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A method for producing sulfur-containing ammonium phosphate by using industrial by-product desulfurization paste

A technology of sulfur-containing ammonium phosphate and industrial by-products, applied in ammonium orthophosphate fertilizer, phosphate fertilizer, agriculture, etc., to achieve the effects of easy mixing, safe transportation, and low cost of technical transformation

Active Publication Date: 2020-10-30
云南云天化以化磷业研究技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It includes mixing desulfurization paste and ammonium phosphate production washing liquid in proportion, replacing the existing sulfur grinding process, and directly mixing desulfurization paste slurry with wet-process phosphoric acid and ammonia in the reactor to produce sulfur-containing ammonium phosphate products. Solve the economic utilization of industrial by-product desulfurization paste, and meet the market demand for sulfur-containing ammonium phosphate products

Method used

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  • A method for producing sulfur-containing ammonium phosphate by using industrial by-product desulfurization paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Production of sulfur-containing ammonium phosphate, such as figure 1 Shown:

[0024] Step 1: Mix desulfurization paste with a sulfur content of 40% into P 2 o 5 40% phosphoric acid, add a certain amount of washing liquid and mix to obtain sulfur-containing phosphoric acid with a sulfur content of 1%, and intermediate material A is obtained.

[0025] The second step: producing sulfur-containing ammonium phosphate. The above-mentioned intermediate material A is pressed figure 1 It is introduced into the reactor, reacted with ammonia gas, transported into the reactor and granulated after the reaction is completed, dried with hot air below 250°C, crushed and sieved to obtain sulfur-containing ammonium phosphate.

[0026] Table 1 Analysis results of sulfur-containing ammonium phosphate

[0027] Indicator name Total N% Effective P 2 o 5 / (%)

Embodiment 2

[0029] Step 1: Mix desulfurization paste with a sulfur content of 60% into P 2 o 5 47% phosphoric acid, add a certain amount of washing liquid and mix to obtain sulfur-containing phosphoric acid with a sulfur content of 5%, to obtain intermediate material A.

[0030] The second step: producing sulfur-containing ammonium phosphate. The above-mentioned intermediate material A is pressed figure 1 It is introduced into the reactor, reacted with ammonia gas, transported into the reactor and granulated after the reaction is completed, dried with hot air below 250°C, crushed and sieved to obtain sulfur-containing ammonium phosphate.

[0031] Table 2 Analysis results of sulfur-containing heavy calcium

[0032] Indicator name Total N% Effective P 2 o 5 / (%)

Embodiment 3

[0034] Step 1: Mix desulfurization paste with a sulfur content of 60% into P 2 o 5 54% phosphoric acid, add a certain amount of washing liquid and mix to obtain sulfur-containing phosphoric acid with a sulfur content of 10%, to obtain intermediate material A.

[0035] The second step: producing sulfur-containing ammonium phosphate. The above-mentioned intermediate material A is pressed figure 1 It is introduced into the reactor, reacted with ammonia gas, transported into the reactor and granulated after the reaction is completed, dried with hot air below 250°C, crushed and sieved to obtain sulfur-containing ammonium phosphate.

[0036] Table 3 Analysis results of sulfur-containing ammonium phosphate

[0037] Indicator name Total N% Effective P 2 o 5 / (%)

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Abstract

The invention discloses a method for producing sulfur-containing ammonium phosphates. The method comprises the steps that firstly, byproduct sulfur paste of synthesis ammonia, coking coal and other factories is added into a phosphoric acid storage tank on the basis of the calculated amount and conveyed to a reactor after being stirred to be uniform, and pelleting and drying are performed to obtain the sulfur-containing ammonium phosphates. The byproduct sulfur paste and an existing ammonium phosphate device are used for producing fertilizer containing phosphorus, sulfur and other nutrient elements, an original technological path is not changed, and the low-cost product upgrading method is provided for a traditional device. The obtained product contains uniform elemental sulfur, the material returning frequency is greatly decreased, the dust explosion probability is lowered, and the byproduct sulfur paste is economically utilized.

Description

technical field [0001] The invention belongs to the technical field of phosphate fertilizer production, and in particular relates to a production method for directly preparing sulfur-containing ammonium phosphate by using industrial by-product desulfurization paste. Background technique [0002] Ammonium phosphate mainly includes diammonium phosphate and monoammonium phosphate products, which use wet-process phosphoric acid and ammonia as raw materials to obtain different ammonium phosphate products by controlling different degrees of neutralization. In recent years, in order to meet the requirements of agricultural production, ammonium phosphate fertilizers containing medium element sulfur have been developed at home and abroad. The production process is to spray liquid sulfur on the ammoniated ammonium phosphate material or wrap liquid sulfur on the surface of the product on the traditional ammonium phosphate device. , There is also the sulfur that is ground into a paddle ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00
CPCC05B7/00C05D9/00
Inventor 曾波马航匡家灵齐涛
Owner 云南云天化以化磷业研究技术有限公司
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