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Method for coproducing tricalcium phosphate and ferric oxide by virtue of phosphated waste residues

A technology of phosphating waste residue and tricalcium phosphate, which is applied in the fields of iron oxide, chemical instruments and methods, iron oxide/iron hydroxide, etc. problems, to achieve significant economic benefits and environmental protection value, reduce the degree of environmental pollution, and avoid the effect of waste liquid discharge

Active Publication Date: 2015-03-04
GUIZHOU RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology improves how we dispose of used building material by recycling it back into new concrete or create other useful substances that can be reused for future purposes without causing harmful side-effects on our surrounding areas.

Problems solved by technology

This patented technical problem addressed by the present study relates to finding ways to use excessive amounts of phosphonation waste (P) generated when producing metallic plugs with aluminium alloys without causing environmental concerns due to their harmful effects on water quality and wildlife habitats. Current disposal options involve dumpage at an offshore facility where P has been dissolved away over many years. Therefore there needs better solutions to recycle these waste sources while reducing negative impacts upon both ecologically sound environments and human health issues associated with traditional approaches like incinerators.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for producing tricalcium phosphate and co-producing iron oxide by utilizing phosphating waste residue, comprising the following steps:

[0021] (1) Pretreatment of phosphating waste slag: put phosphating waste slag in a pulverizer and pulverize it into 100-mesh powder, then put the powder in the pretreatment tank, and mix according to the ratio of powder to oxidizing acid of 2:1, When mixing, add oxidizing acid to the pretreatment tank, and use a stirring speed of 30r / min for stirring treatment. After the addition of oxidizing acid is completed, continue stirring at a stirring speed for 30min, adjust the temperature to 30°C, and Set aside for 20 minutes, then add water twice the weight of the powder to it, and adjust the stirring speed to 100r / min. After stirring continuously for 30 minutes, stop stirring, and filter it to obtain the filter residue and filtrate, and transport the filter residue to the building materials factory for production Building materials...

Embodiment 2

[0032] A method for producing tricalcium phosphate and co-producing iron oxide by utilizing phosphating waste residue, comprising the following steps:

[0033] (1) Pretreatment of phosphating waste slag: put phosphating waste slag in a pulverizer and pulverize it into 120-mesh powder, then put the powder in the pretreatment tank, and mix according to the ratio of powder to oxidizing acid of 3:1, When mixing, add oxidizing acid to the pretreatment tank, and use a stirring speed of 50r / min for stirring treatment. After the addition of oxidizing acid is completed, continue stirring at a stirring speed for 50min, adjust the temperature to 55°C, Set aside for 40 minutes, then add water 3 times the weight of the powder, and adjust the stirring speed to 120r / min. After stirring continuously for 60 minutes, stop stirring, and filter it to obtain the filter residue and filtrate, and transport the filter residue to the building materials factory for production Building materials, the fi...

Embodiment 3

[0044] A method for producing tricalcium phosphate and co-producing iron oxide by utilizing phosphating waste residue, comprising the following steps:

[0045] (1) Pretreatment of phosphating waste slag: put phosphating waste slag in a pulverizer and pulverize it into 110-mesh powder, then put the powder in the pretreatment tank, and mix according to the ratio of powder to oxidizing acid of 2.5:1, When mixing, add oxidizing acid to the pretreatment tank, and use a stirring speed of 40r / min for stirring treatment. After the addition of oxidizing acid is completed, continue stirring at a stirring speed for 40min, adjust the temperature to 40°C, Set it aside for 30 minutes, then add water 2.5 times the weight of the powder, and adjust the stirring speed to 110r / min. After stirring continuously for 45 minutes, stop stirring, and filter it to obtain filter residue and filtrate, and transport the filter residue to the building materials factory for production Building materials, the...

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PUM

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Abstract

The invention relates to the technical field of comprehensive utilization of phosphated waste residues and particularly relates to a method for coproducing tricalcium phosphate and ferric oxide by virtue of the phosphated waste residues. According to the method, the phosphated waste residues are preprocessed by virtue of an oxidizing agent, the iron element in the phosphated waste residues can be completely oxidized into trivalent ferric ions, and the phosphated waste residues are alkalized so as to completely remove the iron element, so that the extraction ratio of the phosphated waste residues reaches above 99.13%, meanwhile, the content of the iron element in the phosphated waste residues is reduced, and furthermore, the concentration of phosphate radicals in the phosphated waste residues is increased according to an enrichment principle; a calcium chloride raw material is added into the phosphated waste residues so that the phosphate radicals react with calcium ions in calcium chloride, and the temperature and the pH value are controlled, so that the yield of calcium chloride is increased, the phosphorus element is maximally extracted, and the purity of tricalcium phosphate reaches above 98.1%.

Description

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Claims

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Application Information

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Owner GUIZHOU RES INST OF CHEM IND
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