Precautions for powder metallurgy manufacturers

Safety inspection usually refers to the thorough and careful investigation and study of various things and human factors (such as machines, equipment, processes, etc.) that affect normal production in the normal production process of the factory, so as to find and find unsafe factors. The purpose of safety inspection is to find and eliminate potential accidents. That is to say, how to carry out safe production in order to eliminate various possible accidents, prevent hazards and nip in the bud? Lianyungang Dongmu Powder Metallurgy Factory strictly abides by the 6S standard. The management at all levels of the powder metallurgy workshop should be strictly managed, the safety work should be combined with the actual situation, and the work should be rigorous, careful and solid. Strict enforcement is the principle of severe punishment in safety management, and should be treated equally. The workshop must be equipped with protective equipment, and the safety awareness should start from its own. The powder metallurgy workshop is different from other production workshops, which has the danger of metal dust. It should be protected from a mask, gloves and other subtle safety protection, so as to ensure safety without dead angle, prevent the invasion of subtle metal dust, prevent the growing sense of subtle insecurity, and prevent the safety work from being a little false. We should proceed from the actual environment. In the face of the production workshop with metal dust, leaders at all levels need to set an example, go deep into practice, and put it into practice. Because accidents occur frequently in powder metallurgy plants and have great consequences, metal powders themselves are natural, explosive and toxic, but they cause much less environmental pollution than traditional casting and forging processes. The following is an analysis of the harm of metal dust from powder metallurgy manufacturers.

If the raw material metal powder of the powder metallurgy factory can react with air under normal ambient temperature, it is considered that this metal powder is self ignitable and must be provided with an independent production and storage place. The figure below shows the raw material warehouse of the powder metallurgy factory.

Spontaneous combustion and explosion

The spontaneous combustion of metal powder depends on the chemical reactivity of the metal and the non surface of the powder. The chemical reactivity of metal can make metal powder ignite, that is, powder metallurgy can ignite at a lower temperature than the ignition temperature of bulk metal. The reason is that the powder produced by air has a larger surface knot, so it is easier to ignite spontaneously. That is, the ignition temperature is related to the surface of the powder. In addition to the possibility of spontaneous combustion caused by the contact surface with air, the unsafe factor more determined is the particle size of the powder. However, particle shape also has a strong influence on surface area combustion. For example, under the same particle size of the same metal powder, the spherical powder can not be naturally burned, while the flaky powder can be naturally burned. The reason why the specific surface is important is that the atoms on the particle surface react with the oxygen in the air, and the heat of the oxidation reaction can increase the temperature of the powder particles. In the fine powder, due to the large number of surface atoms, if the heat generated by oxidation exceeds the heat emitted in the environment, the temperature of the powder will accelerate to reach the ignition temperature of the bulk metal.

After the combustion of the spontaneous combustion powder is completely accelerated, the metal particles will float in the air and form dust clouds before combustion. For powder metallurgy manufacturers, if an accident occurs, this dust cloud may catch fire and explode under uncontrollable conditions. Powder metallurgy plants use many raw materials to produce powder metallurgy products, including iron, carbon, copper, nickel, molybdenum, aluminum, titanium, magnesium, etc. Almost all metal powders are explosive, but aluminum, magnesium, and titanium powders have relatively high explosive strength.

toxicity

First, analyze the harm of dust to the body. If you work in a workshop with powder for a long time, your health may be harmed. The scope of harm ranges from minor harm to occupational disease, which may be life threatening. The health damage related to dust environment depends on the type of dust (physical, chemical, mineral characteristics) and exposure state. The exposure state depends on dust concentration, particle diameter of dust and exposure time (duration), and is affected by respiratory conditions (such as respiratory rate and volume). Short term exposure to harmful dust has no significant impact on health, only long-term exposure can be significant. Chronic problems, which are often overlooked or made mistakes, are considered to be caused by non professional environment. Therefore, it is stipulated in the production guidelines of Lianyungang Dongmu Powder Metallurgy Factory that prevention is more important than compensation, special masks must be worn to meet the requirements of standing guard, observe 6S and protect yourself. This kind of risk can be light or heavy. Therefore, only by working together, paying close attention to joint management and safe production, and comprehensively improving the safety management level of the enterprise, can we ensure the safety, high yield, high efficiency, health and other conditions of the enterprise to * * * improve the economic efficiency of the enterprise.

Standardizing safety work is not an overnight thing, nor can it be solved by one person's ability. It is restricted by various factors. The effective measures to reverse the unsafe situation are to strengthen the supervision of the production process, vigorously standardize the on-site safety measures, strengthen the illegal on-site treatment of personnel, constantly standardize the on-site work behavior, implement standardized work, and transfer the analysis to the process supervision after the actual safety work, so as to achieve the safety management gateway.