CN109174318A - The method that clinker containing titanium carbide removes iron - Google Patents

The method that clinker containing titanium carbide removes iron Download PDF

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Publication number
CN109174318A
CN109174318A CN201811004235.2A CN201811004235A CN109174318A CN 109174318 A CN109174318 A CN 109174318A CN 201811004235 A CN201811004235 A CN 201811004235A CN 109174318 A CN109174318 A CN 109174318A
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CN
China
Prior art keywords
clinker
vertical mill
titanium carbide
iron
titanium
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Application number
CN201811004235.2A
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Chinese (zh)
Inventor
王东生
张溅波
赵青娥
黄家旭
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攀钢集团攀枝花钢铁研究院有限公司
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Priority to CN201811004235.2A priority Critical patent/CN109174318A/en
Publication of CN109174318A publication Critical patent/CN109174318A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B3/00General features in the manufacture of pig-iron
    • C21B3/04Recovery of by-products, e.g. slag
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies

Abstract

The invention belongs to field of metallurgy, are related specifically to a kind of method that clinker containing titanium carbide removes iron.The present invention is to solve iron content excessively high the technical issues of will affect subsequent titanium tetrachloride production process in current clinker containing titanium carbide.The method of the present invention are as follows: crush the Titanium slag containing carbonization using Vertical Mill technique, 5%~45% that returning charge amount is feeding coal is controlled in Vertical Mill crushing process, gained returning charge is subjected to iron removal by magnetic separation, returning charge after iron removal by magnetic separation is sent into feed system and continues to crush, it crushes obtained fine powder to send through vertical mill discharge port to collection system, obtains qualified titanium carbide clinker.This method has many advantages, such as that simple process, at low cost, de-ironing efficiency is high, and this method can efficiently separate the titanium carbide and iron in the Titanium slag containing carbonization, meets requirement of the subsequent handling to iron content in the titanium slag material containing carbonization.

