Mini Cement Plant/Small Cement Production Line with Rotary Kiln From China Factory

Mini Cement Plant/Small Cement Production Line With Rotary Kiln

Cement production process:
1. Breaking and pre-homogenization
(1) Breaking -- In cement production process, most of the raw materials demand to be broken, such as limestone, clay, iron ore and coal. Limestone is the largest amount raw materials for cement production. After mining, its particle size is larger and its hardness is stronger,so crushing limestone plays a important role in the materials crushing of cement plant.
(2) Raw materials pre-homogenization -- pre-equalization technology is the stacker-reclaimer technology by using technology in the process of depositing and withdrawing raw materials to achieve raw materials' initial homogenization, which can make materials stockyard have two functions: storage and homogenization.

2.Raw material preparation
In cement production process, producing tons of portland cement should grind at least three tons of material (including a variety of raw materials, fuel, clinker, mixed materials, gypsum). It is a great significance for ensuring product quality and redusing energy consumption by the means of reasonable choice for grinding equipment and process, optimization of process parameters, correct operation and controling operation system.

3. Raw meal homogenizing
In dry cement production process, stabilizing raw materials into the kiln is the premise for stabling clinker burning thermal system, Raw meal homogenizing system plays the final control role for stabling raw material into the kiln.

4. Pre-heat and decomposition

(1) Material dispersing
80% of heat exchange happen in the inlet pipe. The raw materials will be fed into the preheater moving up with gas and is dispersed at the same time in the impact of high-speed updraft gas.
(2) Gas-solid separation
When gas with material powder enters into the cyclone, it will be forced to rotation flow in the annular space between the body of the cyclone and the inner of the cylinder(exhaust pipe), spin at same time move downward, which can move from the cylinder to cone, and extend to the end of the cone, and then rotate up to discharge from the exhausting pipe.
(3) Pre-decomposition
The emergence of the pre-decomposition technique is a technological leap to cement calcining process. To add decomposing furnace between preheater and rotary kiln, use the rise fule in the end of the kiln and set fuel injection device can make the exothermic process of fuel burning and endothermic process of carbonate decomposition of raw material proceed quickly in the suspended state or fluidized state in the decomposingfurnace, which can increase resolution ratio of raw matarial to above 90%.
(4) Sintering of cement clinker
Raw materials complete pre-heating and precalciner in the cyclone preheater. The next process is that entering into rotary kiln to the sintering of clinker. In the rotary kiln, carbonate decompose rapidly and take place a series of solid-phase reaction to produce the mineral in the cement clinker. 

5. Cement grinding
Cement grinding is not only the last process in the cement manufacturing process but also the most power consumption process. Its main function is to grind cement clinker(gelling agent, performance tuning materials) to appropriate particle size(fineness, superficial area), form a certain particle size distribution, increase the hydration area and accelerate the hydration rate to meet the requirements of cement slurry condensation and sclerosis.

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