High-power half-medium-low-grade silicon-calcium phosphorite combined separation process

A kind of phosphorite, low-grade technology, applied in the field of combined separation of high-semi-medium-low-grade siliceous calcareous phosphorite, can solve the problems of high production cost, stagnant mines, complicated processes, etc., and achieve comprehensive utilization of phosphorous resources. high rate effect

Active Publication Date: 2020-08-25
WENGFU (GRP) CO LTD +1
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AI Technical Summary

Problems solved by technology

to R 2 o 3 , SiO 2 The sorting forward and reverse flotation process has the disadvantages of complicated process and high production cost
There is no effective separation process for indus

Method used

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  • High-power half-medium-low-grade silicon-calcium phosphorite combined separation process

Examples

Experimental program
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Effect test

Embodiment

[0034] Example: refer to figure 1 .

[0035] A collophosite raw ore in Southwest China was crushed (particle size ≤ 15mm) and then wet-milled in a closed circuit, with a grinding fineness of -200 mesh 62%.

[0036] Phosphoric acid is added to the flotation pulp to wash the acid wastewater, the pH value of the flotation pulp is 5, and the reverse flotation collector (WF-01) is added according to 450g / t raw ore. The reverse flotation process of one roughing and one open-circuit sweeping is adopted: the product in the roughing tank is used as the flotation concentrate, and the roughing foam product flows to the sweeping operation by itself; the sweeping foam is used as the final flotation tailings, and the The product is as a sweep concentrate.

[0037] The flotation concentrate is classified by the hydrocyclone group, and the classification particle size is -400 mesh (38um). The cyclone underflow (wt65%) is sent to the phosphoric acid plant in the form of slurry. The slag po...

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Abstract

The invention discloses a high-power half-medium-low-grade silicon-calcium phosphorite combined separation process, and belongs to the field of phosphorite separation. The process specifically comprises the following steps that a high-power half-medium-low-grade silicon-calcium phosphorite is subjected to wet grinding and then reverse flotation is carried out to obtain flotation concentrate and tailings, the flotation concentrate is subjected to graded desliming, low-magnesium and low-half graded coarse-grained materials are final concentrate, and fine-grained materials are taken as middlings;and the concentrate product is allowed to be subjected to downstream wet-process phosphoric acid, middling smelting yellow phosphorus and tailing cemented filling treatment. According to the process,the content of concentrate metal ion oxide and silicon dioxide is reduced through reverse flotation and grading desliming combined separation. The middlings with certain phosphorus content and high silicon content are used for smelting yellow phosphorus, and the comprehensive utilization rate of phosphorus resources is high; the tailings cemented filling treatment is carried out, and no three wastes are discharged by a system.

Description

technical field [0001] The invention relates to a combined separation process of high-grade semi-medium-low-grade silicon-calcium phosphate ore, which belongs to the field of phosphate rock separation and comprehensive utilization of products. Background technique [0002] At present, most of the phosphate rocks in China are used for wet-process phosphoric acid, and some massive phosphate rocks are used for smelting yellow phosphorus in electric furnaces. [0003] The wet process phosphoric acid process affects the grade of phosphate rock (P 2 o 5 %) and impurity content have certain requirements. Among them, the impurity content is mainly metal ion (Mg, Fe, Al) oxides, phosphate rock SiO used for acid processing in phosphorus chemical enterprises 2 The content is usually required to be below 6%. On the contrary, due to SiO 2 Solubilizing effect, smelting yellow phosphorus paraphosphate ore SiO by electric furnace method 2 There is a minimum requirement for the content...

Claims

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Application Information

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IPC IPC(8): B03B9/00B03B1/00B03B1/04B03D1/02B03B5/34C01B25/027C01B25/01B03D103/06
CPCB03B9/00B03B1/00B03B1/04B03D1/021B03B5/34C01B25/027C01B25/01B03D2203/06
Inventor 张仁忠张瑛王举亮何德飞王怀军林杰宋友龙袁俊肖汩庹宇翔
Owner WENGFU (GRP) CO LTD
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