In order to determine as a gold - arsenic sulphide concentrate feed - preparation stage cyanidation step chlorination roasting process results, and study the phase transition sequence of the structural transformation of arsenic pyrite produced during the heat treatment, and with a noble metal sulphide The physico - chemical properties of the calcined product . Comparison (FIG. 1) of gaseous chlorine kinetic curves generated with silver salt quantitative method, oxidation of sulfide sulfur in an amount determined by iodine titration, arsenopyrite oxidation - chlorination roasting process and in a single - The initial temperature of the reaction in the oxidative roasting process is completely the same, and the FeAsS decomposition temperature zone is completely consistent in the above two cases, etc., and it can be confirmed that the decomposition of the solid chlorine agent in the chlorination roasting is not the result of the solid phase reaction. It is due to its interaction with sulfur dioxide generated during the oxidation of sulfides:    2NaCl+SO 2 +O 2 =Na 3 S0 4 +Cl 2 Decomposition of sulfur present in the original gaseous active agent can be chlorine dense reinforcing structure: iron arsenopyrite only requires oxygen in air to oxidize, and the need for effective chlorination to progress - further exploded chloride And the formation of porous oxides. Therefore, the degree of oxidation of sulfide in the oxidative chlorination roasting process is more sufficient than in the case of single - oxidation roasting. use" The diffraction pattern analysis shows that the φ 1 phase exists only in the crystallites with magnetite ( Fe 3 O 4 ). The arsenate may be a composite salt of magnetite and non-volatile arsenic pentoxide of the above composition, Fe 3 O 4 · As 2 O 5 or Fe 3 O 4 . This compound is the most stable of all iron arsenates in chlorine media. It can only be converted from magnetite to hematite after decomposition. The phase transition of arsenic pyrite during chlorination - reduction calcination is similar to that of oxidative - chlorination roasting. In this case, the carbon reduction added to the charge will cause the magnetite phase to exist for a longer period of time (in
Aluminum Alloy Extrusion Tube
1.Specification: Various size as
customer's requirements
OD
OD Tolerance
ID Tolerance
Roundness
straightness
Circular run-out
φ16-20
±0.02
±0.02
0.01↓
0.015↓
0.05↓
φ20-30
±0.02
±0.02
0.01↓
0.015↓
0.05↓
φ30-50
±0.05
±0.05
0.02↓
0.020↓
0.08↓
φ50-80
±0.15
±0.10
0.05↓
0.025↓
0.10↓
7. OPTIONAL PACKING: Polyfoam interleave inside, wooden
case
Trade Terms Aluminum Alloy Extrusion Tube,Aluminum Extrusion Tube,Aluminium Extrusion Tube,Aluminium Alloy Extrusion Tube Changzhou YiFei Machinery Co., Ltd. , https://www.yifeialu.com
2.Material:A6063,A6061,A3003 and other series alu
alloy
3.Suface treatment: anodizing ,polishing,turning ,power coating,mill finish etc
4.Design:OEM,ODM,or design by ourselves
5.Equipment: CNC ,extruding machine,cold drawn machine,heating
oven,straigtening machine,cutting machine
6. STANDARD PACKING :Wooden case/carton
1. Payment: 30% T/T in advance, 70% balance pay before delivery. L/C at
sight.
2. Delivery time: 20 days after deposit receiverd. If opening mould, plus
7-10 days.
3. Trade Term can be chosen depending on your requirements.
4. FOB Port: Shanghai