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A method of utilizing potassium feldspar to manufacture potassium sulfate fertilizer and co-produce special cement

A technology of special cement and potassium feldspar, which is applied in the fields of potash fertilizer, cement production, chemical instruments and methods, etc., can solve the problems of low output ratio of potassium sulfate, unhandy tailings, and environmental pollution, and achieve short industrial chain and low investment Small size and low energy consumption

Active Publication Date: 2016-06-22
江苏纳鼎材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages in the prior art of utilizing potassium rock to produce potassium sulfate, the output ratio is low, the energy consumption is high, the industrial chain is long when the by-products are separated, the investment is large, it is difficult to industrialize, and the tailings cannot be processed and pollute the environment. The purpose is to provide a method for utilizing potassium rock to produce potash fertilizer co-production special cement such as radiation-resistant cement and white cement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment one: utilize potassium rock to manufacture potassium sulfate fertilizer co-production special cement, it is to collect potassium sulfate in kiln tail dust collection cover earlier, then the slag that kiln head is discharged is produced special cement such as radiation-resistant cement, white cement, its production method Including the following steps:

[0022] Prepare materials: first prepare the following materials in parts by weight, potassium rock 40, limestone 40, barite 18, fluorite 2, total 100;

[0023] Crushing: firstly crush potassium rock, limestone, barite and fluorite to less than 20mm and pre-homogenize;

[0024] Batching grinding and homogenization: the materials obtained in step 2 are mixed according to the ratio of step 1, and then put into the grinding mill, and the raw materials pass through a 180-200 mesh sieve and put into storage for homogenization;

[0025] Calcination: Homogenized qualified raw meal (TCaCO 3 No more than ±0.2%...

Embodiment 2

[0030] Embodiment two: utilize potassium rock to manufacture potash fertilizer co-production special cement, as anti-radiation cement or white cement, its production method comprises the steps: Prepare materials: first prepare the following materials by weight percentage, potassium rock 38, limestone 41, barite 20, fluorite 1, the total amount is 100;

[0031] Crushing: firstly crush potassium rock, limestone, barite and fluorite to less than 20mm and pre-homogenize;

[0032] Batching grinding and homogenization: the materials obtained in step 2 are mixed according to the ratio of step 1, and then put into the grinding mill, and the raw materials pass through a 180-200 mesh sieve and put into storage for homogenization;

[0033] Calcination: Homogenized qualified raw meal (TCaCO 3 Not exceeding ±0.2%) into the kiln for calcination, and the firing temperature is controlled at 1350°C to 1400°C;

[0034] The production of potash fertilizer:

[0035] A. Potassium sulfa...

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Abstract

The invention discloses a method for preparing a potassium sulphate fertilizer and co-producing special cement from a potassium rock. Firstly, a potassium fertilizer is separated from the potassium rock; and then the special cement is prepared from the separated slag. The method comprises the steps of preparing materials, crushing, grinding and homogenizing, burning, preparing the potassium fertilizer and preparing the cement, wherein the materials are 37-43 parts of potassium rock, 38-45 parts of lime stone, 16-22 parts of barite, and 1-2 parts of fluorite according to parts by weight; the burning temperature is 1350-1400 DEG C; and the preparation of the potassium fertilizer and the special cement comprises the steps of collecting the burnt dust clinker form a kiln tail, adding water to dissolve, centrifugally separating, concentrating, baking the obtained liquid to obtain potassium sulphate, baking and fully cooling the separated solid material and adding proper gypsum and cement clinker to grind and screen in common, checking out the obtained fine powder and packaging into the special cement. The method has the advantages of high potassium sulphate output ratio, low energy consumption, short industry chain when a by-product is separated, small investment, and easiness for industrialization; and the problem that the tailings cannot be treated in the prior art to pollute the environment is overcome.

Description

technical field [0001] The invention relates to a method for producing potassium sulfate by using potassium rock and using its tailings to produce special cement, such as anti-radiation cement and white cement, which belongs to the field of chemical fertilizers or building materials. Background technique [0002] Since potassium is one of the three essential elements in agricultural production, people began to use potassium rocks such as potassium feldspar, sericite, and leucite to produce potassium fertilizers more than a hundred years ago, because potassium rocks are stable The silicate network regular tetrahedral structure of silicate can not be decomposed by acid and alkali under normal temperature and pressure, nor can it be replaced by conventional substances. Even at high temperatures, it is difficult to achieve the purpose of complete decomposition. When mining and dumping, the use of potassium rocks to produce potassium fertilizers has high costs and no economic ben...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D1/04C01D5/00C04B7/14
CPCY02P40/10
Inventor 雷志刚陈淑萍
Owner 江苏纳鼎材料科技有限公司