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Environment-friendly and energy-saving adhesive for phosphate rock powder pellet processing

A powder pelletizing and energy-saving technology, which is applied in the field of phosphorus chemical industry, can solve the problems of reducing the phosphorus content of pellets, decreasing the coefficient of sintering furnace, increasing the amount of sintering slag, etc., so as to prevent powdering and cracking, strengthen the strength of pellets, and improve The effect of wet bulb strength

Pending Publication Date: 2020-09-18
云南省宣威东升化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, the formation of phosphate rock powder pellets is inseparable from the binder, and the performance of the binder is directly related to the quality of the pellets. For a long time, bentonite, sodium silicate, cement, water glass, etc. have been commonly used as binders in the production of pellets. Although it can realize the function of granulation, the currently used bentonite, sodium silicate, cement, and water glass all contain SiO 2 , when returning to the sintering furnace for use, it will not only affect the alkaline condition of the sintering furnace, but also have a high burnout rate, seriously reduce the phosphorus grade of the pellets, increase the amount of slag smelted in the sintering furnace, reduce the coefficient of the sintering furnace, and reduce the fuel consumption. rise, the adhesive will undergo oxidation, decomposition and other reactions during the drying process, and the resulting thermal stress will destroy the structure of the pellets, causing the strength of the pellets to be very low, and it also brings environmental problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The environmental protection and energy-saving adhesive for processing phosphate rock powder pellets described in Example 1 includes an organic adhesive and an inorganic adhesive, and the mass ratio of the organic adhesive to the inorganic adhesive is 1:0.5; The inorganic binder is phosphate and magnesium chloride, the mass percentage of the phosphate is 98%, and the mass percentage of the magnesium chloride is 2%; the inorganic binder is added as solid powder and mixed evenly with phosphate rock powder After briquetting, the pellets are obtained. The binder and phosphate rock powder are usually in powder form, and the particle size meets the requirements; if there are larger particles, they can be pulverized first; The raw materials are dissolved in 15 times of water to obtain a mixed solution, and then based on the mixed solution, 0.5 wt% of the pasting agent in the total amount of the mixed solution is added and stirred for 10 minutes.

[0016] In this embodiment 1, ...

Embodiment 2

[0020] The environmental protection and energy-saving adhesive for processing phosphate rock powder pellets described in Example 2 includes an organic adhesive and an inorganic adhesive, and the mass ratio of the organic adhesive to the inorganic adhesive is 1.5:0.8; The inorganic binder is phosphate and magnesium chloride, the mass percentage of the phosphate is 80%, and the mass percentage of the magnesium chloride is 20%; the inorganic binder is added as solid powder and mixed with phosphate rock powder evenly After briquetting, the pellets are obtained. The binder and phosphate rock powder are usually in powder form, and the particle size meets the requirements; if there are larger particles, they can be pulverized first; The raw materials are dissolved in 18-fold water to obtain a mixed solution, and then based on the mixed solution, 0.9 wt% of the total amount of the gelatinizer is added to the mixed solution, and the mixture is stirred for 12 minutes.

[0021] In this e...

Embodiment 3

[0025] The environmental protection and energy-saving adhesive for processing phosphate rock powder pellets described in Example 3 includes an organic adhesive and an inorganic adhesive, and the mass ratio of the organic adhesive to the inorganic adhesive is 2:1; The inorganic binder is phosphate and magnesium chloride, the mass percentage of the phosphate is 60%, and the mass percentage of the magnesium chloride is 40%; the inorganic binder is added as a solid powder, mixed evenly with phosphate rock powder After briquetting, the pellets are obtained. The binder and phosphate rock powder are usually in powder form, and the particle size meets the requirements; if there are larger particles, they can be pulverized first; The raw materials are dissolved in 20 times of water to obtain a mixed solution, and then based on the mixed solution, 1.2 wt% of the total amount of the gelatinizer is added to the mixed solution, and stirred for 15 minutes to obtain the mixed solution.

[00...

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PUM

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Abstract

The invention discloses an environment-friendly and energy-saving adhesive for phosphate rock powder pellet processing. The adhesive comprises an organic adhesive and an inorganic adhesive according to a mass ratio of (1-2): (0.5-1), wherein the inorganic adhesive is phosphate and magnesium chloride, the mass percentage of the phosphate is 40-98%, and the mass percentage of magnesium chloride is 2-40%. The organic adhesive is prepared by the following steps: adding an organic polymer raw material into 15-20 times of water, dissolving to obtain a mixed solution, adding a gelatinizing agent accounting for 0.5-1.2 wt% of the total amount of the mixed solution, and stirring for 10-15 minutes. The adopted adhesive raw materials are pollution-free and have a good environmentally-friendly performance and bonding performance, after the adhesive is used, the pellet hardening speed is extremely high, the curing time is short, the strength is high, and the pulverization and cracking of pellets are prevented.

Description

technical field [0001] The invention belongs to the technical field of phosphorus chemical industry, and in particular relates to an environment-friendly and energy-saving adhesive for processing phosphate rock powder pellets. Background technique [0002] Yellow phosphorus is an important chemical raw material, which can be used to produce various phosphides and phosphates, and has a wide range of uses. The production of yellow phosphorus in my country mainly adopts the electric furnace process, and the raw material usually used is phosphate rock lump ore. However, the lump ore phosphate rock in my country's phosphate rock only accounts for one-fiftieth of the total phosphorus reserves, and most of it is phosphate rock powder. At the same time, in the process of lump ore crushing and processing, a large amount of phosphate rock powder will be produced [0003] ore, especially when using weathered phosphate rock powder ore, the fine powder ore produced usually reaches more ...

Claims

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Application Information

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IPC IPC(8): C01B25/01
CPCC01B25/01
Inventor 徐可昇徐可东徐涛
Owner 云南省宣威东升化工有限公司