CN105441668A - Sintering method for sea sand vanadium-titanium-iron concentrate - Google Patents
Sintering method for sea sand vanadium-titanium-iron concentrate Download PDFInfo
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- CN105441668A CN105441668A CN201510836759.8A CN201510836759A CN105441668A CN 105441668 A CN105441668 A CN 105441668A CN 201510836759 A CN201510836759 A CN 201510836759A CN 105441668 A CN105441668 A CN 105441668A
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- sintering
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- sefstromite concentrate
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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
- C22B1/16—Sintering; Agglomerating
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Abstract
The invention belongs to the field of metal smelting, and particularly relates to a sintering method for sea sand vanadium-titanium-iron concentrate. The technical problems that the sea sand vanadium-titanium-iron concentrate belongs to high titanium type schreyerite, the sintering performance is poor, the yield of sinter, the utilization coefficient and indexes like the drum index are poor compared with indexes of common ore are solved. According to the scheme, the sintering method of the sea sand vanadium-titanium-iron concentrate comprises the following steps that firstly, in the even mixing process before sintering, a calcium manganate aqueous solution is added into the sinter, and a mixture is prepared; and b, ignition is carried out, the mixture is sintered to obtain the sinter. The method is easy and convenient to operate, practical and suitable for industrialized production.
Description
Technical field
The invention belongs to Metal smelting field, be specifically related to the sintering method of extra large sand sefstromite concentrate.
Background technology
Sea sand sefstromite concentrate belongs to high-titanium type vanadium titanium ore, and sintering character is poor, and the more common ore of index such as yield rate, utilization coefficient, tumbler index of its agglomerate is poor.
Conventional is sintering agar diffusion method at present, and its experiment condition is: sinter new doses 70kg, and add water mixing at twice, wherein one does time as 4min, and two do time as 4min, and in compound, the mass percent of water is 7.5% ± 0.2%; When knot burns, the thickness of the bed of material is 700mm, and ignition time is 2min, and ignition temperature is 1050 ± 50 DEG C.
The experimental procedure of sintered cup is: 1) carry out weighing according to sintering proportioning, alleged virgin material and return mine (agglomerate of finger granularity≤5 of returning mine) are added one mixed in; 2) open one mix and start to add water, mixing 4min in making material mixed; 3) material is poured into two mixed in, open two and mix and add a small amount of water, after mixing 4min, take out compound; 4) weigh the weight of compound, and mixture moisture and granularity are surveyed in sampling; 5) in sintered cup, add 2.5kg grate-layer material (granularity is the agglomerate of 10 ~ 16mm), and add compound and reach 700mm to the bed of material.Wherein, that allocates into returns mine as 30% of compound.6) light a fire after 2min, wait for that sintering process finishes, record related data.
Summary of the invention
The technical problem to be solved in the present invention is that extra large sand sefstromite concentrate sintering character is poor, yield rate and utilization coefficient lower.
Invent the sintering method that the scheme solved the problems of the technologies described above is to provide a kind of extra large sand sefstromite concentrate, comprise the following steps:
In a, blending process before sintering, the calcium permanganate aqueous solution is joined in sintered material, obtained compound;
B, igniting, sinter mixture, obtains agglomerate.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, the blending process described in step a is the mixing that adds water at twice, and wherein one do time as 4min, two do time as 4min.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, the sintered material described in step a be with mass percent be 50.5% ± 3% extra large sand sefstromite concentrate, 28.7% ± 3% hair ore deposit, the blast-furnace dust of 3% ± 0.5%, the Wingdale of 12% and 5.80% clean fine coal composition.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, in the calcium permanganate aqueous solution described in step a, purity >=95% of calcium permanganate.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, in the calcium permanganate aqueous solution described in step a, the add-on of calcium permanganate is less than or equal to 1% of sintered material quality.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, in the calcium permanganate aqueous solution described in step a, the mass percent of water is 7.5% ± 0.2% of mixture quality.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, the time remaining 2min lighted a fire described in step b, the temperature of igniting is 1050 ± 50 DEG C.After described igniting 2min, the accumulation of heat of sintered material reaction is relied on to sinter.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, the terminal sintered described in step b is the moment starting after spent air temperture arrives maximum value to reduce.The gas produced when described waste gas is sintering.
