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A method for dissolving medium and low-grade phosphate rocks by using microbial flora in phosphate rock pit water

A technology of microbial flora and mine water, applied in the field of phosphate rock mining and processing, can solve the problems of rare utilization of low-grade phosphate rock and single, and achieve the effects of low requirements for cultivation conditions, simple process and simplified process

Inactive Publication Date: 2017-07-11
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although some good progress has been made in the research on microbial dissolution of low-grade phosphate rock, there are still some shortcomings, that is, most of the current research uses a single or several strains of known components, and few use natural Research on the dissolution of medium and low-grade phosphate rock by microbial flora with unknown components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for dissolving medium and low-grade phosphate rocks by utilizing microbial flora in phosphate rock pit water, comprising the steps of:

[0022] 1) Enrichment culture of microbial flora in phosphate rock pit water: put phosphorus-containing medium and phosphate rock pit water in a volume ratio of 1:0.8 into a container (such as a triangular flask), and place the container in a constant temperature shaker at 22°C Vibrating at a rotational speed of 140 rpm for 4 days, the phosphate rock mine water microbial flora enrichment culture solution A of the first enrichment culture was obtained.

[0023] Put the phosphorus-containing medium and the phosphate mine water microbial flora enrichment culture solution A of the first enrichment culture into a container at a volume ratio of 1:0.7, and place the container in a constant temperature shaker at 30°C at 100 rpm Shake culture at a rotation speed of 5 minutes for 5 days to obtain the phosphate mine pit water microbial fl...

Embodiment 2

[0029] A method for dissolving medium and low-grade phosphate rocks by utilizing microbial flora in phosphate rock pit water, comprising the steps of:

[0030] 1) Enrichment culture of microbial flora in phosphate rock pit water: put phosphorus-containing medium and phosphate rock pit water in a volume ratio of 1:0.7 into a container (such as a triangular flask), and place the container in a constant temperature shaker at 25°C Vibrating culture at a rotational speed of 120 rpm for 4 days to obtain the phosphate mine pit water microbial flora enrichment culture solution A for the first enrichment culture.

[0031] Put the phosphorus-containing medium and the phosphate mine water microbial flora enrichment culture solution A of the first enrichment culture into a container at a volume ratio of 1:0.7, and place the container in a constant temperature shaker at 25°C at 120 rpm. Shaking culture at a rotational speed of 10 minutes for 4 days to obtain the phosphate mine pit water mi...

Embodiment 3

[0037] A method for dissolving medium and low-grade phosphate rocks by utilizing microbial flora in phosphate rock pit water, comprising the steps of:

[0038] 1) Enrichment culture of microbial flora in phosphate rock pit water: put phosphorus-containing medium and phosphate rock pit water in a volume ratio of 1:0.5 into a container (such as a triangular flask), and place the container in a constant temperature shaker at 25°C Vibrate culture at a rotational speed of 160 rpm for 3 days to obtain the phosphate mine pit water microbial flora enrichment culture solution A for the first enrichment culture.

[0039] Put the phosphorus-containing medium and the phosphate mine water microbial flora enrichment culture solution A of the first enrichment culture into a container at a volume ratio of 1:0.6, and place the container in a constant temperature shaker at 30°C at 120 rpm. Shake culture at a rotation speed of 5 minutes for 5 days to obtain the phosphate mine pit water microbial...

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Abstract

The invention relates to a method for dissolving low- and medium-grade phosphorite by using phosphorite pit water microbial flora. The method comprises the following steps: (1) enrichment cultivation of phosphorite pit water microbial flora: performing enrichment cultivation on the phosphorite pit water microbial flora to obtain a phosphorite pit water microbial flora enrichment culture solution; (2) dissolving of the low- and medium-grade phosphorite by using the phosphorite pit water microbial flora: adding a non-phosphorus culture medium and the low- and medium-grade phosphorite into a container, and then adding the phosphorite pit water microbial flora enrichment culture solution for cultivation. The method is simple technologically, low in requirement on cultivation condition and environment-friendly; the low- and medium-grade phosphorite solubilization efficiency is over 60 percent. The microbial flora is from phosphorite pit water, and is high in phosphorite environment adaptability, so that microbial acclimation cultivation is not needed.

Description

technical field [0001] The invention relates to the technical field of phosphate rock mining and processing, in particular to a method for dissolving medium and low-grade phosphate rock by utilizing microbial flora in pit water of phosphate rock. Background technique [0002] my country is a country rich in phosphate rock resources, but most of them are medium and low-grade phosphate rock. Among the proven reserves of phosphate rock in my country, the average grade of phosphate rock is about 17%, and the rich ore with an ore grade greater than 30% does not exceed 10% of the total reserves. The middle and low-grade phosphate rock with an ore grade of less than 30% has fine particle size, complex mineral composition and high impurity content. These factors determine that the production cost is high and the economic benefit is low when the traditional wet or thermal phosphate fertilizer production process is used to process these low-grade phosphate rocks. [0003] At present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20C12R1/01C12P3/00C01B25/01
CPCC01B25/01
Inventor 肖春桥池汝安张华香张越非余军霞徐志高周芳徐源来
Owner WUHAN INSTITUTE OF TECHNOLOGY
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