Lime Kiln Production Process and Workshop Safety Hidden Troubles

The main component of limestone is calcium carbonate, and the lime component is mainly calcium oxide. The basic principle of firing lime is to decompose calcium carbonate in limestone into calcium oxide and carbon dioxide quicklime by means of high temperature. Environmental lime kiln should be established by every lime production enterprise. After establishing an environmental lime kiln, it is also necessary to pay attention to the safety of the production workshop.

The main component of limestone is calcium carbonate, and the limecomponent is mainly calcium oxide. The basic principle of firing lime is todecompose calcium carbonate in limestone into calcium oxide and carbon dioxidequicklime by means of high temperature. Environmental lime kiln should beestablished by every lime production enterprise. After establishing anenvironmental lime kiln, it is also necessary to pay attention to the safety ofthe production workshop. Here we come together to understand the limestoneproduction process and hidden dangers.

First, limestone calcination process

Limestone and fuel are loaded into a lime kiln (if the gaseousfuel is fed through pipes and burners) and decarbonized by preheating to 850°C.The calcination is completed at 1200°C, and after cooling, the kiln isunloaded. Its entire calcination process is performed in a sealed container. Differentkiln shapes have different ways of preheating, calcining, cooling, andunloading. However, there are several process principles that are the same: Thecalcination temperature is 850-1200 degrees, and the preheat temperature is100-850 degrees. Ash production temperature is below 100 degrees. The qualityof raw materials is high, the quality of lime is good, the calorific value ofthe fuel is high, and the quantity is low; the limestone particle size isproportional to the calcining time; the lime activity is inversely proportionalto the calcination time and the calcining temperature.

The modern new technology lime kiln is a more scientific calcinedlime process that has environmental protection, energy-saving features, andmechanization and automation. Because the process uses modern calcined thermaltechnology, it can make full use of cheap energy, in particular, can also usethe original pollution of the environment as a source of energy, turning wasteinto treasure. This will not only protect the environment but also producelime, which is not only of good quality but also of low cost. Its direct andindirect benefits, economic and social benefits are all very impressive.

Second, the safety hazards of lime kiln production workshop

1. Fire, explosion hazards

There are dangerous places for fire and explosion: main controlrooms, power distribution rooms, cable trenches, and gas leaks.

2. Equipment accident

Workshop equipment mainly includes fans, hoists, andheat-conducting oil cooling fans, which can cause accidents if they are handledimproperly.

3. Mechanical injury and human fall accident

Uncovered transmission equipment can easily cause mechanicalinjury accidents. Lifting operations and other high-altitude work areas as wellas ground wells, pits, and ditches are also likely to cause human fallaccidents.

4. Anti-gas leakage

The gas pipeline is equipped with an emergency relief valve, aflammable gas alarm device is installed at the valve group, and an emergencyquick shut-off valve is provided. Air source device, emergency stop device,main control room and electrical equipment are explosion-proof according to theexplosion-proof zone. The distribution room is equipped with axial fans orexhaust fans to meet the ventilation system requirements.

5. Prevent equipment accidents, mechanical injuries and human fall

All drive equipment transmission parts are provided withprotective covers; vibrating screens, feeders are equipped with sealing covers,and interlocking devices are provided to prevent accidents caused bymisoperation; belt conveyors have pull rope switches and on-site alarms; shaftkiln maintenance and in the high-altitude operation platform, ladders,trenches, holes set protective railings, the workshop dangerous areas such asgas area set isolation railings, and warning signs and safety signs, safetyrailing design implementation of safety norms.