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Pellelizing technology suitable for biological dump leaching and extracting metal

A technology for extracting metals and biological piles, applied in the direction of improving process efficiency, etc., can solve problems such as unsuitable and complicated processes

Inactive Publication Date: 2007-04-11
有研资源环境技术研究院(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material processed by the existing mineral powder granulation process is mainly iron ore powder. The surface of iron ore is highly hydrophilic, and the pelletizing process is easy to pelletize. Balls; In terms of granulation process, most of the existing granulation process routes are from slag powder granulation to wet ball drying to dry ball roasting into balls, and the finished balls enter the blast furnace or rotary kiln without dripping or soaking. This traditional process is relatively complicated and not suitable for the requirements of bioheap leaching to extract metals. Therefore, it is necessary to provide a simple granulation process; because in the process of bioleaching, sulfide ore particles will be oxidized and decomposed, and pellets will be affected. Sour water immersion and biological corrosion, so the finished ball should have special properties such as corrosion resistance and water resistance, and the heaping should ensure good permeability and leaching during the leaching process without collapsing or sinking; Binder should be easy to obtain, cheap, and have no negative impact on bacterial growth in the leaching process and recovery of metal ions in the leachate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] First, the dry nickel-cobalt-copper ore concentrate with a very fine particle size (0.076mm accounts for more than 75%) is mixed with a composite binder composed of an organic binder and an inorganic binder. In terms of the weight percentage of the binder, wherein the inorganic binder is a mixture of bentonite and limestone, the mixing ratio is 1:4, and the amount used is 0.8% to 4% of the concentrate amount, and the organic binder is carboxymethyl cellulose and starch mixture, the mixing ratio is 1:1, and the amount used is 0.02% to 1% of the concentrate amount, (wherein the ratio of organic binder to inorganic binder is 15-10:1-1.5), so that Composite binder and mineral powder are fully mixed, the amount of composite binder is 0.8% to 2% of the concentrate amount, and then add 6 to 10% of the concentrate weight percentage of tap water, continue to mix, so that the mineral powder And the surface of the adhesive fully absorbs water, and it is placed for 30 to 60 minutes...

Embodiment 2

[0016] The dry tailings of nickel-cobalt-copper ore are used as raw materials, and its implementation steps are the same as in Example 1.

[0017] First, the dry tailings of nickel-cobalt-copper ore with very fine particle size (0.076mm accounts for more than 75%) are mixed with a composite binder composed of an organic binder and an inorganic binder. In terms of the weight percentage of the binder, the inorganic binder is bentonite, diatomite, limestone, dolomite, and gypsum, and the mixing ratio is 1:1:1:1:1, and the amount used is 0.5% to 0.5% of the concentrate amount. 3%, the organic binder is carboxymethyl cellulose and polyacrylamide, the mixing ratio is 1:1, and the amount used is 0.02-1% of the tailings amount, so that the composite binder and mineral powder are fully mixed, The amount of the composite binder is 0.8% to 2% of the tailings amount, wherein the ratio of the organic binder to the inorganic binder is 15-10:1-1.5, and then 6-2% of the tailings weight percen...

Embodiment 3

[0019] The raw material for pelletizing is nickel-cobalt-copper ore wet tailings powder, and the pelletizing process is as follows: firstly, the wet tailings of nickel-cobalt-copper ore with very fine particle size (0.076mm accounts for more than 75%) are combined with organic binder and inorganic binder. The composite binder of binder combination is mixed, and the addition amount of binder is based on ore powder and binder weight percent, and inorganic binder is bentonite, diatomite, limestone, dolomite, and gypsum, and the mixing ratio is 1 : 1:1:1:1, the amount used is 0.5% to 4% of the tailings amount, the organic binder is carboxymethyl cellulose, starch and papermaking waste liquid, the mixing ratio is 1:1:6, adding The ratio is 0.5-1%, so that the composite binder and the mineral powder are fully mixed, and the amount of the composite binder is 0.8%-2% of the tailings amount, wherein the ratio of the organic binder to the inorganic binder is 15-10: 1-1.5, then add 3% ta...

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Abstract

A granulating technology suitable for biologic extraction of metal includes mixing the powdered ore of metallic sulfide with adhesive, granulating by 5-25 mm for granularity, and natural drying by covering with air-permeable object. Its advantages are enough strength and high penetrability of their stack.

Description

technical field [0001] The invention relates to a fine ore granulation process, in particular to a granulation process suitable for extracting metals by biological heap leaching. Background technique [0002] Bioheap leaching technology provides a good way for resource processing and metal extraction due to its advantages of small investment, short process flow, low energy consumption, environmental friendliness, and wide resource utilization. At present, the resources treated by bioheap leaching are raw sulfide ores Ore, the ore is crushed to a size of 10-50mm, and then heap leached, but it is difficult to carry out biological heap leaching on the concentrate and tailings, because the particle size of the concentrate and tailings is small, generally 0.076mm, to achieve For the biological heap leaching technology of sulfide ore concentrate and tailings, it is necessary to pelletize the concentrate and tailings to make the particle size reach more than 5mm. After building the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/14C22B3/18
CPCY02P10/20
Inventor 李宏煦温建康阮仁满宋永胜
Owner 有研资源环境技术研究院(北京)有限公司
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