LF(V) work requirement is as follows:
(1) fine temperature is as high as 1700 ℃ and heat time is long, if with the 40tLF(V) that electric stove cooperates every furnace heats,time makes an appointment with 13 ~26min, blame with heat place temperature taller.
(2) is slaggy erode badly give priority to with basic slag, alkalinity is fluctuant between 2~3.5.
(3) bottom blows argon agitate, argon throughput 50L/min, intense tuck diveseethe falls on molten steel, erode to liner of broken bits line for serious.
(4) major while is in the operation below stronger reducing atmosphere, the reducer such as pink of carbolic pink, aluminium powder, silicon is joined when smelt.
(Time of the fine below 5) vacuum is long, average every furnace amounts to many minutes 30, fall in ultimate pressure (67~200Pa) still needs to maintain
I 5min.
(6) intermittence is operated, thermal shock is frequent.
B LF(V) lining mars an element
LF(V) lining mars an element following;
(1) chemistry reaction and frit corrode, below high temperature, molten steel and slaggy diffuse to the middle of fireproof liner, action of coinstantaneous frit corrode. Slaggy with bricky surface contact, sometimes one furnace is as long as 90mm, the chemistry of the CaO in fluid, SiO2 and CaF2 and brick reacts, make bricky face is formed slaggy permeate a layer, and matrix fills up for silicate place. The silicate of low melting point that grain brim forms, have not stable C2S(melting point 2130 ℃ ) and C3MS2(1540 ℃ is decomposed) , CMS(melting point 1450 ℃ ) with Huang Changshi solid solution (2CaO • MgO •2SiO2-2CaO * Al2O3, siO2) , cause liner to be marred discontinuously.
(The volatilization below vacuum of 2) high temperature. Press the stability that alkalescent and fireproof material issues in high temperature, c>CaO>CaO • MgO>MgO, relatively good by this ordinal goods that contain calcium. But fireproof material can be solved quickly below high temperature vacuum leave and volatilize, the volatilization of fireproof material speed and the square root that vapour controls product of force and molecular quantity, temperature become direct ratio. If pass,spend in vacuum 666. 6Pa, 1680 ℃ , the experiment below 4h condition determined the volatilization of different and fireproof material 〕 of speed 〔 X10 4g/ (cm2·min) , its are orderly: Electric frit magnesian chromium is qualitative (12. 0)> magnesium is qualitative (> 5. 4)> zirconium stone (3. 9)> is limy (0. 6) > dolomite (0.4) , the dolomite that shows magnesian calcium is qualitative falls in vacuum condition, volatilize rate is relatively minor.
CaO>CaO • MgO>MgO, relatively good by this ordinal goods that contain calcium. But fireproof material can be solved quickly below high temperature vacuum leave and volatilize, the volatilization of fireproof material speed and the square root that vapour controls product of force and molecular quantity, temperature become direct ratio. If pass,spend in vacuum 666. 6Pa, 1680 ℃ , the experiment below 4h condition determined the volatilization of different and fireproof material 〕 of speed 〔 X10 4g/ (cm2·min) , its are orderly: Electric frit magnesian chromium is qualitative (12. 0)> magnesium is qualitative (> 5. 4)> zirconium stone (3. 9)> is limy (0. 6) > dolomite (0.4) , the dolomite that shows magnesian calcium is qualitative falls in vacuum condition, volatilize rate is relatively minor.
CaO • MgO>MgO, relatively good by this ordinal goods that contain calcium. But fireproof material can be solved quickly below high temperature vacuum leave and volatilize, the volatilization of fireproof material speed and the square root that vapour controls product of force and molecular quantity, temperature become direct ratio. If pass,spend in vacuum 666. 6Pa, 1680 ℃ , the experiment below 4h condition determined the volatilization of different and fireproof material 〕 of speed 〔 X10 4g/ (cm2·min) , its are orderly: Electric frit magnesian chromium is qualitative (12. 0)> magnesium is qualitative (> 5. 4)> zirconium stone (3. 9)> is limy (0. 6) > dolomite (0.4) , the dolomite that shows magnesian calcium is qualitative falls in vacuum condition, volatilize rate is relatively minor.
