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k8球墨铸铁管厂家处理时烟尘污染环境
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In the competition of material quality, it is very important to improve the strength and toughness of cast iron, to eliminate the inherent defects, to reduce the weight of cast iron, to prolong the service life and to save material. In order to guarantee the reliability and stability of cast iron, it is necessary to have good molten iron quality first. Therefore, must do a good job before the furnace treatment! 1. Desulphurization of molten iron can reduce the amount of spheroidizing agent and the amount of sulfide slag in the casting. The desulphurization process is almost used in the production of ductile iron in developed countries, and S ≤0.01% is required after desulphurization. Under the condition of our country, the target is S ≤0.02% , and the s ≤0.015% can be achieved for tin-chai and chang-chai. The method of NA2CO3 washing into the bottom of the bag is simple and convenient, but the desulphurization rate is low and the effect is not stable. In the large-scale production of ductile iron workshop, it is appropriate to put the desulfurizer on the liquid surface, using mechanical stirring method, shaking bag method or pneumatic stirring method for desulphurization. The pneumatic method is the most popular one because of its simplicity and low power consumption. The pneumatic在材质竞争中,提高铸铁的强度、增加强韧性、消除内在缺陷,对于减轻铸件重量,延长服役期,节约材料是非常重要的。为了保证铸铁性能的可靠性和稳定性,首先必需有良好的铁液质量。因此,一定要做好炉前处理!

1. 脱硫

铁液脱硫可减少球化剂用量和铸件中硫化物夹渣的数量。发达国家球铁生产几乎全部采用脱硫工艺,要求脱硫后S≤0.01%,我国条件下,目标位为S≤0.02%,锡柴和常柴可达到S≤0.015%。

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包底Na2CO3冲入法处理,方法简便但脱硫率低,效果不稳定,k8球墨铸铁管厂家处理时烟尘污染环境,对咽喉有刺激性。在规模生产的球铁车间,宜将脱硫剂置于液面,采用机械搅拌法、摇包法或气动搅拌法进行脱硫。其中气动法较为简单,动力消耗少,最为流行。气动脱硫装置可设于前炉上游,进行连续脱硫,亦可在炉前单包间断脱硫。气动源多为N2。K 8 ductile iron pipe manufacturers, K 7 ductile iron pipe manufacturers, centrifugal ductile iron pipe manufacturers, flexible ductile iron pipe manufacturers, water supply ductile iron pipe manufacturers, drainage ductile iron pipe manufacturers, flexible ductile iron pipe manufacturers

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