CN103555974A - Method of producing high-titanium-iron alloy by virtue of aluminum-magnesium process - Google Patents
Method of producing high-titanium-iron alloy by virtue of aluminum-magnesium process Download PDFInfo
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- CN103555974A CN103555974A CN201310507100.9A CN201310507100A CN103555974A CN 103555974 A CN103555974 A CN 103555974A CN 201310507100 A CN201310507100 A CN 201310507100A CN 103555974 A CN103555974 A CN 103555974A
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Abstract
The invention belongs to the smelting field of a high-titanium-iron alloy, and specifically relates to a method of producing a high-titanium-iron alloy by virtue of an aluminum-magnesium process. The method provided by the invention can be used for solving the technical problems that the existing high-titanium-iron alloy smelting method is high in cost, low in efficiency and very high in residual oxygen amount and residual aluminum amount in the titanium-iron alloy. A scheme for solving the technical problem is to provide a method of producing a high-titanium-iron alloy by an aluminum-magnesium process. The method of producing the high-titanium-iron alloy by the aluminum-magnesium process comprises the following steps: uniformly mixing the following materials in parts by weight: 1 part of titanium concentrate, 2.3 parts of titanium slag, 1.73-1.93 parts of aluminum powder, 0.17-0.23 parts of magnesium powder, 0.27-0.37 parts of fluorite, 0.33-0.4 parts of lime and 0.8-3 parts of potassium chlorate; smelting by adopting an upper ignition method to obtain the high-titanium-iron alloy. The method disclosed by the invention can be used for reducing the content of oxygen in the high-titanium-iron alloy, greatly reducing the pressure and cost in refining treatment of rear processes and improving the production efficiency.
Description
Technical field
The invention belongs to high ferrotitanium alloy field of smelting, be specifically related to magnalium method and produce high ferrotitanium alloy.
Technical background
Mainly with production of high titanium iron by use of aluminothermy, it also claims perrin process at present.Tradition thermite process is produced high ferrotianium proportioning raw materials and is: rutile 55%, aluminium powder 27%, iron powder 5%, lime 6%, Potcrate 7%.Its production method is: in the crucible of magnesia knotting, mainly take rutile as raw material, take aluminium powder as reductive agent, the reactive mode of lighting a fire completes relevant smelting reaction.Slag, ferro-titanium furnace cooling, to be cooled after room temperature, then carry out separation with broken.This method is the main method of producing at present ferrotianium.The subject matter of its existence is: when producing high ferrotianium, residual oxygen amount (>12%) in ferro-titanium is all very high with content of residual aluminum (>8%), must after subsequent process vacuum refinement is processed, can use, so that limit its use range.
In addition, also have two-step approach to smelt high ferrotitanium alloy.Two-step approach is produced high ferrotianium proportioning raw materials: rutile 100%, aluminium powder 37～50%, iron powder 5～7%, lime 15～25%, Potcrate 20～25%.Its production method is: first in stove, take rutile as raw material, the aluminium powder of take makes just (slightly) metal smelting liquid of high ferrotitanium alloy as reductive agent by thermite process, then just (slightly) metal smelting liquid of high ferrotitanium alloy is proceeded to and in vacuum refining furnace, carry out oxygen too much in slag refining removal aluminium alloy, aluminium etc. and be mingled with, thereby make high ferrotitanium alloy molten metal after qualified refining.Finally, under vacuum, solidify acquisition product.The shortcoming of this law be just the oxygen in (slightly) metal smelting liquid, aluminium etc. to be mingled with content very high, the utilization ratio of titanium dioxide is low, the rate of recovery of titanium is low; So that the vacuum refinement treating processes time is long, task is heavy, cost is high, efficiency is low.
Wherein, the composition of high ferrotitanium alloy is required in Table 1:
The composition requirement of table 1 high ferrotitanium alloy
| The trade mark | Ti/％ | Al/％ | Si/％ | P/％ | C/％ | S/％ |
| FeTi70 | 65～75 | ≯5.0 | ≯1.0 | ≯0.05 | ≯0.3 | ≯0.05 |
Summary of the invention
The technical problem to be solved in the present invention is that existing high ferrotitanium alloy smelting process cost is high, efficiency is low, and the residual oxygen amount in ferro-titanium and content of residual aluminum are all very high.
The scheme that the present invention solves the problems of the technologies described above is to provide a kind of magnalium method and produces high ferrotitanium alloy.
Above-mentioned magnalium method is produced high ferrotitanium alloy and is comprised the following steps: by raw material, by 1 part of quality proportioning ilmenite concentrate, 2.3 parts of titanium slags, 1.73～1.93 parts of aluminium powders, magnesium powder, be after 0.83 part of 0.17～0.23 part, 0.27～0.37 part, fluorite, 0.33～0.4 part, lime, Potcrate mixes, adopt upper point pyrometallurgical smelting, obtain high ferrotitanium alloy.
