Environmental Engineering Reference
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(a)
(b)
Figure 3. (a) Jarosite waste of Debari Zinc Smelter, HZL, Rajasthan, India;
(b) CCRs disposal pond, STPS, India.
2.3. Experimental Approach: Process and Product Development
For the initial experiments, jarosite waste and clay were mixed together in
different ratios along with CCRs. Details are shown in Table 1. Then the
required quantity of water was added until it reached workable state. This
composite matrix was kneaded well and was placed in rectangular cast iron
mould and pressed in a hand press. The mould dimension was 7.5 cm x 3.5 cm
x 3.5 cm. The casted solidified products were then removed from the moulds
and allowed to air dry. Further thermal stability and strength of solidified
composites were achieved through low temperature sintering (960 °C) in a
muffle furnace for 90 minutes at the heating rate of 6° C per minute thereafter
removed from the furnace and kept for cooling in room temperature (30±5°C).
Thereafter, the mechanical properties and toxicity leachate characteristics of
the s/s sintered jarosite waste composites were tested to assess their potential
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