In-situ leaching mine uranium water smelting qualified liquid separation control method

Abstract

The present application belongs to control method, and specifically relates to a kind of in-situ leaching mine uranium hydrometallurgy qualified liquid liquid separation control method.A kind of in-situ leaching mine uranium hydrometallurgy qualified liquid liquid separation control method, wherein, including the following contents: step one: set liquid separation uranium concentration;Step two: set liquid separation time;Step three: exception handling.The present application has the following remarkable effects: the uranium concentration of the precipitated qualified liquid is maintained at 36-39g / L, the uranium concentration of the qualified liquid is increased by 90-95%, the effect is good, and the operator can set the relevant parameters according to the specific situation at any time to ensure that the precipitated qualified liquid has an ideal uranium concentration.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of control method, and particularly relates to a kind of in-situ leaching mine uranium hydrometallurgy qualified liquid liquid separation control method. BACKGROUND

[0002] The high and low of the precipitation qualified liquid uranium concentration directly affects the quality and production cost of the final product, and improving the precipitation uranium concentration has been a research topic in the uranium hydrometallurgy process, and the core is the qualified liquid liquid separation operation. The original design of a uranium deposit in Xinjiang is that 30% of the qualified liquid is used for precipitation, and 70% is returned to saturation and re-adsorption. The liquid separation control is basically in a random state, and the qualified liquid uranium concentration is not set when the liquid separation is performed. Therefore, the precipitation qualified liquid uranium concentration is basically high or low, it is difficult to use high concentration qualified liquid for precipitation, and the precipitation qualified liquid uranium concentration is generally maintained at about 20g / L.

[0003] With the continuous decrease of uranium ore resources in the deposit, the uranium concentration of the leaching solution decreases year by year, and the prices of various auxiliary materials increase year by year. The production cost is increasing, and improving the precipitation qualified liquid uranium concentration is the key link to reduce the enterprise cost and ensure the product quality. SUMMARY

[0004] The application provides a kind of in-situ leaching mine uranium hydrometallurgy qualified liquid liquid separation control method aiming at the defects of the prior art.

[0005] The application is realized as follows: a kind of in-situ leaching mine uranium hydrometallurgy qualified liquid liquid separation control method, wherein the following contents are included:

[0006] Step one: setting the liquid separation uranium concentration;

[0007] Step two: setting the liquid separation time;

[0008] Step three: abnormal situation processing.

[0009] The application is realized as follows: a kind of in-situ leaching mine uranium hydrometallurgy qualified liquid liquid separation control method, wherein the following contents are included:

[0010] 1. checking the specific change condition of the peak value of the leaching curve,

[0011] 2. setting the liquid separation uranium concentration of the qualified liquid in the current leaching cycle according to the leaching curve in the last leaching cycle,

[0012] 3. inputting the liquid separation uranium concentration into the "set concentration" of the setting frame,

[0013] 4. when the "online concentration" exceeds the "set concentration", automatically or manually starting the liquid separation of the pneumatic diaphragm valve,

[0014] 5. when the "online concentration" is lower than the "set concentration", automatically or manually ending the liquid separation operation,

[0015] Periodically clean and check the uranium concentration on-line analyzer to ensure its measurement accuracy.

[0016] The in-situ leaching mine uranium hydrometallurgy qualified liquid separation control method as claimed in claim 1, wherein the step two comprises

[0017] (1) calculating the qualified liquid separation volume of each cycle according to the adsorbed metal amount of the hydrometallurgy system and the uranium concentration of the qualified liquid,

[0018] (2) calculating the time required for the qualified liquid separation volume of each cycle according to the leaching flow and,

[0019] (3) inputting the calculated separation time into the "separation time" of the setting frame,

[0020] (4) automatically or manually starting the separation pneumatic diaphragm valve to perform separation when the "separation time" is started,

[0021] (5) automatically or manually ending the separation operation when the time exceeds the "separation time".

[0022] The in-situ leaching mine uranium hydrometallurgy qualified liquid separation control method as claimed in claim 1, wherein the step two (1) comprises

[0023] According to the material conservation, the adsorbed metal is equal to the qualified liquid metal:

[0024] W = NCV is obtained from the formula: 吸

[0025] V = W 吸 / NC

[0026] Wherein W 吸 : the amount of adsorbed uranium metal of the hydrometallurgy per day (kg);

[0027] C: the uranium concentration of the precipitated qualified liquid (g / L);

[0028] N: the number of leaching per day;

[0029] V: the volume of the precipitated qualified liquid to be separated per leaching cycle (m 3 ).

