CN103966429A - Method for preparing chloride titanium slag from high-calcium-magnesium titanium concentrate - Google Patents
Method for preparing chloride titanium slag from high-calcium-magnesium titanium concentrate Download PDFInfo
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Abstract
The invention provides a method for preparing chloride titanium slag from high-calcium-magnesium titanium concentrate. The method comprises the steps of pressing high-calcium-magnesium titanium concentrate, coke powder and a binder into balls, pre-reducing and carrying out vacuum smelting separation to effectively remove calcium, magnesium and other impurities in titanium concentrate so as to achieve the purpose of enriching titanium slag, wherein the grade of TiO2 in obtained chloride titanium slag can reach 93% and very high titanium slag quality is achieved. Meanwhile, the method for preparing chloride titanium slag from high-calcium-magnesium titanium concentrate disclosed by the invention has the advantages that process simpleness and convenience in operation; the energy consumption is reduced in the whole preparation process, the emission of three wastes is greatly reduced, and the problems of high energy consumption, poor impurity removal capability and large output of three wastes in the existing titanium slag production process are solved well. The method provides a feasible technology for preparing high-quality titanium slag from high-calcium-magnesium titanium concentrate and has very good market prospects.
Description
Technical field
The present invention relates to metallurgical engineering technology and environmental protection and energy saving technical field, relate in particular to a kind of method that adopts high calcium-magnesium-titanium heading to prepare chlorination titanium slag.
Background technology
The Panxi Diqu of China is being stored abundant titanium resource, accounts for the more than 90% of national titanium total reserves, accounts for world saving 35%, and Flos Bombacis Malabarici is just becoming the important titanium industry production base of China.But be mainly the ferrotianium symbiosis rock ore deposit including vanadium titano-magnetite or ilmenite concentrate, rutile is very few, and ilmenite concentrate is ore type high calcium-magnesium-titanium heading, TiO
2content is in 47% left and right, and calcium and magnesium oxides content is up to 6%～8%.Along with petering out and price increase of natural rutile resource, oneself becomes the main production raw material of titanium industry the abundant ilmenite concentrate of reserves.But due to its TiO
2grade is low, generally all needs in advance its enrichment to be become high-grade rich titanium material (titanium slag or artificial rutile), then is used for producing titanium white and metal titanium (Qiu Guanzhou, Guo Yufeng; Ilmenite enriching method is commented; Mineral products comprehensive utilization; 1998).Research and production practice show: titanium industry, taking rich titanium material as raw material, can reduce the quantity discharged of " three wastes " greatly, also can save operation simultaneously, reduces production costs, and expands production capacity, and are conducive to improve the general technical level that Ti product is produced.The method of producing rich titanium material of having studied both at home and abroad and propose mainly contains electric furnace smelting process, selective chlorination, reduction pickling process, choosing-smelting associating dilute hydrochloric acid pressure leaching process, preoxidation-fluidization pickling process, Reductive leaching and reduction magnetic method etc. and (swims high; Admire iron ore solid state reduction research of reinforced by additive; Central South University, 2009), but be mainly electric furnace smelting process, pickling process and Reductive leaching in the method for industrial acquisition application at present, the whole bag of tricks has its feature.
Electric furnace smelting process is by ilmenite concentrate melting in electric furnace together with coke (or other solid reductants), the electric arc producing by means of electrode, furnace charge is heated to 1650 DEG C of above high temperature, makes reduction of ferrous oxide in ilmenite concentrate become metallic iron sedimentation in stove, TiO
2in the enrichment of slag phase, thereby realize iron, titanium separation, obtain respectively titanium slag and the pig iron.From the ultimate principle of electric furnace smelting process, this process is mainly separation deironing, removes non-iron contamination ability, and the titanium slag grade of producing depends primarily on the content of non-iron contamination in ilmenite concentrate, but also exists the high deficiency of power consumption.But, the method have do not produce solid and liquid waste, electric furnace coal gas recoverable, " three wastes " amount less, ferrotianium utilizes the advantages such as degree is high, factory floor space is little, technological process is simple, equipment capacity is large, be particularly suitable for the abundant area of hydroelectric resources and use, thereby become one of main method prepared by rich titanium material.But this method also has limitation, fusion process is mainly to separate to remove iron in ilmenite concentrate, and removal ability to impurity such as the silicon in ilmenite concentrate, calcium, magnesium.Thereby the ore type ilmenite concentrate of high contents of calcium and magnesium impurity adopts electric furnace smelting process enrichment processing can not directly obtain the product that meets the high-quality titanium slag of producing titanium white chloride and titanium sponge.
