CN105152652A - Plate-shaped Cr with ferrochrome slag as main material7C3And method for preparing the same - Google Patents

Plate-shaped Cr with ferrochrome slag as main material7C3And method for preparing the same Download PDF

Info

Publication number
CN105152652A
CN105152652A CN201510647704.2A CN201510647704A CN105152652A CN 105152652 A CN105152652 A CN 105152652A CN 201510647704 A CN201510647704 A CN 201510647704A CN 105152652 A CN105152652 A CN 105152652A
Authority
CN
China
Prior art keywords
slag
ferrochrome
tabular
ferrochrome slag
major ingredient
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201510647704.2A
Other languages
Chinese (zh)
Other versions
CN105152652B (en
Inventor
张寒
赵惠忠
田刚
何晴
高红军
赵鹏达
余俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jinzhou Jixin High Temperature Material Co ltd
Original Assignee
Jinzhou Jixin High Temperature Material Co ltd
Wuhan University of Science and Engineering WUSE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jinzhou Jixin High Temperature Material Co ltd, Wuhan University of Science and Engineering WUSE filed Critical Jinzhou Jixin High Temperature Material Co ltd
Priority to CN201510647704.2A priority Critical patent/CN105152652B/en
Publication of CN105152652A publication Critical patent/CN105152652A/en
Application granted granted Critical
Publication of CN105152652B publication Critical patent/CN105152652B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention relates to a plate-shaped Cr using ferrochromium slag as a main material7C3And a method for preparing the same. The technical scheme is as follows: mixing materials according to the mass ratio of the ferrochrome slag to the silicon carbide of 100: 0.5-1, and ball-milling the materials in a ball mill until the particle size is less than or equal to 100 mu m to obtain ferrochrome slag powder; mixing the materials according to the mass ratio of the ferrochrome slag powder to the carbon powder of 100: 2.5-4, and mixing for 0.3-0.5 hours to obtain mixed powder; adding the mixed powder into a vacuum arc furnace, heating to 1580-1760 ℃, and preserving heat for 3-5 hours; removing the upper slag layer, cooling to room temperature, and crushing to obtain plate-shaped Cr with ferrochrome slag as main material7C3. The invention has the characteristics of simple process, low production cost and no special requirement on equipment, and the plate-shaped Cr prepared by the method7C3Not only has high purity and good crystallization, but also has complete growth and development of crystal grains and excellent densification degree.

