Plant growing medium produced by using reverse flotation phosphate tailing and preparation method thereof

A technology of planting base material and phosphorus tailings, applied in the direction of phosphate fertilizer, application, fertilizer mixture, etc., can solve the problems of easy loss, preparation of planting base material without phosphorus tailings, etc., and achieve cost saving, low cost and simple construction procedures Effect

Inactive Publication Date: 2014-10-22
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Because phosphorus tailings is a kind of barren tailings, it is easy to lose after being washed by rainwater, and the phosphorus element in it is difficult to decompose and be absorbed by plants under natural conditions. research report

Method used

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  • Plant growing medium produced by using reverse flotation phosphate tailing and preparation method thereof
  • Plant growing medium produced by using reverse flotation phosphate tailing and preparation method thereof
  • Plant growing medium produced by using reverse flotation phosphate tailing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0044] The reverse flotation phosphorus tailings were calcined at 900°C, the XRD diffraction pattern of the calcined product is shown in figure 2 , the main components of reverse flotation phosphorus tailings are dolomite, apatite and quartz minerals in the form of collophanite. After high-temperature calcination, dolomite is decomposed into calcium oxide and magnesium oxide, and the quality of quartz is also improved. mineral activity. The activated phosphorus tailings obtained after calcination are evenly dry-mixed with soil, then wet-mixed with water (see Table 1 for the ratio), aged, and finally sprayed onto rocky slopes to make vegetation substrates.

[0045] For simplicity of description, in the following descriptions, phosphorous tailings refer to reverse flotation phosphorous tailings unless otherwise specified, and active phosphorous tailings refer to calcined reverse flotation phosphorous tailings, and the percentages in the following descriptions are all mass perce...

Embodiment 6～10

[0053] In Examples 6-10, there is a method for preparing vegetation substrates by using reverse flotation phosphate rock tailings, and the distribution ratio of each component is shown in Table 2.

[0054] Table 2

[0055]

[0056] The dry materials described in Table 2 are soil, activated phosphorus tailings, phosphogypsum, phosphorus slag, perlite, fertilizer, silica fume and activator.

[0057] In Examples 6-10, the steps for preparing the planting substrate are as follows:

[0058] (1) Take active phosphorus tailings (calcined at 900°C), soil, silica fume, phosphogypsum, activator, perlite, phosphorus slag, fertilizer and water according to the proportioning of each component in Table 1;

[0059] (2) Dry mix and stir the active phosphorus tailings, silica fume and activator weighed in step (1) evenly (stir for 3 to 5 minutes), then add soil, phosphogypsum, phosphorus slag, perlite and fertilizer and dry mix and stir Evenly (stir for 3-5min), finally add weighed water,...

Embodiment 11～15

[0063] In Examples 11-15, there is a method for preparing vegetation substrates by using a large amount of flotation phosphate rock tailings, and the distribution ratio of each component is shown in Table 3 below.

[0064] table 3

[0065]

[0066] In Examples 11-15, the steps of preparing the above-mentioned planting substrates are the same as those in Examples 6-10.

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Abstract

The invention relates to a plant growing medium produced by using reverse flotation phosphate tailing, which is used on a rock slope and comprises active phosphate tailing, soil and water, wherein active phosphate tailing is calcinined by reverse flotation phosphate tailing, the mass ratio of the active phosphate tailing to soil is 1:3-3:1, water mass accounts for 20-25% of total amount of active phosphate tailing and soil, the active phosphate tailing, soil and water are uniformly stirred and aged, and then are injected on the rock slope to obtain the plant growing medium. According to the invention, calcining is carried out so that phase composition of the reverse flotation phosphate tailing is changed; hydrated silicate composed of magnesium and calcium, which is more difficult than that of apatite, so that P2O5 in hydrated silicate can be directly absorbed by plant. The processed phosphate tailing is mixed with soil to obtain the plant growing medium. The plant growing medium can fully use the phosphate tailing, and has wide application prospect in mine reclamation and local agriculture production.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of tailings, and relates to a vegetable substrate produced by reverse flotation phosphorus tailings and a preparation method thereof. Background technique [0002] Phosphate rock is an important chemical mineral raw material. In order to meet the quality requirements of wet-process phosphoric acid for raw material ores, at present, my country mainly obtains phosphorous concentrate suitable for phosphoric acid production through various beneficiation technologies such as phosphate rock reverse flotation process. Reverse flotation phosphate ore tailings are industrial waste residues left after phosphorus is enriched by reverse flotation process. Its main mineral composition is: dolomite, apatite and quartz minerals in the form of collophosite. Usually every ton of phosphorous concentrate is produced, 0.44 tons of tailings are produced, and about 7 million tons of phosphorous taili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/00C05B13/02C05G3/80
Inventor 曹宏薛俊吴庭罗丽李先福赖小莹张晖何宾宾
Owner WUHAN INSTITUTE OF TECHNOLOGY
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