Heaping Technology and Application of Fine Particle Industrial Solid Waste

A solid waste and fine particle technology, applied in the field of high-efficiency bioheap leaching technology, can solve the problems of restricting the development and popularization of heap leaching technology, lack of research, backwardness, etc. Effect of oxygen mass transfer coefficient

Active Publication Date: 2018-03-16
CENT SOUTH UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the heap leaching technology in my country, the research on heap leaching technology, the establishment of efficient heap leaching system and how to improve the permeability of the heap leaching system is extremely scarce, especially in fine-grained industrial solid wastes such as fine-grained tailings and waste ores. Heaping technology has lagged far behind the practical application requirements, which to some extent limits the further development and application of heap leaching technology in my country

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heaping Technology and Application of Fine Particle Industrial Solid Waste
  • Heaping Technology and Application of Fine Particle Industrial Solid Waste
  • Heaping Technology and Application of Fine Particle Industrial Solid Waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Heap leaching of low-grade sulfide ore in Yulong, Tibet

[0044] The low-grade sulfide ore used in this example comes from the Yulong Copper Mine in Tibet, and the particle size of most of the ore is less than 10mm.

[0045] The low-grade sulfide ore of this embodiment is processed by using the heaping process of fine particle industrial solid waste of the present invention, which specifically includes the following steps:

[0046] (1) Screen the low-grade sulfide ore in this embodiment into 8 particle sizes, specifically including: 10-8mm, 8-5mm, 5-2.5mm, 2.5-0.8mm, 0.8-0.38mm, 0.38-0.18mm, 0.18 ~ 0.15mm and less than 0.15mm; the particle size of low-grade sulfide ore after screening is less than 10mm.

[0047] (2) Grading and mixing the graded low-grade sulfide ores with different particle sizes according to the set coefficient of inhomogeneity and curvature, and then aging to obtain a graded dispersion. Among them, the inhomogeneity coefficient Cu of the...

Embodiment 2

[0056] Example 2: Heap leaching of low-grade arsenic-containing refractory gold ores

[0057]The low-grade arsenic-containing refractory gold ore used in this example comes from the flotation tailings and waste ore of a certain gold mine in Liaoning.

[0058] The low-grade arsenic-containing refractory gold ore of this embodiment is treated by using the heaping process of fine particle industrial solid waste of the present invention, which specifically includes the following steps:

[0059] (1) The low-grade arsenic-containing refractory gold ore in this embodiment is screened into 8 particle sizes, specifically including: 10-8mm, 8-5mm, 5-2.5mm, 2.5-0.8mm, 0.8-0.38mm, 0.38mm ~0.18mm, 0.18~0.15mm and less than 0.15mm; the particle size of low-grade arsenic-containing refractory gold ore after screening is all less than 10mm.

[0060] (2) The graded low-grade arsenic-containing refractory gold ores with different particle sizes are graded and mixed according to the set coeffic...

Embodiment 3

[0068] Example 3: Heap leaching of low-grade copper sulfide ore in Dexing, Jiangxi

[0069] The low-grade sulfide ore used in this example comes from Jiangxi Dexing Copper Mine.

[0070] The low-grade sulfide ore of this embodiment is processed by using the heaping process of fine particle industrial solid waste of the present invention, which specifically includes the following steps:

[0071] or 10~7mm, 7~4mm, 4~2mm, 2~1mm, 1~0.25mm and less than 0.25mm. The particle size of the screened low-grade sulfide ore is less than 10mm.

[0072] (2) Grading and mixing the graded low-grade sulfide ores with different particle sizes according to the set coefficient of inhomogeneity and curvature, and then aging to obtain a graded dispersion. Corresponding to the first particle size, the unevenness coefficient Cu of the graded dispersion III is 25, and the curvature coefficient Cc is 3.1; the unevenness coefficient Cu of the graded dispersion IV is 16, and the curvature coefficient 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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

A heap construction process for fine particle industrial solid waste comprises the following steps that the fine particle industrial solid waste is screened into a plurality of granularity grades; the graded fine particle industrial solid waste is subjected to grading and blending according to the set nonuniformity coefficient and curvature coefficient, then curing is conducted, and a graded discrete body is obtained; and the graded discrete body is subjected to thin-layer heap construction. The application mode of the heap construction process in heap bioleaching comprises the steps that after a bottommost layer and an impermeable layer are laid, a layer of coarse sand is laid as a bottom layer; ore with the grain size of 10-15 mm and ore with the grain size of 5-10 mm serve as a first-grade buffering layer and a second-grade buffering layer on the bottom layer, and then heap construction is conducted through the heap construction process; pre-spraying is conducted through a dilute sulphuric acid solution after a heap is constructed; and microorganisms are introduced when the pH of the spraying percolate is stabilized to be 1-2, and bioleaching begins to be conducted. The heap construction process for fine particle industrial solid waste can remarkably improve the permeability of a heap leaching system, ensure uniform seepage and facilitate microbial growth.

Description

technical field [0001] The invention belongs to the field of microbial hydrometallurgy, in particular to a high-efficiency bioheap leaching process for fine-grained industrial solid waste. Background technique [0002] Mineral resources are an important material basis for the development of human society and the construction of the national economy. The rapid economic growth is closely related to the massive consumption of mineral resources. At present, more than 70% of agricultural production raw materials, more than 80% of industrial raw materials and more than 90% of energy in China come from mineral resources. However, my country's mineral resources are of extremely low grade, associated or symbiotic with many ores, complex and difficult to handle, and most of them are small and medium-sized mines. Traditional mineral processing and metallurgical processes cannot effectively process these mineral resources, resulting in low resource availability, long production processe...

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): C22B3/18C22B7/00
CPCY02P10/20
Inventor 周洪波王玉光李凯仉丽娟周文博康鑫史美玉
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products