Indlela yokuphucula ukumelana nobushushu be ukuchithwa kwesithando somlilo lining? After reading it, I have benefited a lot!

The high temperature performance of the furnace lining mainly depends on the physical, chemical properties and mineral composition of the refractory materials used. Under the premise of selecting the raw and auxiliary materials, the sintering process is the key to obtain a good microstructure of the furnace lining to give full play to its high temperature resistance. Process. The degree of densification of lining sintering is related to the chemical composition, particle size ratio, sintering process and sintering temperature of the refractory materials.

Inkqubo yokwakha iziko

1. Susa iphepha lemica xa usakha isithando somlilo.

2. Isanti yekristale yequartz yokwakhiwa kwesithando somlilo iphathwa ngolu hlobo lulandelayo:

(1) Hand selection: mainly remove lumps and other impurities;

(2) Ukwahlulwa kwemagnethi: ukungcola kwamagnetic kufuneka kususwe ngokupheleleyo;

3. Isixhobo se-ramming eyomileyo: kufuneka yomiswe kancinci, ubushushu bomise bube yi-200℃-300℃, kwaye ukugcinwa kobushushu kungaphezulu kweeyure ezi-4.

4. Ukukhethwa kwe-binder ye-intermediate frequency electric furnace: sebenzisa i-boric anhydride (B2O3) endaweni ye-boric acid (H3BO3) njenge-binder, kwaye imali eyongezelelweyo yi-1.1% -1.5%.

Ukukhethwa kunye nobungakanani bezinto zokwakha eziko:

1. Ukukhethwa kwezinto zesithando somlilo: Kufuneka kuqatshelwe ukuba ayizizo zonke iisanti ze-quartz ezine-SiO2≥99% ezingasetyenziselwa njengezinto zokufakelwa kwesithando somlilo. Into ebalulekileyo yisayizi yeenkozo zekristale ye-quartz. Ukuqina kweenkozo zekristale, iziphene ezimbalwa ze-lattice, ngcono. (Umzekelo, isanti ye-crystal quartz i-SiO2 inobunyulu obuphezulu, obumhlophe kunye nokubonakala okubonakalayo.) Ubukhulu bomthamo wesithando somlilo, ukuphakama kweemfuno ze-crystal grains.

2. Proportion: The ratio of quartz sand for furnace lining: 6-8 mesh 10%-15%, 10-20 mesh 25%-30%, 20-40 mesh 25%-30%, 270 mesh 25%-30%.

Inkqubo ye-Sintering kunye neqondo lokushisa lokutshisa:

1. I-knotting ye-lining: umgangatho we-knotting we-lining uhambelana ngokuthe ngqo nomgangatho we-sintering. Xa i-knotting, i-sand particle size distribution is uniform kwaye akukho lucalucalulo lwenzekayo. Uluhlu lwesanti olunamaqhina lunobuninzi obuphezulu, kwaye amathuba okuqhekeka emva kokucwiliswa kwe-sintering ayancitshiswa, okunenzuzo ekuphuculeni ubomi benkonzo ye-furnace induction.

2. Knotted furnace bottom: The thickness of the furnace bottom is about 280mm, and the sand is filled in four times to prevent uneven density everywhere when manual knotting, and the furnace lining after baking and sintering is not dense. Therefore, the thickness of the feed must be strictly controlled. Generally, the thickness of the sand filling is not more than 100mm/each time, and the furnace wall is controlled within 60mm. Multiple people are divided into shifts, 4-6 people per shift, and 30 minutes for each knot to replace, around the furnace Rotate slowly and apply evenly to avoid uneven density.

3. Udonga lwesithando somlilo: ubukhulu bomgca wesithando somlilo yi-110-120mm, ukongeza izinto ezomileyo zokudibanisa kwiibhetshi, ilaphu lifanayo, ubukhulu bomhluzi abukho ngaphezu kwe-60 mm, kwaye i-knotting yimizuzu eyi-15 (i-knotting ngesandla. ) ide ilingane nomphetho ophezulu weringi yokungeniswa kunye. Isikhunta se-crucible asithathwanga emva kokuba i-knotting igqityiwe, kwaye isebenza njengokufudumala kwe-induction ngexesha lokumisa kunye ne-sintering.

4. Iimpawu zokubhaka kunye ne-sintering: Ukuze ufumane isakhiwo esinemigangatho emithathu yesithando somlilo, inkqubo yokubhaka kunye ne-sintering inokwahlulwa ngokufanelekileyo ibe ngamanqanaba amathathu:

5. Baking stage: heating the crucible mold to 600°C at the speed of 25°C/h and 50°C/h respectively, and keep it for 4h, the purpose is to completely remove the moisture in the furnace lining.

6. Isigaba se-semi-sintering: ukufudumeza kwi-50 ° C / h ukuya kwi-900 ° C, ukubamba i-3h, ukufudumeza kwi-100 ° C / h ukuya kwi-1200 ° C, ukubamba i-3h, izinga lokushisa kufuneka lilawulwe ukukhusela ukuqhekeka.

7. Inqanaba elipheleleyo le-sintering: Ngexesha lokushisa okuphezulu, isakhiwo se-sintered ye-intermediate frequency crucible yesithando sombane sisisiseko sokuphucula ubomi benkonzo. Ukushisa kwe-sintering kuyahluka, ubukhulu be-sintering layer abunelanga, kwaye ubomi benkonzo buyancipha kakhulu.