Method for production of phosphoric acid and coproduction of alkaline fertilizer from phosphate ore and potash feldspar

A technology of alkaline fertilizer and potassium feldspar, which is applied in the field of comprehensive utilization of resources and chemical production to achieve the effect of improving overall value, diverse nutrients and simple process

Active Publication Date: 2013-12-25
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Method for production of phosphoric acid and coproduction of alkaline fertilizer from phosphate ore and potash feldspar
  • Method for production of phosphoric acid and coproduction of alkaline fertilizer from phosphate ore and potash feldspar
  • Method for production of phosphoric acid and coproduction of alkaline fertilizer from phosphate ore and potash feldspar

Examples

Experimental program
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Example Embodiment

[0035] Example 1

[0036] Raw material 1: Phosphate rock, collection location: Weng'an Mining, Guizhou

[0037] The chemical composition of phosphate rock is shown in the following table:

[0038]

[0039] Material 2: Potash feldspar, collection location: Guizhou Qiping

[0040] The chemical composition of potassium feldspar is shown in the following table:

[0041]

[0042] A method for producing phosphoric acid and co-producing alkaline fertilizer with phosphate rock and potash feldspar includes the following steps:

[0043] Mix phosphate rock: potash feldspar: coke in a mass ratio of 1:1:0.32, grind, pass through a 100-mesh sieve, add water to make balls, and calcinate in a blast furnace at 1350°C for 30 minutes to obtain slag and blast furnace gas;

[0044] The blast furnace gas is cooled in a water bath at room temperature to obtain the crude phosphorus and most of the phosphorus sludge. The preliminary treated blast furnace gas passes through the venturi tube and the fiber defogger ...

Example Embodiment

[0048] Example 2

[0049] Raw material 1: Phosphate rock, collection location: Guizhou Jinde Mining

[0050] The chemical composition of phosphate rock is shown in the following table:

[0051]

[0052] Raw material 2: Potash feldspar, collection location: Guizhou Jinde Mining

[0053] The chemical composition of potassium feldspar is shown in the following table:

[0054]

[0055] A method for producing phosphoric acid and co-producing alkaline fertilizer by using phosphate rock and potash feldspar includes the following steps:

[0056] Mix the phosphate rock: potash feldspar: coke according to the mass ratio of 1:0.65:0.26, grind, pass through a 120-mesh sieve, add water to make balls, and calcinate in a blast furnace at 1150°C for 120 minutes to obtain slag and blast furnace gas;

[0057] The blast furnace gas is leached and cooled in a normal temperature water bath through a series of three-stage absorption towers to obtain crude phosphorus and most of the phosphorus sludge. The preli...

Example Embodiment

[0061] Example 3

[0062] Raw material 1: Phosphate rock, collection location: Weng'an Mining, Guizhou

[0063] The chemical composition of phosphate rock is shown in the following table:

[0064]

[0065] Raw material 2: Potash feldspar, collection location: Guizhou Jinde Mining

[0066] The chemical composition of potassium feldspar is shown in the following table:

[0067]

[0068] A method for producing phosphoric acid and co-producing alkaline fertilizer by using phosphate rock and potash feldspar includes the following steps:

[0069] Mix phosphate rock: potash feldspar: coke in a mass ratio of 1:0.92:0.30, grind, pass through a 150-mesh sieve, add water to make balls, and calcinate in a blast furnace at 1200°C for 90 minutes to obtain slag and blast furnace gas;

[0070] The blast furnace gas is cooled by a water bath at room temperature to obtain the crude phosphorus and most of the phosphorus sludge. The preliminary treated blast furnace gas passes through the venturi tube and th...

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Abstract

The invention relates to a method for production of phosphoric acid and coproduction of an alkaline fertilizer from phosphate ore and potash feldspar. The method comprises the following steps: burdening the phosphate ore, the potash feldspar and coke, grinding, granulating and calcining by a blast furnace to get furnace slag and blast furnace gas, firstly cooling the blast furnace gas by a water bath to recover crude phosphorus and phosphorus sludge, and performing dust removal on the blast furnace gas after cooling by the water bath to recover the phosphorus sludge; performing oxidative combustion on the crude phosphorus and the phosphorus sludge, and then absorbing phosphorus pentoxide gas by water to prepare the phosphoric acid; and performing water quenching, drying and grinding on the furnace slag to prepare the alkaline fertilizer. The calcination product furnace slag obtained by the method disclosed by the invention does not need to be purified again, and the absorbable alkaline fertilizer for crops can be obtained by simple water quenching, drying and grinding; the steps are simple, and the obtained alkaline fertilizer contains various and rich nutrients; by adding the potash feldspar as an additive and reactant, the alkaline fertilizer and synthetic ammonia can be coproduced during the production of the phosphoric acid, the various raw materials are ingeniously comprehensively utilized, and the integral value of the process is further upgraded.

Description

technical field [0001] The invention relates to a method for producing phosphoric acid and alkaline potassium fertilizer by using phosphate rock and potassium feldspar, and belongs to the technical fields of resource comprehensive utilization and chemical production. Background technique [0002] The industrial production process of phosphoric acid is mainly divided into three types: wet process phosphoric acid, thermal process phosphoric acid and kiln process (or blast furnace process) phosphoric acid. Wet process phosphoric acid refers to the use of sulfuric acid to decompose medium and high-grade phosphate rock to produce phosphoric acid. Thermal phosphoric acid refers to the production of phosphoric acid by burning, oxidizing, and hydrating yellow phosphorus in the electric furnace method. The phosphoric acid obtained by this method is of good quality, but consumes a lot of energy. Both of these traditional production processes use high-grade phosphate rock as raw mater...

Claims

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Application Information

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IPC IPC(8): C01B25/18C05G1/00
Inventor 庞世花刘阳杨位红刘树光刘洪升
Owner KINGENTA ECOLOGICAL ENG GRP
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