The main contrasts between how hydrated lime manufacturers in India create hydrated lime and quicklime with their reactivity & their chemical structure. Both are calcium compounds. In the hydration state, calcium is called calcium hydroxide, and in its true state, it is called calcium oxide, or also called quicklime.
Calcium oxide has a thick density (65lb/ft³) and is more sensitive than hydrated lime. To explain, hydrated lime results from adding water to powdered quicklime, placing it in a kiln or oven, and then pulverizing it with water. The resulting lime has a thickness of about 35lb/ft³, and is called calcium hydroxide.
Calcium oxide (quicklime) must be slaked in a controlled environment because it can produce heat that reaches up to 120 degrees Fahrenheit. Calcium hydroxide, or hydrated lime, is neutralized already, so it will not go through oxidation and can be processed with water in our system, for water pH control, lime slurry addition, lime slurry mixes, soil restoration and more.
If dry, the method feed rate influences what to choose between using hydrated or quicklime. Note that quicklime is highly more “reactive” than hydrated lime. Nevertheless, in some processes, hydrated lime is not fitting even if we inject it dry, and vice versa with quicklime. The best example is flue gas treatment, also known as Flue Gas desulfurization, used in cement industries, coal fire plants, glass industries, and incinerators to reduce their HCl, Sox and Nox effusions. Some of these systems need hydrated lime to filter or catalyze the particles released after combustion, while other systems use quicklime. The principles are the same, and the feed rates will be similar. Though, the process and chemistry of the flue gas dictate when to use quicklime or hydrated lime.
If the regularity requires a lime slurry, the primary method to determine if hydrated lime would be more suitable than quicklime is to know the amount of process required. In systems that require a large amount of lime, quicklime would be the go-to material as the density is twice the density of hydrated lime, which decreases the storage and transportation costs. Though, quicklime’s hydrophobic effect with water requires a lime slaker to be applied in the process. The quick lime is generally received in pebbles of about one quarter to one-eighth of an inch, or in powder sort(<300µ). The slaking of the pebble lime and powdered quicklime has to be engineered regarding their exothermic reactions. The lime slaker blends quicklime with water to create calcium hydroxide in a solution which is called lime slurry. Slakers are good for a large volume of consumption, or high demand, of calcium. However, when a smaller or medium lime solution is demanded, hydrated lime is more efficient because the material required to use the hydrated lime is simpler and does not need to handle an exothermic reaction. Here, the powder is fed with screw conveyors directly into the slurry tank provided with a slurry mixer, and water is added to match the demanded lime slurry concentration.
Discharging and healing system operating on sediment lime silos.
The amount of lime you need will determine what storage capacity is necessary. The main vessels used are silos, hoppers, and enormous bags. Discharging mechanisms include sediment mechanical box activators, air injection systems or simple vibrators pads. The lime can be supplied and conveyed by various means, including rotary airlocks, screw feeders, conveyor belts, drag chain conveyors or pneumatic conveyors. If the lime has to be placed into the lime slurry, a lime slurry tank can be demanded and equipped with a slurry agitator and a water quantity control valve.
To transport the lime slurry solution, you can use pumps. Krishna Mines hydrated lime manufacturers use peristaltic pumps or continuous cavity pumps, or any type of lime slurry pumps our customer feels certain using.
The pumps needed with quicklime are precisely the same as with a hydrated lime solution. Though, if the lime is injected into a solvent, we will also require a lime slaker. The lime slaker is usually provided with a mixer and agitator, all made of stainless steel, besides a vacuum system (lime scrubber) that reaches down and evacuates the heat and steam created from the feedback between the calcium oxide and water. Besides that, quicklime goes exactly the same as hydrated lime comprising storage, metering, and conveying.
If this is for water processing, Krishna Mines hydrated lime manufacturers suggest the use of hydrated lime because the supplies rate is low. Based on the budget, the lime could be preserved within silos, hoppers, or even gigantic bags or super sacks. Using volumetric screw conveyors to feed and convey is likely the most reliable & most cost-effective clarification of lime feeders, while in use with a lime silo.