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Iron ore powder sintering-free cold-pressing balling method

A technology of cold pressing into balls and iron ore powder, which is applied in the field of pretreatment of metallurgical raw materials, can solve the problems of high cost and cumbersome process, and achieve the effects of avoiding waste, improving utilization rate, and avoiding dust generation

Inactive Publication Date: 2005-05-04
马万龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The methods described in the above patent applications all have disadvantages such as cumbersome process and high cost. It can be seen that there is still a need for a method for iron ore powder to be burnt-free and cold-pressed into balls with simple process, no need for sintering and drying, and low cost. To continuously adapt to the needs of the metallurgical industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the following weight ratio, stir and mix each component evenly to prepare 100kg of waterproof and anti-seepage glue:

[0023] Acrylic 25%

[0024] Styrene 5%

[0025] Butyl methacrylate 5%

[0026] Polyvinyl alcohol 45%

[0027] Vinyl acetate 15%

[0028] Tributyl Phosphate 0.17%

[0029] Polyacrylate dispersant 3%

[0030] Maleic anhydride 1%

[0031] Sodium sulfonate castor oil 0.8%

[0032] Anti-Aging Agent 0.03%.

[0033] Add 100kg of polyacrylonitrile with a purity of 99% into the reaction kettle, add 800kg of water, heat up to 80°C under stirring, add 1kg of hydrogen peroxide, 2kg of sodium dodecylbenzoate, and react for 2 hours to obtain a polyacrylonitrile with a viscosity of 1000CPS. Polyacrylonitrile emulsion.

[0034] The iron ore with 57% iron content is pulverized into a powder with a diameter of 1 mm to obtain 1225 kg of iron ore powder, 3 kg of active calcium powder is added to the iron ore powder, stirred, and mixed evenly, then 67 ...

Embodiment 2

[0038] According to the following weight ratio, stir and mix each component evenly to prepare 100kg of waterproof and anti-seepage glue:

[0039] Acrylic 35%

[0040] Polyurethane 5%

[0041] Mica powder 10%

[0042] Lithopone 20%

[0043] Titanium dioxide 15%

[0044] Aluminum silicate 10%

[0045] Dibutyl phthalate 3%

[0046] Octylphenol ethoxylate 2%.

[0047] Add 400kg of water and 4kg of polyvinyl alcohol into the reactor, heat up to 65°C under stirring, add 20kg of polyacrylonitrile with a purity of 99% and 0.2kg of ammonium persulfate into the reactor, and add 80kg of polyacrylonitrile and Add 0.2 kg of ammonium persulfate continuously to the reactor within 2 hours, add 0.1 kg of ammonium persulfate after reacting for 0.5 hours, react for 0.5 hours, adjust the pH to neutral to obtain a polyacrylonitrile emulsion with a viscosity of 10,000 CPS.

[0048] Crush the iron ore into particles with a diameter of 4 mm. After flotation, 1020 kg of iron ore particles are o...

Embodiment 3

[0050] According to the following weight ratio, stir and mix each component evenly to prepare 100kg of waterproof and anti-seepage glue:

[0051] Acrylic 22.49%

[0052] Styrene 8%

[0053] Butyl methacrylate 3%

[0054] Polyvinyl alcohol 50%

[0055] Vinyl acetate 10%

[0056] Tributyl Phosphate 0.5%

[0057] Polyacrylate dispersant 4%

[0058] Maleic anhydride 1.5%

[0059] Sodium sulfonate castor oil 0.5%

[0060] Anti-Aging Agent 0.01%.

[0061]Add 100kg of polyacrylonitrile with a purity of 99% into the reaction kettle, add 300kg of water, heat up to 60°C with stirring, add 70kg of ethyl acetate, 1kg of sodium metabisulfite, 0.5kg of sodium fluorosilicate, octylphenol polyoxyethylene 2kg of ether was reacted for 4 hours to obtain a polyacrylonitrile emulsion with a viscosity of 3000CPS.

[0062] The iron ore is crushed into a powder with a diameter of 2mm to obtain 1111kg of iron ore powder, and 5kg of Ca(OH) 2 Add iron ore powder to the powder, stir, and mix ev...

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Abstract

This invention introduces a way to turn the ore powder into pelletization through cold compression and free from burning, belonging to preprocessing area of metallurgic raw material, specifically, the initial processing area of ore. The way is as following: the ore is grounded into the grains with their diameters less than 4mm, and the powder containing calcium is put into the ore powder. Then they should be stirred and mixed evenly. Next they are added polyacrylic latex and stirred again until they are even, lastly they are added waterproof and impermeable gum and stirred evenly. The homogeneous mixture will be struck out under 80kg pressure 3-6cm-diameter bulbs or masses with 100-900cm volume. The added the powder containing calcium, polyacrylic latex and waterproof and impermeable gum should have the following proportion in weight respectively: 3-7; 63-67; 28-32. The total weight of the three materials will be 8-10% of the ore powder's weight. This invention can produce good hardness goods and doesn't need any baking, so it has a low cost and helps lowering the cost in metallurgic industry.

Description

technical field [0001] The invention relates to the field of pretreatment of metallurgical raw materials, in particular to a method for forming iron ore powder into balls without burning and cold pressing. Background technique [0002] Due to the widespread existence of low-content iron ore, lean ore should be pretreated before smelting and iron smelting to improve product quality and production efficiency, promote iron-making processes to increase production, save energy, and improve economic benefits. The lean ore is crushed for pretreatment, and after flotation, the iron ore powder with high iron content is obtained, and the iron ore powder is sintered together with other auxiliary materials to make a ball or block for use in the subsequent process. Among them, the consolidation status of iron ore powder is one of the important indicators. The conventional method is usually to add a binder and mix it and sinter it into agglomerates. [0003] The patent for invention with...

Claims

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Application Information

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IPC IPC(8): C22B1/244
Inventor 马万龙
Owner 马万龙