A system for measuring effective sulfur content in ore

Abstract

The invention discloses a determination system of effective sulfur content in ore, including an infrared furnace, a constant temperature water circulation machine, a SO2 detector, a vacuum pump, a lower single chip microcomputer, an electronic balance, a host computer and a carrier gas bottle, wherein the infrared furnace includes a furnace body, a heating chamber surrounded by two arc-shaped reflectors is arranged in the furnace body, a quartz sample tube and a plurality of infrared heating sources are arranged in the heating chamber, the top and bottom ends of the quartz sample tube extend out of the furnace body respectively, the bottom end of the quartz sample tube is connected with the carrier gas bottle through a gas path system, the carrier gas bottle provides oxygen in the quartz sample tube, a solenoid valve is arranged in the gas path system, the top end of the quartz sample tube is connected with the SO2 detector through a pipeline, the vacuum pump is connected with the SO2 detector through a pipeline, the infrared heating source, the SO2 detector, the vacuum pump, and the solenoid valve are electrically connected to the lower single chip microcomputer respectively, and the lower single chip microcomputer and the electronic balance are electrically connected to the host computer respectively. The measurement accuracy of the determination system of effective sulfur content in ore of the invention is high.

Description

Technical Field

[0001] The invention relates to the technical field of sulfur content measuring equipment, in particular to a system for measuring effective sulfur content in ore. Background Art

[0002] The sulfur content of pyrite and sulfur concentrate is divided into: effective sulfur and total sulfur. Effective sulfur refers to the sulfur that can be precipitated when the pyrite / sulfur concentrate sample is roasted in air at 850°C, that is, the sulfur that can be used in the industrial production of sulfuric acid. It is an important indicator for evaluating the quality of pyrite / sulfur concentrate. There are many methods for determining effective sulfur, including combustion neutralization method, combustion-iodine titration method, weight method, etc. Among them, GB / T2462-1996 "Determination of effective sulfur content in pyrite and sulfur concentrate - combustion neutralization method" has high accuracy and is the most widely used. However, this method has a slow analysis speed, requires the consumption of a variety of chemical reagents, has high requirements for operators, and is greatly interfered by human operation factors. GB / T20123-2006 "Determination of total carbon and sulfur content of steel - Infrared absorption method after combustion in a high-frequency induction furnace" can also be used to test the sulfur content of pyrite / sulfur concentrate. The analysis process is simple, the analysis speed is fast, and the consumption of chemical reagents is small. However, the high-frequency induction furnace uses power to control the temperature. During the test, the temperature of the sample chamber is usually in a floating range, which is more suitable for testing the total sulfur content of the sample. The error for the effective sulfur content test is large. Summary of the invention

[0003] The purpose of the present invention is to provide a system for measuring the effective sulfur content in ore, so as to solve the problems existing in the above-mentioned prior art and improve the accuracy of measuring the effective sulfur content in ore.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The invention provides a system for determining effective sulfur content in ore, comprising an infrared furnace, a constant temperature water circulation machine, a SO2 detector, a vacuum pump, a lower single chip microcomputer, an electronic balance, a host computer and a carrier gas bottle. The infrared furnace comprises a furnace body, a heating chamber surrounded by two arc-shaped reflectors is arranged in the furnace body, a quartz sample tube and a plurality of infrared heat sources are arranged in the heating chamber, the top and bottom ends of the quartz sample tube respectively extend out of the furnace body, the bottom end of the quartz sample tube is connected with the carrier gas bottle through a gas path system, the carrier gas bottle provides oxygen for the quartz sample tube, an electromagnetic valve is arranged in the gas path system, the top end of the quartz sample tube is connected with the SO2 detector through a pipeline, the vacuum pump is connected with the SO2 detector through a pipeline, the infrared heating source, the SO2 detector, the vacuum pump and the electromagnetic valve are respectively electrically connected with the lower single chip microcomputer, the lower single chip microcomputer is electrically connected with the host computer, and the host computer is electrically connected with the electronic balance.