Description

The method that clinker containing titanium carbide removes iron
Technical field
The invention belongs to field of metallurgy, are related specifically to a kind of method that clinker containing titanium carbide removes iron.
Technical background
Panxi Diqu vanadium titano-magnetite is resourceful, and through traditional blast furnace ironmaking-converter steelmaking process, most of titanium is entered In blast furnace slag, TiO in blast furnace slag2Content is 20%~26%.For steel climbing high slag, domestic many research institutions once carried out A variety of researchs for mentioning titanium technology path, for example produce silicon titanium composite alloy, production cinder microcrystalline glass etc., but processing capacity has Limit, cannot fundamentally solve the problem of complex utilization of titanium-containing blast furnace slag.Currently, blast furnace slag " the high temperature cabonization-low temperature chlorine of titaniferous TiCl is produced in change4" process route be most industrialization prospect technology path, technique is divided into high temperature cabonization, low-temperature boiling chlorine Change three steps of utilization with chloride residue, has many advantages, such as that process is short, treating capacity is big, titanium resource comprehensive utilization ratio is high.
During high temperature cabonization, titanium dioxide is changed into titanium carbide, and excess is mutually held essentially constant, and obtains product and contains Titanium carbide clinker, mainly by TiC, Fe, CaO, MgO, Al2O3And SiO2Deng composition.Since titanium-containing blast furnace slag viscosity is big, blast furnace slag Usually it is mingled with 3%~5% iron in tapping process, this part iron enters in clinker containing titanium carbide through carbonization technique, by low temperature Chloridization process, the Fe in slag is further reacted with chlorine generates iron chloride, seriously affects the quality and chloridization process of titanium tetrachloride Stable operation, therefore technique require containing carbonization Titanium slag in Fe content less than 3%.But there is presently no more inexpensive and The good removal of effect or the method for controlling iron content.
Summary of the invention
The object of the present invention is to provide a kind of method that Titanium slag containing carbonization removes iron, iron in clinker containing titanium carbide at present is solved Too high levels will affect the technical issues of subsequent titanium tetrachloride production process.
The present invention in order to solve this technical problem, provides a kind of method that clinker containing titanium carbide removes iron, it is characterised in that: The Titanium slag containing carbonization is crushed using Vertical Mill technique, control returning charge amount is the 5%~45% of feeding coal in Vertical Mill crushing process, by institute It obtains returning charge and carries out iron removal by magnetic separation, the returning charge after iron removal by magnetic separation is sent into feed system and continues to crush, and the fine powder crushed is through Vertical Mill Machine discharge port is sent to collection system, obtains qualified titanium carbide clinker.
Wherein, the neutrality of Vertical Mill technique described in above method mill grinding roller pressure is 3~7MPa.
Wherein, the inlet outlet pressure differential of vertical mill is 1.2kPa~2.1kPa in Vertical Mill technique described in the above method.
Wherein, the magnetic field strength on returning charge surface is 400Gs~800Gs in magnetic separation step described in the above method.
Wherein, clinker containing titanium carbide described in the above method is containing TiO2Clinker and carbonaceous reducing agent progress high temperature cabonization are anti- The product answered.
Wherein, carbonaceous reducing agent described in the above method is anthracite or coke powder.
Compared with prior art, advantages of the present invention is as follows: it is high that the present invention is directed to Fe content in the titanium slag material containing carbonization The problem of influencing subsequent handling, by controlling suitable Vertical Mill technological parameter and using the technology and hand of returning charge iron removal by magnetic separation Section reduces the content of Fe in clinker containing titanium carbide while TiC loss is small in guaranteeing the powder of clinker containing titanium carbide.Experiment card It is bright, using the method for the present invention, after TiC loss is down to 3% hereinafter, meeting less than 2.5%, Fe content in titanium carbide clinker powder Continuous requirement of the low temperature chlorination process to Fe content in slag, has many advantages, such as that simple process, at low cost, de-ironing efficiency is high, has very Good application prospect.
Specific embodiment
The present invention is further elaborated with reference to embodiments, and embodiment is merely to illustrate the present invention, rather than with Any mode is invented to limit.
The clinker of titaniferous " high temperature cabonization-low temperature chlorination produces TiCl4" process route be most industrialization prospect Technology path, technique are divided into three steps of utilization of high temperature cabonization, low-temperature boiling chlorination and chloride residue.
Clinker containing titanium carbide is to be containing TiO2Clinker and carbonaceous reducing agent carry out the product of pyroreaction, mainly by TiC, Fe、CaO、MgO、Al2O3And SiO2Deng composition.
In practice, the Fe in clinker containing titanium carbide can further be reacted with chlorine generates iron chloride, seriously affects four chlorinations The quality of titanium and the stable operation of chloridization process, thus technique require containing carbonization Titanium slag in Fe content less than 3%.
Inventor passes through a large amount of creative work, discovery dexterously utilize iron in clinker containing titanium carbide and titanium carbide it Between density and magnetic difference, be crushed using Vertical Mill technique, by the way that reasonable Vertical Mill parameter is arranged, keep iron most of into Enter in revert system, in combination with magnetic separation process, can simply remove the most iron in clinker containing titanium carbide, make Vertical Mill E content in the slag fines containing titanium carbide that machine discharge port is received is down to 3% hereinafter, meeting subsequent low temperature chlorination process to slag The requirement of middle Fe content.
Present invention clinker containing titanium carbide is except the method for iron is the following steps are included: crush the titanium ore containing carbonization using Vertical Mill technique Slag, control returning charge amount is the 5%~45% of feeding coal in Vertical Mill crushing process, gained returning charge is carried out iron removal by magnetic separation, magnetic separation removes Returning charge after iron is sent into feed system and continues to crush, and collects smashed clinker containing titanium carbide in vertical mill discharge port.Vertical Mill work The feeding quantity of skill is greater than the yield of vertical mill, and returning charge amount is adapted to therewith.That is feeding quantity and yield difference are bigger, then return Doses is more, and the control of returning charge amount is more appropriate 5%~45%.
Wherein, the control of Vertical Mill technique neutrality mill grinding roller pressure is in 3~7MPa.The inlet outlet pressure differential control of vertical mill exists 1.2kPa~2.1kPa can be such that iron preferably enters in returning charge, reduce the iron content in the fine powder product of discharge port output.
Wherein, the magnetic field strength that returning charge surface is controlled in magnetic separation step is 400Gs~800Gs.Suitable magnetic field strength energy The iron in returning charge is preferably isolated, the returning charge after enabling magnetic separation continuously adds the feed inlet of vertical mill, reduces in product fine powder Iron content.
Wherein, the clinker containing titanium carbide is containing TiO2Clinker carries out the product that high temperature cabonization reacts with carbonaceous reducing agent. The carbonaceous reducing agent is anthracite or coke powder.Titanium carbide clinker will generally be contained tentatively be crushed to and say and be crushed to 10mm or less It is handled afterwards in addition vertical mill.
Technical solution of the present invention is further described in detail by the following examples.
Embodiment one
TiO will be contained222% blast furnace slag is reacted with coke powder at high temperature, and the clinker containing titanium carbide 14.12%, slag is made In contain Fe 4.2%;After clinker containing titanium carbide is crushed to 10mm or less, it is sent into Vertical Mill equipment and is crushed, the production of vertical mill It can be 5t/h.It is 5.3t/h (being calculated with butt) that delivery rate is adjusted during Vertical Mill.Control grinding roller of vertical mill pressure be 3~ 4MPa, vertical mill inlet outlet pressure differential are 1.2kPa~1.4kPa.It realizes that returning charge is the 5~6% of feeding coal, measures Fe in returning charge Mass fraction is 41.3%, and the size of current of magnetic separator above adjustment return conveyer, controlling magnetic field strength in returning charge is 400Gs. After system is stablized, measuring Fe content in finished product clinker containing titanium carbide is 1.8%, while the mass fraction of Fe is in magnetic separation iron powder 74.9%.
Embodiment two
Containing TiO222% blast furnace slag is reacted with coke powder at high temperature, the obtained slag containing titanium carbide 14.12%, in slag Containing Fe 4.2%;It after carbide slag is crushed to 10mm or less, is sent into Vertical Mill equipment and is crushed, the production capacity of Vertical Mill is 5t/h.It is vertical By adjusting delivery rate as 7.5t/h (calculating with butt) during mill.Control grinding roller pressure is 5~6MPa, vertical mill passes in and out Mouth pressure difference is 1.6kPa~1.8kPa.Realize that returning charge is the 30~33% of feeding coal, the mass fraction for measuring Fe in returning charge is 4.9%.The size of current of magnetic separator above return conveyer is adjusted, controlling magnetic field strength in returning charge is 650Gs.After system is stablized, Measure finished product containing carbonization Titanium slag in Fe content be 2.3%, while in magnetic separation iron powder Fe mass fraction 51.7%.
Embodiment three
Containing TiO222% blast furnace slag is reacted with coke powder at high temperature, the obtained slag containing titanium carbide 14.12%, in slag Containing Fe 4.2%;It after carbide slag is crushed to 10mm or less, is sent into Vertical Mill equipment and is crushed, the production capacity of Vertical Mill is 5t/h.It is vertical By adjusting delivery rate as 9t/h (calculating with butt) during mill.Control grinding roller pressure is 6~7MPa, vertical mill is imported and exported Pressure difference is 1.8kPa~2.1kPa, realizes that returning charge is the 43~45% of feeding coal, the mass fraction for measuring Fe in returning charge is 3.0%.The size of current of magnetic separator above return conveyer is adjusted, controlling magnetic field strength in returning charge is 800Gs.After system is stablized, Measure finished product containing carbonization Titanium slag in Fe content be 2.5%, while in magnetic separation iron powder Fe mass fraction 42.3%.