Description

A kind of tabular Cr that is major ingredient with ferrochrome slag 7c 3and preparation method thereof
Technical field
The invention belongs to Cr 7c 3technical field.Be specifically related to a kind of tabular Cr being major ingredient with ferrochrome slag 7c 3and preparation method thereof.
Background technology
The slag that namely ferrochrome slag is smelted " chromium-iron alloy " produces.Take chromite as main raw material, employing metallic aluminium powder is reductive agent, and (generally at 1850 ~ 1900 DEG C) is widely use at present and the industrial technology means of maturation by thermite reaction preparation " chromium-iron alloy " under the high temperature conditions.Because slag is different from the proportion of ferrochrome, ferrochrome slag floats on " chromium-iron alloy " upper strata, therefore the two is easy to be separated.But discarded ferrochrome slag is only used for the exploitation of low product fire resistive material product by most enterprises after industrial refuse process or simple classification at present, not only causes the waste of resource, and Cr 6+formation and the also severe contamination environment that runs off.
Cr 7c 3that (by the impact of the changeable valence state of chromium element, the carbonized product of chromium also comprises Cr to one of carbonized product of chromium 3c 2and Cr 23c 6), have that fusing point is high, hardness is large, wear resistance is good, resistance to chemical attack is excellent and the feature such as high-temperature oxidation resistance is strong, the work-ing life of machine, parts can be improved, aerospace (engine) and petrochemical industry can be widely used in.But mainly Cr is concentrated on to the carbonized product preparation research of chromium 3c 2, this is in the carbonized product due to chromium, Cr 3c 2not only modulus of volume expansion is maximum, non-deformability is the strongest and hardness is the highest, and mechanics and thermodynamic stability best; Comparatively speaking, Cr 7c 3cr-C bonding strength maximum, and the anisotropy of crystal elasticity constant is the strongest, therefore Cr 7c 3toughness better.
At present, chromium carbide (Cr is prepared 3c 2, Cr 7c 3and Cr 23c 6) method be mainly direct carborization and carbothermic method.
Direct carborization prepares chromium carbide, mainly with carbon black carbon sources such as (or) nano carbon blacks and Cr powder for raw material, through mixing, compacting and shaping after, high temperature cabonization under the condition of reducing atmosphere or shielding gas.But adopt carbon black carbon sources such as (or) nano carbon blacks and Cr powder to be that chromium carbide prepared by raw material, the temperature of its solid state reaction is higher, and the conditional request such as control climate and conversion unit is higher; In addition, in the carbonation reaction of Cr powder, need to introduce other additive (Ti powder, Zr powder etc.) toward contact, easily produce new impurity phase (TiC or ZrC etc.) in the chromium carbide of preparation, reduce the purity of chromium carbide.
Carbothermic method prepares chromium carbide, mainly with carbon black (or the carbon source such as nano carbon black, resin) and Cr 2o 3for raw material, under vacuum in certain temperature thermal treatment after premix (or pre-burning).But adopt carbothermic method to prepare chromium carbide, its reaction product (Cr 3c 2, Cr 7c 3and Cr 23c 6) wayward, be difficult to prepare the chromium carbide that purity is high, thing phase composite is single; And carbon black carbon sources such as (or) nano carbon blacks, Cr 2o 3the cost of the raw material such as (or Cr powder) and other additive is higher, further increases the preparation cost of chromium carbide.
Summary of the invention
The present invention is intended to overcome prior art defect, and object is to provide that a kind of technique is simple, production cost is low and to the tabular Cr that with ferrochrome slag be major ingredient of equipment without particular requirement 7c 3preparation method.With prepared by the method with the tabular Cr that ferrochrome slag is major ingredient 7c 3not only purity is high and advantages of good crystallization, and Grain growth is complete and densification degree is excellent.
