Enrichment of calorific value of pyrite-type coal gangue and comprehensive utilization of iron
A technology of coal gangue and pyrite, which is applied in pyrite-type coal gangue heat value enrichment and comprehensive utilization of iron, can solve the problems of failure to propose flotation tailings destination and comprehensive utilization methods, and achieve recycling Improvement of means, improvement of chemical activity, and high dissolution rate
Active Publication Date: 2018-06-08
NANYANG ORIENTAL APPL CHEM RES INST
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This method adopts the flotation process with lime and alcohol as the conditioning agent to select the pyrite in the coal gangue, and then selects the coal in the coal gangue by flotation, but the whereabouts of the flotation tailings cannot be proposed. and comprehensive utilization
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0047] like figure 1 The shown pyrite briquette calorific value enrichment method and comprehensive utilization method of iron are prepared according to the following steps:
[0048] First, the pyrite coal gangue is pulverized to a certain fineness, and then sent to the acid leaching process to mix with the batching liquid, and sulfuric acid or hydrochloric acid is added to carry out acid leaching reaction under the condition of introducing an activator to make the silicate structure in the coal gangue. Under the action of sulfuric acid or hydrochloric acid, the aluminum element in it is converted into corresponding soluble salts and dissolved out, and the acid leaching solution and acid leaching residue are collected by filtration. The pyrite-type coal gangue refers to the coal gangue whose iron phase is pyrite (pyrite). Combined response mode.
[0049] The neutralization reaction:
[0050] Pulverize the coal gangue to 80-200 mesh, and then mix it with the acid leaching so...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| modulus | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a method for enriching the heat value of pyrite-type coal gangue and comprehensive utilization of iron. The method uses sulfuric acid or hydrochloric acid and Sodium hydroxide is used as a decomposition agent to decompose coal gangue to dissolve silicon and aluminum elements. The residue after dissolution is a mixture rich in coal and iron, which enriches the calorific value and iron grade. The resulting mixture of coal and iron is used as a circulating fluidized bed boiler fuel without mixing with coal powder, the heat energy generated is used for power generation, and the combustion residue produced is iron concentrate; it can also be used as iron-containing raw materials It is used in the preparation of polymeric ferric sulfate, high-purity iron oxide, iron phosphate, and iron oxide red industrial pigments. It has laid a foundation for the comprehensive utilization of the three elements of aluminum, iron and silicon. The recycling means of the "three wastes" in the process are perfect, no waste residue is produced, and the waste gas and waste water are fully closed and recycled.
Description
technical field [0001] The invention belongs to the technical field of coal gangue treatment, in particular to a method for enriching the calorific value of pyrite-type coal gangue and comprehensively utilizing iron. Background technique [0002] Coal gangue is a carbonaceous rock produced with coal in the process of coal formation. It is a mixture of carbonaceous mudstone, carbonaceous shale, carbonaceous sandstone, argillaceous shale, sandstone and limestone. It is 4.18-12.56MJ / kg. The mineral composition mainly includes kaolin, hydromica, montmorillonite, argillite, and quartz. Its components can be divided into two parts: inorganic and organic. The content of inorganic components is mostly, generally accounting for 75-80% of the total coal gangue. The organic components are mainly composed of carbon, hydrogen, oxygen, nitrogen and organic sulfur, which generally account for 20-25% of the total coal gangue. The ash content of coal gangue is generally about 80%, and it...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00C22B3/06C22B21/00C10L5/48C10L9/02
CPCB09B3/00B09B5/00C10L5/48C10L9/02C22B3/06C22B21/0015Y02P10/20
Inventor 肖景波
Owner NANYANG ORIENTAL APPL CHEM RES INST