Claims (6)

1. the method that clinker containing titanium carbide removes iron, it is characterised in that: crush the Titanium slag containing carbonization using Vertical Mill technique, Vertical Mill crushes Control returning charge amount is the 5%~45% of feeding coal in the process, gained returning charge is carried out iron removal by magnetic separation, the returning charge after iron removal by magnetic separation is sent Enter feed system to continue to crush, the fine powder crushed is sent through vertical mill discharge port to collection system, obtains qualified titanium carbide furnace Slag.
2. according to the method described in claim 1, it is characterized by: the Vertical Mill technique neutrality mill grinding roller pressure be 3~ 7Mpa。
3. according to the method described in claim 1, it is characterized by: the inlet outlet pressure differential of vertical mill is in the Vertical Mill technique 1.2kPa~2.1kPa.
4. according to the method described in claim 1, it is characterized by: the magnetic field strength on returning charge surface is in the magnetic separation step 400Gs~800Gs.
5. according to the method described in claim 1, it is characterized by: the clinker containing titanium carbide is containing TiO2Clinker and carbonaceous are also Former agent carries out the product of high temperature cabonization reaction.
6. according to the method described in claim 5, it is characterized by: the carbonaceous reducing agent is anthracite or coke powder.
CN201811004235.2A 2018-08-30 2018-08-30 The method that clinker containing titanium carbide removes iron CN109174318A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1283706A (en) * 1999-08-10 2001-02-14 中南工业大学 Process for preparing Ti-enriched material from ilmenite concentrate
CN103418484A (en) * 2013-08-12 2013-12-04 江苏融达新材料股份有限公司 Closed-loop feedback iron-selecting system for vertical mill
CN203577975U (en) * 2013-08-21 2014-05-07 北矿机电科技有限责任公司 Overload starting device of vertical mill machine for wet-type ore grinding
CN105256152A (en) * 2015-10-28 2016-01-20 攀钢集团攀枝花钢铁研究院有限公司 Method for quick reduction smelting of titaniferous furnace slag
CN106990763A (en) * 2017-04-20 2017-07-28 浙江大学 A kind of Vertical Mill operation regulator control system and method based on data mining
CN107051705A (en) * 2017-04-12 2017-08-18 山西太钢不锈钢股份有限公司 Slag powders outer circulation iron removal system and method
CN108405076A (en) * 2018-03-06 2018-08-17 攀钢集团攀枝花钢钒有限公司 Vertical mill, carbonization blast furnace slag breaking method and system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1283706A (en) * 1999-08-10 2001-02-14 中南工业大学 Process for preparing Ti-enriched material from ilmenite concentrate
CN103418484A (en) * 2013-08-12 2013-12-04 江苏融达新材料股份有限公司 Closed-loop feedback iron-selecting system for vertical mill
CN203577975U (en) * 2013-08-21 2014-05-07 北矿机电科技有限责任公司 Overload starting device of vertical mill machine for wet-type ore grinding
CN105256152A (en) * 2015-10-28 2016-01-20 攀钢集团攀枝花钢铁研究院有限公司 Method for quick reduction smelting of titaniferous furnace slag
CN107051705A (en) * 2017-04-12 2017-08-18 山西太钢不锈钢股份有限公司 Slag powders outer circulation iron removal system and method
CN106990763A (en) * 2017-04-20 2017-07-28 浙江大学 A kind of Vertical Mill operation regulator control system and method based on data mining
CN108405076A (en) * 2018-03-06 2018-08-17 攀钢集团攀枝花钢钒有限公司 Vertical mill, carbonization blast furnace slag breaking method and system

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