For achieving the above object, the step of the technical solution used in the present invention is:
Step one, be 100 ︰ (0.5 ~ 1) batchings by the mass ratio of ferrochrome Zha ︰ silicon carbide, then in ball mill, be milled to granularity≤100 μm, obtain ferrochrome ground-slag end.
Step 2, be 100 ︰ (2.5 ~ 4) batchings by the mass ratio of described ferrochrome ground-slag Mo ︰ carbon dust, mix 0.3 ~ 0.5 hour, obtain mixed powder.
Step 3, described mixed powder is added in vacuum arc fumace, be warming up to 1580 ~ 1760 DEG C, be incubated 3 ~ 5 hours; Remove upper strata scum layer again, cool to room temperature, fragmentation with the furnace, be namely able to the tabular Cr that ferrochrome slag is major ingredient 7c 3.
The slag that described ferrochrome slag produces for smelting chromium irons, the dominant of ferrochrome slag is corundum and aluminium picotite mutually; The main chemical compositions of ferrochrome slag is: Al 2o 3content is 80 ~ 85wt%, Cr 2o 3content is 10 ~ 15wt%, Fe 2o 3content≤1wt%.
SiC content >=the 99wt% of described silicon carbide.
Described carbon dust is carbon black or is coke, the C content >=95wt% of carbon dust.
Owing to adopting technique scheme, the present invention compared with prior art has following positively effect:
The present invention for main raw material, adds in vacuum arc fumace with solid waste-ferrochrome slag after ball milling and mixing, and to equipment without particular requirement, not only preparation technology is simple, and significantly can reduce production cost, is suitable for industrial production application.Low melt-phase in ferrochrome slag forms liquid phase under the high temperature conditions, changes " Gu solid-" carburizing reagent into " solid-liquid " carburizing reagent, increases speed of reaction, promotion Cr 7c 3crystallization and Grain growth.In addition, in " solid-liquid " system, due to Cr 7c 3proportion maximum and be sunken to furnace bottom, reduce and the contact of other component or reaction, improve Cr 7c 3purity, the prepared tabular Cr being major ingredient with ferrochrome slag 7c 3, true density is 6.28 ~ 6.58g/cm 3, therefore densification degree is excellent.
Therefore, the present invention has that technique is simple, production cost is low and to the feature of equipment without particular requirement, the tabular Cr being major ingredient with ferrochrome slag prepared by the method 7c 3not only purity is high and advantages of good crystallization, and Grain growth is complete and densification degree is excellent.
Embodiment
Below in conjunction with embodiment, the invention will be further described, the restriction not to its protection domain:
For avoiding repetition, first by as follows for the raw material Unify legislation involved by this embodiment, repeat no more in embodiment:
The slag that described ferrochrome slag produces for smelting chromium irons, the dominant of ferrochrome slag is corundum and aluminium picotite mutually; The main chemical compositions of ferrochrome slag is: Al 2o 3content is 80 ~ 85wt%, Cr 2o 3content is 10 ~ 15wt%, Fe 2o 3content≤1wt%.
SiC content >=the 99wt% of described silicon carbide.
Described carbon dust is carbon black or is coke, the C content >=95wt% of carbon black and coke.
embodiment 1
A kind of tabular Cr that is major ingredient with ferrochrome slag 7c 3and preparation method thereof.Described in the present embodiment, the concrete steps of preparation method are:
Step one, be 100 ︰ (0.5 ~ 0.7) batchings by the mass ratio of ferrochrome Zha ︰ silicon carbide, then in ball mill, be milled to granularity≤100 μm, obtain ferrochrome ground-slag end.
Step 2, be 100 ︰ (2.5 ~ 3.1) batchings by the mass ratio of described ferrochrome ground-slag Mo ︰ carbon black, mix 0.3 ~ 0.5 hour, obtain mixed powder.
Step 3, described mixed powder is added in vacuum arc fumace, be warming up to 1688 ~ 1760 DEG C, be incubated 3.0 ~ 3.8 hours; Remove upper strata scum layer again, cool to room temperature, fragmentation with the furnace, be namely able to the tabular Cr that ferrochrome slag is major ingredient 7c 3.
The tabular Cr being major ingredient with ferrochrome slag prepared by the present embodiment 7c 3, true density is 6.46 ~ 6.58g/cm 3, densification degree is excellent.
embodiment 2
