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Method for producing low-iron limestone

A production method and limestone technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of low production efficiency, complicated procedures, and high processing cost, and achieve improved production efficiency, accelerated reaction speed, and excellent quality. Effect

Active Publication Date: 2013-12-11
GUANGXI SHILIN MINING IND SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a production method of low-iron limestone, which can overcome the problems of complex procedures, low production efficiency, and high processing cost of existing processing methods, and make ordinary limestone become ultra-low-iron limestone after treatment without affecting limestone minerals The content or influence of calcium carbonate in the medium is very small, and the indicators have reached or partially exceeded the indicators of calcite, and the treatment method is environmentally friendly and does not pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for producing low-iron limestone, comprising the following steps:

[0031] 1. Crush limestone minerals, pass through a 16-mesh sieve, and then pass through a 12000GS permanent magnet rod to obtain limestone powder;

[0032] 2. Take the raw materials in the following parts by weight: 20% by weight of hydrochloric acid 120kg, 35% by weight of acetic acid 150kg, and 15% by weight of phosphorus trichloride 20kg, mix to obtain mixture A;

[0033] 3. Mix mixture A and water at a weight ratio of 1:200, and stir evenly to obtain mixture B;

[0034] 4. Heat the limestone powder to a temperature of 90°C under a thermostat, put the limestone powder into the upper layer of the mixing box, mix the mineral powder and the mixture B at a weight ratio of 1:4, stir for 3 minutes, and put it into a stirring tank with a sieve at the bottom. In the middle layer of the box, filter, the filtered solution is placed in the lower layer of the mixing box, the mineral powder is placed on t...

Embodiment 2

[0038] A method for producing low-iron limestone, comprising the following steps:

[0039] 1. Crush the limestone, pass through a 10-mesh sieve, and then pass through a 10,000GS permanent magnet rod to obtain limestone powder;

[0040] 2. Take the raw materials in the following parts by weight: 100 kg of hydrochloric acid 15% by weight, 120 kg of acetic acid 120 kg of 30% by weight, 12 kg of phosphorus trichloride 8% by weight, and mix to obtain mixture A;

[0041] 3. Mix mixture A and water at a weight ratio of 1:100, and stir evenly to obtain mixture B;

[0042] 4. Heat the limestone powder to a temperature of 80°C under the thermostat, put the limestone powder into the upper layer of the mixing box, mix the mineral powder and the mixture B at a weight ratio of 1:3, stir for 2 minutes, and put it into the stirring tank with a sieve at the bottom. The middle layer of the box is filtered, and the filtered solution is placed in the lower layer of the stirring box, and the mine...

Embodiment 3

[0045] A method for producing low-iron limestone, comprising the following steps:

[0046] 1. Crush the limestone, pass it through an 8-mesh sieve, and then pass it through a 1000GS permanent magnet drum to obtain limestone powder;

[0047] 2. Take the raw materials in the following parts by weight: 85 kg of 12% hydrochloric acid by weight, 95 kg of 28% acetic acid by weight, and mix to obtain mixture A;

[0048] 3. Mix mixture A and water at a weight ratio of 1:80, and stir evenly to obtain mixture B;

[0049] 4. Heat the limestone powder to a temperature of 75°C under a thermostat, put the limestone powder into the upper layer of the mixing box, mix the mineral powder and the mixture B at a weight ratio of 1:3.5, stir for 2 minutes, and put it into a stirring tank with a screen at the bottom. In the middle layer of the box, filter, the filtered solution is placed in the lower layer of the mixing box, the mineral powder is placed on the conveyor belt, and dried;

[0050] 5....

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Abstract

The invention discloses a method for producing low-iron limestone. The method comprises the following operation steps: weighing the following raw materials in parts by weight: 80-120 parts of hydrochloric acid with the weight percentage of 10-20%, 80-150 parts of acetic acid with the weight percentage of 25-35% and 0-20 parts of phosphorus trichloride with the weight percentage of 5-15%; uniformly mixing the raw materials so as to obtain a mixture A; mixing the mixture A with water according to a weight ratio of 1:(50-200); uniformly stirring so as to obtain a mixture B; heating limestone powder to the temperature of 70-90 DEG C in a thermostat; feeding the limestone powder into the upper layer of a stirring box; mixing the limestone powder with the mixture B according to a weight ratio of 1:(2-4); stirring for 1-3 minutes; feeding into the stirring box middle layer provided with a screening net at the bottom; filtering; feeding a filtered solution into the lower layer of the stirring box; drying the limestone powder. By utilizing the method, a limestone raw material of which the iron content is less than or equal to 50ppm can be prepared, the production efficiency is high, the treatment cost is low, a treatment method is environment-friendly, and the environment is not polluted.

Description

technical field [0001] The invention belongs to the field of mineral processing, and relates to a production method of low-iron limestone. Background technique [0002] Most areas from south to north in Guangxi belong to karst landform, but they are extremely rich in limestone mineral resources. Limestone raw materials have been mainly used in the construction industry for a long time, and the price is quite low. With the development of society and the continuous improvement of science and technology, the amount of high-grade limestone products in chemical industry, smelting, cement, glass, food, feed, medicine and other industries has increased several times every year. Especially in the glass industry, the demand for high-grade low-iron limestone is more prominent in the production of new products and high-end products; the ultra-clear glass, photovoltaic glass, glassware, and Low-E glass produced by domestic and foreign glass manufacturers have always used top-level raw m...

Claims

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Application Information

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IPC IPC(8): C01F11/16
Inventor 庞歆黄增宁
Owner GUANGXI SHILIN MINING IND SCI & TECH CO LTD
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