure standard is：GB/T6900-2006；
Granularity Detection standard is：QJ/YC5.061-2007；
Viscosity measurements standard is：QB/HCTT025-2012.
Embodiment 1
Organic bond 5wt% will be contained, the mixture of mineralizer 2wt%, additive 2wt%, dispersant 91wt% exist
After being kneaded 3min on kolleroang with 60r/min rate low speed, 3min is kneaded with 200r/min rate high speeds, then with 60r/min speed
Rate low speed is kneaded 3min dischargings, and the physical and chemical index of obtained composite assistant is shown in Table 1.
Wherein, the organic bond is SX water-soluble resins, and physical and chemical index is：The mesh ratio of granularity≤- 325
93wt%, viscosity number 38MPas, igloss 33.71wt%, SiO2Content is 32.59wt%, Al2O3Content is 31.35wt%,
CaO content is 2.35wt%.
Wherein, the mineralizer is：The mixture of calgon and soda ash, mixed weight ratio are 1:1, six inclined phosphorus
Sour sodium meets corresponding index request in GB/T1890-2005, and soda ash meets corresponding index request in GB210.1-2004.
Wherein, the additive is：Clay and bentonitic mixture, mixed weight ratio are 1:1, wherein clay
Physical and chemical index is：Igloss：12.15wt%, SiO2Content is 48.24wt%, Al2O3Content is 21.18wt%, Fe2O3Content is
1.20wt%, CaO content 0.38wt%, TiO2Content is 0.89wt%；Bentonite physical and chemical index is：Igloss：9.37wt%,
SiO2Content is 68.78wt%, Al2O3Content is 14.82wt%, Fe2O3Content is 4.84wt%, CaO content 0.55wt%,
Content of MgO is 1.18wt%, TiO2Content is 0.86wt%.
Wherein, the dispersant is the residue calcined troilite and prepare sulfuric acid, and physical and chemical index is：TFe contents are
64.13wt%, TiO2Content is 3.78wt%, Al2O3Content is 3.21wt%, SiO2Content is 1.89wt%, and CaO content is
0.23wt%, the mesh ratio 96wt% of granularity≤- 180.
Embodiment 2
Organic bond 10wt% will be contained, the mixture of mineralizer 3wt%, additive 3wt%, dispersant 84wt% exist
After being kneaded 4min on kolleroang with 80r/min rate low speed, 3min is kneaded with 250r/min rate high speeds, then with 50r/min speed
Rate low speed is kneaded 3min dischargings, and the physical and chemical index of obtained composite assistant is shown in Table 1.
Wherein, the organic bond is SX water-soluble resins, and physical and chemical index is：The mesh ratio of granularity≤- 325
93wt%, viscosity number 38MPa.s, igloss 33.71wt%, SiO2Content is 32.59wt%, Al2O3Content is 31.35wt%,
CaO content is 2.35wt%.
Wherein, the mineralizer is：The mixture of sodium tripolyphosphate and soda ash, mixed weight ratio are 1:1, trimerization phosphorus
Sour sodium meets corresponding index request in GB/T9983-2004, and soda ash meets corresponding index request in GB210.1-2004.
Wherein, the additive is：White clay and bentonitic mixture, mixed weight ratio are 1:1, wherein white clay is managed
Changing index is：Igloss：12.56wt%, SiO2Content is 48.21wt%, Al2O3Content is 35.15wt%, Fe2O3Content is
0.73wt%, CaO content 0.31wt%, content of MgO 0.36wt%, TiO2Content is 2.01wt%；Bentonite physics and chemistry refers to
It is designated as：Igloss：9.37wt%, SiO2Content is 68.78wt%, Al2O3Content is 14.82wt%, Fe2O3Content is
4.84wt%, CaO content 0.55wt%, content of MgO 1.18wt%, TiO2Content is 0.86wt%.
Wherein, the dispersant is the residue calcined troilite and prepare sulfuric acid, and physical and chemical index is：TFe contents are
64.13wt%, TiO2Content is 3.78wt%, Al2O3Content is 3.21wt%, SiO2Content is 1.89wt%, and CaO content is
0.23wt%, the mesh ratio 96wt% of granularity≤- 180.
