In a Portland cement factory, the cement production has the following several key stages:

The preparation of crude material

The limestone is main raw material of cement production, most factories near the stone limestone quarry, to reduce transportation cost as far as possible.

Through the demolition or the use flight loader carry on the raw material (limestone, shale, silicious clay and yellow iron ore) extraction.

The raw material was delivered to the breaker, stave or the hammer turns into the fragment there process.

Other limestones and raw material usual cover storage of squash, to guard by the influence of outside link boundary, also may the greatest degree reduce the dust.

In most situations, or the independent power equipment that the quarry and cement plant meeting needs to separate.

The crude material rubs

Rubs the workshop in the crude material, the raw material is rubbed thin, to guarantee high-grade mix.

Used in this stage has stood rubs with the ball grinding, former using pressure of drum leak through the material ground, the latter, then the dependence steel ball carried on the attrition to the material.

Until now, the crude material rubs to consume electrical energy the majority not to be used stave

Material, but transforms the heat energy loss. Therefore here has one kind the demand that melts after Jinan, hopes that can rub the workshop to adjust to the crude material, maintains the energy loss at as far as possible the low level.

Uses one kind of optimized powder to rub process the electrical automated system is very necessary.

The crude material was transported finally to equalization dump site carries on the preserve and further material mix.

Chamotte production

The diameter that the chamotte sphere agglomerates must in the 0.32-5.0cm scope, they produce in the chemical reaction between raw materials.

High-temperature treatment system including three steps: Drying or preheating, calcine (a heat treatment, produces quicklime in its process) as well as the roasting (agglutination).

The calcine is the hard core in this working procedure. The crude material continuously weighing and sent in the pre-heater most crown's cyclone separator, the material risen hot air heating in pre-heater, in the huge rotary calciner, the raw material transforms into the chamotte under 1450 Celsius.

The chamotte enters the fire grate cold machine to carry on the fuel cooling and cooling from kiln. Cooled the ripe material transmits the chamotte bunker to carry on the storage with the disc conveyer belt afterward.

After chamotte cooling, may take the transmission in the transportation, and may regenerate reaches 30% quantity of heat. Delivers is inducted the revolving furnace after the chamotte cooling air, it helps the fuel burning. Generally type fire grate Leng Jiwei the reciprocation stove plate-type and planet and turn on lathe the transferring type. Very rough dust that fire grate Leng Ji collects by the cement mineral constituent, it was recycled the recovery processing.

According to cooling temperature that the evaporation efficiency and hope obtain, in the undercooling causes with the air volume approximately is 1-2 kilograms/each kilogram chamotte. If after the undercooling, part of gas were used in other processes, for example the coal is dry, then may reduce the gas quantity that needs to purify.

The chamotte storage power may consider based on the market that a factory usually may store to save the chamotte annual output 5-25%. Conveyer belt and bucket elevator and so on supposing prepares may be used carries on from fire grate Leng Ji to the storage areas as well as the chamotte grinding machines the chamotte the transmission. The gravity whereabouts and transmission usually have to the dust collector's passing wind equipment.

And low energy consumption to low the overriding demand of disappearing is to achieve the revolving furnace revolution is balanced. Therefore, must use the modernized process control technology to the monitoring that the combustion process carries on to continue.

The storage and chamotte rub

The chamotte takes out from the chamotte bunker and delivers to the bunker, before entering the chamotte rubs and additive with the gypsum carries on the allocated proportion mix.

In the chamotte powder rubbing process, the chamotte was ground to the fine dust with other raw materials together, reaches the anhydrites of 5% gypsum or attachment is increased, to control Shui Ni the setting time, simultaneously joins also has other chemical compounds, the example like is used to adjust the fluid or the air content chemical compound. Many factory use rolling type broken broken machine gains to be possible to reduce to the preliminary dimension chamotte and gypsum, these materials sent in the ball grinding afterward (rotary system and vertical steel tube, content steel alloy ball bearing) carry on the other powders to rub the processing.

The powder rubs the process in the loop system, this system provided a spatial disposition to leave the machine, was used to separate the cement pellet according to the size, the material material that has not degraded in size completely had been delivered this system.

This Gao Nenghao's working procedure needs to automate and control of optimization, to guarantee the present quality requirement.