Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for processing and comprehensive utilization of phosphate rock tailings

A technology of phosphate rock tailings and tailings, applied in the field of processing and comprehensive utilization of phosphate rock tailings, to achieve the effects of environmental protection, reduction of accumulation, and environmental protection

Active Publication Date: 2018-09-07
铜仁市万山区盛和矿业有限责任公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no literature report on the method of using nitric acid and ammonium nitrate to process and comprehensively utilize phosphate rock tailings.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A method for processing and comprehensive utilization of phosphate rock tailings, comprising the following steps:

[0050] A method for processing and comprehensive utilization of phosphate rock tailings, characterized in that it comprises the following steps:

[0051] (1) Calcining the phosphate rock tailings at 1000°C for 1.5h, and then digesting them with hot water at 60°C;

[0052] (2) Adding the tailings that have been digested to a concentration of 30% ammonium nitrate solution and 75% nitric acid solution, stirring and leaching at normal temperature for 60 minutes;

[0053] (3) filtering and washing the slurry after the leaching treatment in step (2) to obtain leaching residue and leaching liquid;

[0054] (4) Stir and leach the leach residue with 20-40% ammonium sulfate solution at a temperature of 70° C. for 90 minutes; filter and wash the leached mixed solution to obtain filter residue and ammonium sulfate leaching solution; filter residue is above 100° C. D...

Embodiment 2

[0063] A method for processing and comprehensive utilization of phosphate rock tailings, comprising the following steps:

[0064] A method for processing and comprehensive utilization of phosphate rock tailings, characterized in that it comprises the following steps:

[0065] (1) Calcining the phosphate rock tailings at 1100°C for 1.0h, and then digesting them with hot water at 70°C;

[0066] (2) Adding the tailings that have been digested to a concentration of 40% ammonium nitrate solution and 65% nitric acid solution, stirring and leaching at normal temperature for 60 minutes;

[0067] (3) filtering and washing the slurry after the leaching treatment in step (2) to obtain leaching residue and leaching liquid;

[0068] (4) Stir and leach the leach residue with 30% ammonium sulfate solution at a temperature of 75° C. for 75 minutes; filter and wash the leached mixed solution to obtain the filter residue and ammonium sulfate leaching solution; dry the filter residue above 100°...

Embodiment 3

[0077] A method for processing and comprehensive utilization of phosphate rock tailings, comprising the following steps:

[0078] A method for processing and comprehensive utilization of phosphate rock tailings, characterized in that it comprises the following steps:

[0079] (1) Calcining the phosphate rock tailings at 1200°C for 0.5h, and then digesting them with hot water at 80°C;

[0080] (2) Adding the tailings that have been digested to a concentration of 50% ammonium nitrate solution and 50% nitric acid solution, stirring and leaching at normal temperature for 90 minutes;

[0081] (3) filtering and washing the slurry after the leaching treatment in step (2) to obtain leaching residue and leaching liquid;

[0082] (4) Stir and leach the leach residue with 20-40% ammonium sulfate solution at a temperature of 80°C for 60 minutes; filter and wash the leached mixed solution to obtain the filter residue and ammonium sulfate leach solution; the filter residue is above 100°C ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a phosphorite tailing processing and comprehensive utilization method. According to the method, after sulfuric acid pretreatment, the generated phosphorite tailing is calcined and digested at first and then subjected to two-step leaching, thus, the magnesium element in the phosphorite tailing is fully separated out; the phosphorite quality is improved, at the same time, the loss of phosphorus pentoxide is avoided effectively; furthermore, the generated waste liquid and waste gas are reclaimed, after the treatment, the solvent can be regenerated and reused; after high quality phosphorite is obtained, the filter residues or filtrate can be used to produce calcium products and magnesium products, the calcium element and magnesium element are effectively recovered and utilized; the discharge of waste gas and waste liquid is avoided, the stacking of tailings is avoided, and the ecological environment is improved.

Description

technical field [0001] The invention relates to the technical field of phosphate rock processing, in particular to a method for processing and comprehensive utilization of phosphate rock tailings. technical background [0002] my country's phosphate rock reserves are huge, but the grade of the mined phosphate rock is low, the mineral particles are fine, closely embedded, and the associated impurities such as magnesium are relatively high. Traditionally, the phosphate rock after mining needs to be pretreated before the next step of product production, so as to reduce the content of impurities such as magnesium in the phosphate rock, thereby achieving the purpose of purifying the phosphate rock, improving the quality of the phosphate rock, and reducing the subsequent The difficulty and energy consumption of using phosphate rock or wet-process phosphoric acid; At present, the beneficiation of phosphate rock in my country mainly adopts flotation, reverse flotation and other metho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/01C01C1/26C05C3/00
Inventor 袁再六
Owner 铜仁市万山区盛和矿业有限责任公司