The correct use of the inner lining material of the induction furnace and the method of building the furnace

1. Apa yang diperkenalkan di sini adalah: Bahan pelapis dinding tungku asam kuarsa (bahan pelapis dinding tungku asam). Bahan ini adalah campuran serudukan kering pra-campur. Kandungan binder, anti cracking agent dan stabilizer sudah disiapkan sesuai kebutuhan, dan pengguna bisa langsung menggunakannya. Perhatian khusus: pengguna tidak diperbolehkan menambahkan bahan dan air saat menggunakan. Produk ini cocok untuk peleburan besi abu-abu, besi putih, baja karbon, baja gong tinggi, baja krom tinggi, baja paduan, baja partikel, bahan pencuci, tembaga, aluminium dan bahan lainnya di tungku induksi.

2. Furnace building, oven and sintering process

Before dry-knotting the furnace wall lining, first lay a layer of asbestos cloth in the furnace coil insulation layer, and manually level and compact each layer of material during laying.

Knotted furnace bottom: The thickness of the furnace bottom is about 200mm-280mm, and the sand is filled in two to three times to prevent uneven density everywhere when manual knotting, and the furnace wall 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. Multi-person operation is divided into shifts, 4-6 people per shift, 30 minutes substitutions each time knotting, around the furnace Rotate slowly and apply evenly to avoid uneven density.

Ketika simpul di bagian bawah tungku mencapai ketinggian yang dibutuhkan, cetakan wadah dapat ditempatkan dengan mengikisnya hingga rata. Dalam hal ini, perhatian harus diberikan untuk memastikan bahwa cetakan wadah konsentris dengan kumparan, disesuaikan secara vertikal ke atas dan ke bawah, dan bentuknya sedekat mungkin dengan bagian bawah tungku yang dibangun. Setelah menyetel jarak bebas periferal menjadi sama, gunakan tiga irisan kayu untuk menjepit, dan beban pengangkat tengah ditekan untuk menghindari dinding tungku terbentur. Perpindahan pasir kuarsa terjadi selama knotting.

Knotting furnace wall: The thickness of the inner lining of the furnace wall is 90mm-120mm, adding dry knotting material in batches, the cloth is uniform, the thickness of the filler is not more than 60mm, and the knotting is 15 minutes (manual knotting) until it is flush with the upper edge of the coil . The crucible mold is not taken out after the knotting is completed, and it plays a role of reaction heating during drying and sintering. If you want to take out the crucible mold, wrap the outer wall of the crucible mold with 2-3 layers of newspaper before knotting the furnace wall and wrap it tightly with tape. After the knotting, the furnace wall is heated up to 900 degrees, and the newspaper is smoked. Take out the crucible mold quickly. The iron barrel with the diameter of 10-15 cm and the height of the furnace mouth is flat and the iron pin is used for the reaction heating during drying and sintering.

Baking and sintering specifications: in order to obtain the three-layer structure of the furnace wall lining, the baking and sintering process is roughly divided into three stages: pay attention to the iron pin and small iron added in the furnace during the baking and sintering Do not add large pieces of iron, pointed or toothed iron.

Tahap pemanggangan: Panaskan cetakan krus pada suhu 900 °C selama 20 menit dengan laju 200 pengawetan panas selama 20 menit, 300 pengawetan panas selama 20 menit, dan 400 pengawetan panas selama 20 menit. Tujuannya adalah untuk benar-benar menghilangkan kelembaban di lapisan dinding tungku.

Semi-sintering stage: Keep the temperature at 400 for 20 minutes, 500 for 20 minutes, and 600 for 20 minutes. The heating rate must be controlled to prevent cracks.

Tahap sintering lengkap: sintering suhu tinggi, struktur wadah yang disinter adalah dasar untuk meningkatkan masa pakainya. Suhu sintering berbeda, ketebalan lapisan sintering tidak mencukupi, dan masa pakai berkurang secara signifikan.

In the 2T induction furnace, about 950 kilograms of iron pins are added to enhance the heating effect of the coil during the baking process. As the baking and sintering continue, a relatively stable electromagnetic force is generated through low-power transmission to stir the molten iron to fill the furnace. The furnace temperature is raised to 1700 degrees to keep the temperature for 60 minutes, so that the inner lining of the furnace wall is heated evenly up and down. Strictly control the temperature of the three phase transition zones of quartz sand, promote the full phase transition of quartz sand, and improve the first sintering strength of the furnace wall lining.

3. Ringkasan

Untuk masa pakai lapisan dinding tungku tungku induksi, selain memastikan lapisan dinding tungku tiga lapis yang lengkap dan masuk akal, perhatian juga harus diberikan pada operasi biasa. Norma pemanggangan dan sintering ilmiah, proses operasi yang ketat, dapat memperpanjang umur tungku.

4. Metode pengemasan dan penyimpanan

Kertas tahan lembab multi-layer dan kemasan film bagian dalam 25kg/tas, simpan di tempat yang kering untuk mencegah penyerapan air. Rekomendasi umur simpan terlalu bagus