Reduction-rusting process is a kind of method of selectivity deironing, its ultimate principle is: adopt solid state reduction method, first ilmenite ferriferous oxide wherein is at high temperature reduced to metallic iron, titanium still exists with oxide form, and then in 40 DEG C～75 DEG C weak acidic mediums, blast air and make metallic iron corrosion wherein going back original product, utilize the ferric hydrous oxide that generates after corrosion and rich titanium material because of its granularity different with proportion, adopt the method for physical separation to separate, obtain rich titanium material and byproduct hydration ferriferous oxide.The method only consumes a small amount of hydrochloric acid in the time of corrosion, and the red mud of generation and waste water are a kind of pollute few and low methods of cost.The method is effectively to removing impurity iron, but can not remove other impurity such as silicon, calcium, magnesium, the high-grade placer type of the low impurity of suitable treatment ilmenite concentrate, the difficult ore type ilmenite concentrate of processing high impurity.
Pickling process can effectively be removed the soluble impurities such as de-iron and calcium, magnesium, aluminium, manganese, obtains high-grade titanium slag.Be applicable to process the mineral that silicone content is few.Pickling process comprises again two kinds of Leaching in Hydrochloric Acid and sulfuric acid leachings.Due to ferrous acid-soluble ferric iron that is better than, so by ilmenite concentrate reduction, make iron be converted into ferrous iron, then leach reduzate with dilute sulphuric acid, make iron optionally enter liquid phase, titanium is enriched in solid phase.In acidleach process, not only iron is removed by leaching, also being leached in various degree of the impurity such as calcium, magnesium, aluminium, manganese, and therefore the product purity of gained is higher in this way, is applicable to processing various types of titanium minerals.But the seriously corroded of this method to equipment, byproduct and three wastes quantum of output are large, secondary flow journey complexity, environmental protection pressure is large, thereby has limited the use of the method.
The ilmenite concentrate ore type high calcium-magnesium-titanium heading of Panxi Diqu, calcium magnesium addition content is high.In order to produce titanium slag, product purity is low, and foreign matter content is high, and especially impurity magnesium is composed and is stored in ilmenite with isomorph, and it is large that magnesium difficulty falls in enrichment.Cannot meet the requirement of producing titanium white chloride and titanium sponge.If adopt electric furnace smelting process can only separate with Reductive leaching enrichment the iron of removing in ilmenite concentrate, and large to removal ability, the technical difficulty of the impurity such as the calcium in ore deposit, magnesium, aluminium, manganese.The titanium slag of producing, produce the process of titanium white for chlorination process, will form low melting point, high boiling CaCl
2, MgCl
2, they are molten state in chlorination process, are difficult to volatilize away in ebullated bed, and along with the carrying out of chlorination reaction, in bed, more collection is more, makes particle bond, worsens boiling situation, even blocking screen plate hole eye, (history is wide for Li Yuankun, Liu Yachuan cannot to carry out normal chlorination operation, Yan Wu, high impurity ilmenite concentrate is produced the method for rich titanium material.Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of G, 2011).Although salt acid system calcium-magnesium removing impurity is strong, energy consumption is high, and equipment corrosion is serious, and spent acid amount and the by-product volume of generation are large.Thereby utilization and the titanium industrial expansion of Panxi Diqu titanium resource are seriously restricted.
Summary of the invention
For above shortcomings in prior art, the object of the present invention is to provide a kind of method that adopts high calcium-magnesium-titanium heading to prepare chlorination titanium slag, it utilizes the high ilmenite concentrate of calcium magnesium addition content to produce high-grade titanium chloride residue product, thereby produce a kind of novel process is provided for titanium slag, to solve, titanium slag energy consumption in production process in prior art is high, Impurity removal ability, problem that three wastes quantum of output is large.
