Iron tailing unfired ceramsite and preparation method thereof

A technology of iron tailings and ceramsite, which is applied in the field of iron tailings unburned ceramsite and its preparation, can solve problems such as energy waste, environmental pollution, and increased production costs, and achieve high production efficiency, low production costs, and improved cylinder efficiency. The effect of compressive strength

Active Publication Date: 2021-05-14
SHENYANG POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the accumulation of iron tailings is too large, which affects environmental problems, the sintering step is often used in the production of ceramsite from iron tailings. Sintering will not only cause energy waste and pollute the environment, but sintering often requires large-scale sintering equipment for assistance. , which increases the production cost, so there are certain deficiencies

Method used

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  • Iron tailing unfired ceramsite and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] An iron tailings non-burning ceramsite, which consists of the following components in parts by weight: 60 parts of iron tailings, 20 parts of steel slag, 20 parts of fly ash, 10 parts of quicklime, 0.8 parts of dihydrate gypsum, and 0.8 parts of triethanolamine , 3 parts of sodium hydroxide, 3 parts of sodium silicate, 5 parts of sodium bicarbonate.

[0033] The preparation method of the iron tailings unfired ceramsite specifically includes the following steps.

[0034] Step 1. According to the corresponding parts by weight, each component is weighed for subsequent use.

[0035] Step 2. Use the DHG-9075A type electric blast drying oven to dry the iron tailings and steel slag and control the water content within 1%. Use a 5kg laboratory ball mill to dry the iron tailings, steel slag, triethanolamine and dihydrate gypsum The mixture is ground for 150-200 minutes, and the ground iron tailings are passed through a 300-mesh sieve to obtain fine powder.

[0036] Step 3. Mix...

Embodiment 2

[0040] An iron tailings non-burning ceramsite, which consists of the following components in parts by weight: 55 parts of iron tailings, 15 parts of steel slag, 15 parts of fly ash, 10 parts of quicklime, 0.5 parts of dihydrate gypsum, and 0.5 parts of triethanolamine , 2 parts of sodium hydroxide, 2 parts of sodium silicate, and 5 parts of sodium bicarbonate.

[0041] The preparation method of the iron tailings unfired ceramsite specifically includes the following steps.

[0042] Step 1. According to the corresponding parts by weight, each component is weighed for subsequent use.

[0043] Step 2. Use the DHG-9075A type electric blast drying oven to dry the iron tailings and steel slag and control the water content within 1%. Use a 5kg laboratory ball mill to dry the iron tailings, steel slag, triethanolamine and dihydrate gypsum The mixture is ground for 150-200 minutes, and the ground iron tailings are passed through a 300-mesh sieve to obtain fine powder.

[0044] Step 3....

Embodiment 3

[0048] An iron tailings unburned ceramsite, which consists of the following components in parts by weight: 65 parts of iron tailings, 25 parts of steel slag, 25 parts of fly ash, 15 parts of quicklime, 1 part of dihydrate gypsum, and 1 part of triethanolamine , 4 parts of sodium hydroxide, 4 parts of sodium silicate, 10 parts of sodium bicarbonate.

[0049] The preparation method of the iron tailings non-burning ceramsite includes the following steps: Step 1. According to the corresponding parts by weight, each component is weighed for later use.

[0050] Step 2. Use the DHG-9075A type electric blast drying oven to dry the iron tailings and steel slag and control the water content within 1%. Use a 5kg laboratory ball mill to dry the iron tailings, steel slag, triethanolamine and dihydrate gypsum The mixture is ground for 150-200 minutes, and the ground iron tailings are passed through a 300-mesh sieve to obtain fine powder.

[0051] Step 3. Mix all components into a mixer and...

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Abstract

The invention relates to the technical field of building materials and ceramsite preparation. An iron tailing unfired ceramsite is prepared from the following components in parts by weight: 55-65 parts of iron tailings, 15-25 parts of steel slag, 15-25 parts of fly ash, 10-15 parts of quick lime, 0.5-1 part of dihydrate gypsum, 0.5-1 part of triethanolamine, 2-4 parts of sodium hydroxide, 2-4 parts of sodium silicate and 5-10 parts of sodium bicarbonate. The preparation method comprises the following steps: carrying out ball milling on the iron tailings until the particle size is less than 300 meshes, decomposing under the action of sodium silicate and sodium hydroxide strong alkali solution, releasing active ions, and reacting with alkaline components in the solution to generate a gelling hydration product, thereby forming an alkali-activated iron tailing gelling material matrix; and meanwhile, adding, heating and decomposing sodium bicarbonate in the steam curing process to generate carbon dioxide gas which is fixed in the matrix, and finally finishing the baking-free ceramsite with the porous interior is formed after curing. According to the preparation method, a sintering process is not needed, the prepared ceramsite is good in performance in all aspects, the problems of tailing treatment and stacking are solved to a great extent, and the sustainable development strategy of ecological environmental protection is met.

Description

technical field [0001] The invention relates to the technical field of building materials and ceramsite preparation, in particular to iron tailings non-fired ceramsite and a preparation method thereof. Background technique [0002] Tailings are wastes that are discharged in the form of slurry after crushing, beneficiation, and processing of ores to form concentrates. They have the characteristics of fine particles, large quantities, and residual trace metal minerals and large amounts of non-metallic minerals. The iron tailings with the largest amount of accumulation in my country requires 2.5-3.0 tons of iron tailings to be discharged for every 1 ton of iron concentrate produced, accounting for 1 / 3 of the total iron tailings, and its utilization rate is low. Most of the iron tailings use Landfill treatment has formed a large number of iron tailings pools. Iron tailings need to occupy more land to build iron tailings ponds for storage, which not only encroached on the land, b...

Claims

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Application Information

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IPC IPC(8): C04B18/02C04B18/12C04B18/14C04B18/08
CPCC04B18/027C04B18/021C04B18/12C04B18/142C04B18/08C04B22/064C04B22/143C04B22/062C04B12/04C04B22/106Y02W30/91
Inventor 宁宝宽苏文轩顾晓薇那芳溪张文馨刘剑平
Owner SHENYANG POLYTECHNIC UNIV
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