A production method of polymetallic ash based on iron ore sintering
A production method and iron ore technology, applied in the field of polymetallic ash production based on iron ore sintering, can solve the problems of shortening furnace life, reducing blast furnace metal yield, deteriorating material column gas permeability, etc., to reduce harmful Element content, reduce production costs, improve the effect of social and economic benefits
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Embodiment 1
[0056] Step (1) Ore blending: Using the red steel sintering batching model, the following ratio ore blending is obtained according to the red steel resource situation, as shown in Table 2.
[0057] Table 2
[0058]
[0059] CaCl with a concentration of 35-40% and a pH of 3-7 will be purchased into the factory 2 Solution, after diluting with water, the CaCl with a concentration of 3% and a pH value of 4 2 Diluent, sprayed evenly on the surface of blast furnace return ore at 0.7kg / t;
[0060] Step (2) Build a pile to obtain a mixed ore: After the ore blending is completed, a 30,000-ton mixed pile is formed, and the stockpile layer is 200 layers / pile. The process of mixing and building a pile uses 3 times of premixing, and the premixing operation All materials are involved, and the flow rate of the heap is 600 tons / h, and then the end of the heap and the end of the heap are cut off and sent to the next heap for mixing to obtain the mixed ore in the middle of the heap;
[00...
Embodiment 2
[0067] Step (1) Ore blending: Using the red steel sintering batching model, the following ratio ore blending is obtained according to the red steel resource situation, as shown in Table 4.
[0068] Table 4
[0069]
[0070] CaCl with a concentration of 35-40% and a pH of 3-7 will be purchased into the factory 2 Solution, after diluting with water, the CaCl with a concentration of 3% and a pH value of 5 2 Diluent, sprayed evenly on the surface of blast furnace return ore at 0.7kg / t;
[0071] Step (2) Build a pile to obtain a mixed ore: After the completion of the ore blending, a 30,000-ton mixed pile is formed, and the stockpile layer is 250 layers / pile. The process of mixing and building a pile uses 4 times of premixing, and the premixing operation The whole material is mined, and the flow rate of the heap is 650t / h, and then the end of the heap and the tail of the heap are cut off and sent to the next heap for mixing to obtain the mixed ore in the middle of the heap;
...
Embodiment 3
[0078] Step (1) Ore blending: Using the red steel sintering batching model, the following ratio ore blending is obtained according to the red steel resource situation, as shown in Table 6.
[0079] Table 6
[0080]
[0081] CaCl with a concentration of 35-40% and a pH of 3-7 will be purchased into the factory 2 Solution, after diluting with water, the CaCl with a concentration of 3% and a pH value of 4 2 Diluent, sprayed evenly on the surface of blast furnace return ore at 0.7kg / t;
[0082] Step (2) Build a pile to obtain a mixed ore: After the completion of the ore blending, a 30,000-ton mixed pile is formed. The stockpile layer is 250 layers / pile. The process of mixing and building a pile uses 5 times of premixing and premixing. Participate in mining all the materials, control the flow rate of the heap at 600 tons / h, then cut off the end and end of the heap and send it to the next heap for mixing to obtain the mixed ore in the middle of the heap;
[0083] Step (3) Prep...
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