CN101712900A

CN101712900A - Composite industrial gasified molded coal binder

Info

Publication number: CN101712900A
Application number: CN200910218233A
Authority: CN
Inventors: 张时能
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-23
Filing date: 2009-11-23
Publication date: 2010-05-26

Abstract

The invention belongs to a composite industrial gasified molded coal binder, which is mainly used for producing a gasified molded coal by molding smokeless powdered coal. The gasified molded coal is a main raw material for producing semi-water gas and industrial fuel gas in the ammonia synthesis industry, fuel gas industry, building ceramic and the like. The binder comprises the following components in percentage by weight: 65 to 68 percent of humic acid, 2 to 5 percent of carboxymethyl cellulose, 5 to 8 percent of aluminum oxide, 15 to 18 percent of silicon oxide and 4 to 8 percent of caustic soda. The composite gasified molded coal binder is prepared by adding the binder of the invention into the water in the proportion to carry out chemical reaction and then dehydrating, drying and grinding the reaction product. The cold compression strength of the gasified molded coal such as briquette produced by the binder is 60 to 70 kilograms per briquette, the thermal compression strength is 35 to 45 kilograms per briquette, and the thermal stability is over 70 percent.

Description

A kind of composite industrial gasified molded coal binder

Technical field

The present invention relates to a kind of composite industrial gasified molded coal binder.

Background technology

Gasification briquette is used for ammonia synthesizing industry and produces manufacture fuel gas such as syngas for synthetic ammonia (semi-water gas), gas industry, smelting, architectural pottery, these industry, past is mainly made raw material production unstripped gas or fuel gas with soil Jiao, anthracite block coal, because country firmly bans coke making by indigenous methods, the anthracite block coal price soars again, so a large amount of low price anthracite fine coal that adopts is produced the only way that gas-making type coal has become these industrial raw material routes to transform.

The domestic production gasification briquette uses single prescription binding agent more, and organic binder bond is as Sodium salts humic acids binding agent, starch adesive; Mineral binder bond is as lime binding agent, potter's clay binding agent etc.The problem that these binding agent production gasification coal briquettes exist, cold conditions ultimate compression strength is good, hot ultimate compression strength, thermostability are relatively poor, the binding agent add-on is too big, as lime-carbonated coal balls, lime binding agent add-on is the 20%-25% of anthracite fine coal, and gas-making type coal fixed carbon is reduced significantly, ash increases greatly, brings heavy burden to workshop section after the gas making.

Summary of the invention

The purpose of this invention is to provide a kind of composite industrial gasified molded coal binder, be mainly used in the industrial gasification moulded coal that the anthracite fine coal moulding is produced.

Technical scheme of the present invention is as follows:

1, starting material

Humic acids: humic acids requires to dry or dry, and levigate is the 50-100 order; Aluminium sesquioxide (Al ₂O ₃, extensively be present in the nonmetalliferous ore, generally exist in the crystal water mode, resource distribution is wide): through screening, dry or dry, levigate to 100 orders; Silicon-dioxide (SiO ₂, a kind of nonmetalliferous ore, aboundresources, it is wide to distribute): dry or dry, levigate to the 100-150 order.

2, production technique

By raw material weight than requirement with humic acids, aluminium sesquioxide, silicon-dioxide, carboxymethyl cellulose is put into 70 ℃-90 ℃ the hydrothermal reaction jar is housed, put while stirring and mix, after treating that these raw materials soak in the water fully, put into caustic soda, continue to stir, through 1.5-2 hour chemical reaction, generate compound liquid-containing binder, liquid-containing binder water content 60%-70%, the liquid-containing binder drying is dewatered to 15%-20%, dry the levigate powdery solid binding agent that just gets, each raw material usage ratio is (weight percent) humic acids 65%-68%, carboxymethyl cellulose 2%-5%, aluminium sesquioxide 5%-8%, silica 1 5%-18%, caustic soda 4-8%.

Chemical reaction mechanism of the present invention: the complex adhesive that the present invention produces, be made up of organic and inorganic two big components: organic raw material humic acids and carboxymethyl cellulose add alkali reaction, the organic compound binding agent of producing that contains carboxyl, hydroxyl, quinonyl, product is the powdery solid binding agent, in briquette production, having under the condition of water, can soak into coal grain surface fast, the moulded coal cold conditions ultimate compression strength of producing is good, Heat stability is good.