The invention adds the calcium permanganate aqueous solution to replace water inside sinter mixture, in sintering process after firing, calcium permanganate can be decomposed into Manganse Dioxide, calcium oxide and oxygen, thus the required oxygen that burns in increase sintering process, and the calcium oxide decomposed out can improve sinter basicity, under the alkalinity levels of the present invention's batching, improve the quality that basicity also can improve agglomerate, improve sintering technology and economic indicator.Method provided by the invention is easy to operation, is suitable for suitability for industrialized production.
Embodiment
The sintering method of sea sand sefstromite concentrate, comprises the following steps:
In a, blending process before sintering, the calcium permanganate aqueous solution is joined in sintered material, obtained compound;
B, igniting, sinter mixture, obtains agglomerate.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, the blending process described in step a is the mixing that adds water at twice, and wherein one do time as 4min, two do time as 4min.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, the sintered material described in step a be with mass percent be 50.5% ± 3% extra large sand sefstromite concentrate, 28.7% ± 3% hair ore deposit, the blast-furnace dust of 3% ± 0.5%, the Wingdale of 12% and 5.80% clean fine coal composition.
The chemical composition of described extra large sand sefstromite concentrate by percentage to the quality TFe be 58.22% ± 0.5%, TiO
2be 12.64% ± 0.53%, V
2o
5be 0.574% ± 0.05%, CaO be 0.36% ± 0.05%, MgO is 2.32% ± 0.1%, Al
2o
3be 2.75% ± 0.2%, SiO
2be 0.73% ± 0.1%, P is 0.028% ± 0.005%, S is 0.02% ± 0.001%, all the other are impurity.Described TFe content is the mass percent of Fe element, by Fe
2o
3,the mass percent of the oxides-containing irons such as FeO is amounted to.
The main chemical compositions in described hair ore deposit is as shown in table 1:
The mass percentage (%) of table 1 mao ore deposit main chemical compositions
The main chemical compositions of described blast-furnace dust is as shown in table 2:
The mass percentage (%) of table 2 blast-furnace dust main chemical compositions
In the sintering method of above-mentioned extra large sand sefstromite concentrate, in the calcium permanganate aqueous solution described in step a, purity >=95% of calcium permanganate.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, in the calcium permanganate aqueous solution described in step a, the add-on of calcium permanganate is less than or equal to 1% of sintered material quality.Calcium permanganate degradation production is helpful to sintering process, if excessive use calcium permanganate can have an impact to sinter chemical composition.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, in the calcium permanganate aqueous solution described in step a, the mass percent of water is 7.5% ± 0.2% of mixture quality.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, the time remaining 2min lighted a fire described in step b, the temperature of igniting is 1050 ± 50 DEG C.After described igniting 2min, the accumulation of heat of sintered material reaction is relied on to sinter.
In the sintering method of above-mentioned extra large sand sefstromite concentrate, the terminal sintered described in step b is the moment starting after spent air temperture arrives maximum value to reduce.The gas produced when described waste gas is sintering, the mainly oxide gas of S and N.
The sintered material proportioning used in the embodiment of the present invention is as shown in table 3, and the extra large sand sefstromite concentrate main chemical compositions of use is as shown in table 4, and the hair ore deposit chemical composition of use is as shown in table 5, and the blast-furnace dust chemical composition of use is as shown in table 6.
