A method for monitoring open circuit of waste acid in copper smelting off-gas acid production and a furnace burden collecting system

Abstract

The present application relates to the technical field of flue gas acid making, in particular to a copper smelting flue gas acid making waste acid open circuit monitoring method and a furnace charge collecting system, comprising the following steps: S1, obtaining impurity components in copper concentrate through the furnace charge collecting system; S2, calculating the amount of each impurity entering the purification system according to the collected data; S3, collecting the amount of each impurity in the actual production waste acid after acid making; S4, adjusting the purification water supplement amount and the waste acid open circuit amount according to the actual collected amount of each impurity and the control interval of each type of impurity in the waste acid; S5, comparing and analyzing the actual collected amount of impurities with the calculated amount; S6, adjusting the front-end production control situation or adjusting the furnace charge ratio according to the analysis result; the present application calculates the amount of impurities in the flue gas entering the purification system by collecting the proportion of each element in the copper concentrate entering the furnace, adjusts the purification water supplement amount and the waste acid open circuit amount according to the control interval of each type of impurity in the waste acid, so that each type of impurity in the waste acid is within the design controllable range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas acid making, in particular to a copper smelting flue gas acid making waste acid open monitoring method and a furnace charge collection system. BACKGROUND

[0002] SO2 flue gas generated in the copper smelting process contains impurities such as copper, iron, arsenic, fluorine, etc., and the temperature is 280-320℃. After the flue gas is washed and cooled through the acid making purification process, it is sent to the acid making dry absorption and conversion to produce sulfuric acid products. In order to ensure the washing efficiency, material balance and water balance, a certain amount of waste acid needs to be discharged. The waste acid generally contains 60-120g / L of sulfuric acid, 0.5-5g / L of copper, 0.5-5g / L of iron, 0.5-10g / L of arsenic and 0.5-5g / L of fluorine.

[0003] At present, the fixed waste acid open amount is used in most smelting flue gas acid making purification systems, and the sulfurization + lime neutralization method is used to treat the waste acid. However, the high content of sulfuric acid and arsenic in the waste acid is not conducive to the treatment of the rear end, so the fixed waste acid open amount is not conducive to the control index and the adjustment of production. SUMMARY

[0004] The purpose of the present application is to solve the above problems, and to provide a copper smelting flue gas acid making waste acid open monitoring method and a furnace charge collection system.

[0005] In order to solve the above technical problems, the present application adopts the following technical solutions:

[0006] A copper smelting flue gas acid making waste acid open monitoring method, comprising the following steps:

[0007] S1, obtaining the impurity components in the copper concentrate through the furnace charge collection system, and determining the furnace charge ratio according to the amount of input;

[0008] S2, calculating the amount of each impurity entering the purification system according to the collected data, calculating the impurity concentration in the purified dilute acid under the proposed condition through the proposed system water supplement amount, and determining the waste acid open amount under the calculation according to the risk of exceeding the standard of each impurity according to the concentration of each impurity;

[0009] S3, collecting the amount of each impurity in the actual production waste acid after acid making;

[0010] S4, adjusting the purification water supplement amount and the waste acid open amount according to the amount of each impurity actually collected and the control range of each type of impurity in the waste acid, so that each type of impurity in the waste acid is within the design control range;

[0011] S5, comparing and analyzing the amount of impurities in the actual collection with the calculated amount;

[0012] S6, adjusting the front-end production control or adjusting the furnace charge ratio according to the analysis result.

[0013] Further, the S1 specifically includes:

[0014] S11, divide the copper concentrate to be fed into several parts, and record the weight of each part of the copper concentrate;

[0015] S12, detect each part of the copper concentrate by a fluorescence detector, calculate the mass fraction of each impurity in the copper concentrate, and obtain the mass of each impurity in the copper concentrate;

[0016] S13, put the detected copper concentrate into the furnace, and calculate the total amount of each impurity.

[0017] Further, the S11 further includes:

[0018] S101, calculate the maximum mass of each impurity according to the maximum acid storage capacity of the system and the maximum concentration of each impurity allowed by the system;

[0019] S102, calculate the maximum mass fraction of each impurity according to the maximum mass of each impurity and the feeding amount.

