Sulphide ore calefactive oxidation experimental device

An experimental device and technology of sulfide ore, applied in the field of underground mining of metal mines, can solve the problems that cannot reflect the dynamic oxidation heat release process of sulfide ore and the modes of various compound chemical reactions, and achieve the effect of short time

Inactive Publication Date: 2017-06-13
JIANGXI UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although the standard heat of reaction of pure sulfide minerals can be calculated according to chemical thermodynamics, and the heat of combustion of impure minerals can also be measured by thermal engineering calorimeters, these measurements cannot reflect the dynamic oxidation of sulfide ores under different temperature conditions Models of exothermic processes and multiple complex chemical reactions

Method used

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  • Sulphide ore calefactive oxidation experimental device
  • Sulphide ore calefactive oxidation experimental device
  • Sulphide ore calefactive oxidation experimental device

Examples

Experimental program
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Embodiment 1

[0028] see Figure 1-Figure 6 , in the embodiment of the present invention, a sulfide ore heating oxidation experimental device is independently designed according to the experiment, and is composed of a constant temperature box 1, a temperature probe 2, a sulfur dioxide transmitter 4 and a paperless recorder 3.

[0029] The function of the constant temperature box 1 is to provide a medium-high temperature environment for the sulfide ore oxidation experiment, so as to accelerate the oxidation reaction of the ore, shorten the experimental period, and avoid the adverse effects caused by the long period of normal oxidation of the sulfide ore on the mine site; The hole penetrates the insulation layer to the working room inside the box so that the temperature probe 2 can go deep into it. The temperature probe 2 is a contact probe that measures the temperature by touching the object. There are four temperature probes 2 in this experiment, two of which are Measure the internal temper...

specific Embodiment

[0047] Specific embodiments are described as follows.

[0048] 1 Experimental scheme design

[0049] Experiments study when the ore pile reacts, specifically when it self-heats, when sulfur dioxide is produced, and the corresponding temperature. Because the experiments are different, the experimental designs are also quite different.

[0050] The simulation experiment of sulfide ore piles focuses on the self-heating, gas products and temperature changes of the ore piles, and the experimental samples come from the raw ore of the mine, so they can be grouped according to the actual sulfur content distribution of the mine. Since the sulfur content of mine sulfide ore is roughly distributed within 0-30%, and it is disorderly, it can only be classified according to the range, which is 0-10%, 10-20%, 20-30%. The simulation experiment is divided into three groups, and the experimental design is shown in Table 1.

[0051] Table 1 Simulation experiment of sulfide ore

[0052] ...

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Abstract

The invention discloses a sulphide ore calefactive oxidation experimental device which is composed of a calorstat, a temperature probe, a sulfur dioxide transmitter and a paperless recording instrument. A hole is perforated perpendicularly in a shell of a top cover of the calorstat and penetrates through a thermal insulation layer to enter a working chamber inside a calorstat body. The temperature probe is arranged through the hole, is connected with the paperless recording instrument, and is used for continuously monitoring a temperature of the working chamber of the calorstat and temperatures on the surface and inside a sulphide ore pile. A gas vent is formed in the top of the calorstat, and a metal pipeline is fixed at the gas vent of the calorstat. The sulfur dioxide transmitter is arranged at an outlet of the metal pipeline and is connected with the paperless recording instrument through a two-core shielded wire, and a concentration of sulfur dioxide released due to calefactive oxidation of sulphide ore is continuously monitored. By adoption of the sulphide ore calefactive oxidation experimental device, the whole process of oxidation, self-heating and spontaneous combustion of the sulphide ore pile can be researched, a reactive state can be analyzed according to temperature changes and the concentration of the generated sulfur dioxide, and meanwhile, influences of multiple factors and multiple levels can be considered to simulate influences of various environment factors on a mine site.

Description

technical field [0001] The invention relates to the technical field of underground mining of metal mines, in particular to an experimental device for heating and oxidizing sulfide ores. Background technique [0002] Accurate determination of the spontaneous combustion tendency of sulfide ores can provide a basis for mining design of ore deposits, so as to correctly select mining methods, ventilation systems, mining sequences and take fire prevention measures, so as to avoid blind design, save investment and ensure safety. The spontaneous combustion tendency of ore refers to the comprehensive spontaneous combustion tendency of all minerals in the ore, rather than the spontaneous combustion tendency of a single mineral. The main characteristics related to spontaneous combustion tendency in ore are material composition of ore, structural characteristics of each component, oxidation rate, self-heating characteristics, ignition temperature, etc. Among them, the index of dynamic o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/22
CPCG01N25/22
Inventor 饶运章吴兵吴卫强王丹
Owner JIANGXI UNIV OF SCI & TECH
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