Coal briquetting process is a technology that can be used to improve energy levels of low quality coals and become a very viable option for the coal mining industry to be sustainable and environmentally friendly as it can be using coal.

Currently depending on the quality of the coal 20 to 40% in some cases of the coal produced is thrown away and used as land fill. This is not good for the environment and also you need the storage space. Within this reject we find that there is recoverable coal and maybe 10 to 20% of that is reusable therefore reducing waste by making briquettes. Also the washing plants depending on their design can't wash lower then 6 mm in size and this in turn means that all coal 6 mm or less is thrown away. Why? There are methods we have employed in Australia for many years where the recovery is not down to 6 mm but as low as 1.5 mm therefore reducing waste once again. We have the contacts within our group that could assist in this area as well as briquetting.

Given below are the details of the technology and its advantages and disadvantages.

Briquetting with the use of binders

Advantages and disadvantages of briquettes

Methods used for the processes

Costs involved in obtaining the specifications for the processes

Implementation of the technology into India

Set up of the process plant

Briquetting with the use of binders



Briquetting has been around since 1848 and is a process where fine coal particles are first dried, crushed and screened then mixed with binders to form a product that is durable and can be used in many areas such as steel making, powering of power stations and also in the use in home cooking, stoves and furnaces.

There are many types of binders available in the market and this is where the advantages are also where there are waste products abundantly available in India can be utilised. Each one will only suit a specific coal type and we can match the correct binder to give the best results to ensure clean burning, reduction of smoke, reduction of sulphur, but give the best energy possible from the sampled product

Quantities of binder product, type of binders used and formulas for the briquetting process can be obtained thorough the utilisation of our company. All reports come with a reporting system that entails all the details of the sampled product and the formulas used to best utilise the product for sale

The coal briquetting process uses binders or “glues” to reform low grade coal to a usable size and quality. These binders can be sourced locally throughout India to achieve the best cost effective way of producing the desirable briquette.

When coal is mined, cleaned and transported, considerable quantities of fine coal are generated. The fine coal is often unsuitable for the end process and typically retains large amounts of water (10 -30%). Consequently fine coal is often rejected by buyers. We find that anything less then 6 mm in some cases is rejected and thrown away filling land areas and also leaching into the water streams and rivers.

By capturing reject material of various sizes plus also the material less then 6 mm straight away will give us increase in energy and with further addition of binders this will further increase the energy levels of the briquette.

The process has very little inter-particle voidage and as a consequence have a density very close to that of the original coal.

Briquettes can be made as hard or as soft as you require depending on the number of times the briquette is handled, exposure to the environment and how they are stored. The harder they are the longer they will last during transport, but they will require longer burn lead time during the burning process of the power plants.


There are guarantees that we can work out the formulas for the sampled product, but what we can’t foresee are the costs involved in the set up of the plant until the samples have been analysed and tested. These samples we need would amount to about average weight of 500 kg to be transported to our facility where we would develop the processes and also advise on the technology and equipment required to obtain the best results from the sample.

Laboratory analysis would include determination of the following analysis as a minimum:

  • Total moisture
  • Proximate analysis
  • Ultimate analysis
  • Specific energy levels
  • Sulphur content
  • SO2 and NO2 emissions would also be carried out

NOTE: - Measured concentrations of emitted SO2 would be related back to coal sulphur content to calculate sulphur capture.

Please remember that this technology reduces Sulphur emissions if used in power stations or home cooking, recycles waste from washeries and coal mines and also gives out the greatest recovery possible of the coal produced. It is eco friendly and adds energy to poor quality coal.

Advantages and disadvantages of briquettes


Advantages

Disdvantages
  1. Able to convert washery waste product to be reprocessed and used for steel making, power generation and used in home and businesses for cooking and heating.
  2. Environmentally acceptable methods world wide of reducing SO2 emissions and smoke emissions.
  3. Product gives extra energy at lower cost per tonne.
  4. Able to bind coal fines into something that is manageable and stable enough to withstand long transport to appropriate markets
  5. Able to be bound and then processes used to capture the sulphur almost 100% within the briquette and therefore reducing the risk of environmental issues such as acid rain, reduction of smoke and smell.
  6. Reduces the risk of water table and river damage by capturing as much fines and reusing these fines to give the maximum energy output possible.
  1. Cost of development of formulas to match specific coal samples to produce the briquette.
  2. Cost of binders during production process
  3. Purchase of briquetting machines
  4. Set up of processing plant.
  5. Labour costs of producing the briquette
  6. Ongoing maintenance costs for the equipment

Methods used for the processes


Typical briquetting plant process

Methods used for the processes

We provide the following options by using our company for integrating briquetting processes.

  • Full technical report delivered with processing methods and formulas
  • Full technical back up and support
  • Training provided on site
  • Guarantee of supply (sample dependant)
  • Ability to hire briquetting equipment (Optional)
  • Sulphur capturing methods employed
  • Smoke and odour reduction methods employed in manufacturing
  • Reports prepared by reputable organisations

Costs involved in obtaining the specifications for the processes


Costs involved in obtaining the specifications for the processes

Costs involved to determine the processes and to find out the formula for the briquetting is dependant on a number of factors. These factors are broad, but an average cost of developing the correct formula for the briquetting process and the advice on equipment required and methods to be used is approximately $450,000 Australian

Implementation of the technology into India


Cost for implementation of the technology into India

To set up a complete briquetting plant in India, which includes analysis, processes, equipment supply, training, technology etc a rough estimate is between $11 to $14 Million US dollars. This is depending on the coal quality, how far away the plant is from the coal mine or washery and what the production targets are. The returns on investment is very quick (within 2 to 4 years) as the waste material is used as landfill and very little is being recycled so you obtain the product basically for nothing. The ongoing cost is the material you have to mix with the coal waste to make it eco friendly and energy efficient.

Set up of the process plant


Set up of the process plant

There are many long term advantages in using this process and we have the right technology to assist your company to achieve the best result in reducing emissions and waste product