Table 3 sintered material proportioning (%)
| Material | Sea sand sefstromite concentrate | Hair ore deposit | Blast-furnace dust | Wingdale | Clean fine coal |
| Proportioning | 50.5 | 28.7 | 3 | 12 | 5.80 |
Table 4 extra large sand sefstromite concentrate main chemical compositions (%)
| Composition | TFe | TiO 2 | V 2O 5 | CaO | MgO | Al 2O 3 | SiO 2 | P | S |
| Indonesia's sea sand | 58.22 | 12.64 | 0.574 | 0.36 | 2.32 | 2.75 | 0.73 | 0.028 | 0.02 |
Table 5 mao ore deposit chemical composition (%)
| Composition (%) | TFe | Fe 2O 3 | P | CaO | MgO | Al 2O 3 | SiO 2 | FeO | S |
| Hair ore deposit | 60 | 80.09 | 0.076 | 0.356 | 0.271 | 1.06 | 12.13 | 4.57 | 0.033 |
Table 6 blast-furnace dust chemical composition (%)
| Composition | TFe | TiO 2 | V 2O 5 | CaO | MgO | Al 2O 3 | SiO 2 | FeO | C | Ig |
| Blast-furnace dust | 42 | 3.6 | 0.224 | 6.3 | 1.61 | 2.42 | 6 | 8.5 | 15 | 14 |
Embodiment 1
Sintered material 70kg, divide two to add the calcium permanganate aqueous solution (calcium permanganate 350g, the mass percent of water is 7.5% ± 0.2% of mixture quality), wherein one do time as 4min, two do time as 4min.Mix rear igniting 2min, ignition temperature is 1050 ± 50 DEG C, when knot burns and starts to reduce to spent air temperture arrival maximum value, stops sintering, obtains knot and burn ore deposit.
Embodiment 2
Sintered material 70kg, add the calcium permanganate aqueous solution (calcium permanganate 700g, the mass percent of water is 7.5% ± 0.2% of mixture quality) at twice, wherein one do time as 4min, two do time as 4min.Mix rear igniting 2min, ignition temperature is 1050 ± 50 DEG C, when knot burns and starts to reduce to spent air temperture arrival maximum value, stops sintering, obtains knot and burn ore deposit.
Comparative example
Sintered material 70kg, return mine 21kg, and add water mixing at twice, makes the mass percent of water be 7.5% ± 0.2% of mixture quality, and wherein one do time as 4min, two do time as 4min.Mix rear igniting 2min, ignition temperature is 1050 ± 50 DEG C, when knot burns and starts to reduce to spent air temperture arrival maximum value, stops sintering, obtains knot and burn ore deposit.
The composition of the agglomerate that the embodiment of the present invention 1,2 and comparative example obtain is as shown in table 5.
Table 7 Sinter Component (%)
| TFe | FeO | SiO 2 | CaO | MgO | Al 2O 3 | V 2O 5 | TiO 2 | R | |
| Comparative example | 49.961 | 7.726 | 5.765 | 10.289 | 1.922 | 2.356 | 0.359 | 6.946 | 1.785 |
| Embodiment 1 | 49.966 | 7.727 | 5.759 | 10.312 | 1.894 | 2.355 | 0.358 | 6.941 | 1.791 |
| Embodiment 2 | 49.957 | 7.731 | 5.762 | 10.327 | 1.933 | 2.361 | 0.361 | 6.943 | 1.792 |
Table 8 sintering technology and economic indicator (%)
| Utilization coefficient [t/ (m 2·h)] | Tumbler index (%) | Yield rate (%) | |
| Comparative example | 1.275 | 72.3 | 70.2 |
| Embodiment 1 | 1.314 | 72.3 | 71.3 |
| Embodiment 2 | 1.327 | 72.5 | 71.8 |
The result of table 6 shows: use calcium permanganate solution to replace water to add in compound, little on Sinter Tumber Index impact, can effectively improve sintering utilization coefficient, and has certain effect to raising agglomerate yield rate.
Claims (6)
1. the sintering method of extra large sand sefstromite concentrate, comprises the following steps:
In a, blending process before sintering, the calcium permanganate aqueous solution is joined in sintered material, obtained compound;
B, igniting, sinter mixture, obtains agglomerate.