[0020] Further, the S13 specifically further includes:

[0021] S131, add the mass of each impurity measured in the current copper concentrate to the total mass of each impurity of the copper concentrate previously fed, and calculate the mass fraction of each impurity after adding the copper concentrate;

[0022] S132, compare the result calculated in S131 with the maximum mass fraction of each impurity in S102 to determine whether the current mass fraction of each impurity is over standard;

[0023] If at least one of them is over standard, move the copper concentrate to the temporary area;

[0024] If it is not over standard, first feed it into the furnace, then traverse the copper concentrate in the temporary area, add the amount of each impurity again and determine whether it is over standard, and so on.

[0025] A furnace charge collection system for the above method, comprising:

[0026] A conveyor belt for conveying a bracket on which the weighed copper concentrate is placed;

[0027] An X-ray fluorescence analyzer arranged on the conveyor belt for detecting the amount of each impurity in each part of the copper concentrate;

[0028] A conveying assembly arranged on the rear side of the conveying direction of the conveyor belt, the top of the conveying assembly being provided with a fixing frame, the conveying assembly being slidably connected with the fixing frame, for conveying the detected copper concentrate.

[0029] Further, the conveying assembly is provided with an inlet on the side away from the conveying belt, and a recovery area is arranged on one side of the inlet, and a temporary area is arranged on the top of the recovery area.

[0030] Further, the conveying assembly comprises a moving beam slidingly arranged with the fixing frame, and electric telescopic rods are arranged at the two ends of the moving beam, and a clamping assembly for clamping the bracket is arranged at the movable end of the electric telescopic rod.

[0031] Further, a lead screw is arranged in the fixing frame in a rotating manner, and a first sliding block sleeved on the lead screw is arranged on the top of the moving beam.

[0032] Further, a bidirectional threaded rod is arranged in the moving beam in a rotating manner, and a second sliding block sleeved on the bidirectional threaded rod is arranged at the top end of the electric telescopic rod.

[0033] Further, the clamping assembly comprises a connecting rod connected with the electric telescopic rod, a clamping plate is arranged at the end of the connecting rod away from the electric telescopic rod, a cross-shaped inserting rod is arranged on one side of the clamping plate in a rotating manner, and support rods are fixedly arranged at the two ends of the bracket, and cross-shaped grooves matched with the cross-shaped inserting rod are arranged on the support rods.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] 1. The present application collects the proportions of copper, iron, sulfur and other elements in the copper concentrate into the furnace, analyzes and calculates the amounts of sulfur dioxide, sulfur trioxide, copper, arsenic and other substances in the flue gas entering the purification system, adjusts the purification water supply and the amount of open road of the contaminated acid according to the control interval of various impurities in the contaminated acid, so that various impurities in the contaminated acid are within the controllable range in design, and the treatment load of subsequent processes is avoided due to the exceeding of the control interval of the pollutants.

[0036] 2. The collected data are compared and analyzed to determine the front-end production control situation, the furnace charge ratio is reasonably adjusted, and appropriate temperature, pressure, copper matte ratio, oxygen-sulfur ratio and other parameters are controlled, so as to facilitate the production of the flue gas acid purification process and the subsequent process. BRIEF DESCRIPTION OF DRAWINGS

[0037] The drawings accompanying the specification of this application serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0038] Figure 1 is a system block diagram of the present application for monitoring the open road of the contaminated acid;

[0039] Figure 2 is a system block diagram of the present application for detecting the amounts of various impurities in the inlet material;

[0040] Figure 3is the system block diagram of the application for judging whether the amount of each impurity in copper concentrate exceeds the standard;

[0041] Figure 4 is the overall structure schematic diagram of the furnace charge collection system of the application;

[0042] Figure 5 is the connection schematic diagram of the conveying assembly and the fixing frame in the furnace charge collection system of the application;

[0043] Figure 6 is the structure schematic diagram of the conveying assembly in the furnace charge collection system of the application;

[0044] Figure 7 is the structure schematic diagram of the clamping assembly in the furnace charge collection system of the application.