Al among the present invention ₂O ₃, SiO ₂Under the alkali effect, through natridization reaction, slough the crystal water in the raw ore, form positively charged unsaturated ion A l ³⁺, Si ⁴⁺This unsaturated ion, when briquette production adds entry (general moisture content 10%-11%), because the magnetism of positively charged electronics can form complex compound with magnesium oxide, silicon oxide and other impurity in the anthracite fine coal ash, this complex compound when moulded coal enters drying kiln and dries moisture, just forms hard nonmetallic compound skeleton, with organic binder bond, make moulded coal have good cold strength; When moulded coal enters Gas-making Furnace gas making, when furnace temperature is elevated to 900 ℃-950 ℃, this complex compound just can sharply shrink, form resistant to elevated temperatures firm skeleton, make moulded coal that good hot mechanical ultimate compression strength be arranged, good thermostability is particularly arranged, and thermostability even can surpass 70% of national standard reaches more than 80%.

The compound adhesive for gasifying briquettes that the present invention produces, adhesive property is good, and the binding agent consumption is few, the every comprehensive technical indexes of moulded coal is good, add-on is generally the 2%-6% of anthracite fine coal, as producing the coal rod: the extrusion molding of coal rod, the binding agent consumption is the 2-3% of fine coal; Produce coal briquette: coal briquette coldmoulding, binding agent consumption are the 4%-6% of fine coal.The gasification briquette of producing with this binding agent, as coal briquette: cold conditions ultimate compression strength is a 60-70 kilogram/ball, a hot ultimate compression strength 35-5 kilogram/ball, thermostability is greater than 70%.

Embodiment

Embodiment 1:

At 1m ³Retort in, add 600 kilograms of 70 ℃ of-90 ℃ of hot water, put into humic acids, carboxymethyl cellulose, aluminium sesquioxide, silicon-dioxide and caustic soda successively, quantity is: 195 kilograms of humic acidss, 15 kilograms of carboxymethyl celluloses, 15 kilograms of aluminium sesquioxides, 51 kilograms of silicon-dioxide, 24 kilograms in caustic soda stirring reaction 1.5-2 hour, is emitted dewatered drying, moisture content is reduced to 15%-20%, and levigate is 200-250 order powdery solid, product plastic bag packaging.

Embodiment 2:

At 1m ³Retort in, add 600 kilograms of 70 ℃ of-90 ℃ of hot water, put into humic acids, carboxymethyl cellulose, aluminium sesquioxide, silicon-dioxide and caustic soda successively, quantity is: 204 kilograms of humic acidss, 6 kilograms of carboxymethyl celluloses, 24 kilograms of aluminium sesquioxides, 54 kilograms of silicon-dioxide, 12 kilograms in caustic soda.Stirring reaction 1.5-2 hour, emit dewatered drying, moisture content is reduced to 15%-20%, and levigate is 200-250 order powdery solid, product plastic wrapping.

Claims

1. composite industrial gasified molded coal binder, it is characterized in that each feed composition part by weight of described binding agent is: humic acids 65%-68%, carboxymethyl cellulose are 2%-5%, aluminium sesquioxide 5%-8%, silica 1 5%-18%, caustic soda 4-8%, above-mentioned component total amount is 100%.

2. the preparation method of composite industrial gasified molded coal binder according to claim 1, it is characterized in that: humic acids, aluminium sesquioxide, silicon-dioxide, carboxymethyl cellulose are put into 70 ℃-90 ℃ the hydrothermal reaction jar is housed, put while stirring and mix, after treating that these raw materials soak in the water fully, put into caustic soda, continue to stir, through 1.5-2 hour chemical reaction, generate compound liquid-containing binder, liquid-containing binder water content 60%-70%, the liquid-containing binder drying is dewatered to 15%-20%, dries the levigate powdery solid binding agent that just gets.

3. the application of composite industrial gasified molded coal binder according to claim 1 is characterised in that: the weight proportion of binding agent and anthracite fine coal is: binding agent 3%-6%, anthracite fine coal 97%-94%.