2. the sintering method of extra large sand sefstromite concentrate according to claim 1, is characterized in that: in the calcium permanganate aqueous solution described in step a, purity >=95% of calcium permanganate.
3. the sintering method of extra large sand sefstromite concentrate according to claim 1, is characterized in that: in the calcium permanganate aqueous solution described in step a, and the add-on of calcium permanganate is less than or equal to 1% of sintered material quality.
4. the sintering method of extra large sand sefstromite concentrate according to claim 1, is characterized in that: in the calcium permanganate aqueous solution described in step a, and the mass percent of water is 7.5% ± 0.2% of mixture quality.
5. the sintering method of extra large sand sefstromite concentrate according to claim 1, is characterized in that: the time remaining 2min lighted a fire described in step b, the temperature of igniting is 1050 ± 50 DEG C.
6. the sintering method of extra large sand sefstromite concentrate according to claim 1, is characterized in that: the terminal sintered described in step b is the moment starting after spent air temperture arrives maximum value to reduce; The gas produced when described waste gas is sintering.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106755674A (en) * | 2016-12-26 | 2017-05-31 | 盐城市联鑫钢铁有限公司 | A kind of method that utilization sea sand ore deposit produces vanadium titanium new material |
| CN107058891A (en) * | 2016-12-26 | 2017-08-18 | 盐城市联鑫钢铁有限公司 | A kind of method that utilization sea sand ore deposit produces high-strength anti-seismic building materials |
| CN107177790A (en) * | 2017-04-19 | 2017-09-19 | 广西盛隆冶金有限公司 | A kind of sea sand ore deposit and lateritic nickel ore high intensity cold agglomerated pellet preparation method |
| CN107254619A (en) * | 2017-04-19 | 2017-10-17 | 广西盛隆冶金有限公司 | A kind of method that sea sand ore deposit and lateritic nickel ore grandidierite obtain the nichrome of titanium containing vanadium |
| CN107254620A (en) * | 2017-04-19 | 2017-10-17 | 广西盛隆冶金有限公司 | One kind is using sea sand ore deposit and lateritic nickel ore production vanadium titanium nichrome technique |
| CN108193124A (en) * | 2017-12-29 | 2018-06-22 | 钢研晟华科技股份有限公司 | A kind of high-strength air corrosion-resistant steel muscle and preparation method thereof |
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| CN104862470A (en) * | 2015-05-13 | 2015-08-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for shortening pellet calcinating time |
| CN104911333A (en) * | 2015-05-13 | 2015-09-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Method raising roasting pellet oxidisability |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106755674A (en) * | 2016-12-26 | 2017-05-31 | 盐城市联鑫钢铁有限公司 | A kind of method that utilization sea sand ore deposit produces vanadium titanium new material |
| CN107058891A (en) * | 2016-12-26 | 2017-08-18 | 盐城市联鑫钢铁有限公司 | A kind of method that utilization sea sand ore deposit produces high-strength anti-seismic building materials |
| CN107177790A (en) * | 2017-04-19 | 2017-09-19 | 广西盛隆冶金有限公司 | A kind of sea sand ore deposit and lateritic nickel ore high intensity cold agglomerated pellet preparation method |
| CN107254619A (en) * | 2017-04-19 | 2017-10-17 | 广西盛隆冶金有限公司 | A kind of method that sea sand ore deposit and lateritic nickel ore grandidierite obtain the nichrome of titanium containing vanadium |
| CN107254620A (en) * | 2017-04-19 | 2017-10-17 | 广西盛隆冶金有限公司 | One kind is using sea sand ore deposit and lateritic nickel ore production vanadium titanium nichrome technique |
| CN108193124A (en) * | 2017-12-29 | 2018-06-22 | 钢研晟华科技股份有限公司 | A kind of high-strength air corrosion-resistant steel muscle and preparation method thereof |
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