Suspension air flow type ardealite integrated treatment device and method

Abstract

The invention discloses a suspension air flow type ardealite integrated treatment device and belongs to the technical field of industrial gypsum producing and processing. The suspension air flow typeardealite integrated treatment device comprises a drying unit, a high-temperature decontaminating unit, a roasting unit and a cooling unit which are sequentially connected, wherein the a first main heat exchange pipe is connected to one side of the upper part of the high-temperature decontaminating unit; the high-temperature decontaminating unit comprises a decontaminating furnace, the first mainheat exchange pipe and a first discharging system, the first main heat exchange pipe and the first discharging system are connected to the decontaminating furnace, and a first feeding system and a first hot air inlet are connected to the first main heat exchange pipe; the roasting unit comprises a phase change furnace, a second main heat exchange pipe and a second discharging system, the second main heat exchange pipe and the second discharging system are connected to the phase change furnace, a second feeding system is connected to the second main heat exchange pipe, the first discharging system is connected into the second feeding system, and the second discharging system is connected into the cooling unit. Meanwhile, the invention provides a processing method of the suspension air flowtype ardealite integrated treatment device. According to the suspension air flow type ardealite integrated treatment device disclosed by the invention, technologies of drying ardealite, modifying anddecontaminating the ardealite, roasting the ardealite, cooling the ardealite and the like are integrated; thus, the suspension air flow type ardealite integrated treatment device can meet a requirement of processing different physical properties of ardealite into a qualified beta type hemihydrates gypsum cementing material.

Description

technical field [0001] The invention belongs to the technical field of production and processing of industrial gypsum, and in particular relates to a suspension airflow type phosphogypsum integrated treatment device and method. Background technique [0002] Phosphogypsum is a by-product of phosphate fertilizer enterprises in the production process of ammonium phosphate (in the process of sulfuric acid extraction of phosphate rock to produce phosphoric acid). 2 o 5 Total) by-product phosphogypsum is about 5t. In 2015, the national production of phosphogypsum was 80 million tons, a year-on-year increase of 5.26%. However, the comprehensive utilization is 26.5 million tons, and the utilization rate is 33.13%, which is significantly lower than the utilization rate of desulfurized gypsum (74%). [0003] According to incomplete statistics, the stockpile of phosphogypsum in my country has exceeded 300 million tons. With the increase in the production of high-concentration phosph...

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Problems solved by technology

The traditional gypsum process is relatively simple (mainly calcined dihydrate gypsum into hemihydrate gypsum as the core), which is not suitable for the material characteristics of phosphogypsum and the special requirements for impurity removal and modification. Therefore, it cannot effectively remove harmful Impurities seriously restrict the comprehensive utilization of phosphogypsum

Moreover, most of the processes are extensive, the equipment is simple, and the technical level is low, resulting in low single-line output, high energy consumption, and serious dust pollution, resulting in the quality and performance (strength, setting time) of phosphogypsum cement (β-type hemihydrate gypsum powder) cannot meet The production technology requirements of the downstream gypsum cementitious material products industry (such as paper-faced gypsum board, gypsum strip board, fiber-reinforced gypsum board, gypsum block, gypsum mortar, etc.), the product performance is obviously inferior to natural gypsum and other industrial by-product gypsum products , so it is not yet possible to promote the application in large quantities in China

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