A kind of tabular Cr that is major ingredient with ferrochrome slag 7c 3and preparation method thereof.Described in the present embodiment, the concrete steps of preparation method are:
Step one, be 100 ︰ (0.6 ~ 0.8) batchings by the mass ratio of ferrochrome Zha ︰ silicon carbide, then in ball mill, be milled to granularity≤100 μm, obtain ferrochrome ground-slag end.
Step 2, be 100 ︰ (2.8 ~ 3.4) batchings by the mass ratio of described ferrochrome ground-slag Mo ︰ carbon black, mix 0.3 ~ 0.5 hour, obtain mixed powder.
Step 3, described mixed powder is added in vacuum arc fumace, be warming up to 1652 ~ 1724 DEG C, be incubated 3.4 ~ 4.2 hours; Remove upper strata scum layer again, cool to room temperature, fragmentation with the furnace, be namely able to the tabular Cr that ferrochrome slag is major ingredient 7c 3.
The tabular Cr being major ingredient with ferrochrome slag prepared by the present embodiment 7c 3, true density is 6.40 ~ 6.52g/cm 3, densification degree is excellent.
embodiment 3
A kind of tabular Cr that is major ingredient with ferrochrome slag 7c 3and preparation method thereof.Described in the present embodiment, the concrete steps of preparation method are:
Step one, be 100 ︰ (0.7 ~ 0.9) batchings by the mass ratio of ferrochrome Zha ︰ silicon carbide, then in ball mill, be milled to granularity≤100 μm, obtain ferrochrome ground-slag end.
Step 2, be 100 ︰ (3.1 ~ 3.7) batchings by the mass ratio of described ferrochrome ground-slag Mo ︰ coke, mix 0.3 ~ 0.5 hour, obtain mixed powder.
Step 3, described mixed powder is added in vacuum arc fumace, be warming up to 1616 ~ 1688 DEG C, be incubated 3.8 ~ 4.6 hours; Remove upper strata scum layer again, cool to room temperature, fragmentation with the furnace, be namely able to the tabular Cr that ferrochrome slag is major ingredient 7c 3.
The tabular Cr being major ingredient with ferrochrome slag prepared by the present embodiment 7c 3, true density is 6.34 ~ 6.46g/cm 3, densification degree is excellent.
embodiment 4
A kind of tabular Cr that is major ingredient with ferrochrome slag 7c 3and preparation method thereof.Described in the present embodiment, the concrete steps of preparation method are:
Step one, be 100 ︰ (0.8 ~ 1.0) batchings by the mass ratio of ferrochrome Zha ︰ silicon carbide, then in ball mill, be milled to granularity≤100 μm, obtain ferrochrome ground-slag end.
Step 2, be 100 ︰ (3.4 ~ 4.0) batchings by the mass ratio of described ferrochrome ground-slag Mo ︰ coke, mix 0.3 ~ 0.5 hour, obtain mixed powder.
Step 3, described mixed powder is added in vacuum arc fumace, be warming up to 1580 ~ 1652 DEG C, be incubated 4.2 ~ 5.0 hours; Remove upper strata scum layer again, cool to room temperature, fragmentation with the furnace, be namely able to the tabular Cr that ferrochrome slag is major ingredient 7c 3.
The tabular Cr being major ingredient with ferrochrome slag prepared by the present embodiment 7c 3, true density is 6.28 ~ 6.40g/cm 3, therefore densification degree is excellent.
This embodiment compared with prior art has following positively effect:
This embodiment for main raw material, adds in vacuum arc fumace with solid waste-ferrochrome slag after ball milling and mixing, and to equipment without particular requirement, not only preparation technology is simple, and significantly can reduce production cost, is suitable for industrial production application.Low melt-phase in ferrochrome slag forms liquid phase under the high temperature conditions, changes " Gu solid-" carburizing reagent into " solid-liquid " carburizing reagent, increases speed of reaction, promotion Cr 7c 3crystallization and Grain growth.In addition, in " solid-liquid " system, due to Cr 7c 3proportion maximum and be sunken to furnace bottom, reduce and the contact of other component or reaction, improve Cr 7c 3purity, the prepared tabular Cr being major ingredient with ferrochrome slag 7c 3true density be 6.28 ~ 6.58g/cm 3, therefore densification degree is excellent.
Therefore, this embodiment has that technique is simple, production cost is low and to the feature of equipment without particular requirement, the tabular Cr being major ingredient with ferrochrome slag prepared by the method 7c 3not only purity is high and advantages of good crystallization, and Grain growth is complete and densification degree is excellent.

