Demand for non-metallurgical Bauxite has continued to increase and a s terjemahan - Demand for non-metallurgical Bauxite has continued to increase and a s Bahasa Indonesia Bagaimana mengatakan

Demand for non-metallurgical Bauxit

Demand for non-metallurgical Bauxite has continued to increase and a set of applications have been developed. These include refractories, abrasives (including the recently development proppants), high aluminium cements, aluminium chemicals, activated bauxite and alumina.

Other uses include filters and pigments for plastics and elastomers; special calcined aluminas for ceramics, refractories, abrasives, soft burned calcined aluminas, hard burned calcined aluminas to produce alumina cements and calcium-aluminate cements.

Non-metallurgical bauxite can be presented as:

Chemical-grade bauxite for the production of aluminium chemicals;
Refractory-grade bauxite to produce high alumina refractories; and
Abrasive-grade bauxite for the production of abrasives.
Calcined Bauxite

Calcined bauxite (following iron reduction) is produced by calcining (heating) high alumina containing bauxite (55% to 60% Al2O3) at at temperatures ranging from 900°C to 1200°C for 50 to 60 minutes.

Calcination removes the inert moisture and increases the alumina content by converting tri-hydrate and mono-hydrate (gibbsite and boehmite) into anhydrous aluminium oxide by expulsion of water of crystallisation – similar to a laboratory “Loss of Ignition” (LOI) test.


Uses

Calcined bauxite is used for different applications that include:

Refractory bricks
Grinding media (Abrasives)
Road surfacing material
Proppants
Alumina cement
Ceramics
Refractory grade calcined bauxite is produced mainly in China, India, Guyana and the USA.

The raw bauxite used for calcination should contain alumina up to 55 to 60%. Availability of this quality bauxite is limited.
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Demand for non-metallurgical Bauxite has continued to increase and a set of applications have been developed. These include refractories, abrasives (including the recently development proppants), high aluminium cements, aluminium chemicals, activated bauxite and alumina.Other uses include filters and pigments for plastics and elastomers; special calcined aluminas for ceramics, refractories, abrasives, soft burned calcined aluminas, hard burned calcined aluminas to produce alumina cements and calcium-aluminate cements.Non-metallurgical bauxite can be presented as:Chemical-grade bauxite for the production of aluminium chemicals;Refractory-grade bauxite to produce high alumina refractories; andAbrasive-grade bauxite for the production of abrasives.Calcined BauxiteCalcined bauxite (following iron reduction) is produced by calcining (heating) high alumina containing bauxite (55% to 60% Al2O3) at at temperatures ranging from 900°C to 1200°C for 50 to 60 minutes.Calcination removes the inert moisture and increases the alumina content by converting tri-hydrate and mono-hydrate (gibbsite and boehmite) into anhydrous aluminium oxide by expulsion of water of crystallisation – similar to a laboratory “Loss of Ignition” (LOI) test. UsesCalcined bauxite is used for different applications that include:Refractory bricksGrinding media (Abrasives)Road surfacing materialProppantsAlumina cementCeramicsRefractory grade calcined bauxite is produced mainly in China, India, Guyana and the USA.The raw bauxite used for calcination should contain alumina up to 55 to 60%. Availability of this quality bauxite is limited.
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Permintaan untuk non-metalurgi Bauksit terus meningkat dan satu set aplikasi telah dikembangkan. Ini termasuk refraktori, abrasive (termasuk proppants pembangunan baru-baru ini), semen aluminium tinggi, bahan kimia aluminium, bauksit dan alumina aktif. Kegunaan lain termasuk filter dan pigmen untuk plastik dan elastomer; alumina dikalsinasi khusus untuk keramik, refraktori, abrasive, lembut dibakar alumina dikalsinasi, sulit dibakar alumina dikalsinasi untuk menghasilkan semen alumina dan semen kalsium aluminat-. bauksit Non-metalurgi dapat disajikan sebagai: Kimia kelas bauksit untuk produksi bahan kimia aluminium; Refractory bauksit -grade untuk menghasilkan refraktori alumina tinggi; dan Abrasive kelas bauksit untuk produksi abrasive. dikalsinasi Bauksit dikalsinasi bauksit (setelah pengurangan besi) diproduksi oleh kalsinasi (pemanasan) alumina tinggi yang mengandung bauksit (55% sampai 60% Al2O3) pada pada suhu berkisar antara 900 ° C sampai 1200 ° . C selama 50 sampai 60 menit Kalsinasi menghilangkan kelembaban inert dan meningkatkan konten alumina dengan mengkonversi tri-hidrat dan mono-hidrat (gibsit dan boehmite) menjadi aluminium oksida anhidrat dengan pengusiran air kristalisasi - mirip dengan laboratorium "Kehilangan Ignition . "(LOI) uji Menggunakan bauksit dikalsinasi digunakan untuk aplikasi yang berbeda yang meliputi: batu bata tahan api Grinding media (Abrasives) bahan Jalan permukaan proppants semen Alumina Keramik . kelas tahan api dikalsinasi bauksit diproduksi terutama di China, India, Guyana dan Amerika Serikat baku bauksit digunakan untuk kalsinasi harus berisi alumina hingga 55 sampai 60%. Ketersediaan kualitas bauksit ini dibatasi.



























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