[0006] Preferably, the SO2 detector is electrically connected to the lower single chip computer via an A / D conversion card.

[0007] Preferably, the infrared furnace further comprises a temperature sensor inserted in the heating chamber, and the temperature sensor is electrically connected to the lower single chip computer.

[0008] Preferably, it also includes a constant temperature water circulation machine connected to the cooling water system in the infrared furnace, the constant temperature water circulation machine is used to cool the infrared furnace, the cooling water system is two pipes respectively embedded in the upper and lower metal bodies of the furnace body, and the two ends of the pipes are connected to the constant temperature water circulation machine through hoses.

[0009] Compared with the prior art, the present invention has achieved the following technical effects:

[0010] The measuring system of the effective sulfur content in the ore of the present invention has high measurement accuracy. The infrared furnace in the measuring system of the effective sulfur content in the ore of the present invention is heated by an infrared heat source and cooled by a constant temperature water circulation machine, and the heating and cooling speeds are fast. The accurate temperature can be set by the software system for controlling the furnace temperature in the host computer, and the temperature of the heating chamber in the infrared furnace can be accurately controlled to achieve accurate measurement of sulfur released at different temperatures, thereby improving the accuracy of measuring the effective sulfur content in the ore. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 The schematic diagram of the structure of the system for measuring the effective sulfur content in the ore of the present invention;

[0013] Figure 2 It is a schematic diagram of the structure of an infrared furnace in the system for determining the effective sulfur content in the ore of the present invention;

[0014] Figure 3 It is a structural schematic diagram of the gas path system in the system for determining the effective sulfur content in the ore of the present invention;

[0015] Among them: 1-furnace body; 2-infrared heat source; 3-arc reflector; 4-quartz sample tube; 5-constant temperature water circulation machine; 6-non-dispersive infrared SO2 detector; 7-vacuum pump; 8-A / D conversion card; 9-lower microcontroller; 10-gas path system; 11-upper computer; 12-electronic balance; 13-carrier gas bottle; 14-temperature sensor, 15-first solenoid valve, 16-first reagent tube, 17-second reagent tube, 18-second solenoid valve, 19-flow controller, 20-flow meter, 21-halogen collector, 22-third solenoid valve, 23-water remover, 24-third reagent tube, 25-check valve. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The purpose of the present invention is to provide a system for measuring the effective sulfur content in ore, so as to solve the problems existing in the above-mentioned prior art and improve the accuracy of measuring the effective sulfur content in ore.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 to Figure 2 As shown: This embodiment provides a system for determining the effective sulfur content in ore, including an infrared furnace, a constant temperature water circulation machine 5, a SO2 detector, a vacuum pump 7, a lower single-chip microcomputer 9, an electronic balance 12, a host computer 11 and a carrier gas bottle 13. The infrared furnace includes a furnace body 1, a heating chamber surrounded by two arc-shaped reflectors 3 is provided in the furnace body 1, a quartz sample tube 4 and a plurality of infrared heating sources 2 are provided in the heating chamber, the top and bottom ends of the quartz sample tube 4 extend out of the furnace body 1 respectively, the bottom end of the quartz sample tube 4 is connected to the carrier gas bottle 13 through a gas path system, the carrier gas bottle 13 provides oxygen for the quartz sample tube 4, an electromagnetic valve is provided in the gas path system, the top end of the quartz sample tube 4 is connected to the SO2 detector through a pipeline, the vacuum pump 7 is connected to the SO2 detector through a pipeline, the infrared heating source, the SO2 detector, the vacuum pump 7, and the electromagnetic valve are electrically connected to the lower single-chip microcomputer 9 respectively, the lower single-chip microcomputer 9 is electrically connected to the host computer 11, and the host computer 11 is electrically connected to the electronic balance 12.