[0045] In the figure: 1, conveying belt; 2, bracket; 21, support rod; 22, cross slot; 3, X fluorescence analyzer; 4, fixing frame; 41, lead screw; 5, conveying assembly; 50, first sliding block; 51, moving cross beam; 511, bidirectional threaded rod; 52, electric telescopic rod; 521, second sliding block; 53, clamping assembly; 531, connecting rod; 532, clamping plate; 533, cross insertion rod; 6, inlet; 7, recovery area; 8, temporary area. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. In the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0047] It should be noted that if the embodiments of the application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0048] Referring to Figures 1-3 A copper smelting flue gas acid making waste acid open circuit monitoring method, comprising the following steps:

[0049] S1, obtaining the impurity components in the copper concentrate through the furnace charge collection system, and determining the furnace charge ratio according to the amount of input;

[0050] S2, according to the collected data, the amount of each impurity entering the purification system is calculated, through the prepared system water supply amount, the impurity concentration in the prepared purification dilute acid is calculated, and according to the impurity concentration, which type of pollutant is closest to the risk of exceeding the standard is analyzed, and the optimal waste acid opening amount guidance opinion is provided;

[0051] S3, after acid production, the amount of each impurity in the actual production waste acid is collected, including the amount of sulfur dioxide, sulfur trioxide, copper, arsenic and other substances contained in the flue gas entering the purification system;

[0052] S4, according to the actual amount of each impurity collected and the control interval of each type of impurity in waste acid, the purification water supply amount and waste acid opening amount are adjusted, so that each type of impurity in waste acid is within the design control range;

[0053] S5, the actual amount of impurities collected is compared and analyzed with the calculated amount;

[0054] S6, according to the analysis result, the front-end production control situation is judged, the furnace charge ratio is reasonably adjusted, the appropriate temperature, pressure, copper matte ratio, oxygen-sulfur ratio and other parameters are controlled, so as to facilitate the regulation and control of waste acid opening and subsequent process production in the flue gas acid production and purification process.

[0055] In an embodiment, S1 specifically includes:

[0056] S11, the copper concentrate to be fed is divided into several parts, since the amount of each detection is limited, the copper concentrate needs to be divided and weighed, and the mass of each part of the copper concentrate is recorded;

[0057] S12, each part of the copper concentrate is detected by a fluorescence detector, the mass fraction of each impurity in the copper concentrate is calculated, and the mass of each impurity in the copper concentrate is obtained;

[0058] S13, the detected copper concentrate is fed into the furnace, and the total amount of each impurity is calculated, mainly to determine the total amount of impurities entering the purification system, and to monitor the movement of these impurities throughout the process.

[0059] In an embodiment, S11 further includes:

[0060] S101, according to the maximum acid storage capacity of the system and the maximum concentration of each impurity allowed by the system, the maximum mass of each impurity is calculated;

[0061] S102, according to the maximum mass of each impurity and the feeding amount, the maximum mass fraction of each impurity is calculated;

[0062] Mainly to control the amount of impurities entering the system, and try to keep the amount within the system allowed range.

[0063] In an embodiment, S13 specifically further includes:

[0064] S131, adding the mass of each impurity measured in the current copper concentrate to the total mass of each impurity in the copper concentrate previously fed, and calculating the mass fraction of each impurity after adding the copper concentrate;

[0065] S132, comparing the result calculated in S131 with the maximum mass fraction of each impurity in S102 to determine whether the mass fraction of each impurity in the current copper concentrate exceeds the standard;

[0066] If at least one of them exceeds the standard, the copper concentrate is moved to the temporary suspension area;

[0067] If it does not exceed the standard, it is first fed into the furnace, then the copper concentrate in the temporary suspension area is traversed, the amount of each impurity is added again and it is determined whether it exceeds the standard. If it still exceeds the standard, these copper concentrates are still placed in the temporary suspension area. When it is found that after adding it does not exceed the standard, the copper concentrate can be fed into the furnace, and then traversed again until none of them is qualified, and then the next copper concentrate is measured.

[0068] Referring to Figures 4-7 A furnace charge collecting system for the above method, comprising:

[0069] A conveyor belt 1 for conveying a bracket 2 on which the weighed copper concentrate is placed;

[0070] An X-ray fluorescence analyzer 3 arranged on the conveyor belt 1 for detecting the amount of each impurity in each copper concentrate;

[0071] A conveying assembly 5 arranged on the back side of the conveying direction of the conveyor belt 1, the top of the conveying assembly 5 is provided with a fixing frame 4, the conveying assembly 5 and the fixing frame 4 are slidably connected, for conveying the detected copper concentrate;

[0072] When each copper concentrate is conveyed backward along the conveyor belt 1, the copper concentrate is detected and analyzed by the X-ray fluorescence analyzer 3 to determine the amount of each impurity, and then the detected copper concentrate can be conveyed backward by the conveying assembly 5 to determine whether it is fed into the furnace.