For achieving the above object, the present invention has adopted following technique means:
1) pressure ball step: high calcium-magnesium-titanium heading, coke powder, binding agent are mixed by the weight ratio of 90 ~ 110:10 ~ 15:0.15 ~ 0.3, and the mould pressure ball that is 10～20mm with diameter, makes pelletizing;
2) prereduction step: adopt tube furnace to carry out prereduction, prereduction temperature is 1350 DEG C～1400 DEG C, after the temperature that reaches setting until furnace temperature, put into again pelletizing and start timing, recovery time is 20～40min, and logical argon gas reduces pelletizing under the protective atmosphere of argon gas in prereduction process;
3) vacuum is molten step by step: the pelletizing after prereduction is carried out in vacuum carbon tube furnace to molten point of vacuum, vacuum tightness is 50～150Pa, and molten point temperature is 1450～1550 DEG C, and soaking time 15～45min, collects remaining solid phase and obtain chlorination titanium slag.
Than prior art, the present invention has following beneficial effect:
1, the method that the present invention adopts high calcium-magnesium-titanium heading to prepare chlorination titanium slag melts step by step by pressure ball, prereduction, vacuum, has effectively removed the impurity such as calcium, magnesium in ilmenite concentrate, reaches the object of enrichment titanium slag.
2, TiO in the chlorination titanium slag that the method that the present invention adopts high calcium-magnesium-titanium heading to prepare chlorination titanium slag obtains
2grade all reached more than 87%, there is very high titanium slag quality.
3, the present invention adopts high calcium-magnesium-titanium heading to prepare the method for chlorination titanium slag, its flow process is simple, easy to operate, and overall preparation process has reduced energy consumption, greatly reduce the quantity discharged of " three wastes ", well solve that titanium slag energy consumption in production process in prior art is high, Impurity removal ability, problem that three wastes quantum of output is large, produce high-quality titanium slag for high calcium-magnesium-titanium heading possible technique is provided, there is good market application foreground.
Brief description of the drawings
Fig. 1 is that the present invention adopts high calcium-magnesium-titanium heading to prepare the schema of the method for chlorination titanium slag.
Embodiment
For utilizing in prior art, high calcium-magnesium-titanium heading produces that titanium slag energy consumption is high, Impurity removal ability, problem that three wastes quantum of output is large, the invention provides a kind of method that adopts high calcium-magnesium-titanium heading to prepare chlorination titanium slag, in order to effectively to remove calcium, the magnesium addition in high calcium-magnesium-titanium heading, produce high-grade titanium chloride residue product.The method flow that the present invention prepares higher-grade chlorination titanium slag as shown in Figure 1, specifically comprises the steps:
1) pressure ball step: high calcium-magnesium-titanium heading, coke powder, binding agent are mixed by the weight ratio of 90 ~ 110:10 ~ 15:0.15 ~ 0.3, and the mould pressure ball that is 10～20mm with diameter, makes pelletizing;
2) prereduction step: adopt tube furnace to carry out prereduction, prereduction temperature is 1350 DEG C～1400 DEG C, after the temperature that reaches setting until furnace temperature, put into again pelletizing and start timing, recovery time is 20～40min, and logical argon gas reduces pelletizing under the protective atmosphere of argon gas in prereduction process;
3) vacuum is molten step by step: the pelletizing after prereduction is carried out in vacuum carbon tube furnace to molten point of vacuum, vacuum tightness is 50～150Pa, and molten point temperature is 1450～1550 DEG C, and soaking time 15～45min, collects remaining solid phase and obtain chlorination titanium slag.