[0030] The in-situ leaching mine uranium hydrometallurgy qualified liquid separation control method as claimed in claim 1, wherein the step two (2) comprises

[0031] V = Q 淋 *t is obtained from the formula:

[0032] t = V / Q 淋

[0033] Wherein: V: the volume of the precipitated qualified liquid to be separated per leaching cycle (m 3 ); ​

[0034] Q 淋 : Eluate flow rate (m 3 / h).

[0035] The method for controlling the separation of qualified liquid in an in-situ leaching mine, wherein the step three comprises

[0036] 1. When the uranium concentration of the qualified liquid in a certain period is too low, the separation operation can be stopped, and the qualified liquid is delivered to the saturated re-adsorption tower to increase the uranium capacity of the resin.

[0037] 2. When the uranium concentration of the qualified liquid in a certain period is high or continuously high, the separation time can be prolonged, the separation time node can be randomly adjusted, or the uranium concentration of the qualified liquid can be increased to obtain high-concentration qualified liquid.

[0038] The significant effect of the present application is that the uranium concentration of the precipitated qualified liquid is basically maintained at 36-39 g / L, the uranium concentration of the qualified liquid is increased by 90-95%, the effect is good, and the operator can set the relevant parameters at any time according to the specific situation to ensure that the precipitated qualified liquid with ideal uranium concentration is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is an operation flowchart

[0040] Figure 2 is a qualified liquid separation standard chart

[0041] Figure 3 is a qualified liquid separation setting chart

[0042] In the figure: 1. A liquid collection pan, 2. An online uranium concentration analyzer, 3-4. Signal feedback lines, 5. A pneumatic diaphragm three-way valve, 6-7. Valves, 8-9. Liquid level meters, 10-11. Submersible pumps, A. The first leaching tower, B. A central control computer, C. A precipitated qualified liquid storage tank, D. A qualified liquid storage tank DETAILED DESCRIPTION

[0043] Figure 1 is a whole operation flowchart, the online uranium concentration analyzer 2 installed in the liquid collection pan 1 monitors the uranium concentration of the qualified liquid at any time, converts the uranium concentration of the qualified liquid into a signal, and transmits the signal to the central control computer B, and draws a leaching curve, when the uranium concentration of the qualified liquid reaches the set data (or reaches the set separation time), the central control computer sends a command to the pneumatic diaphragm three-way valve 5 to start the separation operation and discharge the high-concentration qualified liquid to the precipitated qualified liquid storage tank C, when the uranium concentration of the qualified liquid is lower than the set concentration (or the set separation time is over), the central control computer B transmits a signal to the pneumatic diaphragm three-way valve to discharge the qualified liquid to the qualified liquid storage tank.

[0044] Figure 2The qualified liquid separation standard chart is used. When the pneumatic diaphragm three-way valve is opened, the red color appears on the elution curve. The first red line of the elution curve in each cycle is the time point of starting the separation operation, the second red line is the time point of ending the separation operation, and the curve between the two red lines is the interval range of the qualified liquid separation. The color marking of the qualified liquid separation can clearly show whether the separation is accurate each time. The historical separation situation can be checked, and the uranium concentration of the upcoming separation can be predicted to ensure that the obtained precipitated qualified liquid uranium concentration is ideal each time, so that the precipitated qualified liquid with high concentration is obtained.

[0045] Figure 3 The qualified liquid separation chart is set on the central control computer. The operation is in two forms: manual and automatic. The separation concentration is set according to the specific situation of the elution curve, and the qualified liquid separation time of each cycle is calculated according to the adsorbed metal amount and the qualified liquid uranium concentration per day. When "automatic" is set, when the "set concentration" exceeds the "online concentration", the separation operation is started, and the timing is started. When one of "set concentration" or "separation time" arrives first, the separation operation is ended. When "manual" is set, the operator needs to manually click the "manual" button to start the separation operation, and also needs to click the "manual" button to end the separation operation.

[0046] The following will be specifically explained

[0047] 1. Set the separation uranium concentration

[0048] (1) Check the specific change of the peak value of the elution curve.

[0049] (2) Set the separation uranium concentration of the qualified liquid in the current elution cycle according to the elution curve in the last elution cycle.

[0050] (3) Input the separation uranium concentration into the "set concentration" of the setting chart.

[0051] (4) When the "online concentration" exceeds the "set concentration", the separation pneumatic diaphragm valve is automatically or manually started for separation.

[0052] (5) When the "online concentration" is lower than the "set concentration", the separation operation is automatically or manually ended.

[0053] (6) Periodically clean and calibrate the uranium concentration online analyzer to ensure its measurement accuracy.

