Safety problems in the production of new dry cement

Product introduction:https://www.lvssn.com/epc/Dry-Process-Cement-Production-Line.html

NSP cement production technology refers to suspended preheating and precalcining technology as the core, put the latest achievements of modern science and technology and industrial production is widely used in cement production process, the classical tutorial will cement cement craft process summarized as "two grinding burn", namely the limestone and clay as the main raw material, through crushing, ingredients, fine grinding raw materials, feeding in the cement rotary kiln calcining mature material, adding suitable amount of gypsum (sometimes mixed with mixed material or admixture) mill.The safety problems in the production of new dry cement are as follows
 

1. Cement machinery and equipment

The new dry cement production process involves more mechanical equipment, and has the characteristics of large and heavy, mainly conveying equipment, crusher, screw blade, coupling, hoist chain bucket, rotary kiln, mill, etc..If there is no effective protective device for transmission parts and moving parts of these equipment or the production process violates the rules and regulations, it may cause clamping, entanglement, twisting, shearing and other mechanical damage to the personnel on duty.

2. Electrical equipment of cement plant

Electric power system is the main power of the new dry cement production line, and its electrical accidents mainly exist in the substation and the on-site electricity units, the substation potential accidents under certain conditions will cause such as fire, explosion, electric shock, resulting in equipment and property damage.The main causes of electric shock accidents include: personal contact with leakage equipment, accidental contact with live body, approaching high voltage in a less than safe distance, violation of operating rules for live operation and advance transmission, no lightning rod (belt) or lightning arrester (cabinet), etc.
 

3. Storage and collection facilities

In the production process of new dry cement, it is necessary to set up a circular storehouse or a storehouse to measure and store materials for batching.Powder materials, whether coal powder, raw material powder, clinker powder or cement powder, are in a fluid state and stored in a circular warehouse or silo. If personnel fall into it, personal injury or suffocation will be caused, and the material falling into it will damage the batching or feeding equipment at the bottom of the warehouse.The powder materials scattered from the collection and storage facilities are of granular shape, dense and hard, so the operators are easy to slip and fall if they step on them.

 

4. High-altitude operation of bearing facilities

In order to meet the production requirements of batching, conveying, storage, powder selection, dust collection and operation, the corresponding equipment and facilities are arranged on buildings and structures of different heights, such as kiln tail chimney, raw material storage, clinker storage and clinker homogenization storage.In the production operation, personnel inspection, operation, lifting and handling of accessories materials, replacement of materials in the warehouse, and personnel working at the height of walkways, ladders, platforms, etc. If the protective measures are not complete or damaged, personnel operation error, outdoor weather impact, may occur maintenance, inspection personnel fall accident.The accidental fall of an object from high above the ground may also pose a threat to the safety of passing employees on the ground.

 

5. The noise

The equipment that cement factory produces higher noise basically has: break mill, elevator, ball mill, air compressor, ventilator and electric motor.Noise will bring health hazards to the field workers, and long-term work in a high noise environment will cause damage to the human auditory system.Working in a noisy environment, people's attention is not easy to focus, work is easy to make mistakes, not only affect the progress of work, but also easy to cause industrial accidents.
 

6..dust

In the cement production process with a series of production processes will produce large amounts of dust, the crushing, feeding, grinding, conveying, calcination, choose powder, assembly and other major producing dust, if you don't choose the right to control dust, dust collecting equipment is polluting the environment, occupational health and cause serious damage to workers, especially shale dust free SiO2 concentration is higher, comprehensive dust and should be taken to strengthen the combination of dust control of individual protection, prevention of pneumoconiosis.

By analyzing the possible safety problems in the process of the new dry cement production line, it is possible to find the parts where accidents may occur, and trace the causes of accidents according to the specific types of accidents, which can effectively reduce and prevent the occurrence of accidents.At the same time, cement production enterprises should strengthen safety management, safety alarm bell ringing, eradicate paralysis.

The page source:https://www.lvssn.com/Industry/Safety-problems-in-the-production-of-new-dry-cement.html

Maintenance skills of hammer crusher

Product introduction:https://www.cementepc.net/crusher/Hammer-crusher.html

When the hammer crusher is started, the motor will not rotate.If external forces are applied, the motor will rotate but will emit a weak electric sound.At this point, you can think of a leakage of the capacitor.Today to introduce the hammer crusher maintenance skills.

1. The hammer crusher is too loud

If the current sound is too loud, the motor will not start or the capacitor will short-circuit.At this point, have it repaired by a professional maintenance staff.When repairing, if there is no professional maintenance instrument, you can remove the capacitor, plug the two wires into a neutral socket, and connect the cable for charging.Then take out the wire and discharge it.

If an electric spark can be produced, a capacitor can be inherited.If the spark is weak, the capacity of the hammer crusher will be reduced and new capacitors or small capacitors will be needed.However, if the capacitor is damaged, it must be replaced and cannot be treated as described above.

2. Maintenance method of hammer crusher frame to port

For the long term work of the detachable frame, another whole plane of the frame will wear out.In this case, it should be resolved in time.

First, the wear condition of hammer crusher frame is measured, the detailed value of grinding deviation is determined, and then the electric welding planer is carried out.But make sure the center spacing of the original bearing is ensured.

3. Rack crack treatment:

The frame of hammer crusher is an important bearing part, so cracks may appear in the weak part of the frame.If the frame breaks, it can be repaired by welding.The vibration of hammer crusher is intensified during operation, which indicates that there may be uneven wear between the worn parts and the rotor, which is caused by unbalanced state or looseness caused by asymmetric rotor and materials.The pulley.After the normal vibration has been removed, the inspection can be suspended.

In addition, the vibration switch installed on the hammer crusher can be set to take active rest before equipment damage and personal injury occurs when unbalanced vibration is detected.When the crushing and sanding machine is fed, the unbalanced process of about 30~60s usually occurs.In this case, the feed cannot be stopped and increased as much as possible until the vibration is reduced.

The page source:https://www.cementepc.net/productknowledge/Maintenance-skills-of-hammer-crusher.html