Sintering process of manganese ore powder

A manganese ore powder and process technology, applied in the field of manganese ore powder sintering process, can solve the problems of poor spheroidization of fine-grained manganese ore powder, high solid fuel consumption, poor sinter strength, etc. consumption reduction effect

Active Publication Date: 2013-04-03
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conventional sintering of manganese ore powder still has the problems of high solid fuel consumption, poor sinter strength, and low output, especially the fine-grained manganese ore powder has poor spheroidization and lower sintering output, and the exhaust gas temperature is too high during the sintering process, which seriously affects Equipment life

Method used

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  • Sintering process of manganese ore powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, manganese ore powder from a certain place is selected, and coke powder is used as fuel, wherein 60% of the coke powder is used in step (1), and 40% is used in step (2), such as figure 1 Shown technological process specifically comprises the following steps:

[0024] (1) Preparation of pellets: Mix manganese ore powder, binder, coke powder, quicklime and returned ore with water to form a mixed ore. The mass fraction of each component in the mixed ore is: binder 1.2%, coke powder 3.36%, Quicklime 4.5%, return ore 15%, pelletizing moisture 9.5%, manganese ore powder particle size composition is less than 0.074mm greater than 85.3%, binder is composed of manganate (such as potassium manganate) with a mass fraction of 30%, 10 % sodium humate, 40% polyacrylamide and 20% starch. Pellet the mixed ore on the pelletizing machine, the pelletizing time is 13 minutes, the falling strength of green pellets is 5.6 times / 0.5m, the compressive strength is 12.4N / pc, ...

Embodiment 2

[0027] In this embodiment, manganese ore powder from a certain place is selected, and coke powder is used as fuel, wherein 70% of the coke powder is used in step (1), and 30% is used in step (2), such as figure 1 Shown technological process specifically comprises the following steps:

[0028] (1) Preparation of pellets: Mix manganese ore powder, binder, coke powder, limestone and returned ore with water to form a mixed ore. The mass fraction of each component in the mixed ore is: binder 0.9%, coke powder 3.71%, Limestone 5.0%, return ore 10%, pelletizing water 8.5%, manganese ore powder particle size composition is -0.074mm greater than 85.3%, manganese ore powder grade TMn is 32.3%, binder is made of permanganate with a mass fraction of 10% Salt (such as potassium permanganate), 40% sodium humate, 30% polyacrylamide and 20% starch. Pellet the mixed ore on the pelletizer, the pelletizing time is 13min, the drop strength of green pellets is 4.9 times / 0.5m, the compressive stre...

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Abstract

The invention discloses a sintering process of manganese ore powder. The process comprises the following steps of: adding water to mix manganese ore powder, a binding agent, fuel, a fluxing agent and return ore as mixed ore, wherein the binding agent is formed by mixing manganese salt and organic matter and counts for 0.6-3.0% of mass of the mixed ore, the fuel counts for 3.0-6.0% of mass of the mixed ore, the fluxing agent counts for 3.0-15.0% of mass of the mixed ore, the return ore counts for 10-30% of mass of the mixed ore and the adding amount of water counts for 5.0-15.0% of mass of the mixed ore; preparing the mixed ore as pellets; and then coating a layer of fuel on the surfaces of the generated pellets, drying and preheating, subsequently firing and sintering as hot-sintered ore; and cooling, breaking and screening the hot-sintered ore to obtain finished product sintered ore and return ore. The sintering process of manganese ore powder disclosed by the invention combines the advantages of the pelleting process and the sintering process, so that the strength and the yield of the finished product sintered ore are greatly enhanced and the energy consumption is obviously reduced.

Description

technical field [0001] The invention relates to a manganese ore powder agglomeration process in the field of metallurgy, in particular to a manganese ore powder sintering process. Background technique [0002] Manganese has a wide range of uses and is an important industrial raw material. In modern society, manganese and its compounds are widely used in metallurgy, chemical industry, light industry, medicine, machinery, national defense, communication, agriculture and other industries. In the iron and steel industry, the amount of manganese is second only to iron, and 90% of manganese is consumed in the iron and steel industry. Since manganese has a relatively high affinity with oxygen and sulfur, manganese is a deoxidizer and desulfurizer in the steelmaking process; manganese can Strengthen ferrite and refine pearlite, so it can improve the strength and hardenability of steel, so it is also one of the good alloying elements. In nonferrous metallurgy, manganese can be used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/242C22B47/00
Inventor 赵强宁顺明佘宗华蒙在吉李肇佳陈文勇黄臻高刘建忠
Owner CHANGSHA RES INST OF MINING & METALLURGY
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