Claims (5)

1. the tabular Cr that is major ingredient with ferrochrome slag 7c 3preparation method, it is characterized in that the step of described preparation method is:
Step one, be 100 ︰ (0.5 ~ 1) batchings by the mass ratio of ferrochrome Zha ︰ silicon carbide, then in ball mill, be milled to granularity≤100 μm, obtain ferrochrome ground-slag end;
Step 2, be 100 ︰ (2.5 ~ 4) batchings by the mass ratio of described ferrochrome ground-slag Mo ︰ carbon dust, mix 0.3 ~ 0.5 hour, obtain mixed powder;
Step 3, described mixed powder is added in vacuum arc fumace, be warming up to 1580 ~ 1760 DEG C, be incubated 3 ~ 5 hours; Remove upper strata scum layer again, cool to room temperature, fragmentation with the furnace, be namely able to the tabular Cr that ferrochrome slag is major ingredient 7c 3.
2. the tabular Cr that is major ingredient with ferrochrome slag according to claim 1 7c 3preparation method, it is characterized in that the slag that described ferrochrome slag produces for smelting chromium irons, the dominant of ferrochrome slag is corundum and aluminium picotite mutually; The main chemical compositions of ferrochrome slag is: Al 2o 3content is 80 ~ 85wt%, Cr 2o 3content is 10 ~ 15wt%, Fe 2o 3content≤1wt%.
3. the tabular Cr that is major ingredient with ferrochrome slag according to claim 1 7c 3preparation method, it is characterized in that the SiC content>=99wt% of described silicon carbide.
4. the tabular Cr that is major ingredient with ferrochrome slag according to claim 1 7c 3preparation method, it is characterized in that described carbon dust is carbon black or for coke, the C content>=95wt% of carbon dust.
5. the tabular Cr that is major ingredient with ferrochrome slag 7c 3, it is characterized in that the described tabular Cr being major ingredient with ferrochrome slag 7c 3the tabular Cr being major ingredient with ferrochrome slag according to any one of claim 1 ~ 4 7c 3the tabular Cr being major ingredient with ferrochrome slag prepared by preparation method 7c 3.
CN201510647704.2A 2015-10-09 2015-10-09 Platy Cr 7C 3 taking ferrochrome slag as main material and preparation method thereof Active CN105152652B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510647704.2A CN105152652B (en) 2015-10-09 2015-10-09 Platy Cr 7C 3 taking ferrochrome slag as main material and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510647704.2A CN105152652B (en) 2015-10-09 2015-10-09 Platy Cr 7C 3 taking ferrochrome slag as main material and preparation method thereof

Publications (2)

Publication Number Publication Date
CN105152652A true CN105152652A (en) 2015-12-16
CN105152652B CN105152652B (en) 2017-04-12

Family

ID=54793775

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510647704.2A Active CN105152652B (en) 2015-10-09 2015-10-09 Platy Cr 7C 3 taking ferrochrome slag as main material and preparation method thereof

Country Status (1)

Country Link
CN (1) CN105152652B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106083094A (en) * 2016-06-27 2016-11-09 武汉科技大学 A kind of copper converter tuyere brick and preparation method thereof
CN106966730A (en) * 2017-03-24 2017-07-21 武汉科技大学 A kind of fine and close TiC materials and preparation method thereof
CN105541359B (en) * 2016-01-18 2018-01-12 武汉科技大学 A kind of ladle splash guard castable refractory and preparation method thereof
CN107759207A (en) * 2017-11-20 2018-03-06 武汉科技大学 Using aluminium chromium slag as blast furnace iron outlet groove castable of major ingredient and preparation method thereof
CN111500878A (en) * 2020-04-30 2020-08-07 渤海大学 Method for preparing chromium metal by using chromium carbide
CN111500921A (en) * 2020-04-29 2020-08-07 辽宁工业大学 Method for preparing ferrochromium nitride from aluminum-chromium waste residues

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0523848A (en) * 1991-07-19 1993-02-02 Toyota Motor Corp Cladding method for engine valve
CN203751141U (en) * 2014-03-14 2014-08-06 宁波甬抚机械有限公司 Cold-punching mold with repairable surface

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0523848A (en) * 1991-07-19 1993-02-02 Toyota Motor Corp Cladding method for engine valve
CN203751141U (en) * 2014-03-14 2014-08-06 宁波甬抚机械有限公司 Cold-punching mold with repairable surface