[0020] In this embodiment, the SO2 detector is electrically connected to the lower single chip computer 9 through the A / D conversion card 8. The infrared furnace also includes a temperature sensor 14 inserted in the heating chamber, and the temperature sensor 14 is electrically connected to the lower single chip computer 9. The cooling water system in the infrared furnace is connected to the constant temperature water circulation machine 5, and the constant temperature water circulation machine 5 is used to cool the infrared furnace. The cooling water system is two pipes respectively embedded in the upper and lower metal bodies of the furnace body 1, and the two ends of the pipe are connected to the constant temperature water circulation machine 5 through hoses.

[0021] The arc reflector 3 is close to the inner wall of the infrared furnace body 1, and two round rod-shaped infrared heat sources 2 are fixed on the edge of the heating cavity formed by the arc reflector 3. The infrared light emitted by the infrared heat source 2 is reflected multiple times by the arc reflector 3 and focused on the sample position in the quartz sample tube 4, so that the sample is at a high temperature and reacts with the oxygen sent into the quartz sample tube 4 by the carrier gas bottle 13 and melts, releasing sulfur dioxide gas, which is sent into the non-dispersive infrared SO2 detector 6 through the pipeline. At this time, the non-dispersive infrared SO2 detector 6 outputs a level signal, which will be sent into the non-dispersive infrared SO2 detector The signal level output by the non-dispersive infrared SO2 detector 6 is connected to the A / D conversion card 8 through a cable for A / D conversion, and then collected by the lower single-chip microcomputer 9 and transmitted to the dedicated sulfur analyzer operating software of the upper computer 11. The software plots the level signal output by the non-dispersive infrared SO2 detector 6 in real time to obtain the sulfur release curve. The upper computer 11 software then integrates the release peak surrounded by the release curve to obtain the peak area, and combines the weight of the sample weighed by the electronic balance 12 to calculate the percentage of sulfur in the sample.

[0022] In order to better realize the quantitative analysis of sulfur in different forms in the sample, the heating temperature of the sample must be accurately controlled. The heating process of the infrared heat source 2 needs to be controlled by the lower single-chip microcomputer 9; the lower single-chip microcomputer 9 also collects the temperature signal measured by the component temperature sensor 14 and transmits it to the upper computer 11 software; at the same time, the upper computer 11 feeds back to the lower single-chip microcomputer 9, and the lower single-chip microcomputer 9 adjusts the power of the infrared heat source 2, so as to achieve the purpose of accurate temperature control. The gas path system is connected to the lower single-chip microcomputer 9, and the lower single-chip microcomputer 9 controls the various working states of the carrier gas and the analysis gas. After the analysis gas passes through the non-dispersive infrared SO2 detector 6, it is pumped out by the vacuum pump 7.

[0023] The structural diagram of the gas system is as follows: Figure 3As shown: the oxygen in the carrier gas bottle 13 passes through the first solenoid valve 15 and then passes through the first reagent tube 16 filled with alkali asbestos. The alkali asbestos in the first reagent tube 16 absorbs the impurity CO2 in the oxygen, and then enters the second reagent tube 17 filled with magnesium perchlorate to absorb the impurity water in the oxygen. Then, after the voltage and flow are stabilized by the flow controller 19 and the flow meter 20, it enters the quartz sample tube 4 as a carrier gas in two ways. At this time, the weighed sample is sent into the quartz sample tube 4, and the sample is heated and melted in an oxygen environment. The released SO2 gas is evacuated by a vacuum pump and enters the halogen collector 21 through the other end of the quartz sample tube 4 to remove the possible halogen elements, and then enters The dehydrator 23 removes the crystal water and moisture that may be present in the sample, and then enters the non-dispersive infrared SO2 detector through the third reagent tube 24 filled with magnesium perchlorate, and then enters the vacuum pump 7 through a steady flow and is emptied. The non-dispersive infrared SO2 detector synchronously transmits the output electrical signal of the SO2 detector to the A / D conversion card 8, which is then collected and recorded by the host computer 11, and the SO2 content value (%) is calculated. At the end of each analysis, the second solenoid valve 18 is closed and the third solenoid valve 22 is opened. Oxygen enters the non-dispersive infrared SO2 detector through the third reagent tube 24 filled with magnesium perchlorate, and then enters the vacuum pump 7 through a steady flow and a one-way valve 25, and is emptied to purge the gas path.

