海绵铁生产线 鑫虎

The Features of Reduction Technology + Hot Pressing Passivation Technology for Natural Gas Rotary Kiln

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     用***或煤气做热源的回转窑还原技术，再配加二次燃烧室+成品筛分热压块以后，生产工艺与传统的回转窑艺有了很大的区别。

 Reduction technology of rotary kiln using natural gas or gas as heat source and adding secondary combustion chamber + finished product sieving hot pressing block, the production process is quite different from the traditional rotary kiln process.

     1）、回转窑长度变短，一般在40m-60m左右,使***减少；同时由于回转窑变短，回转窑热平衡极易建立，操作变得简单。由于物料在窑内时间变短，同时由于还原采用无  颗粒，强度好，摩擦产生的粉末减少，使窑炉炉衬结圈几率降低 ，设备运行更可靠；

  1). The length of the rotary kiln becomes shorter, generally about 40m-60m, so that the investment is reduced; at the same time, as the rotary kiln becomes shorter, the heat balance of the rotary kiln can be easily established and the operation becomes easier. As the material in the kiln becomes shorter, at the same time, anthracite particles are used for reduction., the iron powder produced by the friction is reduced, so that the kiln furnace liner lining is less likely to be ringed, and the equipment operation is more reliable.

    2）、特殊的加热燃烧和喷煤方式及回转窑二次风机，使回转窑内温度均匀，还原区温度基本在1100℃～1150℃；

The special coal injection method and secondary fan of rotary kiln make the temperature of the short rotary kiln uniform and the kiln tail temperature reaching 1100 ~ 1150 degrees;

 3）、由于尾气中富含煤气，设立二次燃烧室可以燃烧掉尾气中的CO等可燃成分，不仅可以使尾风温度提高到1150℃，而且利用尾风也可保证安全可靠；

Because the exhaust gas is rich in gas, setting up a secondary combustion chamber can burn off the combustible components such as CO in the exhaust gas, which can not only raise the temperature of the exhaust to 1150 C, but also ensure the safety and reliability of the exhaust.

 4）、回转窑排出的混合还原料，经***高温震动筛处理后，纯净高温还原球团直接进入热料压机热压钝化处理，热压块密度可达6.5-6.8t/m³；

the mixed reducing material discharged from rotary kiln is treated by special high temperature shaking screen. The pure high temperature reducing pellet is directly passivated by hot pressing machine. The density of hot pressing pellet can reach 6.5-6.8t/m.

5）、对筛分出的废焦进行处理，大于2mm颗粒可以继续使用，减少了还原剂使用量，降低生产成本；

The sifted waste coke can be treated, and particles larger than 2mm can be used continuously, which reduces the amount of reductant used and reduces the production cost.

 6）、用***或煤气作为热源，CO+    颗粒还原，尾气含尘量大大降低，经除尘器处理后完全可以达到规定的尾气排放标准。

Natural gas or gas is used as heat source and CO + coal particles are reduced, the dust content of tail gas is greatly reduced, and the tail gas can completely meet the prescribed emission standard after being treated by dust collector.

 7）、二次燃烧室将尾气中可燃成分燃烧后排出的高温尾气首***入烧结回转窑对球团加热烧结，然后再进入链板式加热器对冷球团进行烘干， 大限度利用热能，提高能源利用率，降低成本。

The high-temperature exhaust gas from the combustible components in the tail gas of the secondary combustion chamber first enters the sintering rotary kiln to heat and sinter the pellets, and then enters the chain-plate heater to dry the cold pellets, so as to maximize the use of heat energy, improve the utilization rate of energy and reduce costs.