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105541359B (en) * 2016-01-18 2018-01-12 武汉科技大学 A kind of ladle splash guard castable refractory and preparation method thereof
CN106083094A (en) * 2016-06-27 2016-11-09 武汉科技大学 A kind of copper converter tuyere brick and preparation method thereof
CN106083094B (en) * 2016-06-27 2019-03-19 武汉科技大学 A kind of copper converter tuyere brick and preparation method thereof
CN106966730A (en) * 2017-03-24 2017-07-21 武汉科技大学 A kind of fine and close TiC materials and preparation method thereof
CN107759207A (en) * 2017-11-20 2018-03-06 武汉科技大学 Using aluminium chromium slag as blast furnace iron outlet groove castable of major ingredient and preparation method thereof
CN111500921A (en) * 2020-04-29 2020-08-07 辽宁工业大学 Method for preparing ferrochromium nitride from aluminum-chromium waste residues
CN111500878A (en) * 2020-04-30 2020-08-07 渤海大学 Method for preparing chromium metal by using chromium carbide

Also Published As

Publication number Publication date
CN105152652B (en) 2017-04-12

Similar Documents

Publication Publication Date Title
CN105152652A (en) Plate-shaped Cr with ferrochrome slag as main material7C3And method for preparing the same
Yu et al. Effect of Fe2O3 on non-isothermal crystallization of CaO–MgO–Al2O3–SiO2 glass
CN104496485B (en) The preparation method of a kind of silicon nitride or silicon nitride/silicon carbide composite granule
CN103695768B (en) A kind of W metallurgy and preparation method thereof
CN102644015A (en) Production method for vanadium nitride ferroalloy
CN108191439B (en) Refractory brick for blast furnace slag high-temperature carbonization electric furnace and preparation method thereof
CN103553619B (en) Titanium carbide and vanadium carbide composite material as well as production method and application thereof
Yin et al. Synthesis of Al2O3-SiC composite powders from coal ash in NaCl-KCl molten salts medium
CN106431416A (en) Zirconium carbide-zirconium diboride complex-phase ceramic powder synthesized through thermal explosion and preparation method thereof
Yang et al. Low-temperature synthesis of high-purity Ti3AlC2 by MA-SPS technique
CN106431370B (en) Using aluminium chromium slag as mullite synthesizing raw material of major ingredient and preparation method thereof
CN103602871B (en) A kind of high heat resistance, high strength cemented carbide and preparation method thereof
CN104909764B (en) A kind of modified complex phase Sialon ceramics, preparation method and the usage
CN102584181B (en) Method for preparing periclase-silicon carbide-carbon composite powder through in-situ reaction
CN102603328A (en) Fe-Si3N4-SiC complex phase refractory material as well as preparation and application thereof
CN106011598A (en) Preparation method of molybdenum steel additive
CN100408510C (en) Process of preparing heterogenous conducting Si3N4/Tin ceramic material tail iron ore
CN105063397B (en) A kind of preparation method of Cu-base composites
CN108314452A (en) A kind of carbonization chrome additive and preparation method thereof
CN101654369A (en) Method for preparing Fe-Sialon fire-proof raw materials
CN102808095A (en) Tungsten carbide titanium tantalum hafnium solid solution powder
CN104141096A (en) Hammer type crusher alloy hammer head and preparation method thereof
CN106939366A (en) Composite heating agent for carbon steel
CN103589930A (en) Stainless-steel-bonded powder metallurgy tool and preparation method thereof
CN106588024A (en) Preparation method for Al<7>O<3>N<5> combined corundum composite refractory material

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20220428

Address after: 121005 No.1 Hexiang Beili, Taihe District, Jinzhou City, Liaoning Province

Patentee after: JINZHOU JIXIN HIGH-TEMPERATURE MATERIAL Co.,Ltd.

Address before: 430081 construction of Qingshan District, Hubei, Wuhan

Patentee before: WUHAN University OF SCIENCE AND TECHNOLOGY

Patentee before: Jinzhou Jixin high temperature material Co., Ltd

TR01 Transfer of patent right