Lime Archives - Stm-technologies

BK Shaft Kiln Last generation

The BK kiln is equipped with external combustion chambers at two levels. A internal cylinder creates an annular zone through which the material passes.

The combustion gas is recirculated in the empty central cylinder and by controlling its temperature it is possible to produce different qualities of lime.

Fully automatic operation fine control of combustion system, have improved the quality of the performance of the kiln.

Technical Data

CAPACITY FROM: 300 tpd to 800 tpd

MATERIAL: Limestone and Dolomitic limestone

LIMESTONE SIZE: from 30 mm to 120 mm with ratio min/max size 1:2

FUELS: Any type of fuel can be used

FUEL CONSUMPTION: < 950 kcal/kg of lime

ELECTRIC POWER CONSUMPTION: < 35 kWh/Ton of lime

LIME QUALITY: Soft burnt lime (T60 < 3 minutes) to Hard burnt lime (T60 > 6 minutes)

RESIDUAL CO2 IN THE LIME: < 1%

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CO₂

CO₂ can be recovered for PCC plant or other process plant.

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STM’s laboratory uses modern equipment to analyze and testing raw materials and finished products in order to determine the equipment and plant specifications and define the applicable performance parameters for the contract.

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Dispatching by truck / big bags

Each storage silo is equipped with a vibrating bottom, telescopic device for bulk loading on closed trucks and dosing system for feeding bulk big bags.

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PCC – Precipitated Calcium Carbonate Plants

Technical Data

CAPACITY: Tailor made plants

TYPICAL APPLICATION: Paper industry, Paint industry, Chemical Industry, Food Industry, Pharmaceutical Industry

PCC TYPES:

Scalenohedral PCC

Rhombohedral PCC

Nano PCC

PCC is utilized in several industrial processes, such as:

Cosmetics and toothpastes
Paper and painting industries
Antacid in medicine and veterinary
Basis of polish pastes
Neutralization of wine acidity
Medicine (as absorber, antirachitic etc.)
Additive for rubber, plastic, linoleum, paper and insulating materials.

STM is able to provide the engineering and to supply PCC tailor made plants of different capacities, from pilot plant size to industrial size, thanks to the high experience of STM PCC technologist either in the design and commissioning of PCC plants achieved working with the primary PCC world producers.

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Waste grinding

The waste B of the air separator is grinded through a roller mill in order to assure the desired fineness and transported to the storage silo B.

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Hydrated Lime classification Storage

The hydrated lime discharged by the hydrator is classified through an air separator.

The fine product A is transported via belt conveyors and bucket elevator to the storage silo A.

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HY Lime Plant

Hydrated lime has a variety of uses in industrial applications like water treatment, building, waste gas treatment soil stabilization, etc.
The hydration process consists in an exotherm reaction between lime and water.

The process is performed through a three-stage hydrator:

I Stage: Reaction chamber.

II Stage: Mixing chamber.

III Stage: Seasoning chamber.

Dosing of water and quicklime to the hydrator is accurately controlled by a screw conveyor and water pump at variable speed controlled by inverters.

The product discharged from the hydrator is classified in order to obtain the desired fineness.

Technical Data

CAPACITY FROM: 5 tph to 30 tph

MATERIAL: Lime & Dolomitic Lime

RESIDUAL MOISTURE: < 0,8%

FINENESS: 95% < 75 micron

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Milk of Lime

Milk of lime can be produced with different percentages of solids and can be adapted to the needs of the relevant process. The conditions during the production of lime milk influence its properties decisively so the production parameters must be carefully controlled.

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