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Pretreatment method of marine placer

A sea sand ore pretreatment technology, applied in the field of metallurgy, to achieve the effects of improving smelting reaction efficiency, increasing contact area, and increasing output

Inactive Publication Date: 2015-05-06
张诚 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are great shortcomings in the pretreatment of sea placer in the related art, and there is a demand for improvement

Method used

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  • Pretreatment method of marine placer
  • Pretreatment method of marine placer

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Embodiment 1

[0058] The vanadium-titanium magnetite sea placer is dried to make the moisture content in the range of 1 to 2% by weight; the anthracite is crushed to obtain coal powder with a particle size of not more than 1 mm. 225Kg of dried vanadium-titanium magnetite sea placer, 55Kg of anthracite coal powder and 1Kg of carboxymethyl cellulose and corn starch are mixed uniformly using a combination of rotating chassis and multi-axis slurry, and the uniformity reaches 90%. A pair of roller briquetting machine is used to compress the mixture material to obtain a rectangular sea sand ore briquette with length, width and height of 40*22*13.

[0059] The cloth in the rotary hearth furnace of the sea placer briquette is controlled, the temperature in the rotary hearth furnace is controlled to be 1300-1400 degrees Celsius, and the smelting process is performed for 15-30 minutes to obtain reduced iron. By preparing vanadium-titanium magnetite sea placer into sea placer briquette and then smelting,...

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Abstract

The invention provides a pretreatment method of marine placer. The pretreatment method comprises the steps of performing drying treatment on the raw marine placer and pulverized coal to obtain dry marine placer and dry pulverized coal, mixing the dry marine placer, the dry pulverized coal and a binder to obtain a mixture, and pressing the mixture to obtain a marine placer briquette. The pretreatment method is capable of effectively preparing the marine placer into the marine placer briquette, and then the efficiency and the yield of preparing direct reduction iron from the marine placer can be improved remarkably.

Description

Technical field [0001] The present invention relates to the field of metallurgy. Specifically, the present invention relates to a pretreatment method of sea placer and a method for preparing direct reduced iron using sea placer. Background technique [0002] Sea placer, such as vanadium-titanium magnetite sea placer, ilmenite sea placer, vanadium-titanium magnetite river placer and ilmenite river placer, are formed by the impact of the ocean or river, and become sand-like particles with coarse grain size. It is 0.053-0.35mm, and the surface is smooth. Before smelting, there are currently only two methods for pretreatment of sea placer: one is to directly roast the original sea placer; the other is to wet-grind into powder and then pelletize and roast. Specifically, the original sea placer is wet-ground into powder. , Use a disc pelletizer or a cylinder pelletizer to roll the water-bonded mineral powder into a ball, and then bake the water-containing pellets to a high temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244C21B13/00
CPCC22B1/244C21B13/00
Inventor 张诚屈野
Owner 张诚
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