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  1. groags

    Protection of Titanium Vessels

    Hi, I will ask the Chemical Engineers the same question I asked the Materials Engineers and hopefully someone might have some knowledge. I have a Grade 17 Titanium Autoclave that needs to be temporarily decommissioned for 3 months. It is currently in service for a high pressure sulphuric acid...
  2. groags

    Passivation/Pickling of Titanium

    Hi, I am looking at ways of temporarily decommissioning (for 3 months) a Titanium Grade 17 autoclave. The autoclave is in service for Pressure Acid leaching of Nickel laterite ore. The conditions are 45 g/L sulphuric acid at 250 degrees C with 70 g/L chlorides. Does the titanium need to be...
  3. groags

    Pump Selection for Viscous Service

    baj2 We have a similiar application, but a slurry not an oil. The flowrates are similiar and the apparent viscosity is up to 100 Pa/s, extremely viscous!! You don't have to change pumps, you can use an existing centrifual pump but with a very new type of impeller. We use a centrifugal pump...
  4. groags

    Corrosion rates of Carbon Steel in Sulphuric/Chloride environment ?

    Hi, does anybody know where I can get an idea of corrosion rates of Carbon Steel ? Specifically in a high temp, chloride sulphuric acid environment? A special lining on a tank has failed due to large particle erosion. The steel shell is suspected to be exposed and I would like to be able to get...
  5. groags

    Pressure Autoclave Vent Gas Flowrate Calculation

    Hi, I am trying to determine the expected vent gas flowrates for a Nickel Laterite pressure leaching autoclave. The current pressure control valve is inoperable, as it is too large and vents too much gas when open, making pressure control difficult. I have determined that N2 is negligible in...
  6. groags

    How do I prevent CaSO4 Anhydrite Scale in a CaCl2 vaporization loop?

    We in conjunction with a Chemical company have developed a phosphonate based antiscalent for Anhydrite/Gyspum scale in supersaturated sulphate environment. It works extremely well and we have not had any Ca scale issues since. I would reccommend an antiscalent of this type for your HX's and...

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