As preferred version of the present invention, the quality proportioning of described raw material is: 1 part of ilmenite concentrate, 2.33 parts of titanium slags, 1.73～1.8 parts of aluminium powders, magnesium powder are 0.17～0.20 part, 0.27～0.37 part, fluorite, 0.33～0.4 part, lime, 0.83 part, Potcrate.
Wherein, above-mentioned magnalium method is produced in high ferrotitanium alloy, the granularity <0.38mm of the ilmenite concentrate using, titanium slag granularity <1mm, the equal <1mm of granularity of aluminium powder, magnesium powder and Potcrate, the granularity <1.5mm of fluorite, the granularity of lime is 20～50mm.
Wherein, above-mentioned magnalium method is produced in high ferrotitanium alloy, and described portion's methods of printing refers on the raw material top mixing and packs portfire into, igniting ignition reaction.
Above-mentioned magnalium method is produced in high ferrotitanium alloy, and concrete operation step is as follows:
A, heating raw materials to 150～200 ℃ insulation is processed 2 hours;
B, by the raw material pulverizing of processing through step a to granularity <1.5mm, mix;
C, on the raw material top mixing, pack portfire into, igniting ignition reaction;
D, reacted after cooling, taken out reaction product, slag and alloy is broken apart, acquisition high ferrotitanium alloy.
Wherein, above-mentioned magnalium method is produced in high ferrotitanium alloy, and mixing described in step b refers to degree of mixing >=98.5%.
Wherein, above-mentioned magnalium method is produced in high ferrotitanium alloy, in step c, the raw material mixing is packed in reactor, reactor top do not feed part spatial altitude should >=reactor volume spatial altitude 1/4.
Beneficial effect of the present invention is: when take the raw material that titanium slag, ilmenite concentrate be titanium, iron, replace 8.6%～11.2% smelt by aluminium amount, to improve at TiO with magnesium
2be reduced in the gradual deoxidizing process of Ti, its limiting element TiO is to the reduction of Ti.The MgO that reaction generates, enters slag phase, improves the composition of slag, reduces the fusing point of slag, improves the mobility of slag, promotes the sedimentation of high ferrotitanium alloy and the floating of oxide inclusion, thereby reduces the oxygen level in high ferrotitanium alloy.Can make titanium content in high ferrotitanium alloy reach 73.6%, aluminium content is less than 4%, and oxygen level is only 8.45%.Present method is smelted high ferrotianium with traditional thermite process, two-step approach and is compared, can reduce the content of oxygen in high ferrotitanium alloy more than 5.6%, greatly reduce pressure, the cost of subsequent process refining treatment process, enhance productivity, improve the utilization ratio of titanium dioxide, improve the rate of recovery of titanium.
Accompanying drawing explanation
The impact of the ratio of Fig. 1 magnesium powder on high ferrotitanium alloy quality.
Embodiment
Raw material mass mixture ratio of the present invention is as follows: 1 part of ilmenite concentrate, and 2.3 parts of titanium slags, 1.73～1.93 parts of aluminium powders, magnesium powder is 0.17～0.23 part, 0.27～0.37 part, fluorite, 0.33～0.4 part, lime, 0.83 part, Potcrate.
As preferred version of the present invention, the quality proportioning of described raw material is: 1 part of ilmenite concentrate, 2.33 parts of titanium slags, 1.73～1.8 parts of aluminium powders, magnesium powder are 0.17～0.20 part, 0.27～0.37 part, fluorite, 0.33～0.4 part, lime, 0.83 part, Potcrate.
Wherein, above-mentioned magnalium method is produced high ferrotitanium alloy, the granularity <0.38mm of the ilmenite concentrate using, titanium slag granularity <1mm, the equal <1mm of granularity of aluminium powder, magnesium powder and Potcrate, the granularity <1.5mm of fluorite, the granularity of lime is 20～50mm.
Magnalium method is produced high ferrotitanium alloy, comprises the following steps:
A, heating raw materials to 150～200 ℃ insulation is processed 2 hours;
B, by the raw material pulverizing of processing through step a to granularity <1.5mm, mix;
C, on the raw material top mixing, pack portfire into, igniting ignition reaction;
D, react complete, at the isolated air of its surface coverage one deck coal dust;
E, after cooling, takes out reaction product, and slag and alloy is broken apart, acquisition high ferrotitanium alloy.
Raw material, in being heated to 150～200 ℃ of insulations process of 2 hours, due to evaporation, the volatilization of water, oil, is just removed its water containing and oil naturally, has also just carried out dehydration, de-oiling processing.
