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Flue gas purification in magnesium hydroxide calcination

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Refractories Aims and scope

Conclusions

When magnesium hydroxide from seawater is calcined in an oil-fired rotary kiln, a solid deposit forms rapidly on the inside surfaces of the flue and the gas scrubber components.

The deposit is caused by the sulfur and chlorine compounds in unroasted magnesium hydroxide and by the sulfur, vanadium, and alkaline metals in the fuel oil and its ash. The effect from the compounds in the raw material in this respect is about three times greater than that of the relevant compounds in the fuel oil. A change-over to a sulfur-free fuel, e.g., natural gas, does not eliminate deposit formation entirely.

An effective method of controlling deposit formation consists of treating the fuel oil with VNIINP-106 additive. A proportion of 1% of this additive in the fuel oil prevents the formation of a deposit on the electrodes of electric filters.

The proportion of additive to be used depends mainly on the quality of the raw material and can be reduced by improving the production technology of magnesium hydroxide with a view to reducing the proportion of compounds promoting deposit formation.

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Literature cited

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Authors and Affiliations

  1. All-Union Scientific-Research and Planning Institute for Gas Purification in Ferrous Metallurgy, USSR

    O. P. Ostrovskii, Yu. N. Reznikov, Yu. I. Tseluiko & Yu. I. Chander

Authors
  1. O. P. Ostrovskii
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  2. Yu. N. Reznikov
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  3. Yu. I. Tseluiko
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  4. Yu. I. Chander
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Additional information

Translated from Ogneupory, No. 5, pp. 21–26, May, 1974.

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Ostrovskii, O.P., Reznikov, Y.N., Tseluiko, Y.I. et al. Flue gas purification in magnesium hydroxide calcination. Refractories 15, 291–295 (1974). https://doi.org/10.1007/BF01284151

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  • DOI: https://doi.org/10.1007/BF01284151

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