鑫虎天然氣回轉窯還原技術+熱壓成型鈍化工藝主要特點

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

     用天然氣或煤氣做熱源的回轉窯還原技術，再配加二次燃燒室+成品篩分熱壓塊以后，生產工藝與傳統的回轉窯藝有了很大的區別。

 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）、回轉窯長度變短，一般在40m-60m左右,使投資減少；同時由于回轉窯變短，回轉窯熱平衡極易建立，操作變得簡單。由于物料在窯內時間變短，同時由于還原采用顆粒，強度好，摩擦產生的粉末減少，使窯爐爐襯結圈幾率降低 ，設備運行更可靠；

  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）、特殊的加熱燃燒和噴煤方式及回轉窯二次風機，使回轉窯內溫度均勻，還原區溫度基本在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）、由于尾氣中富含煤氣，設立二次燃燒室可以燃燒掉尾氣中的CO等可燃成分，不僅可以使尾風溫度提高到1150℃，而且利用尾風也可保證安全可靠；

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）、回轉窯排出的混合還原料，經特制高溫震動篩處理后，純凈高溫還原球團直接進入熱料壓機熱壓鈍化處理，熱壓塊密度可達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）、對篩分出的廢焦進行處理，大于2mm顆粒可以繼續使用，減少了還原劑使用量，降低生產成本；

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）、用天然氣或煤氣作為熱源，CO+顆粒還原，尾氣含塵量大大降低，經除塵器處理后完全可以達到規定的尾氣排放標準。

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）、二次燃燒室將尾氣中可燃成分燃燒后排出的高溫尾氣首先進入燒結回轉窯對球團加熱燒結，然后再進入鏈板式加熱器對冷球團進行烘干， 大限度利用熱能，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.