[0073] In an embodiment, the side of the conveying assembly 5 away from the conveyor belt 1 is provided with a feeding port 6, one side of the feeding port 6 is provided with a recovery area 7, and the top of the recovery area 7 is provided with a temporary suspension area 8;

[0074] After determining that the amount of impurities does not exceed the standard, the copper concentrate can be fed from the feeding port 6, and the bracket 2 can be placed in the recovery area 7. If the impurities in the copper concentrate exceed the standard, the copper concentrate can be placed in the temporary suspension area 8.

[0075] In an embodiment, the conveying assembly 5 comprises a moving beam 51 slidingly arranged with the fixed frame 4, and electric telescopic rods 52 arranged at both ends of the moving beam 51, and a clamping assembly 53 arranged at the movable end of the electric telescopic rods 52 for clamping the carrier 2;

[0076] After the copper concentrate is detected by the X-ray fluorescence analyzer 3, the copper concentrate is moved out of the X-ray fluorescence analyzer 3 from the other side, at this time, the height of the clamping assembly 53 is adjusted by the electric telescopic rods 52 to be located at both ends of the carrier 2, and then the clamping assemblies 53 on both sides are moved inward to clamp and fix the carrier 2; if it is qualified, when it is moved to the feeding port 6, the carrier 2 is turned over, the copper concentrate is poured along the feeding port 6, and then the empty carrier 2 is moved into the recovery area 7; if it is unqualified, the copper concentrate is directly moved into the temporary area 8, and the conveying assembly 5 is returned to the conveyor belt 1 again to continue waiting.

[0077] In an embodiment, a lead screw 41 is rotatably arranged in the fixed frame 4, and a first sliding block 50 is fixedly arranged on the top of the moving beam 51 and sleeved on the lead screw 41, and one end of the lead screw 41 is provided with a motor for driving the lead screw 41 to rotate, mainly to enable the moving beam 51 to move along the fixed frame 4.

[0078] In an embodiment, a bidirectional threaded rod 511 is rotatably arranged in the moving beam 51, and a second sliding block 521 is arranged at the top end of the electric telescopic rod 52 and sleeved on the bidirectional threaded rod 511, and one end of the bidirectional threaded rod 511 is provided with a motor for driving the bidirectional threaded rod 511 to rotate, mainly to control the two clamping assemblies 53 to move inward or outward at the same time, to realize clamping and loosening.

[0079] In an embodiment, the clamping assembly 53 comprises a connecting rod 531 connected with the electric telescopic rod 52, a clamping plate 532 arranged at one end of the connecting rod 531 away from the electric telescopic rod 52, a cross-shaped insertion rod 533 rotatably arranged on one side of the clamping plate 532, one of the clamping plates 532 is provided with a motor for driving the cross-shaped insertion rod 533 to rotate, and a support rod 21 is fixedly arranged at both ends of the carrier 2, and the support rod 21 is provided with a cross-shaped groove 22 matched with the cross-shaped insertion rod 533, after the cross-shaped insertion rod 533 and the cross-shaped groove 22 are aligned, the cross-shaped insertion rod 533 can be moved inward to be inserted into the cross-shaped groove 22, and during pouring, the cross-shaped insertion rod 533 can be rotated to drive the carrier 2 to turn over, and the copper concentrate is poured into the feeding port 6.

