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The Most Frequently Asked HZZK Questions

Why is the HZZK needed now?

Increasing urbanization, booming construction industries and the escalating use of bricks combined with the continued use of outdated, polluting brick kilns has resulted in serious environmental, health and social impacts.

The existing technologies operate in poorly regulated brick industries and require urgent replacement.

HZZK is an ideal replacement technology for approximately 500, 000 outdated existing kilns. It can mitigate the high black carbon and CO2 emissions of the brick industry.

As the original, authentic zig-zag technology the HZZK can meet the challenge of providing a socially responsible, environmentally sensitive and economic replacement kiln technology.

What are the environmental emissions of the global brick industry?

  • High CO2 emissions
  • Brick kilns are high emitters of CO2 and Short Lived Climate Pollutants (SLCP’S) particularly contaminating black carbon or soot which is made up of particulate pollution PM10 and PM5 and noxious gases.
  • Kilns emit approximately 1,072 million tonnes of CO2 annually which is 2.7% of total global emissions.
  • Converting as little as 10% of the kilns to Habla Zig-Zag would reduce emissions of CO2 to the atmosphere by a minimum of 50 million tonnes.
  • By comparison, the global airline industry is estimated to release a total of approximately 815 million tonnes of CO2 **
  • Replacing all brick kilns in developing countries with energy efficient Habla Zig-Zag Technology can remove approximately 550 million tonnes of CO2from the atmosphere annually.High Black Carbon emissions

**IATA Fact Sheet: “ Climate Change & CORSIA “ December 201

What are the current options for brick kilns?

  • Hoffman Kiln invented 1858 in Germany.
  • Metal Chimney Bull’s Trench Kiln (MCBTK) widely banned, highly polluting, invented in India 1876.
  • Fixed Chimney Bull’s Trench Kiln (FCBTK) is a Bull’s Trench Kiln, with a ‘Hoffman’ style fixed brick chimney, extending approximately 30 metres above the Kiln. Regulators recommend replacement with zig-zag technology, due to kiln inefficiencies.
  • Tunnel Kiln invented in 1877 in Germany. Currently used in developed countries, now highly automated process, requires guaranteed power supply. Very high capital cost and requires highly skilled labour. Bricks can be made ‘untouched by human hands’
  • Habla Zig-Zag Kiln invented 1927 in Germany by Alois Habla. It is the original, authentic archless zig-zag kiln.
  • Vertical Shaft Brick Kiln (VSBK) introduced into Asia early 1970’s. Has a limited capacity for production output & is very ‘clay specific’.

Why use Habla Zig-Zag kiln technology?

  • All archless zig-zags are based on the original Habla Zig-Zag Kiln Technology invented by Alois Habla. Consistent, international review and research now recommends zig-zag technology. To date, operational ‘zig-zags’ do not include the unique HZZK components and operational features that enable superior fuel efficiency, minimal emissions and quality brick production.
  • The proven HZZK is an ideal replacement for inefficient brick kilns, it works successfully and efficiently. Although it is a non-mechanized, low complexity technology, it can also incorporate increased mechanisation.
  • The existing labour force can be used to operate kiln , increase skills and remain part of the kiln workforce .Working & living conditions for kiln workers and surrounding population are significantly improved
  • The HZZK has low construction costs, economical to replace old kilns, short payback period. It offers better outcomes – lower fuel usage means decreased emissions (emissions results are to the tunnel kiln). It produces a uniform, saleable product with even cure and even shrinkage.

Are there any Habla Zig-Zag Kilns in operation?

In 2016, Australian‐owned Habla Zig-Zag Kilns International Pty Ltd (HZZKI) re- established operations and successfully constructed and commissioned a pilot kiln as an energy efficient clay brick- firing technology transfer project in South Africa. The kiln, with enhancements, incorporated the original design features of Alois Habla, the inventor of archless zig-zag technology.

Prior to 1940, 150 Habla Zig-Zag Kilns were successfully constructed and operated as productive and non-polluting, continuous commercial kilns. These were in the USA, Germany, England, and Europe. Further kilns were later built in England and Australia. These HZZK’s were replaced by automated, expensive, tunnel kilns post war, when labour shortages and manufacturing costs increased.

Currently, zig-zag kilns are partially” fashioned” from the original Habla Zig-Zag design. These versions of the original Habla Zig-Zag do not contain the unique design features and components.

Why will HZZK succeed?

  • The design specifications produce a totally consistent kiln which can be replicated at any chosen site, rural or city.
  • It has been proven to work in fully commercial settings.
  • It uses an existing workforce under greatly improved working & living conditions.
  • Air quality and health are improved locally and in the region.
  • Proven to reduce emissions.
  • Low cost to construct & operate.
  • Highly fuel efficient.
  • Non-reliant on electricity, suits developing countries where power sources are often unreliable and/or unavailable.
  • Offers better outcomes – lower cost, lower emissions, improved working & health conditions, significant fuel savings, better quality product.
  • It is not a highly complex technology, suitable for developing countries.
  • Produces a consistent, quality, saleable bricks.
  • On existing sites brick kiln owners and labour will not lose income. It can be built quickly and operational within a brick season.

Can the Habla Zig-Zag Kiln be built to suit any size or scale?

Yes, the HZZK can be easily adapted to suit village, city or industrial applications (small or large scale production). The HZZK can operate in a continuous or semi continuous mode, depending on output requirements.

What about the cost and construction of the Habla Zig-Zag Kiln?

Size, location and building materials are key factors influencing the cost of each kiln.

HZZK has a rapid pay-back period. The Habla Zig-Zag kiln with its high fuel savings, energy efficiency, minimal emissions, good quality bricks and health benefits is cost competitive, when compared to other kilns of similar output and size.

Construction will be overseen by Habla Zig-Zag Kiln International in conjunction with in-country engineers.