[0054] 2. Set the separation time

[0055] (1) Calculate the qualified liquid separation volume of each cycle according to the adsorbed metal amount and the qualified liquid uranium concentration of the hydrometallurgical system.

[0056] According to the conservation of mass, the adsorbed metal is equal to the qualified liquid metal:

[0057] From the formula W 吸 = NCV, it is obtained that

[0058] V = W 吸 / NC

[0059] Where W 吸 : the amount of uranium metal adsorbed by water per day (kg);

[0060] C: the concentration of liquid uranium in the qualified sediment (g / L);

[0061] N: the number of leaching times per day;

[0062] V: the volume of the qualified sediment to be separated per leaching cycle (m 3 )

[0063] 2. Calculate the time required for separating the volume of the qualified sediment per cycle according to the leaching flow and V.

[0064] V = Q 淋 *t, we have:

[0065] t = V / Q 淋

[0066] Where: V: the volume of the qualified sediment to be separated per leaching cycle (m 3 );

[0067] Q 淋 : the flow of leaching agent (m 3 / h).

[0068] 4. Input the calculated separation time into the "separation time" of the setting frame.

[0069] 5. When the "separation time" is started, the separation of the pneumatic diaphragm valve is automatically or manually started.

[0070] 6. When the time exceeds the "separation time", the separation operation is automatically or manually ended.

[0071] 3. Abnormal situation handling

[0072] 1. When the concentration of liquid uranium in the qualified sediment is too low in a certain cycle, the separation operation can be stopped, and the qualified sediment is delivered to the saturated re-adsorption tower to increase the uranium capacity of the resin.

[0073] 2. When the concentration of liquid uranium in the qualified sediment is high or continuously high in a certain cycle, the separation time can be extended, the separation time node can be randomly adjusted, or the uranium concentration of the qualified sediment can be increased to obtain high-concentration qualified sediment.

[0074] The above is the complete operation process of the qualified sediment separation control method for uranium hydrometallurgy in an in-situ leaching mine.

Claims

1. A method for controlling the separation of qualified liquid in uranium hydrometallurgy in an in-situ leaching mine, characterized in that: Includes the following: Step 1: Set the uranium concentration of the liquid separation; Step 2: Set the dispensing time; Step 3: Handling abnormal situations; The step 1 includes ⑴ Check the specific changes in the peak value of the elution curve, ⑵ According to the elution curve in the last elution cycle, set the uranium concentration of the qualified liquid in this elution cycle. ⑶ Input the concentration of uranium in the liquid separation into the "Set Concentration" of the setting frame. ⑷When the "online concentration" exceeds the "set concentration", the pneumatic diaphragm valve is automatically or manually started to separate the liquid. ⑸When the "online concentration" is lower than the "set concentration", the dispensing operation is automatically or manually ended. (6) Regularly clean and calibrate the uranium concentration online analyzer to ensure its measurement accuracy; The second step includes ⑴Calculate the volume of qualified liquid separation in each cycle based on the amount of metal adsorbed by the hydrometallurgical system and the uranium concentration of qualified liquid. ⑵ According to the elution flow rate and, calculate the time required for the qualified liquid separation volume in each cycle, ⑶ Input the calculated dispensing time into the "dispensing time" setting frame. ⑷When the "liquid separation time" is started, the pneumatic diaphragm valve for liquid separation is automatically or manually started. ⑸When the time exceeds the "dispensing time", the dispensing operation is automatically or manually ended; The step 2 (1) includes According to the law of conservation of matter, the adsorbed metal is equal to the qualified liquid metal: According to the formula W 吸 =NCV: V=W 吸 / NC Where W 吸 : Daily uranium metal adsorption by water (kg); C: uranium concentration of qualified precipitation solution (g / L); N: number of showers per day; V: Volume of qualified precipitation solution to be separated in each elution cycle (m 3 ); The step (2) includes According to the formula V=Q 淋 *t is: t=V / Q 淋 in :V:The volume of qualified precipitation liquid to be separated in each elution cycle (m 3 ); Q 淋 :Eluent flow rate (m 3 / h); The step three includes ⑴ If the uranium concentration of qualified liquid is too low in a certain cycle, the liquid separation operation can be stopped and all qualified liquid can be transported to the saturated re-adsorption tower to increase the resin uranium capacity. ⑵ If the uranium concentration of the qualified liquid is high or continues to be high within a certain period, the separation time can be extended, the separation time node can be randomly adjusted, or the uranium concentration of the qualified liquid separation can be increased to obtain high-concentration qualified liquid.

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