[0080] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A method for monitoring the opening of a contaminated acid circuit in a copper smelter off-gas acid production, characterized in that, It comprises the following steps: S1, obtaining the impurity components in the copper concentrate through the furnace charge collection system, and determining the furnace charge ratio according to the input amount; S2, calculating the amount of each impurity entering the purification system according to the collected data, calculating the impurity concentration in the purified dilute acid under the proposed condition through the proposed system water supplement amount, and analyzing the over-standard risk of each impurity according to the impurity concentration to determine the calculated waste acid opening amount; S3, after acid production, collecting the amount of each impurity in the actual production waste acid; S4, adjusting the purification water supplement amount and the waste acid opening amount according to the actual collection of each impurity amount and the control interval of each type of impurity in the waste acid, so that each type of impurity in the waste acid is within the design control range; S5, comparing and analyzing the actual collection of impurities with the calculated results; S6, adjusting the front-end production control or adjusting the furnace charge ratio according to the analysis results; The S1 specifically comprises: S11, divide the copper concentrate to be fed into several parts, and record the weight of each part of the copper concentrate; S12, detect each part of the copper concentrate by a fluorescence detector to measure the mass fraction of each impurity in the copper concentrate and obtain the mass of each impurity in the copper concentrate; S13, put the detected copper concentrate into the furnace and calculate the total amount of each impurity; The S13 specifically further comprises: S131, add the mass of each impurity measured in the current copper concentrate to the total mass of each impurity of the copper concentrate fed before, and calculate the mass fraction of each impurity after adding the copper concentrate; S132, compare the result calculated in S131 with the maximum mass fraction of each impurity in S102 to determine whether the current mass fraction of each impurity is over-standard; If at least one of them is over-standard, move the copper concentrate to the temporary suspension area; If it is not over-standard, first put it into the furnace, then traverse the copper concentrate in the temporary suspension area, add the amount of each impurity again and determine whether it is over-standard, and repeat the process.

2. A method of monitoring the opening of a contaminated acid circuit in a copper smelter sulphuric acid plant according to claim 1, characterized in that The S11 further comprises before it: S101, calculate the maximum mass of each impurity according to the maximum acid storage capacity of the system and the maximum concentration of each impurity allowed by the system; S102, calculate the maximum mass fraction of each impurity according to the maximum mass of each impurity and the feeding amount.

3. A charge collection system for use in a method of monitoring the opening of a contaminated acid circuit in a copper smelter off-gas acid plant according to claim 1 or 2, characterized in that It comprises: A conveyor belt (1) for conveying a bracket (2) on which the weighed copper concentrate is placed; An X-ray fluorescence analyzer (3) arranged on the conveyor belt (1) for detecting the amount of each impurity in each part of the copper concentrate; A conveying assembly (5) arranged on the back side of the conveying direction of the conveyor belt (1), the top of the conveying assembly (5) is provided with a fixing frame (4), the conveying assembly (5) is slidably connected with the fixing frame (4), and the conveying assembly (5) is used for conveying the detected copper concentrate; The side of the conveying assembly (5) away from the conveyor belt (1) is provided with a feeding port (6), one side of the feeding port (6) is provided with a recovery area (7), and the top of the recovery area (7) is provided with a temporary suspension area (8); When each part of the copper concentrate is conveyed backward along the conveyor belt (1), the copper concentrate is detected and analyzed by the X-ray fluorescence analyzer (3) to determine the amount of each impurity, and then the detected copper concentrate is conveyed backward by the conveying assembly (5) to determine whether it is put into the furnace; After judging that the amount of impurities will not exceed the standard, the copper concentrate can be put into the feeding port (6), and then the bracket (2) is placed in the recovery area (7), if the impurities in the copper concentrate exceed the standard, the copper concentrate is placed in the temporary area (8).

4. A charge collection system according to claim 3, wherein, The conveying assembly (5) comprises a moving cross beam (51) slidingly arranged with the fixed frame (4), both ends of the moving cross beam (51) are provided with electric telescopic rods (52), and the movable ends of the electric telescopic rods (52) are provided with clamping assemblies (53) for clamping the bracket (2).

5. A charge collection system according to claim 4, wherein, The fixed frame (4) is rotatably provided with a lead screw (41), and the top of the moving cross beam (51) is fixedly provided with a first sliding block (50) sleeved on the lead screw (41).

6. A charge collection system according to claim 4, wherein, The moving cross beam (51) is rotatably provided with a bidirectional threaded rod (511), and the top end of the electric telescopic rod (52) is provided with a second sliding block (521) sleeved on the bidirectional threaded rod (511).

7. A charge collection system according to claim 4, wherein The clamping assembly (53) comprises a connecting rod (531) connected with the electric telescopic rod (52), one end of the connecting rod (531) away from the electric telescopic rod (52) is provided with a clamping plate (532), one side of the clamping plate (532) is rotatably provided with a cross insertion rod (533), both ends of the bracket (2) are fixedly provided with support rods (21), and the support rods (21) are provided with cross grooves (22) matched with the cross insertion rod (533).

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