Suspension roasting manganese and iron treatment method of iron-contained manganese ore

A separation treatment and suspension roasting technology, which is applied in the field of mineral processing, can solve the problems of complex process, low processing capacity and high energy consumption for blending bituminous coal.

Active Publication Date: 2017-12-29
NORTHEASTERN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Patent CN 201510844742.7 relates to a low-grade high-iron manganese ore reduction roasting process, which proposes to directly use low-grade high-iron manganese ore as the ore source, use a large-scale rotary kiln to reduce it into raw materials for the preparation of manganese sulfate, electrolytic manganese dioxide, and electrolytic manganese, and leaching filter residue magnetic selection and recovery of contained iron, this patent can realize the comprehensive utilization of manganese and iron resources, but the conventional calcination equipment of rotary kiln is used, the processing capacity is low, the reduction effect is poor, and the process of blending bituminous coal is complicated; the patent 201410038273.5 involves an intensified The additi

Method used

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  • Suspension roasting manganese and iron treatment method of iron-contained manganese ore
  • Suspension roasting manganese and iron treatment method of iron-contained manganese ore
  • Suspension roasting manganese and iron treatment method of iron-contained manganese ore

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Process such as figure 1 shown;

[0029] Crush the iron-manganese ore to a particle size of 2-20 mm, and then grind the ore to a particle size of -0.074 mm, accounting for 50% of the total weight, to make fine ore;

[0030] The powder ore is subjected to a stage of weak magnetic separation, with a magnetic field strength of 2000Oe, to obtain a stage of weak magnetic separation concentrate and a stage of weak magnetic separation tailings;

[0031] Put a section of weak magnetic separation tailings in the roasting furnace, feed gas and air to keep a section of weak magnetic separation tailings in a suspended state, and oxidize and roast a section of weak magnetic separation tailings at a roasting temperature of 800°C for a roasting time of 20 minutes. Volatilize water and other volatile components, and oxidize iron to Fe 2 o 3 , to obtain oxidized powder ore; the flow rate of gas and air is 13m per ton of weak magnetic separation tailings 3 / h; oxidation roasting proc...

Embodiment 2

[0037] Method is with embodiment 1, and difference is:

[0038] (1) Crushing the iron-manganese-containing ore to a particle size of 2-20 mm, and then grinding the ore until the part with a particle size of -0.074 mm accounts for 60% of the total weight to make fine ore;

[0039] (2) The magnetic field strength of a section of weak magnetic separation is 1800Oe;

[0040](3) Oxidation roasting temperature 900°C, time 12min, to volatilize water and other volatile components, and oxidize iron to Fe 2 o 3 , to obtain oxidized powder ore; the flow rate of gas and air is 19m per ton of weak magnetic separation tailings 3 / h;

[0041] (4) The reduction roasting temperature is 600°C, the time is 8min, and the reducing gas is H 2 , the flow rate of reducing gas is H 2 The total amount is 10m 3 / h; the ratio of nitrogen and reducing gas is 3:1;

[0042] (5) The magnetic field strength of the second-stage weak magnetic separation is 1800Oe;

[0043] (6) iron grade TFe of finished...

Embodiment 3

[0045] Method is with embodiment 1, and difference is:

[0046] (1) Crushing the iron-manganese-containing ore to a particle size of 2 to 20 mm, and then grinding the ore until the particle size of -0.074 mm accounts for 70% of the total weight to make fine ore;

[0047] (2) The magnetic field strength of a section of weak magnetic separation is 1300Oe;

[0048] (3) Oxidation roasting temperature 950°C, time 8min, to volatilize water and other volatile components, and oxidize iron to Fe 2 o 3 , to obtain oxidized powder ore; the flow rate of gas and air is 5m per ton of weak magnetic separation tailings 3 / h;

[0049] (4) The reduction roasting temperature is 700°C, and the time is 5 minutes, wherein the reduction gas is coal gas, and the flow rate of the reduction gas is based on the amount of CO and H introduced per ton of oxidized ore powder. 2 The total amount is 5m 3 / h; the ratio of nitrogen and reducing gas is 4:1;

[0050] (5) The magnetic field strength of the s...

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Abstract

The invention relates to a suspension roasting manganese and iron treatment method of iron-contained manganese ore, and belongs to the technical field of mineral processing. The method includes the following steps that (1) the iron-contained manganese ore is crushed to be subject to ore grinding; (2) first-section low-intensity magnetic separation is carried out; (3) first-section low-intensity magnetic separation gangue is placed into a roasting furnace, gas and air are led in, and the first-section low-intensity magnetic separation gangue is subject to oxidizing roasting; (4) a reduction roasting furnace is adopted, and oxidization powder ore is placed into the reduction roasting furnace to be subject to reduction roasting; (5) roasted ore is subject to second-section low-intensity magnetic separation; and (6) first-section low-intensity magnetic concentrate and second-section low-intensity magnetic concentrate are merged to serve as an iron ore concentrate finished product. The suspension roasting manganese and iron treatment method is simple in technological process, large in equipment treatment amount, easy in product character control, capable of achieving industrialized application, capable of achieving energy conservation and environmental protection and capable of easily achieving large scale.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a method for separating ferromanganese by suspending roasting ferromanganese ore. Background technique [0002] my country's high-quality manganese ore and iron ore resources are increasingly scarce due to the huge consumption of the iron and steel industry. However, there are a large number of ferromanganese ore resources with high iron content in my country, which have not been effectively utilized on a large scale. The manganese minerals in the ferromanganese ore resources are mainly rhodochrosite and pyrolusite, and the iron minerals are mainly hematite, goethite, and limonite. , Siderite, etc., to realize the effective utilization of iron and manganese resources in ferromanganese ores is of great significance to alleviate the shortage of self-produced iron and manganese resources in my country. [0003] Patent CN 201510844742.7 relates to a low-grade high-iron man...

Claims

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Application Information

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IPC IPC(8): C22B1/02
CPCC22B1/02
Inventor 韩跃新袁帅李艳军高鹏
Owner NORTHEASTERN UNIV
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