Embodiment 3
Organic bond 15wt% will be contained, the mixture of mineralizer 5wt%, additive 5wt%, dispersant 75wt% exist
After being kneaded 5min on kolleroang with 100r/min rate low speed, 2min is kneaded with 300r/min rate high speeds, then with 50r/min speed
Rate low speed is kneaded 3min dischargings, and the physical and chemical index of obtained composite assistant is shown in Table 1.
Wherein, the organic bond is SX water-soluble resins, and physical and chemical index is：The mesh ratio of granularity≤- 325
93wt%, viscosity number 38MPa.s, igloss 33.71wt%, SiO2Content is 32.59wt%, Al2O3Content is 31.35wt%,
CaO content is 2.35wt%.
Wherein, the mineralizer is：The mixture of soda ash and sodium tripolyphosphate, mixed weight ratio are 3:2, trimerization phosphorus
Sour sodium meets corresponding index request in GB/T9983-2004, and soda ash meets corresponding index request in GB210.1-2004.
Wherein, the additive is：The mixture of bentonite and silicon powder, mixed weight ratio are 2:1, wherein swelling
Native physical and chemical index is：Igloss 9.37wt%, SiO2Content is 68.78wt%, Al2O3Content is 14.82wt%, Fe2O3Content is
4.84wt%, CaO content 0.55wt%, content of MgO 1.18wt%, TiO2Content is 0.86wt%；Silicon powder physics and chemistry refers to
It is designated as：Igloss 0.81wt%, SiO2Content is 93.65wt%, Al2O3Content is 0.76wt%, Fe2O3Content is 0.52wt%,
CaO content is 0.31wt%, content of MgO 0.53wt%.
Wherein, the dispersant is the residue calcined troilite and prepare sulfuric acid, and physical and chemical index is：TFe contents are
64.13wt%, TiO2Content is 3.78wt%, Al2O3Content is 3.21wt%, SiO2Content is 1.89wt%, and CaO content is
0.23wt%, the mesh ratio 96wt% of granularity≤- 180.
1 composite assistant physical and chemical index of table
| Title | Ig/wt% | SiO2/ wt% | Al2O3/ wt% | Fe2O3Wt/% | CaO/wt% | TiO2/ wt% | TFe/wt% | Viscosity/MPas |
| Embodiment 1 | 1.90 | 4.31 | 4.57 | 72.63 | 0.32 | 3.44 | 50.84 | 16.20 |
| Embodiment 2 | 3.75 | 6.36 | 6.32 | 70.28 | 0.29 | 3.38 | 49.76 | 16.60 |
| Embodiment 3 | 5.34 | 8.28 | 10.25 | 72.89 | 0.51 | 2.76 | 51.05 | 17.50 |
Test case
Pellet is prepared using the composite assistant of embodiment 1-3.
By composite assistant and sefstromite concentrate, (TFe contents are 53.81wt%, SiO2Content is 5.13wt%, Al2O3Content
For 4.97wt%, CaO content 0.67wt%, content of MgO 2.47wt%, TiO2Content is 12.35wt%, granularity≤- 180
Mesh ratio 85wt%) it is uniformly mixed (feed postition of composite assistant is additional, addition 1.2wt%), a diameter of
It is granulated on 1000mm disc balling machines, disc balling machine inclination angle is 45 °, rotating speed 17r/min, and control moisture is in 7wt%
Carry out pelletizing.Green-ball Testing index is as follows, the results are shown in Table 2：
1, drop number：Green-ball is 500mm from vertical height, is fallen on the steel plate of thickness 3mm any surface finish, when crackle is big
Terminate when the 1/3 of bulb diameter, records drop number.
2, green-ball pressure resistance：Green-ball is put on the electronic balance that sensibility reciprocal is 1g, the ruler pressure ball of bulb diameter is more than with width,
The full-scale reading before ball fractured is recorded, 100g is accurate to.
3,600 DEG C of intensity of medium temperature：Pelletizing is put on the electronic balance that sensibility reciprocal is 10g, is more than the thin of bulb diameter with width
Steel disc pressure ball, the full-scale reading before record rupture, is accurate to 100g.
4, the anti-spalling (cracking breakout) for investigating pelletizing in 600 DEG C of Muffle furnace, keeps the temperature pelletizing as temperature
It is taken out after 30min, observation has the ratio that crack number accounts for total quantity.
5, tumbler index：Using national standard《The assay method of sinter and pellet-drum strength》, standard No.：GB8209-
87 detection method is detected.