[0024] This embodiment provides a system for determining the effective sulfur content in an ore, and the use process is as follows:

[0025] The sample is placed in a porcelain boat and the net weight of the sample is weighed. Then, an appropriate amount of flux is applied to the surface of the sample. The porcelain boat is placed at the mouth of the quartz sample tube. Then, the porcelain boat hook is used to push the sample into the quartz combustion tube in the sample gas (SO2) extraction chamber. The combustion tube is placed in an infrared heating furnace. The heating temperature is controlled by a program. The software analysis is started. The single-chip microcomputer controls the gas circuit operation. The carrier gas (O2) is sent into the combustion tube to ensure sufficient oxygen supply and combustion. The sulfur in the sample will react with O2 to produce SO2, which is sent to the infrared detector by the carrier gas to measure the SO2 content, thereby obtaining the sulfur content. At the same time, according to the characteristics of the sample material, different temperatures can be set to measure the sulfur content in different forms. It only takes about 30 seconds from sample injection to obtaining accurate test results.

[0026] The data of the effective sulfur test using the determination system of the effective sulfur content in the ore of this embodiment are as follows:

[0027] As shown in Table 1:

[0028]

[0029]

[0030]

[0031] Table 1: Data of effective sulfur test using the determination system of effective sulfur content in ore. Data of effective sulfur determination using the combustion neutralization method are shown in Table 2:

[0032]

[0033]

[0034]

[0035] Table 2 Data of effective sulfur determination using combustion neutralization method

[0036] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as “top”, “bottom”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A system for measuring effective sulfur content in ore, characterized in that: It includes an infrared furnace, a constant temperature water circulation machine, a SO2 detector, a vacuum pump, a lower single chip microcomputer, an electronic balance, a host computer and a carrier gas bottle. The infrared furnace includes a furnace body, a heating chamber surrounded by two arc-shaped reflectors is arranged in the furnace body, a quartz sample tube and a plurality of infrared heat sources are arranged in the heating chamber, the top and bottom ends of the quartz sample tube extend out of the furnace body respectively, the bottom end of the quartz sample tube is connected with the carrier gas bottle through a gas path system, the carrier gas bottle provides oxygen for the quartz sample tube, an electromagnetic valve is arranged in the gas path system, the top end of the quartz sample tube is connected with the SO2 detector through a pipeline, the vacuum pump is connected with the SO2 detector through a pipeline, the infrared heat source, the SO2 detector, the vacuum pump and the electromagnetic valve are electrically connected with the lower single chip microcomputer respectively, the lower single chip microcomputer is electrically connected with the host computer, and the host computer is electrically connected with the electronic balance; The gas path system includes a first solenoid valve, a first reagent tube and a second reagent tube. The oxygen in the carrier gas bottle passes through the first solenoid valve and then passes through the first reagent tube filled with alkali asbestos. The alkali asbestos in the first reagent tube absorbs the impurity CO2 in the oxygen, and then enters the second reagent tube filled with magnesium perchlorate to absorb the impurity moisture in the oxygen. After passing through the voltage and flow stabilization of the flow controller and the flow meter, the oxygen enters the quartz sample tube as a carrier gas in two ways.

2. The system for measuring effective sulfur content in ore according to claim 1, characterized in that: The SO2 detector is electrically connected to the lower single chip computer through an A / D conversion card.

3. The system for measuring effective sulfur content in ore according to claim 1, characterized in that: The infrared furnace further comprises a temperature sensor inserted in the heating cavity, and the temperature sensor is electrically connected to the lower single chip computer.

4. The system for measuring effective sulfur content in ore according to claim 1, characterized in that: It also includes a constant temperature water circulation machine connected to the cooling water system in the infrared furnace, the constant temperature water circulation machine is used to cool the infrared furnace, the cooling water system is two pipes respectively embedded in the upper and lower metal bodies of the furnace body, and the two ends of the pipes are connected to the constant temperature water circulation machine through hoses.

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