Method for manufacturing sintered ore

Abstract

To stably obtain a high yield.SOLUTION: A method for manufacturing a sintered ore includes: a granulation step of blending a sintered raw material containing a plurality of types of iron ores, an auxiliary raw material and a coagulation material, and performing granulation treatment in a granulating machine; a sintered raw material charging step of charging the sintered raw material discharged from the granulating machine into a sintering machine by the charging device; a sintering step of sintering the charged sintered raw material and manufacturing a sintered cake; and a classification step of sieving the sintered cake into a product sintered ore and return fines by a classifying device, and further includes: a product sintered ore analysis step of analyzing the component content of the product sintered ore; a return fine analysis step of analyzing the component content of the return fines; and an ignition condition changing step of changing an ignition condition of an ignition furnace in the sintering step, on the basis of the component content of the product sintered ore and the component content of the return fines obtained in each of the product sintered ore analysis step and the return fine analysis step.SELECTED DRAWING: Figure 1

Claims

1. A granulation step of blending a sintering raw material containing a plurality of types of iron ores, auxiliary raw materials, and a binder, and performing granulation treatment with a granulator; A sintering raw material charging step of charging the sintering raw material discharged from the granulator into a sintering machine by a charging device; A sintering step of sintering the charged sintering raw material with a firing furnace to produce a sintered cake; A classification step of screening the sintered cake into a finished sintered ore and a return ore with a classifier; and has, Further, A finished sintered ore analysis step of analyzing the component content of the finished sintered ore; A return ore analysis step of analyzing the component content of the return ore; Based on the component content of the finished sintered ore and the component content of the return ore obtained in the finished sintered ore analysis step and the return ore analysis step, respectively, a firing condition changing step of changing the firing conditions of the firing furnace in the sintering step; A method for producing sintered ore having.

2. The method for producing sintered ore according to claim 1, wherein the finished sintered ore being conveyed by a conveying means in the finished sintered ore analysis step, and / or the return ore being conveyed by a conveying means in the return ore analysis step is directly analyzed.

3. The method for producing sintered ore according to claim 1, wherein the component content analyzed in the finished sintered ore analysis step and the return ore analysis step is the CaO content.

4. The component content analyzed in the finished sintered ore analysis step and the return ore analysis step is the CaO content, In the firing condition changing step, the firing conditions are changed based on the difference (ΔCaO) between the CaO content of the return ore and the CaO content of the finished sintered ore. The method for producing sintered ore according to claim 1.

5. The method for producing sintered ore according to claim 1, wherein the change of the firing conditions in the firing condition changing step is performed by changing the firing intensity of the firing furnace.

6. In the finished sinter ore analysis step and the returned ore analysis step, the analysis of the component content of the finished sinter ore and the component content of the returned ore is performed using laser-induced breakdown spectroscopy (LIBS). The method for producing sinter ore according to any one of claims 2 to 5.

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