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A low-grade iron ore beneficiation equipment and method thereof

A mineral processing equipment and mineral processing method technology, applied in the field of mineral processing equipment, can solve the problems of large resource waste, poor effect, low mineral processing recovery rate, etc., and achieve the effect of large transmission power, increased contact area, and large heat transfer area

Active Publication Date: 2017-12-01
俞佳鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In view of this, the object of the present invention is to provide a low-grade iron ore beneficiation equipment and method thereof, which overcomes the poor effect of the existing iron ore beneficiation methods on low-grade iron ore, low beneficiation recovery rate and resource waste of large technical flaws

Method used

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  • A low-grade iron ore beneficiation equipment and method thereof
  • A low-grade iron ore beneficiation equipment and method thereof
  • A low-grade iron ore beneficiation equipment and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] as attached figure 1 As shown, a specific embodiment of a low-grade iron ore beneficiation equipment includes: No. 1 furnace on the first floor, No. 2 furnace located at the bottom of No. 1 furnace, and a cooling reduction system located at the bottom of No. 2 furnace. Roasting materials generally include a certain proportion of iron ore raw ore powder, coke powder and biomass. The roasted material including low-grade iron ore enters the inside of the barrel 1 of the No. 1 furnace through the top of the No. 1 furnace for distribution, dehydration, drying, preheating and low-temperature roasting. After low-temperature roasting, the calcined material and reducing agent enter the No. 2 furnace, where unloading, mixing and reduction reactions are carried out, and then enter the cooling reduction system. When mixing and reducing in the No. 2 furnace, waste heat is used for heat preservation. The reduced roasted material passes through the reduction pipe of the cooling redu...

Embodiment 2

[0057] as attached Figure 7 As shown, it is a complete operation process of low-grade iron ore beneficiation method, including the following steps:

[0058] Crushing and grinding of alternative low-grade iron ore;

[0059] Formulate alternative low-grade iron ore, mainly by adding biomass and coke powder;

[0060] Granulate the selected low-grade iron ore that has been formulated into a roasted material;

[0061] The roasted material is dehydrated, dried and preheated in the No. 1 furnace;

[0062] The roasted material is roasted at a low temperature in the No. 1 furnace;

[0063] The roasted material roasted at low temperature undergoes reduction reaction in the No. 2 furnace;

[0064] The calcined material after the reduction reaction is reduced and cooled in the cooling reduction system;

[0065] After reduction and cooling, the roasted material is quenched and then subjected to magnetic separation.

specific Embodiment

[0066] A specific embodiment of a method for utilizing the above-mentioned equipment to carry out low-grade iron ore beneficiation, comprising the following steps:

[0067] S101: The roasted material including low-grade iron ore enters the cylinder body 1 of the No. 1 furnace through the top of the No. 1 furnace, and carries out distribution, dehydration, drying, preheating and low-temperature roasting;

[0068] S102: The roasted material (also known as clinker) and the reducing agent after low-temperature roasting enter the No. 2 furnace, and enter the cooling reduction system after unloading, mixing and reduction reactions in the No. 2 furnace;

[0069] S103: The reduced roasted material passes through the reduction pipe of the cooling reduction system for secondary reduction, and then is cooled by the cooling pipe, and then sent to the quenching pool for quenching operation;

[0070] As a preferred specific embodiment of the method of the present invention, the above-mentio...

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Abstract

The invention discloses a low-grade iron ore beneficiation equipment and a method thereof. The equipment includes a No. 1 furnace, a No. 2 furnace, and a cooling reduction system. The roasted material enters the cylinder of the No. 1 furnace through the top of the No. 1 furnace for distribution, dehydration, drying, preheating and low-temperature roasting. After low-temperature roasting, the roasted material and reducing agent enter the No. 2 furnace, where they are mixed and reduced, and then enter the cooling reduction system. The reduced roasted material passes through the reduction pipe of the cooling reduction system for secondary supplementary reduction, and then passes through the cooling pipe for cooling, and then is sent to the quenching pool for quenching operation. Cloth, dehydration, drying, preheating, low-temperature roasting, unloading, reduction, secondary reduction and cooling operations are all carried out in a rotating state. The invention can overcome the technical defects of poor beneficiation effect on low-grade iron ore, low beneficiation recovery rate and large waste of resources in the existing beneficiation method.

Description

technical field [0001] The invention relates to an ore dressing equipment and a method thereof, in particular to a kind of equipment and a method for ore beneficiation of low-grade iron oxide ore whose mass content of iron in the iron ore is 20% to 45%. Background technique [0002] According to the existing data, the iron ore resources in our country are generally abundant but not rich. Among the proven reserves of nearly 60.7 billion tons, 97% is lean iron ore, and its average grade is 33%, which is 11 percentage points lower than the world's average iron ore grade. Among them, the current reserves of iron ore resources that are temporarily difficult to use due to complex ore components and difficult selection have reached 12.4 billion tons, accounting for 21% of the total reserves of iron ore resources. [0003] Even so, there are still quite a large number of ore veins with good mining conditions in my country's iron ore resources. These iron ore resources can be mined...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B1/26
Inventor 俞朱顺
Owner 俞佳鹏
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