Recent Maerz Ofenbau projects in Laos, Thailand, India and China
MCS Mining Industry Laos Co., Ltd., domiciled in Pin Village, Thekhek District, Kham Muan Province/Laos placed an order with Maerz Ofenbau AG for the supply of engineering, license, know-how, equipment as well as technical assistance services during commissioning and start-up of a Maerz PFR lime shaft kiln. The new kiln of the rectangular type E5 will calcine limestone with gradings of 40 to 80 mm and 50 to 100 mm resp. and will produce more than 300 t of lime per day. Coal dust will be used as fuel, with an option to also use petcoke dust. Maerz’s equipment supply comprises the following main items:
Process air blowers with motors
Electric, measuring and control system
Firing system for coal dust, including the start-up burner system
Hydraulic equipment
Limestone skip hoist winch, including the electrical measuring and control equipment
The contract signed by the client and Maerz also contains an option for the construction of another identical Maerz PFR lime kiln.
Chememan Public Company Ltd., Thailand, operating several Maerz PFR and HPS Kilns for a number of years, and Maerz Ofenbau AG signed a contract for the construction of another Maerz HPS (High Performance Single Shaft) kiln to be erected in Saraburi/Thailand. The new single shaft kiln of the H4-1D type will process limestone with a grading of 20 to 45 mm to produce more than 200 t of burnt lime per day, using coal dust as fuel. The kiln is suitable to operate at approx. 60 % of its nominal capacity without a noticeable drop in lime quality.
According to the terms of the contract, Chememan will partly re-use Maerz engineering from HPS kiln No. 1. Maerz will provide know-how and license and will supply additional and updated engineering, material and equipment, as well as technical advice and assistance services during hot commissioning and the acceptance test run on the new lime kiln plant. Maerz’s scope of material supply includes the following main items:
Steel structure for the kiln shaft
Limestone charging and weighing system, including the skip winch
Process air blowers with electric motors
Coal firing system, including side burner equipment
Hydraulic system
Electric, measuring and control equipment for the lime kiln
Lime discharge device
Refractory materials (optional)
Erection of the plant will be performed with local contractors. Commissioning of the kiln plant and start of commercial quality lime production is scheduled for 8 to 10 months from the effective date of the contract.
Siriman Chemicals India Private Limited, domiciled in Hyderabad, TG, India, placed an order with Maerz Ofenbau AG for the construction of a Maerz PFR lime shaft kiln to be installed at Visakhapatnam, Andhra Pradesh.
The new kiln of the rectangular type E2 will process limestone with gradings between 30 and 90 mm to produce 150 t of burnt lime per day. Hard coal dust will be used as fuel. Maerz will supply key equipment for the lime kiln, such as:
Coal dust firing system
Electric, measuring and control system
Hydraulic equipment
Limestone skip hoist winch, including the pertinent electrical measuring and control equipment
Siriman will perform the erection of the plant with local contractors and Maerz will act as technical advisor. The contract signed by the client and Maerz also contains an option for the construction of another identical Maerz PFR lime kiln.
Tangshan Gangyuan Metallurgical and Furnace Co., Ltd., Laoting Branch, with its legal address in Hebei Laoting Economic Development Zone, as the “Buyer”, placed an order with thyssenkrupp Industrial Solutions (China) Co., Ltd, domiciled in Shanghai, as the “Seller”, for five Maerz PFR lime kilns to be installed in Laoting/ Hebei Province.
The new lime kilns of the type R5S, each with a daily capacity of 800 t of burnt lime, will be the biggest PFR Kilns built to date by Maerz Ofenbau AG, resulting in a total production of 4000 t of lime per day. The kilns will be lean gas fired with the option to install an additional coal firing system in the future.
Within the scope of the contract, Maerz – in cooperation with thyssenkrupp Industrial Solutions (China) Co., Ltd., Shanghai, – will supply engineering, license, know-how as well as technical assistance services for erection, commissioning and start-up of the new lime kiln plant together with on-site training of the end-user’s operating personnel. Furthermore, the buyer has ordered the following key equipment for the lime kilns:
Process air blowers
Variable speed motors
Lean gas heating equipment
Option for coal heating system (future)
Hydraulic system
Electric, measuring and control equipment
Limestone skip winch with pertinent electric, measuring and control system
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