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Coal gasification coarse slag non-fired material and preparation method thereof

A technology of coal gasification and coarse slag, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of high energy consumption, low utilization rate of raw materials, and low efficiency

Inactive Publication Date: 2018-05-11
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current ceramsite production process is still mainly high-temperature sintering method. In view of the continuous increase in the cost of raw materials and energy at this stage, and most production units have problems such as high energy consumption, low efficiency, and low utilization of raw materials, this is to a large extent This increases the difficulty of the development of ceramsite production enterprises and the improvement of the market competitiveness of products, and on the basis of existing research, the problem of raw material composition ratio and maintenance process conditions that have not been effectively solved has been studied.

Method used

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  • Coal gasification coarse slag non-fired material and preparation method thereof
  • Coal gasification coarse slag non-fired material and preparation method thereof
  • Coal gasification coarse slag non-fired material and preparation method thereof

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preparation example Construction

[0063]The present invention also provides a method for preparing the above-mentioned non-burning material, comprising: S) mixing 63-75 parts by weight of coal gasification coarse slag, 15-25 parts by weight of cement and 10-12 parts by weight of quartz sand with water , curing after molding to obtain non-burning materials; the mass ratio of the coal gasification coarse slag to cement is (4-5):1 or (2-2.52):1.

[0064] Wherein, the coal gasification coarse slag, cement and quartz sand are all the same as above, and will not be repeated here.

[0065] According to the present invention, the particle size of the coal gasification coarse slag is preferably 60 mesh or less; the raw material of the coal gasification coarse slag is preferably dried first, pulverized and then sieved to obtain the coal gasification coarse slag; the drying temperature is preferably 100°C to 120°C, more preferably 100°C to 110°C, and more preferably 105°C; the drying time is preferably 1 to 3 hours, more...

Embodiment 1～7 and comparative example 1～2

[0083] Raw material pretreatment: put the coal gasification coarse slag in an oven at 105°C for 2 hours to make it completely dry; then use a grinder to crush the dried coarse slag raw material for 2 minutes to grind the coarse slag finely; then use a 60-mesh sieve to sieve, The dry and finely ground coal cinder under the sieve was used as the test raw material, and then the coal gasification coarse slag raw material was dissolved in 32% (relative to the dry material) of 5% NaOH solution, stirred for 5 min and then filtered, and the filter residue on the filter paper was dried. as test material;

[0084] Cement can be directly used in the test without treatment;

[0085] Dry the quartz sand and crush it, then sieve the crushed quartz sand with a 60-mesh sieve, and take the dry and fine quartz sand powder as the test auxiliary material.

[0086] Mixing of raw materials: the pretreated raw materials, according to the proportioning in Table 3 (experimental group 1 is comparative...

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Abstract

The invention provides a non-fired material. The non-fired material comprises, by weight, 63-75 parts of coal gasification coarse slag, 15-25 parts of cement and 10-12 parts of quartz sands; and a mass ratio of the coal gasification coarse slag to the cement is (4-5):1 or (2-2.52):1. Compared with materials in the prior art, the non-fired material has the following advantages: the coal gasification coarse slag, cement and quartz sands are mixed according to a certain ratio, the quartz sands are used to supplement glass in the coal gasification coarse slag, and the cement is used to improve theactivity of the coal gasification coarse slag, so the hardening speed of the non-fired material is accelerated, and the strength of the non-fired material is increased.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a burning-free material and a preparation method thereof. Background technique [0002] Coal gasification coarse slag has a huge output, low calorific value, and large particle size. The existing disposal and utilization methods at home and abroad are not very effective. Generally, landfill or open-air stacking are used for disposal, but these disposal methods not only encroach on precious soil resources , and because it contains heavy metal elements such as chromium (Cr) and arsenic (As), and the content of each polycyclic aromatic hydrocarbon component far exceeds the maximum content standard stipulated by the international public health and environmental organization, it has caused great harm to the environmental medium and human health. The threat of risk will also cause air pollution due to dust escape. Therefore, it is particularly important to study...

Claims

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Application Information

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IPC IPC(8): C04B18/02C04B18/06
CPCC04B18/027C04B18/021C04B14/06C04B18/065Y02W30/91
Inventor 张凯刘舒豪翟宇嘉
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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