2 pellet physical and chemical index of table compares
It can be seen that by the result of table 2：The pelletizing that the embodiment of composite assistant is made, green-ball drop number and intensity is added
It increases, ensure that pelletizing has bad luck the adverse effect that drop is brought in production process；Medium temperature maintains original intensity, in drying
It is unlikely to occur squeezing broken situation in roasting process, is significantly improved from tumbler index in terms of the situation after roasting, ensure that transport way
In be not destroyed, should not smooth operation of furnace be conducive to by dusting in blast furnace process, using the present invention composite assistant, even if not
By increasing the grade of sefstromite concentrate, pellet TFe contents are also improved, iron thus can directly be brought to sample increased price
Income.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail can carry out a variety of simple variants to technical scheme of the present invention within the scope of the technical concept of the present invention, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (9)
1. a kind of preparation method of composite assistant, which is characterized in that this method includes：By organic bond, dispersant, mineralizer
It is kneaded after being mixed with additive, composite assistant is made, which contains：Ig 1-15 weight %, SiO21-10 weights
Measure %, Al2O30.1-15 weight %, Fe2O350-90 weight %, CaO 0.1-5 weight %, TiO21-5 weight %；
Wherein, the dosage of organic bond is 5-15 weight %, and the dosage of dispersant is 75-95 weight %, the dosage of mineralizer
Dosage for 2-5 weight %, additive is 2-5 weight %；The mineralizer is calgon, sodium tripolyphosphate, soda ash
It is one or more in clay, bentonite, silicon powder and white clay with one or more in feldspar, described additives；
The organic bond is SX type pulverulent water-soluble resinoid bonds, and physical and chemical index includes：Granularity≤(- 325) purpose
Content is more than 90 weight %, viscosity number >=36MPas, igloss 30-35 weight %, SiO2Content be 32-34 weight %,
Al2O3Content be the content of 31-33 weight %, CaO be 2-3 weight %, wherein SX type pulverulent water-soluble resinoid bonds are
Water-soluble unsaturation polyacrylate resin；
The dispersant is the residue calcined troilite and prepare sulfuric acid, and physical and chemical index includes：The content of TFe is 63-65 weights
Measure %, TiO2Content be 3.5-4 weight %, Al2O3Content be 3-3.5 weight %, SiO2Content be 1.5-2 weight %,
The content of CaO is 0.2-0.5 weight %, and granularity≤(- 180) purpose content is more than 95 weight %.
2. according to the method described in claim 1, the composite assistant contains：Ig 1.5-6 weight %, SiO24-9 weight %,
Al2O34-12 weight %, Fe2O360-80 weight %, CaO 0.2-0.6 weight %, TiO22-4 weight %.
3. method according to claim 1 or 2, wherein viscosity >=15MPas of the composite assistant；The content of TFe
For 45-60 weight %.
4. according to the method described in claim 3, wherein, the viscosity of the composite assistant is 16-18MPas.
5. according to the method described in claim 1, wherein, mixing carries out as follows：
It carries out first successively to be kneaded and the second mixing, wherein the first mixing and second is kneaded alternately, and with the first mixing knot
Beam；Wherein, the rate that the second mixing is kneaded than first is high 100-250r/min.
6. according to the method described in claim 5, wherein, the second rate being kneaded is 200-300r/min；First speed being kneaded
Rate is 50-100r/min.
7. according to the method described in claim 1, wherein, mixing carries out as follows：
(1) under the rate of 50-100r/min, first is kneaded 3-5min；
(2) and then under the rate of 200-300r/min, second is kneaded 2-3min；
(3) finally under the rate of 50-100r/min, first is kneaded 3-5min.
8. according to the method described in claim 1, wherein, the mineralizer be calgon, sodium tripolyphosphate, soda ash and
At least two in feldspar.
9. according to the method described in claim 1, wherein, the additive is in clay, bentonite, silicon powder and white clay
At least two.
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| CN103146915A (en) * | 2013-03-01 | 2013-06-12 | 莱芜钢铁集团有限公司 | Titaniferous red mud compound binder and preparation method thereof |
| CN103468943A (en) * | 2013-09-27 | 2013-12-25 | 中信大锰（钦州）新材料有限公司 | Cold-pressing pallet production process of chromium fine ore |
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