In chlorination titanium slag preparation method of the present invention, adopt first prereduction, melted the processing method of dividing again, its reason is: by prereduction, make ilmenite (Fe
2tiO
3) be reduced into Fe, Ti
no
2n 1, FeTi
2o
5, Ti
3o
5, Fe
3c.After prereduction certain hour, make Fe collect to core position the slag iron having promoted in follow-up molten point process and separate, the Fe of some amount
3c can reduce the melting temperature of pelletizing, has shortened to a certain extent the follow-up molten point time, energy efficient; Then, again the pelletizing after prereduction is carried out in vacuum carbon tube furnace to molten point of vacuum, be 50～150Pa through Theoretical Calculation in vacuum tightness, the titanium slag grade that molten point temperature obtains while being 1450～1550 DEG C is higher, continues gas clean-up and temperature little to titanium slag product position influence.MnO, SiO in the molten point process of vacuum
2more easily be reduced into metal simple-substance with the oxide compound such as MgO, and the impurity such as silicon, magnesium, manganese can vapor away with steam form, after molten point of vacuum, a slag thing is Ti mutually
2o
3, TiO and a small amount of metallic iron.Vacuum melts timesharing, and the impurity such as silicon, magnesium, manganese have vapored away by steam form, there is no the formation of pseudobrookite type sosoloid, and the high price titanium in slag and ferriferous oxide more easily reduce, so the titanium slag grade of gained is higher after molten point of vacuum.
Flow process by above-mentioned preparation higher-grade chlorination titanium slag can be seen, the present invention utilizes the high ilmenite concentrate of calcium magnesium addition content to produce high-grade titanium chloride residue product, not only realize the recycling to high calcium-magnesium-titanium heading, can also produce and obtain high-grade titanium chloride residue product, and it is high to efficiently solve in prior art titanium slag energy consumption in production process, Impurity removal ability, the problem that three wastes quantum of output is large, its reason is that ilmenite concentrate is through shortening the follow-up molten point time with reduction, in the molten point process of vacuum, effectively go out calcium, magnesium, the impurity such as manganese, and these impurity are all to vapor away with vapor form, so the titanium slag that this flow process obtains is of high grade, quantity of three wastes is few.
Below in conjunction with embodiment, technical scheme of the present invention is further described.
embodiment mono-:
Extract Flos Bombacis Malabarici existing a kind of high calcium-magnesium-titanium heading, through chemical analysis obtain its composition and massfraction as shown in table 1:
Table 1
The present embodiment utilizes the inventive method, adopts this high calcium-magnesium-titanium heading to prepare chlorination titanium slag, and its concrete steps are as follows:
1) pressure ball step: the binding agent of the coke powder of the high calcium-magnesium-titanium heading of 100 weight parts, 12 weight parts, 0.2 weight part is mixed, and the mould pressure ball that is 15mm with diameter, makes pelletizing.
In the present embodiment, binding agent used is methylcellulose gum, and the composition of coke powder used is as shown in table 2:
Table 2
In pressure ball step, high calcium-magnesium-titanium heading and coke powder preferably need through milled processed, and after grinding, grain graininess is less than 200 orders, to be conducive to pelletizing and follow-up prereduction processing.And the pressure of pelletizing preferably can reach 20MPa, make the tight moulding of pelletizing.
In addition, after pressure ball step, before prereduction step, preferably also the pelletizing of pressure ball gained is dried to 4 hours in the thermostatic drying chamber of 200 DEG C, make the pelletizing moulding of pressure ball gained firm, with better ensure pelletizing can spallation in prereduction is processed, cave in.
2) prereduction step: adopt tube furnace to carry out prereduction; prereduction temperature is 1380 DEG C, puts into pelletizing again and start timing until furnace temperature after the temperature that reaches setting, and the recovery time is 30min; and logical argon gas reduces pelletizing under the protective atmosphere of argon gas in prereduction process.
3) vacuum is molten step by step: the pelletizing after prereduction is carried out in vacuum carbon tube furnace to molten point of vacuum, vacuum tightness is 100Pa, and molten point temperature is 1500 DEG C, and soaking time 45min, collects remaining solid phase and obtain chlorination titanium slag.
The composition of the chlorination titanium slag finally obtaining is as shown in table 3:
Table 3
embodiment bis-:
The present embodiment utilizes the inventive method, adopts the high calcium-magnesium-titanium heading described in embodiment mono-to prepare chlorination titanium slag, and its concrete steps are as follows:
1) pressure ball step: the binding agent of the coke powder of the high calcium-magnesium-titanium heading of 90 weight parts, 15 weight parts, 0.15 weight part is mixed, and the mould pressure ball that is 10mm with diameter, makes pelletizing.
In the present embodiment, binding agent used is methyl fibrous bundle, and coke powder used is identical with embodiment mono-.