Wherein, above-mentioned magnalium method is produced in high ferrotitanium alloy, and mixing described in step b refers to degree of mixing >=98.5%.Degree of mixing is measured by electrical conductivity method.The compound of getting different positions, is made into slurry, surveys the size of its specific conductivity with conductivitimeter, judges the degree of mixing of compound.If it is inhomogeneous that raw material mixes, just there are part (part) local titanium slag, ilmenite concentrate to contact with reductive agent aluminium, magnesium, and cannot reduce, cause the rate of recovery of titanium low.Exist again in indivedual local local reductive agents surpluses, cause the phenomenon of residual aluminium too high levels in the high ferrotianium of the finished product, also can cause the consumption of reductive agent to rise, increase cost simultaneously.
Wherein, above-mentioned magnalium method is produced in high ferrotitanium alloy, in step c, the raw material mixing is packed in open reactor, reactor top do not feed part spatial altitude should >=reactor volume spatial altitude 1/4.
Reaction times described in step c completes in 5min left and right.The process of reaction is very violent, can give out great brilliancy, and is attended by the generation of splash simultaneously.Can be according to no longer including dazzling radiance, not continuing splash, the reaction bath surface relatively placidity that becomes judges that reaction finishes.
Wherein, above-mentioned magnalium method is produced in high ferrotitanium alloy, broken apart the comprising described in step e: can direct labor use the instruments such as iron hammer, hammer to carry out broken apart; Or be first manually crushed to the degree that can join in jaw crusher on producing, and remove its surperficial bits, then join in jaw crusher and carry out fragmentation, be worked into the degree of customer requirement.
Main raw material titanium slag used in the present invention, ilmenite concentrate, aluminium powder, magnesium powder are normally used industrial raw material; Lime, fluorite, Potcrate are analytical pure.
Raw material chemical constitution of the present invention is shown in Table 2.
Table 2 material chemical component (wt%)
| Raw material | TiO 2 | TFe | SiO 2 | Al | Mg | CaO | CaF 2 | KClO 3 |
| Ilmenite concentrate | 51.2 | 28.9 | 2.3 | ? | ? | ? | ? | ? |
| Titanium slag | 86.5 | 6.1 | 5.6 | ? | ? | ? | ? | ? |
| Aluminium powder | ? | ? | ? | 99.5 | ? | ? | ? | ? |
| Magnesium powder | ? | ? | ? | ? | 99 | ? | ? | ? |
| Lime | ? | ? | 1.5 | ? | ? | 92 | ? | ? |
| Fluorite | ? | ? | ? | ? | ? | ? | 98 | ? |
| Potcrate | ? | ? | ? | ? | ? | ? | ? | 99.5 |
Experimental example 1:
In experiment, changing the consumption of fusing assistant fluorite, lime, is mainly fusing point and the mobility that affects slag, and then changes the separating effect of slag and high ferrotitanium alloy, thereby has influence on recovery rate and the output of high ferrotitanium alloy.
The impact of the change of table 3 fusing assistant on high ferrotitanium alloy output
As known from Table 3: in the situation that titanium material (ilmenite concentrate and titanium slag), reductive agent (aluminium powder), heat-generating agent (Potcrate) do not change, the Optimum of (1) fluorite is at 40～55g; (2) reasonable volume of lime is 50～60g.If fluorite consumption lower than 40g, there will be slag fusing point to uprise, slag is separated with high ferrotitanium alloy to encounter difficulties, the situation of the obvious step-down of high ferrotitanium alloy output, or there is in ferro-titanium the situation with slag.If, there is not the situation that output obviously increases in fluorite add-on >55g.If lime consumption is very few or too much, the generation of the calcium-aluminate of the low melting point phase in slag all can correspondingly reduce, thereby affect the mobility of slag, affect the separating effect of slag and high ferrotitanium alloy, and then affect the output of high ferrotitanium alloy, increase the amount of carrying high ferrotitanium alloy secretly in slag, affect the recovery rate of high ferrotitanium alloy.
Experimental example 2:
When ilmenite concentrate 150g, titanium slag 350g, fluorite 50g, lime 55g, Potcrate 125g, aluminium powder 290g, magnesium powder replaces the ratio of aluminium powder to see Fig. 1 to the impact of high ferrotitanium alloy quality.
As can be seen from Figure 1: the ratio control that replaces aluminium powder when magnesium powder is 8.6～11.2%, and during average out to 10%, its effect is best.If the usage quantity of magnesium powder is excessive, can cause splash loss to increase because the reaction of magnesium is too fierce, absorb airborne hyperoxia simultaneously and cause the grade of titanium to decline to some extent.The usage quantity of magnesium powder is very few, and its effect is poor, does not reach the object adding.
