Telung Proses Leaching Bijih Emas Umum

ing Proses Leaching saka bahan, adhedhasar beda ing arah aliran saka bahan leached lan reagen leaching, telung pangolahan leaching bisa dikenali.

1. Co-current Leaching

Ing co-current leaching, bahan leached lan reagen leaching mili ing arah sing padha (Gambar 1). Cara iki bisa ngasilake leachate kanthi isi komponen target sing relatif dhuwur lan mbutuhake konsumsi reagen leaching sing luwih murah. Nanging, kacepetan leaching iku alon. Wektu leaching sing luwih dawa dibutuhake kanggo entuk tingkat leaching sing dhuwur.

2. Cross - leaching saiki

Ing leaching lintas-arus, bahan leached kapisah leached karo sawetara bagéan saka reagen leaching seger. Leachate sing dipikolehi saka saben operasi leaching dikirim seragam kanggo proses sabanjure (Gambar 2). Leaching salib saiki nduweni kecepatan leaching sing relatif cepet lan wektu leaching sing cendhak, nyebabake tingkat leaching sing dhuwur. Nanging, volume leachate gedhe, kanthi konsentrasi reagen residual sing dhuwur. Akibaté, konsumsi reagen cukup akeh, lan isi komponen target ing leachate relatif kurang.

3. Counter - Leaching saiki

Ing counter-current leaching, bahan leached lan reagen leaching pindhah ing arah ngelawan. Tegese, bahan sing wis entek sawise sawetara operasi leaching kena kontak karo leachate seger, nalika bahan leached asli kontak leachate (Gambar 3). Counter - leaching saiki bisa ngasilake leachate kanthi kandungan komponen target sing dhuwur lan nggunakake reagen sisa ing leachate, saéngga nyuda konsumsi agen leaching. Nanging, kacepetan leaching luwih murah tinimbang leaching cross-current. Jumlah tahap leaching sing luwih akeh dibutuhake kanggo entuk tingkat leaching sing dhuwur.

Leaching tank percolation bisa nggunakake proses leaching co-current, cross-current, utawa counter-current. Heap leaching lan in-situ leaching umume nggunakake proses co-current siklik leaching. Leaching sing diaduk terus-terusan biasane nganggo proses leaching saiki. Yen cross-current utawa counter-current leaching bakal digunakake, operasi pamisahan padhet-cair kudu ditambahake ing antarane saben tahap. Batch-operated stirred leaching umume co-current leaching, nanging cross-current utawa counter-current leaching uga bisa ditrapake. Nanging, pamisahan padhet - cairan dibutuhake sawise saben operasi leaching, nggawe kompleks operasi lan kurang umum digunakake ing produksi. Leaching percolation bisa langsung entuk lindi bening, dene slurry saka leaching sing diaduk kudu ngalami pemisahan padhet - cair kanggo entuk lindi sing cetha utawa slurry encer sing ngemot partikel bijih cilik kanggo proses sabanjure.