2) prereduction step: adopt tube furnace to carry out prereduction; prereduction temperature is 1350 DEG C, puts into pelletizing again and start timing until furnace temperature after the temperature that reaches setting, and the recovery time is 20min; and logical argon gas reduces pelletizing under the protective atmosphere of argon gas in prereduction process.
3) vacuum is molten step by step: the pelletizing after prereduction is carried out in vacuum carbon tube furnace to molten point of vacuum, vacuum tightness is 50Pa, and molten point temperature is 1450 DEG C, and soaking time 45min, collects remaining solid phase and obtain chlorination titanium slag.
The composition of the chlorination titanium slag finally obtaining is as shown in table 4:
Table 4
embodiment tri-:
The present embodiment utilizes the inventive method, adopts the high calcium-magnesium-titanium heading described in embodiment mono-to prepare chlorination titanium slag, and its concrete steps are as follows:
1) pressure ball step: the binding agent of the coke powder of the high calcium-magnesium-titanium heading of 110 weight parts, 10 weight parts, 0.3 weight part is mixed, and the mould pressure ball that is 20mm with diameter, makes pelletizing.
In the present embodiment, binding agent used is methyl fibrous bundle, and coke powder used is identical with embodiment mono-.
2) prereduction step: adopt tube furnace to carry out prereduction; prereduction temperature is 1400 DEG C, puts into pelletizing again and start timing until furnace temperature after the temperature that reaches setting, and the recovery time is 40min; and logical argon gas reduces pelletizing under the protective atmosphere of argon gas in prereduction process.
3) vacuum is molten step by step: the pelletizing after prereduction is carried out in vacuum carbon tube furnace to molten point of vacuum, vacuum tightness is 150Pa, and molten point temperature is 1550 DEG C, and soaking time 15min, collects remaining solid phase and obtain chlorination titanium slag.
The composition of the chlorination titanium slag finally obtaining is as shown in table 5:
Table 5
As seen from the above-described embodiment, the present invention adopts high calcium-magnesium-titanium heading to prepare the method for chlorination titanium slag, has effectively removed the impurity such as calcium, magnesium in ilmenite concentrate, reaches the object of enrichment titanium slag, TiO in the chlorination titanium slag obtaining
2grade all reached more than 87%, there is very high titanium slag quality.Wherein, adopt the high calcium-magnesium-titanium heading of composition as described in Table 1, according to the high calcium-magnesium-titanium heading of embodiment mono-, coke powder, binding agent proportioning and corresponding process control parameter thereof, TiO in gained chlorination titanium slag
2grade is the highest, has reached 93.65%; In embodiment bis-, because of TiO in the lower slightly chlorination titanium slag that makes output of ratio of high calcium-magnesium-titanium heading
2content reduces to some extent, but has also reached 88.51%; In embodiment tri-, because the dosage of coke amount as reductive agent reduces relatively, to TiO in the chlorination titanium slag of output
2content affects to some extent, but has reached equally 87.77% higher-grade.And if the composition difference of high calcium-magnesium-titanium heading adopting, the best proportioning of preparing chlorination high calcium-magnesium-titanium heading that titanium slag adopts, coke powder, binding agent by the inventive method may be compared from embodiment mono-slightly different, but the proportioning ratio of high calcium-magnesium-titanium heading, coke powder, binding agent should be all in the scope of 90 ~ 110:10 ~ 15:0.15 ~ 0.3.Simultaneously, the method flow that adopts high calcium-magnesium-titanium heading to prepare chlorination titanium slag from the present invention also can be seen, its flow process is simple, easy to operate, and overall preparation process has reduced energy consumption, greatly reduce the quantity discharged of " three wastes ", well solve that titanium slag energy consumption in production process in prior art is high, Impurity removal ability, problem that three wastes quantum of output is large, produce high-quality titanium slag for high calcium-magnesium-titanium heading possible technique be provided, there is good market application foreground.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (5)
1. adopt high calcium-magnesium-titanium heading to prepare a method for chlorination titanium slag, it is characterized in that, comprise the steps:
1) pressure ball step: high calcium-magnesium-titanium heading, coke powder, binding agent are mixed by the weight ratio of 90 ~ 110:10 ~ 15:0.15 ~ 0.3, and the mould pressure ball that is 10～20mm with diameter, makes pelletizing;
2) prereduction step: adopt tube furnace to carry out prereduction, prereduction temperature is 1350 DEG C～1400 DEG C, after the temperature that reaches setting until furnace temperature, put into again pelletizing and start timing, recovery time is 20～40min, and logical argon gas reduces pelletizing under the protective atmosphere of argon gas in prereduction process;
3) vacuum is molten step by step: the pelletizing after prereduction is carried out in vacuum carbon tube furnace to molten point of vacuum, vacuum tightness is 50～150Pa, and molten point temperature is 1450～1550 DEG C, and soaking time 15～45min, collects remaining solid phase and obtain chlorination titanium slag.