Embodiment 1～7
After raw material mass mixture ratio in employing table 3 mixes, operate as follows:
A, by heating raw materials to 200 ℃ insulation 2h, be dried, dehydration, de-oiling are processed;
B, by raw material pulverizing to the granularity of processing through step a, be 1.5mm;
C, by the proportioning of test requirements document, form and weigh, mix, pack in Magnesia crucible; Requirement degree of mixing >=98.5%;
D, pack the raw material top mixing in crucible into fuse, igniting ignition reaction;
E, react complete, at the isolated air of its surface coverage one deck coal dust; After cooling, take out reaction product;
F, slag and alloy are carried out broken apart, obtain high ferrotitanium alloy.
Experimental result is shown in Table 4:
The proportioning raw materials of the different reductive agents of table 4 and high ferrotitanium alloy detected result
As known from Table 4: test 6 relatively excellently, than other experimental program, have higher output, higher [Ti] content (being 73.6%), lower oxygen level (being only 8.45%).Experiment 6 is compared with traditional method, and the oxygen level in alloy has reduced by 5.63 percentage points, can alleviate to a great extent pressure, cost, the treatment time of postorder operation refining treatment, enhances productivity, and reduces production costs.
Method provided by the invention can reduce the content of oxygen in high ferrotitanium alloy, greatly reduces pressure, the cost of subsequent process refining treatment process, enhances productivity, and improves the utilization ratio of titanium dioxide, improves the rate of recovery of titanium.
Claims (5)
1. magnalium method is produced high ferrotitanium alloy, comprise the following steps: by raw material, by 1 part of quality proportioning ilmenite concentrate, 2.3 parts of titanium slags, 1.73～1.93 parts of aluminium powders, magnesium powder, be after 0.83 part of 0.17～0.23 part, 0.27～0.37 part, fluorite, 0.33～0.4 part, lime, Potcrate mixes, adopt upper point pyrometallurgical smelting, obtain high ferrotitanium alloy.
2. magnalium method according to claim 1 is produced high ferrotitanium alloy, it is characterized in that: the quality proportioning of described raw material is: 1 part of ilmenite concentrate, 2.33 parts of titanium slags, 1.73～1.8 parts of aluminium powders, magnesium powder are 0.17～0.20 part, 0.27～0.37 part, fluorite, 0.33～0.4 part, lime, 0.83 part, Potcrate.
3. magnalium method according to claim 1 is produced high ferrotitanium alloy, it is characterized in that: operation steps is as follows:
A, heating raw materials to 150～200 ℃ insulation is processed 2 hours;
B, by the raw material pulverizing of processing through step a to granularity < 1.5mm, mix;
C, on the raw material top mixing, pack portfire into, igniting ignition reaction;
D, reacted after cooling, taken out reaction product, slag and alloy is broken apart, acquisition high ferrotitanium alloy.
4. magnalium method according to claim 3 is produced high ferrotitanium alloy, it is characterized in that: mixing described in step b refers to degree of mixing >=98.5%.
5. magnalium method according to claim 3 is produced high ferrotitanium alloy, it is characterized in that: in step c, the raw material mixing is packed in open reactor, reactor top do not feed part spatial altitude should >=reactor volume spatial altitude 1/4.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104152694A (en) * | 2014-09-05 | 2014-11-19 | 攀枝花学院 | Calcium-magnesium-titanium method for producing high ferrotitanium alloy |
| CN107557600A (en) * | 2017-09-15 | 2018-01-09 | 攀枝花学院 | A kind of high ferrotitanium alloy and preparation method thereof |
| CN107586971A (en) * | 2017-08-18 | 2018-01-16 | 王武生 | A kind of method that titanium or titanium alloy is directly produced using titanium dioxide |
| CN111744556A (en) * | 2020-07-10 | 2020-10-09 | 攀枝花学院 | Catalyst for accelerating reduction of titanium concentrate and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152694A (en) * | 2014-09-05 | 2014-11-19 | 攀枝花学院 | Calcium-magnesium-titanium method for producing high ferrotitanium alloy |
| CN107586971A (en) * | 2017-08-18 | 2018-01-16 | 王武生 | A kind of method that titanium or titanium alloy is directly produced using titanium dioxide |
| CN107557600A (en) * | 2017-09-15 | 2018-01-09 | 攀枝花学院 | A kind of high ferrotitanium alloy and preparation method thereof |
| CN111744556A (en) * | 2020-07-10 | 2020-10-09 | 攀枝花学院 | Catalyst for accelerating reduction of titanium concentrate and preparation method thereof |
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