MgO, relatively good by this ordinal goods that contain calcium. But fireproof material can be solved quickly below high temperature vacuum leave and volatilize, the volatilization of fireproof material speed and the square root that vapour controls product of force and molecular quantity, temperature become direct ratio. If pass,spend in vacuum 666. 6Pa, 1680 ℃ , the experiment below 4h condition determined the volatilization of different and fireproof material 〕 of speed 〔 X10 4g/ (cm2·min) , its are orderly: Electric frit magnesian chromium is qualitative (12. 0)> magnesium is qualitative (> 5. 4)> zirconium stone (3. 9)> is limy (0. 6) > dolomite (0.4) , the dolomite that shows magnesian calcium is qualitative falls in vacuum condition, volatilize rate is relatively minor.
Magnesium is qualitative (> 5. 4)> zirconium stone (3. 9)> is limy (0. 6) > dolomite (0.4) , the dolomite that shows magnesian calcium is qualitative falls in vacuum condition, volatilize rate is relatively minor.
5.4)> zirconium stone (3. 9)> is limy (0. 6) > dolomite (0.4) , the dolomite that shows magnesian calcium is qualitative falls in vacuum condition, volatilize rate is relatively minor.
Zirconium stone (3. 9)> is limy (0. 6) > dolomite (0.4) , the dolomite that shows magnesian calcium is qualitative falls in vacuum condition, volatilize rate is relatively minor.
Limy (0. 6) > dolomite (0.4) , the dolomite that shows magnesian calcium is qualitative falls in vacuum condition, volatilize rate is relatively minor.
Dolomite (0.4) , the dolomite that shows magnesian calcium is qualitative falls in vacuum condition, volatilize rate is relatively minor.
(3) is eroded slaggily. Contain in broken bits permeate the CaO with powerful force and CaF2. LF(V) slag chemistry is comprised (CaO45. 54% , siO222- 57% , mgO10. 30% , cr2O3 O.11% , al203 14. 82% , caF2 4.02% , mnO 0.58% , feO 0.82%) .
Below high temperature, the fluid photograph channel that the CaO in slag and SiO2 reach foreign matter place to form along the stoma of be well versed in of bricky matrix part, cranny is migratory to freezing point, formed the photograph of mine of low melting point that gives priority to with silicate, changed constituent structure of the brick, produced degenerative layer. When temperature leap, form a structure to flake. The invades a quantity to follow air hole aperture with slaggy and slaggy exterior tension increase and contact the extension of time and increase, increase along with slaggy viscosity and reduce. To the fine broken bits with calcic high content, lining material can choose the magnesian calcium that suits with slag constituent photograph to pledge character, fight sex of broken bits corrode and durable sex in order to increase.
(4) thermal shock and machinery erode. LF(V) hearth ministry blows argon to have strong mix, average the time blowing argon of every furnace is as long as Ih above, argon throughput Q=5OL/min, unit agitate can be calculated for 220W/m3. Three-phase electric arc heats, electrode is apart from to Bao Bi only 0.6m. Below high temperature Bao Bi is eroded by sharp machine with thermal shock.
Wrap heatproof concussion sex of the wall, depend on greatly the high temperature plasticity of photograph of the 2nd solid in fireproof material. According to data report, the CaO of 3% is joined in MgO, can make plasticity is out of shape raise 10-1.61 by 10-2.90. ' because this, of goods of rich magnesian dolomite thermoplastic simple product of good Yu Mei. Zhengzhou flourish fills fireproof material to regard manufacturer of the adventitious of high quality fireproof material as the home, have rich manufacturing experience and practice base, stand in the forward position that the industry expands from beginning to end, pay attention to innovation of science and technology, increase the development strength to new product ceaselessly, in ensuring flourish fills material to be able to apply to more furnace kiln projects, bring good news for more projects. Flourish fills network of fireproof material official: Http://www.glzcj.com
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