Apa jinise induksi tungku bahan lining?

Induction furnace lining material is also called induction furnace refractory material, induction furnace dry vibrating material, induction furnace knotting material, induction furnace ramming material, divided into acidic, neutral, and alkaline lining materials. The acidic lining material is made of high-purity quartz, molten Quartz is the main raw material, composite additives are used as the sintering agent; the neutral furnace lining material is made of alumina and high aluminum materials as the main raw material, and the composite additive is used as the sintering agent; the basic furnace lining material is made of high-purity fused corundum and high-purity electric Fused magnesia and high-purity spinel are used as main raw materials, and composite additives are used as sintering agents.

Ana telung jinis bahan lapisan tungku induksi. Salah sijine yaiku lapisan asam, sing dibentuk dening ramming garing saka wedhi kuarsa, lan agen ikatan yaiku boraks utawa asam borat; liyane ramming garing lan ngecor saka magnesia, lan agen iketan uga boraks utawa asam boric. Salah sijine yaiku lapisan tungku netral, sing ditabuh lan dibentuk saka klinker bauksit alumina dhuwur. Ing taun-taun pungkasan, kanthi pangembangan teknologi lan muncule macem-macem bahan anyar, akeh bahan lapisan anyar uga muncul ing bahan lapisan tungku induksi.

1. Acid lining

Lining tungku asam utamane pasir kuarsa, sing murah, disebarake kanthi akeh, insulasi sing apik, syarat konstruksi sing sithik, sawetara cacat nalika digunakake, lan produksi sing relatif stabil. Nanging, wedhi kuarsa nduweni refractoriness kurang lan ora bisa nyukupi syarat kanggo tungku induksi skala gedhe. Lan ana owah-owahan fase sekunder sajrone proses pemanasan, stabilitas standar kurang, stabilitas kimia ora becik, lan mung reaksi karo slag kanggo mbentuk karat. Kanggo nyegah cacat kasebut, kuarsa sing digabung bisa digunakake. Isine dhuwur, isi silikon dioksida luwih saka 99%, refractoriness maju sacara signifikan, cedhak karo titik leleh, lan ora ana owah-owahan fase sekunder nalika dadi panas, ora ana owah-owahan standar pemanasan, lan kejut termal stabil. . Jinis uga wis maju banget.

2. Neutral lining

The fused corundum is used as the lining of the induction furnace. Because the melting point of white corundum is as high as 2050℃, the hardness is as high as 8. It is wear-resistant, high-temperature resistant, and has better chemical stability than quartz. Suitable for high temperature cast steel or large furnace lining. The characteristic is that it also has the defects of phase change and large thermal expansion coefficient. In practice, the participation of spinel powder can significantly advance the corrosion resistance and standard stability.

3. Alkaline lining

Lapisan tungku alkali tradisional dibentuk dening ramming garing saka magnesia. Kauntungan kasebut yaiku refractoriness dhuwur, cedhak karo 2800 ℃, cacat kasebut yaiku koefisien ekspansi gedhe, gampang retak, lapisan magnesia tahan karat, umur dawa, rega murah, lan akeh digunakake. Melu bubuk korundum putih utawa bubuk spinel kanthi signifikan ningkatake umur layanan.

4. Lapisan spinel

Lapisan spinel minangka jinis bahan lapisan anyar. Iki digawe saka alumina lan magnesia, dipecat ing suhu dhuwur utawa dibentuk dadi spinel kanthi fusi listrik, lan banjur ngasilake macem-macem standar partikel kaya sing dibutuhake. Iki digunakake minangka lapisan tungku induksi, lan agen ikatan isih. Iki minangka arah pangembangan lapisan tungku induksi skala gedhe lan lapisan tungku suhu dhuwur. Akeh bahan lapisan tungku sing diimpor kalebu jinis iki.

5. New technology and new materials of furnace lining materials

① Participate in ultra-fine powder (mostly in a few microns) in traditional furnace lining materials, which can improve the corrosion resistance and thermal shock stability of furnace lining materials, such as silica micro powder, alumina micro powder, white corundum micro powder, spinel micro powder, etc.

②Dry molding. Traditional furnace linings are all formed by dry powder and dry ramming. The defect is that it is easy to chromatograph and constitute defects such as empty. In the semi-dry method, 2% to 3% water mixing is used to reduce chromatography, and the integrity is good, and it will not pose too much harm. It only needs a little longer in the low-temperature oven.

③The semi-dry molding process participates in pure calcium aluminate cement, with pure acidic or neutral furnace lining; while in alkaline furnace lining, it participates in magnesium oxide, sodium hexametaphosphate, etc.