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Manufacturing method of high-concentration long-distance transport additive for phosphate concentrate

发布日期:2020-01-18 03:51 Document serial number: 19730131 Release date: 2020-01-18 03:51

The invention belongs to the field of ore dressing and flotation, and particularly relates to a high-concentration long-distance transport additive for phosphate concentrate.



Background technique:

Large phosphate ore beneficiation plants such as Morocco, Saudi Arabia, Israel, and the United States are located dozens of kilometers away from phosphate production equipment. The concentrate produced by the beneficiation must be transported to the phosphate plant through tens of kilometers of pipeline. Due to the high concentration of the pulp, high viscosity, and flow Poor performance, easy sedimentation, easy scaling, etc., lead to difficulties in slurry transportation, not only poor transportation capacity, large power consumption, but also easy to block and scale. The slurry conveying pipeline and power system were determined before the plant was established. Changing and replacing it is not only costly but also time consuming. Therefore, most of the concentrates floated out by these large enterprises use the method of adding phosphate concentrate additives to solve the existing problems in the transportation process. problem.



Technical realization elements:

The technical problem to be solved by the present invention is to provide a high-concentration long-distance slurry transporting additive for phosphate concentrate, which aims at the problems of large consumption, poor stability, and easy scaling of the slurry transporting additives currently on the market.

To solve the above technical problems, the present invention adopts the following technical solutions:

A high-concentration long-distance transport additive for phosphate concentrate, which is characterized in that, based on the percentage of the total weight of the raw material, it is composed of the following raw materials: sodium polyphosphate 60-80%, sodium polyacrylate 50% solution 15-30% 5 to 10% of ethylene glycol. The preparation method is as follows: 15 to 30% sodium polyacrylate 50% solution is added to the mixer, and then 5 to 10% ethylene glycol and 60 to 80% sodium phosphate are sequentially added to the mixer to stir and dissolve for 1.5 hours, that is, The high-concentration long-distance transport additive of the phosphate concentrate is obtained.

The sodium polyphosphate is sodium tripolyphosphate, sodium hexametaphosphate, or sodium pyrophosphate.

The molecular weight of sodium polyacrylate in the 50% sodium polyacrylate solution is 2000-4000.

The phosphate concentrate of the present invention has the advantages of high-concentration and long-distance slurry transportation additives, and has the advantages of strong viscosity-reducing ability, good dispersibility, less water precipitation, strong fluidity, large resistance-reducing ability, and difficulty in scaling. Therefore, the amount of additives is small, the slurry transportation capacity is large, the power consumption is low, and it has no impact on subsequent processes, and has excellent cost performance. Raw materials are cheap and easy to obtain, and the method is simple and easy to control. The raw materials of the invention such as sodium polyphosphate, 50% sodium polyacrylate solution, and ethylene glycol can be purchased directly.

detailed description

The principles and features of the present invention are described below in conjunction with specific embodiments. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. The raw materials of the present invention include sodium polyphosphate (sodium tripolyphosphate, sodium hexametaphosphate, and sodium pyrophosphate), a 50% solution of sodium polyacrylate, and ethylene glycol.

Example 1:

The high-concentration long-distance transport additive of the phosphate concentrate of this embodiment is composed of the following raw materials based on the percentage of the total weight of the raw materials: sodium hexametaphosphate 60%, sodium polyacrylate 50% solution 30%, and ethylene glycol 10 %. The method for preparing the above-mentioned transportation additive includes the following steps: 1) Based on the percentage of the total weight of the raw materials, the following raw materials are weighed: sodium hexametaphosphate 60%, sodium polyacrylate 50% solution 30%, and ethylene glycol 10 %. 2) First add 50% sodium polyacrylate solution to the mixer, and then add ethylene glycol and sodium hexametaphosphate to the mixer in order to stir and dissolve for 1.5 hours to obtain the high-concentration long-distance transport additive for phosphate concentrate.

Example 2:

The high-concentration long-distance transport additive of phosphate concentrate in this embodiment is composed of the following raw materials based on the percentage of the total weight of the raw materials: sodium tripolyphosphate 75%, sodium polyacrylate 50% solution 20%, ethylene glycol 5 %. The method for preparing the above-mentioned transportation additive includes the following steps: 1) Based on the percentage of the total weight of the raw materials, the following raw materials are weighed: sodium tripolyphosphate 75%, sodium polyacrylate 50% solution 20%, and ethylene glycol 5 %. 2) Add 50% sodium polyacrylate solution to the mixer, and then add ethylene glycol and sodium tripolyphosphate to the mixer in order to stir and dissolve for 1.5 hours to obtain the high-concentration long-distance transport additive for phosphate concentrate.

Example 3:

The phosphate concentrate with high concentration and long-distance transportation additives in this embodiment is composed of the following raw materials based on the percentage of the total weight of the raw materials: sodium pyrophosphate 80%, sodium polyacrylate 50% solution 15%, and ethylene glycol 5% . The method for preparing the above-mentioned transport additive includes the following steps: 1) Based on the percentage of the total weight of the raw materials, the following raw materials are weighed: sodium pyrophosphate 80%, sodium polyacrylate 50% solution 15%, and ethylene glycol 5% . 2) Add 50% sodium polyacrylate solution to the mixer, and then add ethylene glycol and sodium pyrophosphate to the mixer in order to stir and dissolve for 1.5 hours to obtain the high-concentration long-distance transport additive for phosphate concentrate.

Example 4:

The high-concentration long-distance transport additive of phosphate concentrate in this embodiment is composed of the following raw materials based on the percentage of the total weight of the raw materials: sodium hexametaphosphate 70%, sodium polyacrylate 50% solution 22%, ethylene glycol 8 %. The method for preparing the above-mentioned transport additive includes the following steps: 1) Based on the percentage of the total weight of the raw materials, the following raw materials are weighed: sodium hexametaphosphate 70%, sodium polyacrylate 50% solution 22%, and ethylene glycol 8 %. 2) First add 50% sodium polyacrylate solution to the mixer, and then add ethylene glycol and sodium hexametaphosphate to the mixer in order to stir and dissolve for 1.5 hours to obtain the high-concentration long-distance transport additive for phosphate concentrate.

The detection performance indicators of the high-concentration long-distance transportation additive of the phosphate concentrate obtained in Examples 1-4 are as follows:

It can be seen that the high-concentration long-distance transport additive of the phosphate concentrate of the present invention has the advantages of strong viscosity reducing ability, good dispersibility, less water precipitation, strong fluidity, and large resistance reducing ability. Therefore, the amount of additives is small, the slurry transportation capacity is large, the power consumption is low, and it has no impact on subsequent processes, and has excellent cost performance.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Inside.

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