NRDC Technology offer-HYDRATED LIME

PLANT PARAMETERS
Capacity, TPA	900
TPD	3
No.of Shifts / day	1
Working days / Yr	300
Land Area, m²	300
Covered Area, m²	275
MANPOWER
Managerial	1
Skilled	3
Unskilled	10
RAW MATERIAL (Tonne per Tonne of Product)
Calcined Lime	0.8
UTILITIES (Per Tonne of Product)
Power, KwH	120
Process Water, KL	1.5
Raw water, KL	1.1
PLANT & MACHINERY
Belt conveyor	Hopper
Jaw crusher	Hydration unit
Bucket elevator	Vibratory system
Heat exchanger	Dust collector

Lime, an excellent time-tested building material along with its versatile other applications, suffers from the disadvantage of easy perishability by the atmospheric moisture and carbon dioxide (CO₂). The best method for retaining the useful properties of lime is to hydrate it before storing. In addition to its major application as building materials, hydrated lime is also used in petro-chemical & pharmaceutical industries, in the manufacture of grease, paint, etc. The major applications of hydrated lime are summarised below :-

Building material
Metallurgical processes
Chemicals
Pharmaceuticals
Sanitation
Paper and pulp
Food processing
Dairying
Leather processing
Petroleum refining
Rubber and Paint
Soil stabilisation etc.

The hydrated lime is manufactured in different grades depending on the quality of lime-stone and requirement of different end users .The manufacture of hydrated lime offers a good prospect to small scale manufacturers for converting local resource into a very useful product. The manufacturing unit can be located in any place near to the lime stone deposits.

PROCESS

Dry hydrated lime is obtained by hydrating unslaked lime (obtained by calcining lime stone) with hot water at an elevated temperature and at atmospheric pressure. In order to control the hydration process lime hydration machines are specially designed and fabricated which produces stable dry powdered hydrates of lime. The process of hydration takes place into the hydration machine in the following stages :

Hydrator
Homogenizer
Cooler

The lime hydrator comprises of three horizontal chambers arranged one and the other. The capacity of the chambers adopts to the increase in volume of hydrate during the slaking process i.e. conversion of quick lime into hydrated lime starts.

The main part of the slaking process then takes place in the 2nd chamber `HOMOGENIZER' the main slaking chamber wherein preheated water is injected through jets in a controlled manner. The substance enter into a dust collector, and return to the HYDRATOR.

The hydrates is then sent to the vibrating screens, placed over storage bins, by means of conveyor and bucket elevator.

National Research Development Corporation, a Government of India Enterprise, is a premier technology transfer Corporation with four decades of experience. It has helped establish over one thousand projects in the small and medium scale sector.

The supply of technologies and services to entrepreneurs extend both in the developing and developed countries like USA, Germany, Malaysia, Burma, Nepal, Senegal, Madagascar, Indonesia Philippines, Vietnam, Lanka, Kenya, Brazil, Bangladesh and Egypt.