2. adopt according to claim 1 high calcium-magnesium-titanium heading to prepare the method for chlorination titanium slag, it is characterized in that, described binding agent is methylcellulose gum.
3. adopt according to claim 1 high calcium-magnesium-titanium heading to prepare the method for chlorination titanium slag, it is characterized in that, in described pressure ball step, high calcium-magnesium-titanium heading and coke powder need to grind, and after grinding, grain graininess is less than 200 orders.
4. adopt according to claim 1 high calcium-magnesium-titanium heading to prepare the method for chlorination titanium slag, it is characterized in that, after described pressure ball step, before prereduction step, also the pelletizing of pressure ball gained is dried to 4 hours in the thermostatic drying chamber of 200 DEG C.
5. adopt according to claim 1 high calcium-magnesium-titanium heading to prepare the method for chlorination titanium slag, it is characterized in that, in described pressure ball step, the pressure of pelletizing is 20MPa.
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| CN104988307A (en) * | 2015-06-17 | 2015-10-21 | 贵州大学 | Method for comprehensively using titanium concentrate with high calcium and magnesium content |
| CN106591600A (en) * | 2017-01-05 | 2017-04-26 | 重庆大学 | Method for preparing high-titanium slag through low-temperature gas-based reduction titanium-containing iron mineral powder |
| CN106702064A (en) * | 2016-12-13 | 2017-05-24 | 昆明理工大学 | Method for preparing high-grade titanium slag by taking vanadium titano-magnetite as raw material |
| CN108531752A (en) * | 2018-06-13 | 2018-09-14 | 长江师范学院 | A kind of preparation method of reduction titanium |
| CN110482603A (en) * | 2019-09-26 | 2019-11-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for improving titanium slag grade |
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| CN113604671A (en) * | 2021-07-30 | 2021-11-05 | 四川顺应动力电池材料有限公司 | Method for preparing high-purity titanium slag from high-calcium-magnesium titanium concentrate |
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| CN104988307A (en) * | 2015-06-17 | 2015-10-21 | 贵州大学 | Method for comprehensively using titanium concentrate with high calcium and magnesium content |
| CN106702064A (en) * | 2016-12-13 | 2017-05-24 | 昆明理工大学 | Method for preparing high-grade titanium slag by taking vanadium titano-magnetite as raw material |
| CN106702064B (en) * | 2016-12-13 | 2019-02-05 | 昆明理工大学 | A method of using vanadium titano-magnetite as waste high-grade titanium slag |
| CN106591600A (en) * | 2017-01-05 | 2017-04-26 | 重庆大学 | Method for preparing high-titanium slag through low-temperature gas-based reduction titanium-containing iron mineral powder |
| CN106591600B (en) * | 2017-01-05 | 2019-03-29 | 重庆大学 | A kind of method that low temperature gas-based reduction titanium-containing iron ore object powder prepares high titanium slag |
| CN108531752A (en) * | 2018-06-13 | 2018-09-14 | 长江师范学院 | A kind of preparation method of reduction titanium |
| CN110482603A (en) * | 2019-09-26 | 2019-11-22 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for improving titanium slag grade |
| CN110482603B (en) * | 2019-09-26 | 2022-01-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving grade of titanium slag |
| CN112320840A (en) * | 2020-11-04 | 2021-02-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Boiling chlorination method for treating low-grade high-calcium magnesium titanium ore |
| CN113604671A (en) * | 2021-07-30 | 2021-11-05 | 四川顺应动力电池材料有限公司 | Method for preparing high-purity titanium slag from high-calcium-magnesium titanium concentrate |
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